This document summarizes the Lower Susquehanna River Watershed Assessment being conducted to evaluate sediment and nutrient management strategies in the watershed and their impacts on the Chesapeake Bay. The assessment involves developing watershed and reservoir models, analyzing sediment transport under different scenarios, and identifying management strategies. Stakeholder outreach includes quarterly updates and a project website. Field work includes sediment sampling and bathymetric surveys to support model development and calibration.
EarthFx presentation on Assessing Cumulative Effects of SAGD Operations in the Mackay Watershed PowerPoint
To learn more visit us at http://www.earthfx.com/
Slide 33 video link https://www.youtube.com/watch?v=q95Zzt029E4
Slide 35 video link https://www.youtube.com/watch?v=v6siBetQgBI
The document summarizes the development of an integrated surface water and groundwater model of the MacKay River watershed in Alberta, Canada to assess cumulative effects of oil sands development on water resources. Key aspects of the model include: (1) A fully distributed representation of geology, hydrogeology, climate and land cover at a 400x400m resolution for groundwater and finer 200x200m resolution for surface water; (2) Calibration of both surface water and groundwater submodels to streamflow and groundwater level observations; and (3) Simulation of key hydrologic processes like groundwater-surface water interaction and frozen ground conditions. The calibrated model is able to match observed streamflow and groundwater levels over
This document summarizes water management practices for hydraulic fracturing in unconventional reservoirs in Argentina. It discusses water sources used, types of stimulation treatments performed, and water logistics. The primary water sources are rivers and underground wells in the Neuquén Basin, which meet requirements for use in fracturing fluids. Stimulation treatments in the Vaca Muerta shale play typically use hybrid slickwater followed by gel systems. Water volumes used can range from 5,500 m3 for vertical wells to 18,000 m3 for horizontal wells. The document also outlines typical fluid systems used and some area-specific variations.
Cost (& Time) Optimization of Hydrogeological StudiesGidahatari Agua
Cost optimization has to identify the most common problems to the hydrogeological investigation as travel time and transport issues, seasonal restrictions, personal availability, protocols, etc. This post is focused on strategies and best practices for cost (& time) optimization, specially for hydrogeological investigation on mining projects.
Range Resources Voluntary Plan to Close Yeager Wastewater Impoundment in SWPAMarcellus Drilling News
A voluntary plan created and submitted by Range Resources to the Pennsylvania Dept. of Environmental Protection to permanently close (and restore) the Yeager wastewater impoundment (i.e. open pond) site in Amwell Township, located in Washington County, PA. The plan was tweaked by the DEP to require Range to test for certain compounds underneath the two liners in the impoundment--liners that, according to Range, had holes in both layers.
This technical memorandum summarizes additional groundwater modeling analyses conducted for the Fort Lewis Department of the Army Public Works regarding the North Sequalitchew Creek project. The modeling analyses focused on updating inputs and incorporating new data from the last 4 years of monitoring in the Sequalitchew Creek basin. An updated model incorporated recent wetland water levels and flow data from the diversion canal. A second model explicitly included Sequalitchew Lake and conducted sensitivity analyses looking at dry year conditions and changing boundary conditions near Sequalitchew Springs. The revisions refined predictions of surface and groundwater interactions and results from both the updated and lake models continued to indicate drawdown at Sequalitchew Springs would be immeasurable.
This document provides an introduction and overview of groundwater modeling. It discusses why groundwater modeling is needed for effective groundwater management. It outlines the modeling process, including developing a conceptual model, selecting governing equations, model design, calibration, validation, and using the model for prediction. It describes different types of mathematical models, including analytical, finite difference, and finite element models. It emphasizes that a modeling protocol should establish the modeling purpose and ensure the conceptual model adequately represents the system behavior. The document stresses the importance of calibration, verification, and sensitivity analysis to evaluate a model's ability to reproduce measured conditions and the effects of uncertainty.
This document provides an overview of a presentation on MODFLOW given by Nisha Belbase and Prabin Banstola. It discusses the history and development of MODFLOW as a groundwater flow model developed by the USGS. It then describes key aspects of MODFLOW including its governing equations, inputs, outputs, versions, advantages, and disadvantages. Finally, it provides examples of MODFLOW being used for numerical modeling of groundwater in the Kathmandu Valley in Nepal.
EarthFx presentation on Assessing Cumulative Effects of SAGD Operations in the Mackay Watershed PowerPoint
To learn more visit us at http://www.earthfx.com/
Slide 33 video link https://www.youtube.com/watch?v=q95Zzt029E4
Slide 35 video link https://www.youtube.com/watch?v=v6siBetQgBI
The document summarizes the development of an integrated surface water and groundwater model of the MacKay River watershed in Alberta, Canada to assess cumulative effects of oil sands development on water resources. Key aspects of the model include: (1) A fully distributed representation of geology, hydrogeology, climate and land cover at a 400x400m resolution for groundwater and finer 200x200m resolution for surface water; (2) Calibration of both surface water and groundwater submodels to streamflow and groundwater level observations; and (3) Simulation of key hydrologic processes like groundwater-surface water interaction and frozen ground conditions. The calibrated model is able to match observed streamflow and groundwater levels over
This document summarizes water management practices for hydraulic fracturing in unconventional reservoirs in Argentina. It discusses water sources used, types of stimulation treatments performed, and water logistics. The primary water sources are rivers and underground wells in the Neuquén Basin, which meet requirements for use in fracturing fluids. Stimulation treatments in the Vaca Muerta shale play typically use hybrid slickwater followed by gel systems. Water volumes used can range from 5,500 m3 for vertical wells to 18,000 m3 for horizontal wells. The document also outlines typical fluid systems used and some area-specific variations.
Cost (& Time) Optimization of Hydrogeological StudiesGidahatari Agua
Cost optimization has to identify the most common problems to the hydrogeological investigation as travel time and transport issues, seasonal restrictions, personal availability, protocols, etc. This post is focused on strategies and best practices for cost (& time) optimization, specially for hydrogeological investigation on mining projects.
Range Resources Voluntary Plan to Close Yeager Wastewater Impoundment in SWPAMarcellus Drilling News
A voluntary plan created and submitted by Range Resources to the Pennsylvania Dept. of Environmental Protection to permanently close (and restore) the Yeager wastewater impoundment (i.e. open pond) site in Amwell Township, located in Washington County, PA. The plan was tweaked by the DEP to require Range to test for certain compounds underneath the two liners in the impoundment--liners that, according to Range, had holes in both layers.
This technical memorandum summarizes additional groundwater modeling analyses conducted for the Fort Lewis Department of the Army Public Works regarding the North Sequalitchew Creek project. The modeling analyses focused on updating inputs and incorporating new data from the last 4 years of monitoring in the Sequalitchew Creek basin. An updated model incorporated recent wetland water levels and flow data from the diversion canal. A second model explicitly included Sequalitchew Lake and conducted sensitivity analyses looking at dry year conditions and changing boundary conditions near Sequalitchew Springs. The revisions refined predictions of surface and groundwater interactions and results from both the updated and lake models continued to indicate drawdown at Sequalitchew Springs would be immeasurable.
This document provides an introduction and overview of groundwater modeling. It discusses why groundwater modeling is needed for effective groundwater management. It outlines the modeling process, including developing a conceptual model, selecting governing equations, model design, calibration, validation, and using the model for prediction. It describes different types of mathematical models, including analytical, finite difference, and finite element models. It emphasizes that a modeling protocol should establish the modeling purpose and ensure the conceptual model adequately represents the system behavior. The document stresses the importance of calibration, verification, and sensitivity analysis to evaluate a model's ability to reproduce measured conditions and the effects of uncertainty.
This document provides an overview of a presentation on MODFLOW given by Nisha Belbase and Prabin Banstola. It discusses the history and development of MODFLOW as a groundwater flow model developed by the USGS. It then describes key aspects of MODFLOW including its governing equations, inputs, outputs, versions, advantages, and disadvantages. Finally, it provides examples of MODFLOW being used for numerical modeling of groundwater in the Kathmandu Valley in Nepal.
This document summarizes the use of liquid curable resin (LCR) systems to control proppant flowback in hydraulic fracturing operations in Argentina. Various operators applied LCR either during initial fracturing treatments by coating proppant on-site, or as remedial treatments by injecting resin into existing fractures. LCR treatments helped stop proppant flowback while maintaining production rates, reducing cleanout costs compared to untreated wells. Lessons showed resin concentration and additive selection are important to maximize proppant pack strength and conductivity. Field results demonstrated LCR treatments effectively control solids flowback to optimize well productivity.
The document discusses a proposed constructed wetland system to remediate high levels of nitrogen, phosphorus, and turbidity in Eighteen Mile Creek near Lake Hartwell. The goals are to reduce total nitrogen and phosphorus through phytoremediation and microbial interactions to meet state standards. Historical water quality and flow rate data were analyzed to understand the problem. A hybrid constructed wetland system is proposed, combining horizontal and vertical flow beds to achieve high nutrient removal. Key components include media, piping, pumps, and plant species. Maintaining the system is estimated to require 1 hour per week. The total installation cost is estimated to be $3,117,611.72.
Hydraulic fracturing has been used in Argentina since the 1960s and water management practices for shale development have evolved significantly. For the large Vaca Muerta shale play in Argentina, water sources include rivers, lakes, and underground wells. Water is transported using trucks and pipelines and stored in mobile tanks and lined pits. Early exploration used vertical wells requiring around 6,500 m3 of water while current horizontal wells use around 14,500 m3. Stimulation typically uses hybrid treatments combining slickwater, linear gel, and crosslinked gel depending on the reservoir fluid. As development continues, produced and treated flowback water are being tested for potential reuse in fracturing fluids to reduce freshwater usage.
This document provides details of William G. Olsen's professional experience as a geologist and hydrogeologist working for The Chazen Companies in New York State from 2002 to present. It describes his roles and responsibilities in field work and projects related to groundwater resources, environmental site assessments, and remediation investigations. Specific projects discussed include a groundwater resource investigation for a water district expansion, evaluating well performance through specific capacity analysis, and developing a backup groundwater source for a municipality.
The document summarizes the US Army Corps of Engineers' involvement in studying sediment management behind dams on the Lower Susquehanna River and its impacts on the Chesapeake Bay. It provides background on how the Corps became involved in 2002 to examine sediment management measures. It describes initial plans for a reconnaissance study of dredging alternatives that was not implemented due to lack of funding support. The document outlines the Corps' current proposal for a sediment management plan to evaluate watershed-scale sediment reduction options and their impacts using modeling tools.
LIDDLE - Project-Related Work ExperienceGeorge Liddle
George Lee Liddle, III has experience with a variety of projects related to water quality, stormwater, and environmental site assessments. Some of his major projects include a TMDL diagnostic and restoration project in Upper San Marcos Creek Watershed in California, monitoring and sampling at a former oil refinery and metals recycling facility in National City, California, and municipal stormwater detention basin sampling in Poway, California. He has also conducted Phase I environmental site assessments for various sites in Mexico and projects involving brownfield redevelopment, aquatic pesticide application, and hazardous waste assessment.
DRBC Docket: XTO Energy Application to Withdraw Surface Water at Oquaga CreekMarcellus Drilling News
Delaware River Basin Commission - Hearing to review an application form XTO Energy to withdraw .25 million gallons of water per day from the Oquaga Creek in the Town of Sanford, NY for purposes of shale gas drilling exploration and production.
This document discusses using the MODFLOW groundwater model to evaluate the impact of artificial groundwater recharge in Abbid Sarbishe, Iran. A conceptual model of the study area was developed using hydrogeological data and discretized into a grid for use in MODFLOW. The model was calibrated and validated before using it to simulate different levels of artificial recharge. The results show that recharge has the greatest impact on piezometers closest to the recharge site, with water levels rising up to 2.25 meters. Western parts of the recharge site had a larger impact due to thinner unsaturated zones in the aquifer in that area.
The document provides details about a project to design a low-flow siphon for environmental releases below Pilarcitos Dam for the San Francisco Public Utility Commission. The current siphon does not operate well during low reservoir levels in warm months. The project team's objective is to optimize the current siphon's design for drought conditions by reducing head losses. The team considered modifying the current design, using a solar pump, or installing a siphon over the dam. Their final design includes a throttling device and lip seal to control water flow at low rates without frequent maintenance. Computer simulations and prototype testing supported that the new design can sustain siphon flow at rates from 0.5 to over 3 cubic feet per second.
1) The document discusses stormwater retrofit assessments (SRA) conducted by Metro Conservation Districts to identify the most cost-effective locations for installing stormwater best management practices (BMPs).
2) An SRA involves delineating subwatersheds and catchments, analyzing land use and soil data, identifying potential BMP locations, modeling BMP designs and pollutant reductions, and ranking catchments based on performance metrics like cost per pound of pollutant reduced.
3) The assessments help direct limited funding and labor resources to projects that provide the greatest water quality benefits, in support of total maximum daily load implementation plans.
This document summarizes the use of a packerless, multistage fracture stimulation method called pinpoint fracturing (PPF) in Argentina. Key points:
1) PPF has been used to complete 22 wells with 193 fractures since 2006, allowing more selective stimulation and aggressive fracturing treatments.
2) The method uses coiled tubing to hydrajet perforate intervals and pump fracturing fluid down the annulus, isolating stages with sand or bridge plugs.
3) A case study describes applying PPF across 9 wells with 90 stages, reducing completion times compared to conventional methods using packers.
Andy Malone is a Principal Geologist and Vice President at Wildermuth Environmental, Inc. with over 20 years of experience in water resources and geology. Some of his most significant projects include redefining groundwater sub-basin boundaries and water quality objectives for the Santa Ana River Watershed, developing a strategic plan for the Six Basins Watermaster to improve water resources management, and conducting studies on land subsidence in the Chino Basin. Currently, he is managing development of the strategic plan for the Six Basins Watermaster and evaluating project alternatives through computer modeling of physical impacts and cost analyses.
14 aneu applications of technological & engineering solutions edit Juan Carlos Bonapace
The document summarizes the application of technological solutions to stimulate an old vertical well (drilled in 1974) targeting the Vaca Muerta Formation in Neuquén Basin, Argentina. The objectives were to recondition the well using a swell packer and stimulate the entire Vaca Muerta section with 12 fracturing stages using pinpoint stimulation technique. Key steps included logging the well, setting a swell packer, and performing 12-stage fracturing of the Vaca Muerta formation using coiled tubing and a pinpoint technique to optimize stimulation of the target zone.
This document summarizes Juan Carlos Bonapace's presentation on proppant management challenges for developing unconventional reservoirs in Argentina. It discusses reservoir conditions, typical proppant types and amounts used, improvements to proppant supply logistics, laboratory testing of local Argentine sand as a potential proppant, and conclusions. Key points include closure stresses on proppant in Argentine reservoirs ranging from 1,000-5,000 psi, use of 3-4 mesh sizes and ceramic-sand blends for shales, potential for coating local sand to improve crush resistance for use at higher closure stresses, and cost-effective proppant alternatives being important to sustainable unconventional development.
The California Central Valley Groundwater-Surface Water Simulation Model (C2VSim) simulates the monthly response of the Central Valley’s groundwater and surface water flow system to historical stresses, and can also be used to simulate the response to projected future stresses. C2VSim contains monthly historical stream inflows, surface water diversions, precipitation, land use and crop acreages from October 1921 through September 2009. The model dynamically calculates crop water demands, allocates contributions from precipitation, soil moisture and surface water diversions, and calculates the groundwater pumpage required to meet the remaining demand.
This paper discusses optimization of hydrocarbon production in the Cerro Dragon oilfield in Argentina using latest formation evaluation and perforating technologies. It summarizes how nuclear magnetic resonance (NMR) logging helped identify different hydrocarbon types in reservoirs that conventional logs could not distinguish. A propellant-assisted perforating (PAP) method was proposed to optimize well productivity while maintaining safety. The PAP method uses oxidizer to create high pressures and mild fracturing near the wellbore. The paper focuses on applications of PAP in the San Jorge basin, including enhancing connectivity beyond damaged zones and near water contacts where hydraulic fracturing is not feasible.
This document summarizes an integrated surface water and groundwater model developed for the MacKay River watershed in Alberta, Canada to assess cumulative effects of oil sands operations on water resources. The model was calibrated against streamflow and groundwater level observations over a 38-year period. Key features included a 400m groundwater grid, 200m surface hydrology grid, representation of geology, climate inputs, vegetation/wetlands, and frozen ground processes. The calibrated model will be used to simulate current and future conditions to evaluate sustainability.
This document summarizes an integrated surface water and groundwater model developed for the MacKay River watershed in Alberta, Canada to assess cumulative effects of oil sands operations. The model was calibrated against streamflow and groundwater level observations over a 38-year period. Key features included a 400m groundwater grid, 200m surface hydrology grid, representation of geology and hydrostratigraphy with 17 layers, and simulation of lateral groundwater and surface water interactions, frozen ground processes, and feedback between surface water and groundwater systems. The calibrated model was used to evaluate sustainability of current and future water use from the watershed under different development scenarios.
This document summarizes the use of liquid curable resin (LCR) systems to control proppant flowback in hydraulic fracturing operations in Argentina. Various operators applied LCR either during initial fracturing treatments by coating proppant on-site, or as remedial treatments by injecting resin into existing fractures. LCR treatments helped stop proppant flowback while maintaining production rates, reducing cleanout costs compared to untreated wells. Lessons showed resin concentration and additive selection are important to maximize proppant pack strength and conductivity. Field results demonstrated LCR treatments effectively control solids flowback to optimize well productivity.
The document discusses a proposed constructed wetland system to remediate high levels of nitrogen, phosphorus, and turbidity in Eighteen Mile Creek near Lake Hartwell. The goals are to reduce total nitrogen and phosphorus through phytoremediation and microbial interactions to meet state standards. Historical water quality and flow rate data were analyzed to understand the problem. A hybrid constructed wetland system is proposed, combining horizontal and vertical flow beds to achieve high nutrient removal. Key components include media, piping, pumps, and plant species. Maintaining the system is estimated to require 1 hour per week. The total installation cost is estimated to be $3,117,611.72.
Hydraulic fracturing has been used in Argentina since the 1960s and water management practices for shale development have evolved significantly. For the large Vaca Muerta shale play in Argentina, water sources include rivers, lakes, and underground wells. Water is transported using trucks and pipelines and stored in mobile tanks and lined pits. Early exploration used vertical wells requiring around 6,500 m3 of water while current horizontal wells use around 14,500 m3. Stimulation typically uses hybrid treatments combining slickwater, linear gel, and crosslinked gel depending on the reservoir fluid. As development continues, produced and treated flowback water are being tested for potential reuse in fracturing fluids to reduce freshwater usage.
This document provides details of William G. Olsen's professional experience as a geologist and hydrogeologist working for The Chazen Companies in New York State from 2002 to present. It describes his roles and responsibilities in field work and projects related to groundwater resources, environmental site assessments, and remediation investigations. Specific projects discussed include a groundwater resource investigation for a water district expansion, evaluating well performance through specific capacity analysis, and developing a backup groundwater source for a municipality.
The document summarizes the US Army Corps of Engineers' involvement in studying sediment management behind dams on the Lower Susquehanna River and its impacts on the Chesapeake Bay. It provides background on how the Corps became involved in 2002 to examine sediment management measures. It describes initial plans for a reconnaissance study of dredging alternatives that was not implemented due to lack of funding support. The document outlines the Corps' current proposal for a sediment management plan to evaluate watershed-scale sediment reduction options and their impacts using modeling tools.
LIDDLE - Project-Related Work ExperienceGeorge Liddle
George Lee Liddle, III has experience with a variety of projects related to water quality, stormwater, and environmental site assessments. Some of his major projects include a TMDL diagnostic and restoration project in Upper San Marcos Creek Watershed in California, monitoring and sampling at a former oil refinery and metals recycling facility in National City, California, and municipal stormwater detention basin sampling in Poway, California. He has also conducted Phase I environmental site assessments for various sites in Mexico and projects involving brownfield redevelopment, aquatic pesticide application, and hazardous waste assessment.
DRBC Docket: XTO Energy Application to Withdraw Surface Water at Oquaga CreekMarcellus Drilling News
Delaware River Basin Commission - Hearing to review an application form XTO Energy to withdraw .25 million gallons of water per day from the Oquaga Creek in the Town of Sanford, NY for purposes of shale gas drilling exploration and production.
This document discusses using the MODFLOW groundwater model to evaluate the impact of artificial groundwater recharge in Abbid Sarbishe, Iran. A conceptual model of the study area was developed using hydrogeological data and discretized into a grid for use in MODFLOW. The model was calibrated and validated before using it to simulate different levels of artificial recharge. The results show that recharge has the greatest impact on piezometers closest to the recharge site, with water levels rising up to 2.25 meters. Western parts of the recharge site had a larger impact due to thinner unsaturated zones in the aquifer in that area.
The document provides details about a project to design a low-flow siphon for environmental releases below Pilarcitos Dam for the San Francisco Public Utility Commission. The current siphon does not operate well during low reservoir levels in warm months. The project team's objective is to optimize the current siphon's design for drought conditions by reducing head losses. The team considered modifying the current design, using a solar pump, or installing a siphon over the dam. Their final design includes a throttling device and lip seal to control water flow at low rates without frequent maintenance. Computer simulations and prototype testing supported that the new design can sustain siphon flow at rates from 0.5 to over 3 cubic feet per second.
1) The document discusses stormwater retrofit assessments (SRA) conducted by Metro Conservation Districts to identify the most cost-effective locations for installing stormwater best management practices (BMPs).
2) An SRA involves delineating subwatersheds and catchments, analyzing land use and soil data, identifying potential BMP locations, modeling BMP designs and pollutant reductions, and ranking catchments based on performance metrics like cost per pound of pollutant reduced.
3) The assessments help direct limited funding and labor resources to projects that provide the greatest water quality benefits, in support of total maximum daily load implementation plans.
This document summarizes the use of a packerless, multistage fracture stimulation method called pinpoint fracturing (PPF) in Argentina. Key points:
1) PPF has been used to complete 22 wells with 193 fractures since 2006, allowing more selective stimulation and aggressive fracturing treatments.
2) The method uses coiled tubing to hydrajet perforate intervals and pump fracturing fluid down the annulus, isolating stages with sand or bridge plugs.
3) A case study describes applying PPF across 9 wells with 90 stages, reducing completion times compared to conventional methods using packers.
Andy Malone is a Principal Geologist and Vice President at Wildermuth Environmental, Inc. with over 20 years of experience in water resources and geology. Some of his most significant projects include redefining groundwater sub-basin boundaries and water quality objectives for the Santa Ana River Watershed, developing a strategic plan for the Six Basins Watermaster to improve water resources management, and conducting studies on land subsidence in the Chino Basin. Currently, he is managing development of the strategic plan for the Six Basins Watermaster and evaluating project alternatives through computer modeling of physical impacts and cost analyses.
14 aneu applications of technological & engineering solutions edit Juan Carlos Bonapace
The document summarizes the application of technological solutions to stimulate an old vertical well (drilled in 1974) targeting the Vaca Muerta Formation in Neuquén Basin, Argentina. The objectives were to recondition the well using a swell packer and stimulate the entire Vaca Muerta section with 12 fracturing stages using pinpoint stimulation technique. Key steps included logging the well, setting a swell packer, and performing 12-stage fracturing of the Vaca Muerta formation using coiled tubing and a pinpoint technique to optimize stimulation of the target zone.
This document summarizes Juan Carlos Bonapace's presentation on proppant management challenges for developing unconventional reservoirs in Argentina. It discusses reservoir conditions, typical proppant types and amounts used, improvements to proppant supply logistics, laboratory testing of local Argentine sand as a potential proppant, and conclusions. Key points include closure stresses on proppant in Argentine reservoirs ranging from 1,000-5,000 psi, use of 3-4 mesh sizes and ceramic-sand blends for shales, potential for coating local sand to improve crush resistance for use at higher closure stresses, and cost-effective proppant alternatives being important to sustainable unconventional development.
The California Central Valley Groundwater-Surface Water Simulation Model (C2VSim) simulates the monthly response of the Central Valley’s groundwater and surface water flow system to historical stresses, and can also be used to simulate the response to projected future stresses. C2VSim contains monthly historical stream inflows, surface water diversions, precipitation, land use and crop acreages from October 1921 through September 2009. The model dynamically calculates crop water demands, allocates contributions from precipitation, soil moisture and surface water diversions, and calculates the groundwater pumpage required to meet the remaining demand.
This paper discusses optimization of hydrocarbon production in the Cerro Dragon oilfield in Argentina using latest formation evaluation and perforating technologies. It summarizes how nuclear magnetic resonance (NMR) logging helped identify different hydrocarbon types in reservoirs that conventional logs could not distinguish. A propellant-assisted perforating (PAP) method was proposed to optimize well productivity while maintaining safety. The PAP method uses oxidizer to create high pressures and mild fracturing near the wellbore. The paper focuses on applications of PAP in the San Jorge basin, including enhancing connectivity beyond damaged zones and near water contacts where hydraulic fracturing is not feasible.
This document summarizes an integrated surface water and groundwater model developed for the MacKay River watershed in Alberta, Canada to assess cumulative effects of oil sands operations on water resources. The model was calibrated against streamflow and groundwater level observations over a 38-year period. Key features included a 400m groundwater grid, 200m surface hydrology grid, representation of geology, climate inputs, vegetation/wetlands, and frozen ground processes. The calibrated model will be used to simulate current and future conditions to evaluate sustainability.
This document summarizes an integrated surface water and groundwater model developed for the MacKay River watershed in Alberta, Canada to assess cumulative effects of oil sands operations. The model was calibrated against streamflow and groundwater level observations over a 38-year period. Key features included a 400m groundwater grid, 200m surface hydrology grid, representation of geology and hydrostratigraphy with 17 layers, and simulation of lateral groundwater and surface water interactions, frozen ground processes, and feedback between surface water and groundwater systems. The calibrated model was used to evaluate sustainability of current and future water use from the watershed under different development scenarios.
This document summarizes a study that examined the impacts of climate change on urban stormwater best management practices (BMPs) in the Spokane River watershed. The study used a water quality model to simulate hydrology and water quality over a 10-year historic period and projected conditions for 2050 under climate change scenarios. The results indicated significantly higher streamflows during winter and spring months due to increased precipitation falling as rain rather than snow. Water temperatures and instances of dissolved oxygen levels below standards also increased. This implies that the currently proposed 50% reduction in nonpoint source nutrient loading through BMPs will not be adequate to meet water quality goals under future climate conditions, and that BMPs will need to be designed to handle larger storm
The document describes a proposed Monte Carlo framework for estimating design floods in the Brisbane River catchment in Australia. The framework would (1) generate synthetic flood events by sampling probabilities of factors like rainfall and reservoir levels, (2) use rainfall intensity data and spatial patterns to estimate rainfall for sub-catchments, (3) model runoff and routing through the catchment using a hydrological model, and (4) estimate flood levels, discharges and volumes at different locations and return periods through post-processing of model results. The framework aims to better represent the variability and interactions of all flood influencing factors compared to traditional methods.
journal of engineering and applied science 18.pdfnareshkotra
The International Journal of Mechanical Engineering Research and Technology is an international online journal in English published Quarterly offers a speed publication schedule with whilst maintaining rigorous peer review and the use of recommended electronic formats for article delivery of expedites the process of All submitted research articles are subjected to immediate rapid screening by the editors consultation with the Editorial Board or others working in the field as appropriate to ensure that they are as same as to be the level of interest and importance appropriate for the journal.
journal of applied science and engineering.pdfnareshkotra
The International Journal of Mechanical Engineering Research and Technology is an international online journal in English published Quarterly offers a fast publication schedule with maintaining rigorous peer review and the use of recommended electronic formats of article delivery expedites the process of All submitted research articles are subjected to immediate rapid screening by the editors consultation with the Editorial Board or others working in the field of appropriate to ensure that they are likely to be the level of interest and importance of appropriate for the journal.
Upstream Suburban Philadelphia Sub-Watershed Cluster Modeling OverviewKim Beidler
Upstream Suburban Philadelphia Sub-Watershed Cluster Modeling Overview by Jeffrey Featherstone, Ph.D., Director, Center for Sustainable Communities, Temple University
1) This project aims to improve water quality and agricultural productivity in the Lower Arkansas River Valley through participatory conservation planning and analysis.
2) Models are being used to identify effective conservation practices and river/reservoir operations that reduce salinity, selenium, and nutrients while complying with water law.
3) A stakeholder group provides input to researchers on viable solutions and helps disseminate findings to water users, agencies, and policymakers.
Reservoir Water Supply Planning for an Uncertain FutureDave Campbell
1) Reservoir water supply planning involves projecting future water demand over a 50-year planning period, which involves significant uncertainty. Factors like population growth, climate change, and regulatory requirements are difficult to predict that far in advance.
2) Reservoir projects take 10-20 years to plan, permit, design, and construct, so planning must start well in advance of anticipated need. However, deferring planning can significantly increase costs due to escalation rates for reservoir projects that exceed general inflation rates.
3) Reservoir configurations include on-stream reservoirs supplied by their own watershed, and pumped storage reservoirs that receive diverted flows from other streams to supplement their smaller watershed yield. Operating a reservoir for downstream flow augmentation
A REVIEW ON RESERVOIR SEDIMENTATION STUDIES USING SATELLITE REMOTE SENSING TE...ijiert bestjournal
Sedimentation in the reservoir gradually reduces it s storage capacity. By keeping a check on the sedimentation and by providing control measures for the same,the reservoir life can be maintained. Uj jani dam was constructed for irrigation,water supply an d power generation schemes. It lies in Solapur dist rict which is a drought prone area. This makes Ujjani a socially and economically significant project for t he state. In the present study,reservoir sedimentatio n for Ujjani reservoir is assessed for monitoring p urpose. Two techniques namely Satellite Remote Sensing Tech nique (SRST) and mathematical modeling using HEC RAS,were used in the study for estimating sedi mentation. Owing to advantages like low cost,time saving,less manpower requirement,accuracy in esti mation and capability of carrying out past surveys,the Satellite Remote Sensing Technique is gaining impor tance over the time consuming and high cost conventional hydrographic surveys. The water spread areas for different reservoir levels were delineat ed from the satellite images of Ujjain Reservoir using ARC GIS software. Volume between two water levels was calculated using prismoidul formula. The presen t volume of reservoir was compared with the initial volume during impoundment of reservoir. This gave t he loss of volume which was due to sedimentation.
SLIPP Water Quality Monitoring Plan 2012 WQ PAC Workshop 12-April-2012Erin Vieira
The 2012/13 Water Quality Monitoring Plan proposes the following:
1) Continuing deep station and littoral station monitoring, as well as algae bloom and periphyton studies.
2) Conducting joint sampling with Interior Health at sewage seepage sites and initiating a secchi project in Little Shuswap Lake.
3) Identifying characteristics of houseboats on Shuswap Lake like numbers, distribution, and typical greywater production and chemistry.
4) Finishing GIS land use mapping and continuing tributary monitoring to identify highest loading sources.
- The document summarizes modeling work done in the Choptank Watershed using the Hydrologic Simulation Program – Fortran (HSPF) and Generalized Water Loading Function (GWLF) models previously, as well as new modeling approaches.
- The new approach uses high resolution multi-sensor precipitation estimates and a gridded, spatially-distributed hydrologic model called the Research Distributed Hydrologic Model (RDHM) to simulate runoff at a higher resolution.
- RDHM outputs will be used as inputs to the Hydraulic Engineering Center – River Analysis System (HEC-RAS) model to simulate flows and stages throughout the river network.
- The goals are to support fertil
IRWP Seasonal Storage Project Water Reuse System Storage ModelAhmad Mousa
This document describes a storage planning model (SPM) developed to evaluate seasonal storage options for Santa Rosa's Subregional Water Reuse System under different future scenarios. The SPM was built using data from 2003-2006 and calibrated to the existing system operations. It then simulates seven storage pond configurations and five demand scenarios under varying hydrologic years. The results show the additional storage volume (200-650 million gallons) and potential facility upgrades needed to integrate additional ponds into the system.
The Development of a Catchment Management Modelling System for the Googong Re...GavanThomas
A scenario assessment model to assist the end-user in determining priorities for a series of agreed management prescriptions that can be enacted through controls on existing landuse
This document provides an overview and approach for revising the general permit for construction activities in California. It discusses moving towards a risk-based permit approach that establishes tiered implementation and monitoring requirements based on a project's sediment yield risk and the receiving water's sensitivity. A key goal is adopting a standard to avoid, minimize, and mitigate hydromodification impacts from new and redevelopment projects. Runoff reduction measures are also discussed as an option to address hydromodification impacts.
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1. Lower
Susquehanna
River
Watershed
Assessment
Update
Lower Susquehanna
Riverkeeper
Stewards of the
Lower Susquehanna
July 15, 2012
2. Assessment Initiation
Funding from Congress to “restart” study – May „09
Sediment Task Force Reconvened – Oct. ‟09
Scoping Kick-off meeting – June „10
Scoping completed – April „11.
Executed Project Management Plan/Cost-Sharing
Agreement – September „11
Federal funding of $250K secured – September „11
Team Kick-off meeting – November „11
4. Assessment Components
River Basin Assessment (Sec 729 of WRDA ‘86)
Cost: $1.4 million
Legal Cost-sharing sponsor: MDE
75 Federal/25 Non-Federal Cost Share
3 Years
5. Assessment Components
Identification of sediment management strategies (Dredging?
Innovative Re-use? By-passing? Alter Reservoir Operations?
Other?).
Use of models to link incoming sediment and associated nutrient
projections to in-reservoir processes at the hydroelectric dams.
Use of models to forecast effects of sediment management strategies
to living resources in Chesapeake Bay.
Integration of the MD, PA, NY Watershed Implementation Plans
(WIPs).
Concept-level designs and costs.
Will not lead directly to construction.
6. Lower Susquehanna River Watershed
Assessment
Mission
To comprehensively forecast and evaluate
sediment and associated nutrient loads to the
system of hydroelectric dams located on the
Susquehanna River above the Chesapeake Bay
and consider structural and non-structural
strategies to manage these loads to protect water
quality and aquatic life in the Chesapeake Bay.
7. Lower Susquehanna River Watershed Assessment
Goals & Objectives
1. Evaluate strategies to manage sediment and associated nutrient delivery to the
Chesapeake Bay.
Strategies will incorporate input from Maryland, New York, and
Pennsylvania TMDL WIPs.
Strategies will incorporate evaluations of sediment storage capacity at the
four hydroelectric dams on the Lower Susquehanna River.
Strategies will evaluate types of sediment delivered and associated effects
on the Chesapeake Bay.
2. Evaluate strategies to manage sediment and associated nutrients available for
transport during high flow storm events to reduce impacts to the Chesapeake
Bay.
3. Determine the effects to the Chesapeake Bay from the loss of sediment and
nutrient storage from behind the hydroelectric dams on the Lower
Susquehanna River.
8. Modeling Tools
1. CBP Partnership-Watershed Model
Sediment and nutrient loads from the watershed at key
locations into the reservoirs.
2. HEC-RAS 1D Model
Hydrologic conditions and sediment transport into
Conowingo Reservoir (from upper 2 reservoirs)
3. 2D Adaptive Hydraulics Model (ADH)
Erosion/deposition within Conowingo Reservoir
Sediment transport out of Conowingo reservoir
Response of reservoir and flats to various scenarios.
4. CBP Partnership - Chesapeake Bay Model
Impact of sediments and nutrients on light attenuation,
SAV, chlorophyll, and DO
9. Assessment Analysis Approach
2.)Sediment and 3.) Sediment
1.) 2D/3D effects nutrient loads from loads divided into
desktop analysis Lower Susquehanna grain size
plus building initial Watershed into fractions and
model mesh reservoirs routed through
Lake Clark and
Aldred
2D ADH model CBP Partnership
Watershed Model 1D HEC-RAS
ERDC-$45K model
EPA
USGS-$80K
6.) Change in total 4.) Sediment load by
sediment load by grain grain size routed
7.) Impacts of through Conowingo
altered sediment size passing
Conowingo and Reservoir, Dam, and
and associated 5.) Run the Susquehanna
nutrient loads on Susquehanna flats selected Flats
Bay modeling
CBP Partnership scenarios
2D ADH model
Bay Model ERDC/USGS 2D ADH model
ERDC-(Costs included /EPA
$235.1K in Step 4) ERDC-$270K
11. Prospective Modeling Scenarios
1. Base Condition –
WQ/sediment accumulation rate under existing conditions.
2. Watershed Management –
WQ/sediment accumulation rate after implementation of TMDL’s.
3. What Happens when the Reservoir Fills –
Impact on WQ/sediment accumulation rate to the Bay (assume TMDL’s are being met).
4. Effect of Scouring during Winter/Spring Runoff –
WQ/sediment accumulation rate with scouring of the bottom of a full reservoir (utilize Jan
‘96 event).
5. Effect of Scouring from a Tropical Storm –
Same as Scenario 4 except event will occur in summer (substitute the Jan ‘96 event).
6. Reservoir Bypass –
Impacts on WQ/sediment accumulation rates with a system bypassing sediment from
behind Conowingo to below the dam.
7. Reservoir Strategic Dredging –
WQ/sediment accumulation rate impacts from dredging fines in potentially any reservoir.
8. Modify Dam Operations –
Effects of altering the flow and/or the way the Conowingo is currently operated..
12. Assessment Timeline
2D/3D Field & Lab
Study Sampling/
Analysis
Project
Build Agency
Team
Models/Run Reporting Review
Review
Scenarios
START COMPLETE
STUDY STUDY
USACE USACE
Review Compare Agency Higher
Results Alternatives Technical Authority
Review Review
Agency/Public Involvement
14. Conowingo Reservoir: Is 2D
Modeling Adequate or Are 3D Effects
Potentially Significant?
► 2D ADH model Assumption: System is well mixed therefore
2D model is appropriate for all conditions that deliver
significant sediment.
► When are 3D Effects Important?
• Low river discharge into reservoir
• Flow velocity is low; turbulence and mixing at a minimum
• High water residence time in reservoir
15. Desktop Analysis of 3D Effects
► Purpose: Evaluate if 2D ADH model can adequately simulate long-term
sedimentation processes in Conowingo Reservoir or will 3D
effects significantly impact 2D simulations.
► Approach: Evaluate sediment availability to reservoir when 3D
impacts may be significant
1. Conduct a desktop analysis of sediment transport/hydrologic
conditions. Utilize existing data:
a) Residence time curve (Exelon hydrologic data)
b) Flow (USGS historical data)
c) Sediment rating curve (1D HEC-RAS model)
2. Assume that flows greater than 30,000 cubic feet per second (cfs)
have a very low retention time (5 days or less); therefore, there is
sufficient mixing at these low flows (i.e., no 3D effects).
3. Based on analysis, determine if a 2D model is appropriate to
simulating sediment transport in Conowingo Reservoir.
16. Desktop Analysis of 3D Effects
Results
Of ~4.28 million tons of annual sediment inflow, ~.22
million occurs during flows of 30,000 cfs or less (5%).
Reservoir is exposed to only 5% of total yearly load
during low flow conditions
This means 3D effects occur, but are negligible.
A 2D model is appropriate for simulating sediment
transport in Conowingo Reservoir.
17. 2D ADH Model Development – ERDC lead
One model for Conowingo Reservoir and
one model for the flats
Includes:
► 2008 bathymetric surveys
► Routines for power plant operations and flood
gates
► SAV effects (impacts how sediment is
transported in the flats) included
18. 1D HEC-RAS Model Development – USGS Lead
Marietta gage - Conowingo
Reservoir
LIDAR data
Bathymetry (‟96 and „08)
Flood insurance data from
FEMA used to fill in where
bathymetry data was not
available
4 sediment transport curves
(ranking flow with sediment
concentration values)
Operational – Sept. 2012
19. Chesapeake Bay Environmental Model Package
ERDC Lead
Data Search
CBEMP requires information on physical properties and
composition of solids flowing over Conowingo Dam.
Search of relevant data conducted
► Solids size distribution
► C, N, P species and concentrations
► Metals
Findings:
► As flow over Conowingo increases, composition of
transported materials resembles reservoir bed material
► Existing data is sufficient to characterize transported
material for modeling.
20. SEDFlume Data and Analysis
15 sediment cores were collected in April
2012 in Conowingo Reservoir and run
through SEDflume
Analysis will determine erodability of
sediments.
Equations for critical shear stress
21. Suspended Sediment Sampling
USGS collected suspended sediments at Conowingo dam during
several 2010 high flow events (March/October/December 2010) and
during Tropical Storm Lee (September 2011).
► Supplemental to regular monitoring
► Suspended-sediment chemistry
► Grain-size analysis
Data provides
► C, N, P particle size distribution; will help determine what grain
size each is associated with.
► Measures of Particulate P with Fe and Mn to determine if P is
organic or associated with Fe and Mn (i.e. inorganic).
Data here: http://waterdata.usgs.gov/nwis
22. Susquehanna Flats
Sediment Sampling
MGS collected
surficial grab
samples in May
2012
Grain-size analysis
Data will refine 2D
ADH model
23. Conowingo Reservoir
Sediment Sampling
USGS
collected grab
surface sample
sediment in
June 2012
96-99% sand in
upper reservoir
24. Exelon Conowingo Bathymetry Surveys
3,434 acre-ft (~5.07 million tons) of sediment accumulated from ‟08-‟11
Average of 1.69 million tons of deposition annually.
Remaining sediment storage capacity: ~21,800 acre-ft (assume 142,000
acre-ft is steady-state volume.
Historic Coverage 2011 Coverage
25. Stakeholder Outreach
Study Initiation Notice Feb 2012
Agency Coordination Letters Feb 2012
Facebook Page:
http://www.facebook.com/pages/Lower-Susquehanna-
River-Watershed-Assessment/359608094092593
LSRWA Website:
http://mddnr.chesapeakebay.net/LSRWA/index.cfm
Stakeholder Involvement Plan
Quarterly Email updates
Provide updates at other Chesapeake Bay
Meetings
26. Schedule of Upcoming Activities *
Complete Initial HEC-RAS Hydraulic Model Ongoing-Sept 2012
Sediment Characterization (SEDFlume) Mar-Sept 2012
Literature Search July-Sept 2012
Hydrodynamics Model Runs April-Sept 2012
Modeling of Baseline Condition October 2012
Alternative Identification and Site Evaluation Oct-Dec 2012
Modeling of Alternatives Jan-Mar 2013
Sediment Management Strategy Development Summer 2013
* The schedule for activities after September 2012 is contingent upon receiving
adequate Federal funding in FY13.
Editor's Notes
Federal funding received in May 2009 to restart and scope studyIssue of the long-term buildup of sediment behind the dams in the lower Susquehanna and the implications of these sediments and associated nutrients to the Chesapeake Bay
Sediment Task Force organized in 1999 by SRBC.Reconvened in Oct 09 – with 43 attendees representing federal and state agencies, private companies, NGOs, Universities with expertise (20 groups)Federal Sponsor- USACE Non-Federal Sponsor(s)- Maryland (MDE, DNR, MGS) contributing partners (SRBC, TNC, USGS)
River basin assessment (Sec 729 of WRDA 1986): What can we do to reduce problem? Where should work be done? Variety of recommendations implemented by different entities.
CBP- WSM model-Same model used for TMDL’s; POC is EPA; however UMD may run scenarios. Partnership includes, Several Federal and state agencies and NGO’s and private partners.HEC-RAS-USGS will route sediment through upper 2 reservoirs providing boundary conditions for 2D ADH model. Chesapeake Bay Modelcomputes water quality and living resources in the bay system;
1D modeling tasks for 75k: Build HECRAS models for Lake Clark and Lake Aldred; validate models to selected events; provide sediment loads to 2D model for 2D modeling simulations2D modeling tasks for 335k: Determine erodibility of Conowingo sediments with the Sedflume (120K); build 2D model of Conowingo Reservoir and lower channel to Susquehanna Flats; perform simulations (215k)
the fate of these sediments may be significantly influenced by these 3D effects
the fate of these sediments may be significantly influenced by these 3D effects
Routines- Flows less than 86,000 cfs are routed through the power plant, while the flood gates open at higher flows. When flows reach as high as 400,000 cfs, the power plant no longer functions for flow passage i.e. sediment is scoured.
Sediment Transport Curves are in Marietta, Conestoga River, Pequea Creek, and Conowingo.
Metals affect nutrient digenesis in bed sediments.
.
USGS data provides particulate C, N, P at extremely high flows. These are not available in the regular monitoring data base. These particle concentrations will aid in specification of loads to Chesapeake Bay during high-flow scenarios. USGS data provides both C, N, P and particle size distribution. This will help us determine what particle classes the C, N, P are associated with (e.g. clay or silt or ??). USGS data provide simultaneous measures of particulate P with Fe and Mn. This will help us determine the nature of the particulate P. Is it organic or associated with Fe and Mn? We can then map particulate P into the appropriate water quality model variable (particulate organic or particulate inorganic phosphorus).
Survey results support USGS hypothesis that upper and middle portions of Conowingo have reached dynamic equilibrium, where long-term sediment inflow approximately equals long-term sedimetnoutlfow. Zone of dynamic equilibrium has expanded farther downstream than in previous surveys (~3.7 miles upstream of Conowingo Dam).2008-2011 cross section comparisons indicated that there was local scour in portions of the reservoir's lower cross-sections. Amount of deposition, exceeded the amount of scour. Unclear where re-suspended sediment was transported too.Deposition prior to TS Lee is unknown, the flood’s sediment profile impacts cannot be directly assessed. Conowingo pond volume of water was calculated to have decreased between 2,940 acre-feet and 3,434 acre-ft from 2008-2011 or between 980 acre-ft per year and 1145 per year. This corresponds to a total sediment deposition of 4.34 million tons to 5.07 million tons, or a rate of 1.45 million tons per year to 1.69 million tones per year, matching historic depostion rates.
USACE had sent out standard study coordination letters to various Federal and state environmental resource agencies .As a result of this coordination, we have added several new agency team members, some of whom attended or listened into the quarterly team meeting. USACE sent out a Study Initiation Notice via email to large email distribution list that started with the original Sediment Task Force (includes academia, general public, federal, non-government organizations, and state and county reps. DNR hosts public website