Presentation by Julien Groenenboom (Deltares) at the Seminar Models and decision-making in the wake of climate uncertainties, during the Deltares Software Days South-East Asia 2023. Wednesday, 22 February 2023, Singapore.
DSD-INT 2022 Upcoming Delft3D FM Suite 2023.01 New features + Improvements - ...Deltares
Presentation by Rob Prevel and Arthur van Dam (Deltares, Netherlands), at the Delft3D User Days, during Delft Software Days - Edition 2022. Tuesday, 15 November 2022.
Hec ras flood modeling little river newburyportWilliam Mullen
This document describes a HEC-RAS 2D flood modeling case study of the Little River in Newburyport and Newbury, Massachusetts. It summarizes the advantages of 2D modeling, details the HEC-RAS model setup including terrain and hydrologic inputs, and presents calibration results from a historic 2006 rainfall event. Next steps include running additional storm simulations and using the model to evaluate potential flood mitigation measures under future sea level and climate change scenarios.
This document discusses key properties and concepts related to aquifers and groundwater flow. It defines terms like porosity, permeability, hydraulic conductivity, specific yield, and water table. It describes different types of aquifers such as unconfined, confined, and perched aquifers. Pumping from confined aquifers can create a cone of depression. Storativity describes how much water an aquifer can gain or lose from storage. Aquifer units can be homogeneous, heterogeneous, isotropic, or anisotropic depending on their properties.
This document discusses applications of remote sensing and modeling for flood risk analysis and irrigation water management. It identifies global flood hotspots, particularly in Asia, and quantifies associated economic and human losses. Products including 8-day flood inundation maps of South Asia at 500m resolution from 2000-2011 are presented. Successful operational flood mapping and forecasting systems developed for the Gash Delta region of Sudan using MODIS and Landsat imagery, biomass modeling, and HEC modeling tools like HMS and RAS are summarized. The systems provide weekly flood maps and crop/irrigation performance updates to help farmers manage land and water resources.
Getting Started with ThousandEyes Proof of ConceptsThousandEyes
This document outlines the process for conducting a proof of concept (PoC) using ThousandEyes, which provides internet and cloud monitoring. It begins with an overview and agenda. It then discusses identifying opportunities by qualifying customer problems and priorities. Success criteria for the PoC are defined, such as improving visibility, reducing troubleshooting time, and proactive monitoring. The execution process is explained, including installing agents, creating tests, building dashboards, and continuous monitoring. A demo is provided, followed by resources and next steps. The overall goal of the PoC is to demonstrate ThousandEyes' business value for the customer in addressing their specific needs.
seminar report of " Introduction to HEC RAS "ankit jain
This document provides an overview of the capabilities of the Hydrologic Engineering Center's River Analysis System (HEC-RAS) software. HEC-RAS allows for one-dimensional steady and unsteady flow river hydraulics calculations, sediment transport modeling, and water temperature analysis. The software includes components for steady flow water surface profiles, unsteady flow simulation, sediment transport, and water quality analysis. It also features a graphical user interface, data management capabilities, and reporting tools. The seminar report discusses HEC-RAS functionality in more detail.
This document discusses highway drainage systems. It defines highway drainage as the process of intercepting and removing water from roads. Surface drainage systems use drains, culverts, and bridges to divert water away from roads. Subsurface drainage systems use drains to lower the water table and control seepage and capillary rise beneath roads to improve subgrade soil strength. Proper drainage is important to prevent issues like road damage, erosion, and decreased load-bearing capacity.
DSD-INT 2022 Upcoming Delft3D FM Suite 2023.01 New features + Improvements - ...Deltares
Presentation by Rob Prevel and Arthur van Dam (Deltares, Netherlands), at the Delft3D User Days, during Delft Software Days - Edition 2022. Tuesday, 15 November 2022.
Hec ras flood modeling little river newburyportWilliam Mullen
This document describes a HEC-RAS 2D flood modeling case study of the Little River in Newburyport and Newbury, Massachusetts. It summarizes the advantages of 2D modeling, details the HEC-RAS model setup including terrain and hydrologic inputs, and presents calibration results from a historic 2006 rainfall event. Next steps include running additional storm simulations and using the model to evaluate potential flood mitigation measures under future sea level and climate change scenarios.
This document discusses key properties and concepts related to aquifers and groundwater flow. It defines terms like porosity, permeability, hydraulic conductivity, specific yield, and water table. It describes different types of aquifers such as unconfined, confined, and perched aquifers. Pumping from confined aquifers can create a cone of depression. Storativity describes how much water an aquifer can gain or lose from storage. Aquifer units can be homogeneous, heterogeneous, isotropic, or anisotropic depending on their properties.
This document discusses applications of remote sensing and modeling for flood risk analysis and irrigation water management. It identifies global flood hotspots, particularly in Asia, and quantifies associated economic and human losses. Products including 8-day flood inundation maps of South Asia at 500m resolution from 2000-2011 are presented. Successful operational flood mapping and forecasting systems developed for the Gash Delta region of Sudan using MODIS and Landsat imagery, biomass modeling, and HEC modeling tools like HMS and RAS are summarized. The systems provide weekly flood maps and crop/irrigation performance updates to help farmers manage land and water resources.
Getting Started with ThousandEyes Proof of ConceptsThousandEyes
This document outlines the process for conducting a proof of concept (PoC) using ThousandEyes, which provides internet and cloud monitoring. It begins with an overview and agenda. It then discusses identifying opportunities by qualifying customer problems and priorities. Success criteria for the PoC are defined, such as improving visibility, reducing troubleshooting time, and proactive monitoring. The execution process is explained, including installing agents, creating tests, building dashboards, and continuous monitoring. A demo is provided, followed by resources and next steps. The overall goal of the PoC is to demonstrate ThousandEyes' business value for the customer in addressing their specific needs.
seminar report of " Introduction to HEC RAS "ankit jain
This document provides an overview of the capabilities of the Hydrologic Engineering Center's River Analysis System (HEC-RAS) software. HEC-RAS allows for one-dimensional steady and unsteady flow river hydraulics calculations, sediment transport modeling, and water temperature analysis. The software includes components for steady flow water surface profiles, unsteady flow simulation, sediment transport, and water quality analysis. It also features a graphical user interface, data management capabilities, and reporting tools. The seminar report discusses HEC-RAS functionality in more detail.
This document discusses highway drainage systems. It defines highway drainage as the process of intercepting and removing water from roads. Surface drainage systems use drains, culverts, and bridges to divert water away from roads. Subsurface drainage systems use drains to lower the water table and control seepage and capillary rise beneath roads to improve subgrade soil strength. Proper drainage is important to prevent issues like road damage, erosion, and decreased load-bearing capacity.
This document provides an introduction to 1D, 2D, and coupled 1D-2D flood modeling. It discusses the differences between model types in terms of data requirements, preprocessing, setup, and output. 1D models are suitable when flow is primarily uni-directional, while 2D models are needed when flow spreads widely. Coupled 1D-2D models represent the channel in 1D and overflow areas in 2D, avoiding the need for a fine mesh in the channel. The document provides guidelines for selecting a 1D, 2D or coupled model based on study area characteristics.
DSD-INT 2019 Delft3D FM model for Hong Kong-GroenenboomDeltares
Presentation by Julien Groenenboom, Deltares, at the Delft3D - User Days (Day 2: Hydrodynamics), during Delft Software Days - Edition 2019. Tuesday, 12 November 2019, Delft.
This document discusses reservoir sedimentation and methods for managing sediment in reservoirs. It begins by describing physical processes in watersheds like weathering, erosion, and sediment yield. Methods for estimating sediment yield in a watershed are then presented. The document outlines three forms of sediment transport in rivers and describes depositional zones in reservoirs. Consequences of reservoir sedimentation include loss of storage capacity. Elements of sediment management include reducing sediment inflow, routing sediments, removal of deposited sediments, providing large storage volumes, and sediment placement. Case studies on sediment routing at the Three Gorges Dam and the Sanmenxia Key Water Control Project in China are also summarized.
The document describes WEAP (Water Evaluation and Planning), a water resources planning model. It provides an overview of WEAP's features and capabilities for integrated water resources management. These include built-in models, a model-building interface, reporting tools, and a GIS-based graphical user interface. The document then presents a case study application of WEAP for the Langat River Basin in Malaysia to investigate water supply and demand trends and assess water availability under future scenarios. The WEAP model developed for the basin was calibrated and validated and able to reasonably simulate streamflows. Modeling results show increasing future water deficits without intervention and the benefits of demand management and reduction of non-revenue water losses.
This presentation summarizes a case study on riverbank erosion hazards and vulnerabilities in Sirajganj District, Bangladesh. It introduces the topic by explaining the importance of rivers and defining erosion. It then outlines some of the key problems caused by erosion, including demographic impacts, economic issues, and biodiversity loss. The presentation reviews relevant literature on erosion impacts and sediment discharge patterns in the Jamuna River. It describes the study area of Sirajganj District and methodology used, which includes primary data collection through surveys and observations and secondary data analysis. Finally, it lists the possible outcomes of the study, such as identifying ways to reduce erosion, determining factors influencing erosion rates, and reviewing policies related to erosion.
1. Deltas form where rivers enter bodies of standing water, depositing large amounts of sediment. They are common features where large rivers meet the ocean.
2. Deltas consist of a delta plain, delta front, and prodelta. The delta plain is the subaerial region with distributary channels, the delta front is the shallow underwater region where mouth bars form, and the prodelta is the deepest region where fine sediments settle out.
3. Deltas are classified based on dominant hydrodynamic processes, including river-dominated, tide-dominated, and wave-dominated deltas which have characteristic morphologies and sedimentary structures.
This presentation summarizes saltwater intrusion in coastal aquifers. Saltwater intrusion occurs when saline water displaces or mixes with freshwater in an aquifer, usually due to groundwater pumping from coastal wells. Saltwater intrusion is influenced by tidal fluctuations, climate changes, sea level rise, excessive freshwater consumption, lack of rainfall, and human activities like agriculture and pumping. Impacts of saltwater intrusion include contamination of freshwater aquifers and decreased agricultural production and drinking water. Proposed remedies include managed aquifer recharge, reducing freshwater usage near coasts, and installing subsurface barriers to control the flow of saltwater.
The document discusses integrated river basin management and decision support systems for river basins. It outlines factors to consider for river basin management like ecological flow, drinking water, hydropower, recreation, and nutrient and discharge management. It provides examples of decision support systems developed for the Beaufort River, Savannah River, and Pee Dee River that allow for scenario analysis, simulation, and optimization of river resources through interactive graphics and controls. It also mentions a single site monitoring project.
This document provides summaries of several hydrology and water resources software programs. It describes FlowMaster as a hydraulic toolbox that enables engineers to design and analyze a wide variety of hydraulic elements. It then summarizes the capabilities of related software including SewerCAD for sanitary sewer modeling, SewerGEMS for sewer system management, StormCAD for storm sewer analysis and design, CivilStorm and PondPack for stormwater system analysis, and reservoir simulation tools like BOAST, MRST, and OPM. Finally, it briefly outlines the purposes of additional general and statistics software and surface water programs.
Surface water monitoring that how we do and what are the most objectives, methodology and scope that are in this ppt and it is very important for monitor a surface water that are shown in it
This document provides an introduction to flood modeling. It discusses the different types of floods including river/fluvial floods caused by excessive rainfall, pluvial/surface floods from heavy urban rainfall, and coastal floods from extreme tidal conditions. It also describes how flood risk analysis uses modeling to support insurance schemes, simulate historical flood patterns, define risk zones and critical rainfall thresholds. The document outlines principal modeling approaches including hydrological models of water movement, hydraulic models of river/canal flow, and hydrodynamic models that simulate river flow in 2D or 3D. It discusses using decision support systems to manage data and models for planning and real-time applications like flood forecasting and early warning systems. Finally, it notes challenges like obtaining
Flood plain zoning divides flood-prone areas into zones to restrict development based on flood risk. It aims to protect life and property by limiting construction in the most frequently flooded prohibitive zone, directing development in the less frequent restrictive zone, and demarcating rare flooding in the warning zone. Flood plain zoning is a non-structural flood mitigation measure that reduces flooding risks and impacts by restricting encroachment and directing development to be less susceptible to damage.
The Decision Support System for IWRM in the Citarum River BasinOswar Mungkasa
The document discusses the development of a decision support system (DSS) for integrated water resources management in the Citarum River Basin in Indonesia. The Citarum River Basin faces challenges of meeting the water needs of over 2.5 million inhabitants while allocating water for irrigation, hydropower, and other uses. The DSS being created will integrate hydrological, water allocation, and water quality models with spatial data and real-time sensor data. It is hoped that the DSS will help water managers more effectively operate the cascade reservoir system and allocate limited water resources.
This document provides an outline for a course on river engineering. It discusses river characteristics, hydraulics, morphology, sediment transport mechanisms, bed load calculation methods, sediment sampling, river training works, erosion protection, discharge control, and flow forecasting. Ethiopian rivers are described as having high seasonal flow variability due to the country's highlands and marked seasonality of rainfall. Common sediment transport mechanisms include bed load, suspended load, and wash load. Methods for calculating bed load transport rates include equations developed by Nielsen and van Rijn.
This document discusses real-time flood forecasting in India. It provides background on real-time flood forecasting systems and the need for them to issue flood warnings. It then describes flood problems in India, the different river basins that experience flooding, and special flood challenges. The document outlines the development of flood forecasting in India and types of flood warnings. It details the techniques, working procedures, features, sensors, and conclusion of real-time flood forecasting systems used to collect rainfall and water level data across river basins to predict floods.
Planning of Water Resource Planning ProjectsDARSHAN MEHTA
This document provides an overview of a lecture on river valley development projects and water resource planning projects. It discusses multipurpose river valley projects, which aim to meet multiple objectives like irrigation, electricity, flood control, and more. The key steps in planning such projects are stated as preparing inventories, collecting data, formulating projects and alternatives, evaluating projects, and considering environmental impacts. Functional requirements, merits and demerits of multipurpose projects are outlined. Methods of estimating benefit-cost ratios are also summarized. The Sardar Sarovar Dam project is presented as a case study of one of India's most productive multipurpose projects.
1) Groundwater management involves strategies for sustainably using groundwater resources, including artificial recharge, varying pumping amounts and locations over time, and connecting groundwater and surface water sources.
2) Key aspects of groundwater management include artificial recharge, which increases groundwater levels through direct or indirect methods. Indirect methods involve pumping near surface water sources to induce infiltration, while direct methods transport surface water long distances to recharge aquifers.
3) Determining a groundwater basin's safe yield, or maximum sustainable extraction rate, is difficult as it depends on climate, geology, and subjective factors like environmental and legal constraints. Artificial recharge can increase the safe yield by replenishing groundwater at
1. Canal escapes are side channels that remove surplus water from irrigation channels to prevent damage from overtopping or leaks. They provide a safety valve and are essential for repair and maintenance.
2. There are three main types of escapes - surplus, tail, and scouring escapes - which serve different drainage purposes along canals.
3. Head and cross regulators are structures that control water flow between main canals and off-taking channels. Head regulators meter water entry while cross regulators feed off-taking canals and allow canal breaches to close downstream.
This document discusses dam safety design and provides information on various topics related to dam engineering. It begins with an introduction to dam safety systems and monitoring. It then discusses the structure, types, and failures of dams. The main types of dams covered are gravity dams, buttress dams, arch dams, and earth dams. The document also addresses dam safety program implementation and development, roles and responsibilities, and guidelines.
The document discusses ocean waves, including how surfers care about breaking wave height to determine the best places to surf. It explains that breaking wave height depends on water depth and can be calculated using formulas involving wave height and period as well as water depth. The document provides resources for learning more about ocean waves and their properties.
This document describes a CFD model developed to simulate circulation patterns and temperature distribution in Lake Binaba, a small and shallow reservoir in Ghana. The model aims to predict heat storage and evaporation. It uses OpenFOAM to solve equations of motion and heat transfer over the lake's complex bathymetry under wind and atmospheric conditions. Results show velocities, heat fluxes at the surface, temperature profiles, and total heat storage over time. The CFD model provides a valuable tool for understanding small and shallow lakes.
This document discusses the design and analysis of cooling towers. It begins with a brief history of cooling tower design and the development of theories to analyze them. It then discusses key parameters that describe cooling tower performance such as range, approach, and water/air ratio. The document outlines methods for analyzing cooling tower performance, including the Merkel method and global conservation equations. It also discusses factors that affect heat transfer in cooling towers and how tower characteristics are determined. Finally, it covers other important design considerations like pressure drops, fan power requirements, and water losses through evaporation and drift.
This document provides an introduction to 1D, 2D, and coupled 1D-2D flood modeling. It discusses the differences between model types in terms of data requirements, preprocessing, setup, and output. 1D models are suitable when flow is primarily uni-directional, while 2D models are needed when flow spreads widely. Coupled 1D-2D models represent the channel in 1D and overflow areas in 2D, avoiding the need for a fine mesh in the channel. The document provides guidelines for selecting a 1D, 2D or coupled model based on study area characteristics.
DSD-INT 2019 Delft3D FM model for Hong Kong-GroenenboomDeltares
Presentation by Julien Groenenboom, Deltares, at the Delft3D - User Days (Day 2: Hydrodynamics), during Delft Software Days - Edition 2019. Tuesday, 12 November 2019, Delft.
This document discusses reservoir sedimentation and methods for managing sediment in reservoirs. It begins by describing physical processes in watersheds like weathering, erosion, and sediment yield. Methods for estimating sediment yield in a watershed are then presented. The document outlines three forms of sediment transport in rivers and describes depositional zones in reservoirs. Consequences of reservoir sedimentation include loss of storage capacity. Elements of sediment management include reducing sediment inflow, routing sediments, removal of deposited sediments, providing large storage volumes, and sediment placement. Case studies on sediment routing at the Three Gorges Dam and the Sanmenxia Key Water Control Project in China are also summarized.
The document describes WEAP (Water Evaluation and Planning), a water resources planning model. It provides an overview of WEAP's features and capabilities for integrated water resources management. These include built-in models, a model-building interface, reporting tools, and a GIS-based graphical user interface. The document then presents a case study application of WEAP for the Langat River Basin in Malaysia to investigate water supply and demand trends and assess water availability under future scenarios. The WEAP model developed for the basin was calibrated and validated and able to reasonably simulate streamflows. Modeling results show increasing future water deficits without intervention and the benefits of demand management and reduction of non-revenue water losses.
This presentation summarizes a case study on riverbank erosion hazards and vulnerabilities in Sirajganj District, Bangladesh. It introduces the topic by explaining the importance of rivers and defining erosion. It then outlines some of the key problems caused by erosion, including demographic impacts, economic issues, and biodiversity loss. The presentation reviews relevant literature on erosion impacts and sediment discharge patterns in the Jamuna River. It describes the study area of Sirajganj District and methodology used, which includes primary data collection through surveys and observations and secondary data analysis. Finally, it lists the possible outcomes of the study, such as identifying ways to reduce erosion, determining factors influencing erosion rates, and reviewing policies related to erosion.
1. Deltas form where rivers enter bodies of standing water, depositing large amounts of sediment. They are common features where large rivers meet the ocean.
2. Deltas consist of a delta plain, delta front, and prodelta. The delta plain is the subaerial region with distributary channels, the delta front is the shallow underwater region where mouth bars form, and the prodelta is the deepest region where fine sediments settle out.
3. Deltas are classified based on dominant hydrodynamic processes, including river-dominated, tide-dominated, and wave-dominated deltas which have characteristic morphologies and sedimentary structures.
This presentation summarizes saltwater intrusion in coastal aquifers. Saltwater intrusion occurs when saline water displaces or mixes with freshwater in an aquifer, usually due to groundwater pumping from coastal wells. Saltwater intrusion is influenced by tidal fluctuations, climate changes, sea level rise, excessive freshwater consumption, lack of rainfall, and human activities like agriculture and pumping. Impacts of saltwater intrusion include contamination of freshwater aquifers and decreased agricultural production and drinking water. Proposed remedies include managed aquifer recharge, reducing freshwater usage near coasts, and installing subsurface barriers to control the flow of saltwater.
The document discusses integrated river basin management and decision support systems for river basins. It outlines factors to consider for river basin management like ecological flow, drinking water, hydropower, recreation, and nutrient and discharge management. It provides examples of decision support systems developed for the Beaufort River, Savannah River, and Pee Dee River that allow for scenario analysis, simulation, and optimization of river resources through interactive graphics and controls. It also mentions a single site monitoring project.
This document provides summaries of several hydrology and water resources software programs. It describes FlowMaster as a hydraulic toolbox that enables engineers to design and analyze a wide variety of hydraulic elements. It then summarizes the capabilities of related software including SewerCAD for sanitary sewer modeling, SewerGEMS for sewer system management, StormCAD for storm sewer analysis and design, CivilStorm and PondPack for stormwater system analysis, and reservoir simulation tools like BOAST, MRST, and OPM. Finally, it briefly outlines the purposes of additional general and statistics software and surface water programs.
Surface water monitoring that how we do and what are the most objectives, methodology and scope that are in this ppt and it is very important for monitor a surface water that are shown in it
This document provides an introduction to flood modeling. It discusses the different types of floods including river/fluvial floods caused by excessive rainfall, pluvial/surface floods from heavy urban rainfall, and coastal floods from extreme tidal conditions. It also describes how flood risk analysis uses modeling to support insurance schemes, simulate historical flood patterns, define risk zones and critical rainfall thresholds. The document outlines principal modeling approaches including hydrological models of water movement, hydraulic models of river/canal flow, and hydrodynamic models that simulate river flow in 2D or 3D. It discusses using decision support systems to manage data and models for planning and real-time applications like flood forecasting and early warning systems. Finally, it notes challenges like obtaining
Flood plain zoning divides flood-prone areas into zones to restrict development based on flood risk. It aims to protect life and property by limiting construction in the most frequently flooded prohibitive zone, directing development in the less frequent restrictive zone, and demarcating rare flooding in the warning zone. Flood plain zoning is a non-structural flood mitigation measure that reduces flooding risks and impacts by restricting encroachment and directing development to be less susceptible to damage.
The Decision Support System for IWRM in the Citarum River BasinOswar Mungkasa
The document discusses the development of a decision support system (DSS) for integrated water resources management in the Citarum River Basin in Indonesia. The Citarum River Basin faces challenges of meeting the water needs of over 2.5 million inhabitants while allocating water for irrigation, hydropower, and other uses. The DSS being created will integrate hydrological, water allocation, and water quality models with spatial data and real-time sensor data. It is hoped that the DSS will help water managers more effectively operate the cascade reservoir system and allocate limited water resources.
This document provides an outline for a course on river engineering. It discusses river characteristics, hydraulics, morphology, sediment transport mechanisms, bed load calculation methods, sediment sampling, river training works, erosion protection, discharge control, and flow forecasting. Ethiopian rivers are described as having high seasonal flow variability due to the country's highlands and marked seasonality of rainfall. Common sediment transport mechanisms include bed load, suspended load, and wash load. Methods for calculating bed load transport rates include equations developed by Nielsen and van Rijn.
This document discusses real-time flood forecasting in India. It provides background on real-time flood forecasting systems and the need for them to issue flood warnings. It then describes flood problems in India, the different river basins that experience flooding, and special flood challenges. The document outlines the development of flood forecasting in India and types of flood warnings. It details the techniques, working procedures, features, sensors, and conclusion of real-time flood forecasting systems used to collect rainfall and water level data across river basins to predict floods.
Planning of Water Resource Planning ProjectsDARSHAN MEHTA
This document provides an overview of a lecture on river valley development projects and water resource planning projects. It discusses multipurpose river valley projects, which aim to meet multiple objectives like irrigation, electricity, flood control, and more. The key steps in planning such projects are stated as preparing inventories, collecting data, formulating projects and alternatives, evaluating projects, and considering environmental impacts. Functional requirements, merits and demerits of multipurpose projects are outlined. Methods of estimating benefit-cost ratios are also summarized. The Sardar Sarovar Dam project is presented as a case study of one of India's most productive multipurpose projects.
1) Groundwater management involves strategies for sustainably using groundwater resources, including artificial recharge, varying pumping amounts and locations over time, and connecting groundwater and surface water sources.
2) Key aspects of groundwater management include artificial recharge, which increases groundwater levels through direct or indirect methods. Indirect methods involve pumping near surface water sources to induce infiltration, while direct methods transport surface water long distances to recharge aquifers.
3) Determining a groundwater basin's safe yield, or maximum sustainable extraction rate, is difficult as it depends on climate, geology, and subjective factors like environmental and legal constraints. Artificial recharge can increase the safe yield by replenishing groundwater at
1. Canal escapes are side channels that remove surplus water from irrigation channels to prevent damage from overtopping or leaks. They provide a safety valve and are essential for repair and maintenance.
2. There are three main types of escapes - surplus, tail, and scouring escapes - which serve different drainage purposes along canals.
3. Head and cross regulators are structures that control water flow between main canals and off-taking channels. Head regulators meter water entry while cross regulators feed off-taking canals and allow canal breaches to close downstream.
This document discusses dam safety design and provides information on various topics related to dam engineering. It begins with an introduction to dam safety systems and monitoring. It then discusses the structure, types, and failures of dams. The main types of dams covered are gravity dams, buttress dams, arch dams, and earth dams. The document also addresses dam safety program implementation and development, roles and responsibilities, and guidelines.
The document discusses ocean waves, including how surfers care about breaking wave height to determine the best places to surf. It explains that breaking wave height depends on water depth and can be calculated using formulas involving wave height and period as well as water depth. The document provides resources for learning more about ocean waves and their properties.
This document describes a CFD model developed to simulate circulation patterns and temperature distribution in Lake Binaba, a small and shallow reservoir in Ghana. The model aims to predict heat storage and evaporation. It uses OpenFOAM to solve equations of motion and heat transfer over the lake's complex bathymetry under wind and atmospheric conditions. Results show velocities, heat fluxes at the surface, temperature profiles, and total heat storage over time. The CFD model provides a valuable tool for understanding small and shallow lakes.
This document discusses the design and analysis of cooling towers. It begins with a brief history of cooling tower design and the development of theories to analyze them. It then discusses key parameters that describe cooling tower performance such as range, approach, and water/air ratio. The document outlines methods for analyzing cooling tower performance, including the Merkel method and global conservation equations. It also discusses factors that affect heat transfer in cooling towers and how tower characteristics are determined. Finally, it covers other important design considerations like pressure drops, fan power requirements, and water losses through evaporation and drift.
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 investigates how a vertical-downward elbow affects two-phase flow distribution compared to a vertical-upward elbow through CFD simulation and experimental data.
- For two-phase flow through a vertical-downward elbow, the void fraction has a single peak along the inner wall that dissipates downstream, with little influence from secondary flow patterns.
- This behavior is dramatically different than for a vertical-upward elbow and shows elbow-specific flow models are needed to capture these differences critical to reactor safety analysis.
DSD-INT 2022 Storm Surge Model for Singapore Strait and South China Sea using...Deltares
The document summarizes a storm surge model developed for Singapore Strait and South China Sea using Delft3D FM. The model was set up with a flexible mesh covering the region with elements ranging from 250m to 100km. Benchmark storm surge events were modeled and compared to tide gauge data. The model results showed good agreement with observations. Future work will focus on improving model accuracy and expanding it to 3D to better represent regional circulation.
The document presents a CFD-based approach for estimating short-term evaporation from complex small lakes in arid regions. It describes the challenges of accurately estimating evaporation and introduces a proposed approach using computational fluid dynamics to model heat and mass transfer over the water surface. A case study is presented on Lake Binaba in Ghana to demonstrate the simulation process and framework. Results show the method can produce high spatial resolution data on evaporation rates and fluxes over the water surface under different climatic scenarios. The proposed approach provides an effective means of estimating evaporation that considers important factors like advection and atmospheric instability.
IRJET- Numerical Investigation of Heat Transfer Enhancement in Circular Pipe ...IRJET Journal
1. The document numerically investigates heat transfer enhancement in a circular pipe with various rib geometries, including flat, conical, and right angle ribs.
2. It uses computational fluid dynamics to model water flow through the pipe with Reynolds numbers from 5000 to 60000 and a constant heat flux of 50 W/cm2 applied to the pipe surface.
3. The results show that ribs on the inside of the pipe enhance turbulence in the flow and produce recirculation, disturbing the thermal boundary layer and increasing the rate of heat transfer through the pipe.
This document discusses the use of numerical groundwater modeling to analyze dewatering for the Southeast Collector Trunk Sewer project in York Region. It summarizes how a MODFLOW model was developed using site geology and hydrogeology data to simulate baseline groundwater flow and potential impacts of tunnel construction dewatering. The model was calibrated against water level and streamflow observations and used to assess drawdown, pumping rates, and effects on nearby wells and baseflow to streams under normal and contingency construction scenarios.
DSD-INT 2023 Simulation of Coastal Hydrodynamics and Water Quality in Hong Ko...Deltares
Presentation by Qinghua Ye (Deltares, Netherlands) at the Delft3D User Days, during the Delft Software Days - Edition 2023 (DSD-INT 2023). Thursday, 16 November 2023, Delft.
The document discusses the history and scientific development of cooling tower design theory. It begins by explaining how Merkel developed the first scientific theory for evaluating cooling tower performance in 1925. It then provides definitions of key cooling tower concepts like approach, range, and heat transfer methods. The document goes on to describe parameters like tower characteristics, fan power requirements, and water loss factors. It also summarizes Merkel's assumptions and the development of generalized supply equations from manufacturer curves.
This document discusses using hydrological models like SWAT, MODFLOW, and SEAWAT to assess the impacts of climate change on water resources. It provides an overview of these models, including their inputs, outputs, capabilities, and examples of case studies applying the models. Specifically, SWAT is highlighted as it can be used at the watershed scale to model processes like precipitation, evapotranspiration, infiltration, surface runoff, and streamflow under different climate scenarios. The document emphasizes the importance of hydrological modeling and tools like MODFLOW for understanding and predicting hydrologic system responses to climate change.
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.
DSD-INT 2014 - Symposium Next Generation Hydro Software (NGHS) - How to set u...Deltares
The document summarizes work applying the Delft3D Flexible Mesh model to simulate hydrodynamics around the Sand Motor mega-nourishment project on the Dutch coast. The model setup includes a flexible mesh grid with resolution of around 300m in deeper waters and 17m around the sand engine. Initial results show the model capturing observed salinity and tide fronts. Lessons learned include starting with a coarse grid and refining step-by-step, as well as warming up model runs by interpolating to restart files.
The document describes an integrated groundwater and surface water modelling study conducted for York Region, Ontario, Canada. Key aspects of the study included:
1) Developing a fully integrated groundwater/surface water model using GSFLOW to simulate the complex hydrogeologic setting and assess wellfield sustainability under future development and drought scenarios.
2) Updating the conceptual geologic model and refining the model layers based on new data.
3) Calibrating the hydrology component (PRMS) to water levels, climate data, and the groundwater component (MODFLOW) to estimated baseflows.
4) Applying the integrated model to assess vulnerable areas and the impacts of future pumping and land use
The document summarizes an analysis of an ozone contactor tank using computational fluid dynamics (CFD) modeling. The team's objectives were to develop a 3D two-phase CFD model of the tank to analyze flow characteristics, maximize contact time, and compare simulations to tracer test results. They modeled different air flow rates and observed their effects on phase distribution, velocity profiles, and particle residence times. The CFD model provided insight into improving mixing and reducing dead zones to enhance disinfection performance.
DSD-INT 2023 Salt intrusion Modelling of the Lauwersmeer, towards a measureme...Deltares
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2. Content of this presentation
2/21
• Background of the study
• Model setup
• Model calibration
• Model validation
• Recent model improvements
• Conclusions
Victoria Harbour
3D
hydrodynamic
modelling
of
the
Hong
Kong
waters
3. Background of this study
3/21
• Area description
• Deltares is involved in Hong Kong
modelling studies for more than 25 years
• Aim: setup of a 3D hydrodynamic model
that is suitable for water quality modelling
• Study with/for ERM Hong Kong and EPD
3D
hydrodynamic
modelling
of
the
Hong
Kong
waters
Hong Kong SAR
4. Model setup – Model coverage and grid generation
4/21
3D
hydrodynamic
modelling
of
the
Hong
Kong
waters
• Compared to previous model (shown in red), we applied an
extended model domain with the aim to:
− Improve the modelled residual currents and their variability
− Improve the modelled surge
• Courant grid approach
− The resolution of the network increases with decreasing
water depths
Grid resolution in
Hong Kong waters ≤ 300 m
5. Model setup – Model coverage and grid generation
• Fine resolution where needed (physics and area of interest)
− Previous model (in red): structured grid
− New model (in blue): unstructured grid
• Compared to previous grid, the resolution has increased substantially!
3D
hydrodynamic
modelling
of
the
Hong
Kong
waters
5/21
6. Model setup – Scenario modelling
• Grids adjustments can easily be made using Delft3D Flexible Mesh
− Possible future reclamations
3D
hydrodynamic
modelling
of
the
Hong
Kong
waters
6/21
7. Model setup – Grid generation – Convergence tests
3D
hydrodynamic
modelling
of
the
Hong
Kong
waters
7/21
• Curvilinear vs. squared cells
• Convergence tests to determine
required resolution
• Resolutions: 150, 75, 37.5 m
• Conclusion:
Discharges through cross-sections
converged after applying a resolution of
75 m
• Final grid
− Courant-grid approach
− Curvilinear at selected locations
− Resolution:
Hong Kong waters ≤ 300 m
Hong Kong coastal zones ≤ 75 m
8. Model setup – Bathymetry and boundary conditions
Bathymetry
• GEBCO
• Hong Kong local data
Open boundaries
• Water level (astronomical components)
− FES2012
− Inverse Barometer Correction (IBC)
• Salinity and temperature
− WOA2013
3D
hydrodynamic
modelling
of
the
Hong
Kong
waters
8/21
9. Model setup – Rivers and meteorological forcing
Discharge-points
• River discharges
− eartH2Observe
Meteorological forcing
• Composite heat-flux model
• ECMWF’s ERA5 dataset
− Spatially- and time-varying: Hourly interval, on a 0.25˚ by 0.25˚
resolution grid
− Wind speed (u- and v-direction), atmospheric pressure and
Charnock coefficient
− Dew point temperature, cloud coverage and air temperature (in
addition to the wind speed) are used as input for the heat-flux
model.
3D
hydrodynamic
modelling
of
the
Hong
Kong
waters
9/21
10. Model setup – Model characteristics
Simulation period
• Four-year period (first year is considered spin-up)
Computational grid
• About 110.000 computational cells
• Resolution varies from approx. 5 km at open boundaries
to about 75 m
• Curvilinear grid in selected area and rivers
• Vertical grid: 20 equidistant sigma-layers
Runtime
• 20 partitions (5 nodes with 4 partitions per node)
− Intel quad-core e3-1276 v3 processor (4 cores per node with 3.6 GHz per core)
• 3.1 days per simulation-year (= 12.3 minutes per simulation-day)
3D
hydrodynamic
modelling
of
the
Hong
Kong
waters
10/21
11. Model calibration
• Spatially uniform bottom roughness → tidal amplitudes
• Horizontal/vertical viscosity and diffusivity → horizontal spreading and vertical mixing of salinity and
temperature
− Using the Smagorinsky sub-grid parameterisation
• Solar annual constituent SA and the solar semiannual constituent SSA → seasonal variation in the
water level
3D
hydrodynamic
modelling
of
the
Hong
Kong
waters
11/21
12. Model validation – Water levels
• The tidal part of the total water level was derived by
performing a harmonic analysis
• “Surge” = “total water level” minus “tide”
• Good agreement between observed and modelled
tide and water levels
3D
hydrodynamic
modelling
of
the
Hong
Kong
waters
12/21
Cheung Chau
13. Model validation – Transport patterns
• According to literature and common knowledge, there is a residual offshore current …
− … to the southwest during the winter monsoon (dry season)
− … to the northeast during the summer monsoon (wet season)
3D
hydrodynamic
modelling
of
the
Hong
Kong
waters
13/21
14. Model validation – Transport patterns – Dry season
3D
hydrodynamic
modelling
of
the
Hong
Kong
waters
14/21
Zoomed-out Zoomed-in
Surfaace
Bottom
Surfaace
15. Model validation – Transport patterns – Wet season
3D
hydrodynamic
modelling
of
the
Hong
Kong
waters
15/21
Zoomed-out Zoomed-in
Surfaace
Bottom
16. Model validation – Timeseries of salinity
3D
hydrodynamic
modelling
of
the
Hong
Kong
waters
16/21
17. Model validation – Timeseries of temperature
3D
hydrodynamic
modelling
of
the
Hong
Kong
waters
17/21
18. Coastal upwelling
Coastal upwelling
• In the summer (wet season), the SW monsoon
causes coastal upwelling. As a result, colder
oceanic water is transported towards the Hong
Kong waters.
Recent in-house model improvements
• Boundary conditions: WOA2013 → CMEMS
• Enhanced meteorological forcing
• Z-sigma-layering
• Adjusted grid
• Numerical settings
• In next slides referred to as “Run A → Run B”
3D
hydrodynamic
modelling
of
the
Hong
Kong
waters
18/21
21. Conclusions
• A 3D hydrodynamic model of the Hong Kong waters was generated, validated and now applied in
hydrodynamic (and water quality) studies
• Using Delft3D FM’s unstructured grid, we were able to cover a large model domain
− Resolution in area of interest and where needed
− Capture more physics in enlarged model domain
• The model is forced using available data from open global products (FES, ERA5, WOA2013, CMEMS)
• The model validation shows satisfactory results
• Over the last couple of years, the model approach has been successfully applied in other regions as
well
• Recent model updates result in an improvements of:
− The temperature ‘dip’ in summer/coastal upwelling is now (better) reproduced by the model
− There is an improvement of the modelled total water levels due to an improvement of both the tidal-
and surge-component.
3D
hydrodynamic
modelling
of
the
Hong
Kong
waters
21/21