Christopher Martius - Center for International Forestry Research (CIFOR)
Christine Fung - GIZ Fiji, Pacific Community (SPC)
…and the organizations hosting sessions in Stream 2
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
Presented by Charlotte MacAlister, Birhanu Zemadim, Teklu Erkossa, Amare Haileslassie, Dan Fuka, Tammo Steenhuis, Solomon Seyoum, Holger Hoff, Kinde Getnet, and Nancy Johnson to the Nile Basin Development ChallengeScience and Reflection Workshop, Addis Ababa, 4-6 May 2011
Modeling the Effects of Land Use Change on FloodingAdam Nayak
Due to population growth, urban areas in Oregon have been expanding, leading to increases in impervious surfaces and net losses in wetlands, riparian vegetation, and forestation in the Northwest. Utilizing ArcGIS and NOAA’s C-CAP imagery, this study classifies and analyzes urban land use changes between 1996 and 2010. These findings shed light on the importance of land use management in urban settings and are being used by local watershed councils to advocate for changes within their stream basins.
This study explains the use of remote sensing data for spatially distributed hydrological modeling using the MIKE-SHE software used in Tarim River Basin CHINA
AquaResource was contracted by the Province of Ontario to review Integrated Groundwater/Surface Water Models and provide recommendations on their applicability in the Province.
Numerical modeling in support of the characterization and remediation of impacted sediments can be a challenging task, particularly in environments where multiple physical processes influence sediment fate and transport. The interaction of various controls is particularly complex in estuarine settings, where riverine input, water levels, waves, and other coastal processes combine to create a seasonally dynamic environment. Modeling of such environments requires a comprehensive and integrated approach such that the effects of each process can be assessed individually, as these processes can be allowed to interact to reproduce the natural environment as faithfully as possible
Approach and Activities
This contribution describes the development and calibration of an integrated Delft3D numerical model that includes flow, sediment transport, wave processes, and vegetation. The model boundary conditions are based on data collected during a comprehensive field program. Field data were also used to calibrate various model input parameters (such as bed and vegetation roughness). The model was used to understand erosion and deposition during both low and high flow regimes, and thus to aid in understanding important controls on sedimentary dynamics during these predominant regimes.
Results and Lessons Learned
The integrated numerical model predictions capture important sedimentation, erosion, velocity, and water level patterns. Model predictions indicate that during periods of low riverine input, velocity patterns and sediment transport associated with periodic water level changes dominate. During riverine flood conditions flow and sedimentation patterns are controlled by the river itself. Integrated modeling of this setting, including calibration to field data provides a valuable tool for assessment of future conditions, and thus for remediating impacted sediments.
ICLR Friday Forum: Floodplain mapping over Canada: performance at inundation...glennmcgillivray
ICLR conducted a Friday Forum webinar on June 18, 2021 titled 'Floodplain mapping over Canada: Investigating performance at inundation level and understanding dynamics of population flood exposure', led by Dr. Slobodan Simonovic, Director of Engineering Studies, ICLR/Professor Emeritus, Department of Civil and Environmental Engineering, Western University.
Surface runoff estimates from atmospheric re-analysis datasets are increasingly preferred by hydrologists for modelling floods in regions where traditional observations are not sufficiently available. This presentation explores the fidelity of four widely used re-analyses runoff products as hydraulic forcings to a flood inundation model in describing inundation dynamics over Canada. The re-analysis obtained runoff is used with the Catchment-based Macroscale Floodplain (CaMa-Flood) global hydrodynamic model, to derive high-resolution floodplain maps for 100 and 200-yr return periods. The floodplain maps derived from each reanalysis dataset are compared with the regional developed or ‘benchmark floodplain maps’ over six selected flood-prone basins (test basins) in Canada through a set of performance statistics. Using the superior reanalysis runoff dataset, a few historic flood events over the test basins are simulated and subsequently compared with MODIS satellite-derived floodplain information. We notice that more than 75% of the inundation is precisely captured for these events.
The second part of the presentation will focus on the use of four global population datasets (together with census data from Statistics Canada as the reference), their performances and skill in flood exposure assessment across Canada. The flood exposure is quantified based on a set of floodplain maps for Canada derived from the CaMa-Flood global flood model. To obtain further insights at the regional level, the methodology is implemented over six flood-prone River Basins in Canada. We find that about 9% (3.31 million) and 11% (3.90 million) of the Canadian population resides within 1 in 100-yr and 1 in 200-yr floodplains.
This work (i) strongly supports the need for careful selection of a re-analysis dataset while performing inundation modelling for large regions: and (ii) also highlights the need for careful selection of population datasets for preventing further amplification of uncertainties in flood risk. The results derived from this study may be useful for flood risk management and contribute to understanding other disaster impacts on human-environment interrelationships.
Similar to Applications of Integrated Models to Watershed and Sub-Watershed Scale Analysis: A Canadian Context (20)
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
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• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
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Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
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Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
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Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
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Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Applications of Integrated Models to Watershed and Sub-Watershed Scale Analysis: A Canadian Context
1. Applications of Integrated Models to Watershed and Sub-
Watershed Scale Analysis: A Canadian Context
E.J. Wexler, P.J. Thompson, J.D.C. Kassenaar, M. Takeda
Earthfx Incorporated
XXI International Conference Computational Methods in Water
Resources, June 2016
2. Watershed-Scale Integrated Modelling in a Canadian Context
Historical Perspective: Ontario
1990 – 2000
▪ Groundwater models rarely used for engineering design or
impact assessment. Simple water budgets and aquifer tests
2001-2003
▪ Steady state groundwater models for Ontario Municipal Groundwater
Studies and some quarry impact studies
▪ After Walkerton disaster, Source Water Protection called for multi-
tiered assessment of watersheds and municipal supply
2003 – Present
▪ Loosely-coupled hydrologic/groundwater models for Tier 2 and 3
Key questions at Tier 3 level:
▪ Impact of municipal wells on wetlands and coldwater streams
▪ Impact of drought on municipal wells
▪ Impact of future development on groundwater recharge
▪ We developed 7 integrated models for Tier 3 watershed assessments
to answer these questions
2- History in Ontario/Canada
CMWR
2016
Integrated
Watershed
Models by
Earthfx
3. Watershed-Scale Integrated Modelling in a Canadian Context
Integrated Models: Canadian Applications
Watershed Management
▪ Water Budgets (Current/Future)
▪ Source Water Protection
▪ Irrigation demand management
▪ Ecological Flow Needs
Land Development
▪ Cumulative impact of development
▪ Low Impact Design alternatives
Resource Extraction
▪ Quarry/Mine impact
▪ In-Situ oil sands development
▪ Mine-site management
Climate Change Adaptation
3- Model Applications
4. Watershed-Scale Integrated Modelling in a Canadian Context
Integrated Models
Integrated models consider both groundwater and surface water flow.
Feedback between the two systems can dominate in some hydrologic settings
For example, shallow water table influences:
▪ Evapotranspiration rates
▪ Dunnian (saturation excess) runoff
▪ Key for representing groundwater interaction with streams,
lakes, and wetlands.
4- Definitions
Unsaturated
zone
StreamStream
Gravity drainage
Recharge
Ground-water flow
Interflow
ET
Dunnian Runoff
5. Watershed-Scale Integrated Modelling in a Canadian Context
USGS GSFLOW Code
Many integrated modelling codes
We use the USGS integrated GSFLOW code
for watershed and engineering-scale studies:
▪ Open-source, proven, and very well documented
▪ Combines two USGS models: MODFLOW and
PRMS (Precipitation-Runoff Modeling System)
▪ Fully-distributed: cell-based representation of
hydrology and groundwater
Good balance of hydrology, hydraulics, and
groundwater flow
5- GSFLOW
6. Watershed-Scale Integrated Modelling in a Canadian Context
GSFLOW: Multi-Resolution
6
Climate inputs
(Gridded or by gauge)
Hydrology/Soil Zone
(PRMS HRUs)
Hydrogeologic Layers
( MODFLOW finite-difference grid)
Stream Network
1-D Channel segments
- GSFLOW
MODFLOW-NWT
7. Watershed-Scale Integrated Modelling in a Canadian Context
Watershed-Scale Integrated Modelling
in a Canadian Context
CASE STUDY 1:
ORO MORAINE
7- Case Study 1
8. Watershed-Scale Integrated Modelling in a Canadian Context
Oro Moraine: Geologic Setting
Three subwatersheds discharging to
Lake Simcoe
Oro Moraine is a high-recharge feature
Feeds wetlands and headwater streams
Model boundary expanded to
encompass all Moraine-fed watersheds
Complex geology – best seen in
section
8- Oro Moraine
Oro Moraine
Model Boundary
Study sub-
watersheds
9. Watershed-Scale Integrated Modelling in a Canadian Context
Oro Moraine: Geologic Setting
Multiple tills
and sand
layers
Cut across by
“tunnel
channels”
9- Oro Moraine
Oro Moraine
Tunnel Channel
occupied by
Cold Water Creek
Lake
Simcoe
10. Watershed-Scale Integrated Modelling in a Canadian Context
Oro Moraine: Hydrology
GSFLOW model represents all stream segments,
lakes, and wetlands
Calibrated to daily and monthly flows at four
stream gauges
Validated against historical low flow periods
10- Oro Moraine
Coldwater Creek
(02ED007)
11. Watershed-Scale Integrated Modelling in a Canadian Context
Oro Moraine: Groundwater
Shallow system show influence of topography and
streams.
Calibrated against over 3400 static water level
measurements
Fewer (10) transient monitors
Transient model matches seasonal patterns
11- Oro Moraine
12. Watershed-Scale Integrated Modelling in a Canadian Context
Oro Moraine: 10-year Historical Drought
Used daily climate data from 1956-1967
drought to analyze subwatersheds response
Drought sensitivity depended on
whether streams were linked to Oro
Moraine or recharged locally
12- Oro Moraine
1953-1967
Low
High – Tribs
Low - Main
High
13. Watershed-Scale Integrated Modelling in a Canadian Context
Oro Moraine: Groundwater Pathways
Particle tracks
show shallow and
deep flow systems
Oro Moraine
mainly feeds
streams and
wetlands on flanks
Geology influences
stream/aquifer
interactions
Deep flow system
feeds distant
features
13- Oro Moraine
14. Watershed-Scale Integrated Modelling in a Canadian Context
Oro Moraine: Climate Change
Sampled a range of
GCMs.
Used results to scale
baseline T and precip.
Ensemble of climate
simulations show:
▪ Earlier spring freshet
▪ Reduction in summer flows
due to low summer rainfall
and longer recession.
14- Oro Moraine
Jan Y1 Jan Y2 Jan Y3
Note log scale for flow
Flow versus Time - Oro South
15. Watershed-Scale Integrated Modelling in a Canadian Context
Oro Moraine: Climate Change
Integrated models useful
for predictive analysis
Important Factors:
▪ Underlying geology
▪ Connection to regional high
recharge features
▪ Storage
Drought-sensitive
watersheds tended to
be more sensitive to
climate change.
Click for Animation
15- Oro Moraine
Baseline CGCM3T63
16. Watershed-Scale Integrated Modelling in a Canadian Context
Watershed-Scale Integrated Modelling
in a Canadian Context
CASE STUDY 2
CUMULATIVE IMPACT OF
IN-SITU OIL SAND
DEVELOPMENT
16- Case Study 2
From MEG Energy Corp.
17. Watershed-Scale Integrated Modelling in a Canadian Context
MacKay Watershed: Setting
Watershed features:
▪ 600 m of topographic relief
▪ Incised rivers and streams
▪ Over 100 lakes
▪ Extensive muskeg and wetlands
Numerous oil sands operations
▪ Open Pit and In-situ Steam Assisted Gravity
Drainage (SAGD)
▪ Water takings from both surface water and
groundwater (diversions)
▪ Clear cutting, well pads, roads, and
processing facilities affect recharge/runoff
Model to assess future impacts of
expanded SAGD operations
17- MacKay Watershed
Ells River
Athabasca River
AthabascaRiver
18. Watershed-Scale Integrated Modelling in a Canadian Context
MacKay Watershed: Hydrostratigraphic Model
18- MacKay Watershed
After AGS Source: Andriashek and Atkinson, 2007
McMurray
FM
Oil Sands
Grand Rapids aquifer
Viking aquifer
Empress Channel Sands:
Key water supply aquifer
19. Watershed-Scale Integrated Modelling in a Canadian Context
MacKay Watershed: Overland Flow
Overland flow (runoff/runon) and
interflow simulated with a topographically-
controlled cascade network
19- MacKay Watershed
20. Watershed-Scale Integrated Modelling in a Canadian Context
MacKay Watershed: Wetland Classes
Most of area covered by muskeg
26 wetland and vegetative cover
classes used to parameterize the model
Mapping by Ducks Unlimited. (Even in
the middle of nowhere, good datasets
can be found!)
20- MacKay Watershed
21. Watershed-Scale Integrated Modelling in a Canadian Context
MacKay Watershed: Frozen Ground
We noted large lag between freshet and
groundwater recharge
Couldn’t match with existing model
Added new frozen ground module for
GSFLOW
▪ GSFLOW is Open Source!
Based on modified Stefan Equation
▪ Derived by the U.S. Army Corps of Engineers
Model code follows Emerson (1994)
Freezes from top; thaws from top and
bottom
21- MacKay Watershed
𝑋𝑓 =
86,400𝐾𝑓 𝐼𝑓
𝐿 + 𝐶 𝑇𝑎 +
𝐼𝑓
2𝑡
0.5
𝑋𝑓 = 𝑑𝑒𝑝𝑡ℎ 𝑜𝑓 𝑓𝑟𝑜𝑠𝑡
𝐾𝑓 = 𝑡ℎ𝑒𝑟𝑚𝑎𝑙 𝑐𝑜𝑛𝑑𝑢𝑐𝑡𝑖𝑣𝑖𝑡𝑦
𝐼𝑓 = 𝑓𝑟𝑜𝑠𝑡 𝑖𝑛𝑑𝑒𝑥 𝑑𝑒𝑔𝑟𝑒𝑒 𝑑𝑎𝑦𝑠
𝐿 = 𝑙𝑎𝑡𝑒𝑛𝑡 ℎ𝑒𝑎𝑡
𝐶 = 𝑣𝑜𝑙𝑢𝑚𝑒𝑡𝑟𝑖𝑐 ℎ𝑒𝑎𝑡 𝑐𝑎𝑝𝑐𝑖𝑡𝑦
𝑇𝑎 = 𝑚𝑒𝑎𝑛 𝑎𝑛𝑛𝑢𝑎𝑙 𝑠𝑜𝑖𝑙 𝑡𝑒𝑚𝑝𝑒𝑟𝑎𝑡𝑢𝑟𝑒
𝑡 = 𝑑𝑢𝑟𝑎𝑡𝑖𝑜𝑛 𝑜𝑓 𝑡ℎ𝑒 𝑓𝑟𝑒𝑒𝑧𝑖𝑛𝑔 𝑝𝑒𝑟𝑖𝑜𝑑
𝑤ℎ𝑒𝑟𝑒
22. Watershed-Scale Integrated Modelling in a Canadian Context
MacKay Watershed: Frozen Ground
Frozen soil dynamics affect both surface and subsurface processes:
▪ Observed high runoff during spring freshet; but no winter recharge
▪ Groundwater discharge to streams and wetlands reduced in winter
Good match to observed with new module
22- MacKay Watershed
23. Watershed-Scale Integrated Modelling in a Canadian Context
MacKay Watershed: Model Calibration
23- MacKay Watershed
200
300
400
500
600
700
800
200 300 400 500 600 700 800
Simulated(masl)
Observed (masl)
Overburden
Empress Fm.
Labiche Aquitard
Viking Aquifer
Joli Fou Aquitard
Grand Rapids Aquifer
Clearwater Aquitard
McMurray Aquifer/Aquitard
Cooking Lake Aquifer
1:1
Error Intervals (±10 m)
Static Water Levels
Daily Streamflow
Daily Nash-Sutcliffe 0.65
Monthly Nash-Sutcliffe 0.75
Multiple steps: first as stand-alone models; then
as a coupled model
Major advantage of GSFLOW, submodels can be
run separately
Very little transient groundwater data
25. Watershed-Scale Integrated Modelling in a Canadian Context
MacKay Watershed: Future Scenario
Baseline: No pumping
Current Conditions:
▪ 4 Operations including 11 wells.
Full-Build Conditions:
▪ 14 Operations including 42 wells.
▪ Drill pads are estimated to cover 6% of
the planned project areas;
▪ Roads, pipelines, and facilities cover
another 4%.
25- MacKay Watershed
Current
Operations
26. Watershed-Scale Integrated Modelling in a Canadian Context
MacKay Watershed: Groundwater Impacts
26- MacKay Watershed
Cumulative drawdowns are
significant, mainly in deeper
highly-confined aquifer units
Drawdowns generally stable after
20 years, suggesting sustainable
water use
Localized zones where drawdown
exceed 50% of total available
Viking/Pelican Aquifer
Layer 5 Drawdowns
27. Watershed-Scale Integrated Modelling in a Canadian Context
MacKay Watershed: Impacts to Streamflow
Evaluated simulated streamflows with
a number of environmental flow
criteria
Impacts to simulated streamflow in the
major reaches is small
Locally, some stream reaches are
severely impacted around large
diversions
▪ Shows that groundwater diversions mat
locally induce leakage that exceeds
ecological baseflow criteria
Effectively determined by
integrated model
27- MacKay Watershed
28. Watershed-Scale Integrated Modelling in a Canadian Context
Case Study 3 – Wellfield Next to Reservoir
28- Milton
Large wellfield directly adjacent to a
large flood control reservoir
Transient integrated modelling
undertaken to analyze
the influence of reservoir
operations on wellfield
sustainability
Identified previously
unknown linkages between
the wells and the surface
water system
Simulation of the hydraulics was
critical! Click for Animation
Municipal Wellfield
Flood Control
Reservoirs
Transient Drawdowns
29. Watershed-Scale Integrated Modelling in a Canadian Context
Case Study 4 – Mine Impact Assessment
29- Case Study 4
Evaluated impact of future mine build- out
Multi-watershed model, but with high
resolution around the mine site
Model represented open pit, waste rock
stockpiles, drains, and tailings ponds
Model simulated drawdowns and change in
streamflow from pre-mine conditions
Click for Animation
30. Watershed-Scale Integrated Modelling in a Canadian Context
Case Study 5 – York Region Water Budget
Used an integrated model to assess
the sustainability of wellfields that
supply about 200,000 residents
30- York Region
CMWR 2016
31. Watershed-Scale Integrated Modelling in a Canadian Context 31- Case Study 5
Drawdown Impacts on Wetlands
Percent Decrease in Baseflow
Under Future Pumping
Study looked at effect
of drought on wells
Also looked at effect
of wells on wetlands
and coldwater streams
Study showed that
streamflow affected
mainly within 1-m
drawdown line
Few wetlands and
coldwater streams
remained within 1-m
drawdown
Case Study 5 – York Region Water Budget
33. Watershed-Scale Integrated Modelling in a Canadian Context
Challenges in Integrated Modelling
33- Wrap Up
Calibration
▪ Good calibration is mandatory for predictive, engineering studies
Model run times
▪ PRMS is fast but GSFLOW runs can take days
▪ Need faster MODFLOW solvers
▪ Better yet, need parallel solvers so models can run on multi-core machines
Model stability
Data limitations
▪ Continuous groundwater level and streamflow data can be sparse
Staffing
▪ Integrated, multidisciplinary teams are a must!
34. Watershed-Scale Integrated Modelling in a Canadian Context
Overall Conclusions:
34- Wrap Up
Integrated models are effective, practical tools
to evaluate complex, challenging problems
from the watershed to the engineering scale
Models provide insights for complex systems
Canada is moving ahead in the application of
integrated modelling
There are ongoing challenges, but transient,
integrated modelling is becoming the standard
for impact assessments, water budgets,
climate change predictions, drought
assessments, and eco-hydrology studies
Click for Animation Thermal transport from a gravel pit lake