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Technical Workshop
Integrated Water Flow Model (IWFM)
Version 2015 Training
(in cooperation with the California Department of Water Resources)
July 7-9, 2015 from 9:00 to 4:30 pm
West Yost
Associates Training Room
2020 Research Park Dr., Suite 100, Davis, CA 95618
Directions
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Overview
Integrated Water Flow Model (IWFM) version 2015 is a water resources management and
planning tool that simulates land surface and root zone flow processes, groundwater, stream flows, and surface water-groundwater interactions. Tile drains, subsidence, lakes and lake
-groundwater interactions can also be simulated. IWFM models groundwater flow as a quasi three-dimensional system and solves the governing flow equation using the Galerkin finite
element method. A unique feature of IWFM is the land use based approach of calculating water demands. Agricultural and urban water demands can be pre-specified, or calculated internally
based on user-specified land use distribution, soil properties, climatic conditions and farm water management practices.
This is a companion workshop to the IWFM Demand Calculator (IDC) Version 2015 workshop
which is offered separately, and specifically concentrates on the land-surface and root zone component of IWFM. The workshop participants will learn the basic concepts and mathematical
methods used in IWFM, and will have hands-on exercises that will teach them how to build models from scratch. The software tools that are developed to aid IWFM users in pre- and post
-processing model data and simulation results will also be covered.
Workshop participants will need to bring a laptop computer with several programs
installed, including MS Excel™ 2007, 2010 or 2013, and a powerful text editor such as TextPad™. Before the workshop, participants will need to download workshop materials
(presentations, hands-on examples and guidelines for these examples) and install the IWFM pre- and post-processor tools. IWFM Training Schedule and Software Requirements 
Major topics will include:
- Overview of IWFM-2015
- Simulation of groundwater flow
- Stream flows and stream-groundwater interactions
- Lakes and lake-groundwater interactions
- Tile drains, subsidence, pumping and recharge of groundwater
- Land-use and soil moisture routing; comutation of agricuoltural and urban water demands (these topics will be covered only briefly; IWFM Demand Calculator (IDC) Version 2015
workshop covers these topics in more detail)
- Stream diversions and pumping as water supply
- Automated adjustment of diversions and pumping to meet water demand
- Demonstration of pre-processing and post-processor tools
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