California Water and Environmental  Modeling Forum

Promoting Excellence and Consensus in Water and Environmental Modeling

 Technical Workshop
  Integrated Water Flow Model (IWFM) Version 2015
Training Workshop
 (In cooperation with the California Department of Water Resources)

April 25-27, 2016 from 9:00 to 4:30pm
Bonderson Building Hearing Room 102A
901 P Street, Sacramento, CA 95814
Entrance at 9th and P Street, check in at security guard desk.  Map

Workshop Fee: $150 for CWEMF members, $250 for non-members, and $40 for students.
Refreshments and lunches not included

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 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.

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; computation of agricultural and urban water demands (these topics will be covered only briefly; IWFM Demand Calculator (IDC) Version 2015 workshop (March 8-9, 2016) 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- and post-processor tools