CALIFORNIA WATER AND ENVIRONMENTAL MODELING FORUM
- Facilitating an open exchange of information on California water issues
- Resolving technical disagreements in a non-adversarial setting
- Ensuring that technical work continues to take into account the needs of stakeholders and decision makers
Trending
2025 CWEMF Annual Meeting
The California Water and Environmental Modeling Forum held its 31st Annual Meeting from Monday, May 12. 2025 through Wednesday, May 14, 2025 at the Lake Natoma Inn (Venue) in Folsom, California, successfully. Thank you for all participants!
Please check out our post annual meeting survey if you have attended the meeting. The survey will conclude on Friday, May 23, 2025.
Program
Highlights of the 2025 CWEMF Annual Meeting include:
- Click here to view/download the meeting program.
- The annual Awards Ceremony was held immediately following lunch on Monday May 12.
- The keynote address is given Tuesday May 13. This year’s keynote speaker is Dr. Peter Goodwin, University of Maryland.
- A business meeting was held the evening of Monday May 12.
- A poster session is held on Tuesday May 13.
Technical Workshop
Integrated Water Flow Model (IWFM) Training
Hands-on Training Workshop – May 28-30, 2025 (3 Days)
May 28 – 30 (9:00 am – 4:30 pm)
California Natural Resources Headquarters
715 P Street, Room 2-309
Sacramento, CA 95814
This workshop is open to CWEMF members only.
Workshop Fee: $150 ($40 for student)
Refreshments included all three days, lunch not included.
Registration/Payment can be made online below. Payment can also be made via check sent to: CWEMF, P.O. Box 5051, Vacaville, CA 95696-5051. As part of the registration process, please email cwemf@cwemf.org to reserve your seat and include “IWFM Workshop” in the subject line. Go to www.cwemf.org for information on renewing your CWEMF membership or becoming a CWEMF member.
Integrated Water Flow Model (IWFM) 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 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) 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.
Workshop participants will need to bring a laptop computer with several programs installed, including MS Excel, 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 Excel add-in.
Major topics will include:
- Overview of IWFM
- 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) workshop covers these topics in more detail)
- Stream diversions and pumping as water supply
- Automated adjustment of diversions and pumping to meet water demand
Course Instructor: Dr. Can Dogrul, Ph.D. P.E. (Department of Water Resources)
Pay IWFM Workshop
Technical Workshop
CE-QUAL-W2 Hydrodynamic and Water Quality Model V5
Hands-on Training Workshop – June 3-5, 2025 (2.5 Days)
June 3 & 4 (8:30 am – 4:30 pm)
June 5 (8:30 am – 12:00 pm)
Woodard and Curran, Inc. Office
801 T Street, Sacramento, CA 95811
This workshop is open to CWEMF members only.
Workshop Fee: $300 ($50 for student)
Refreshments included all three days, lunch not included.
Registration/Payment can be made online below. Payment can also be made via check sent to: CWEMF, P.O. Box 5051, Vacaville, CA 95696-5051. As part of the registration process, please email cwemf@cwemf.org to reserve your seat and include “CE-QUAL-W2 Workshop” in the subject line. Go to www.cwemf.org for information on renewing your CWEMF membership or becoming a CWEMF member.
CE-QUAL-W2 (W2) is a two-dimensional, laterally averaged hydrodynamic and water quality model with over 30 years of development. It simulates hydrodynamics, water temperature, and various water quality constituents in water bodies. The W2 model is capable of simulating a broad range of constituents, including inorganic solids, bacteria, dissolved gases, metals (Fe, Mn) mercury (Hg), nutrient cycles, and processes contributing to eutrophication. Users can define any number of groups like generic constituents, suspended solids, BOD, algae, epiphyton, macrophytes, and zooplankton. W2 also includes zero-order and first-order bed sediment processes, as well as sediment diagenesis model to quantify sediment oxygen demand (SOD) and nutrient fluxes across sediment-water interfaces. The W2 model provides detailed outputs for velocities, water temperature and all constituents across longitudinal, vertical, and temporal dimensions. This model has been successfully applied in California, across the U.S., and internationally in rivers, lakes, and reservoirs. Its applications include assessing impacts of stressors, conducting thermal and water quality studies, updating reservoir operation manuals, and
developing environmental impact statements.
This workshop will provide an overview of CE-QUAL-W2 V5’s features and highlight major enhancements. The workshop will cover the model input requirements, model development, calibration, and result analysis through lectures and hands-on exercises. By the end of the workshop, attendees will know how to set up and run W2 hydrodynamic and water quality simulations, visualize results, and perform alternative scenario analyses.
Workshop materials will be provided in advance. Participants should bring a laptop pre-loaded with CE-QUAL-W2, a text editor (e.g., TextPad or Notepad++), Microsoft Excel, and permission to run Excel macros.
Lead Instructor: Zhonglong Zhang, PhD, PE, PH, Research Professor, Portland State University
Quick Links
CWEMF ORGANIZATION MEMBERS
CALIFORNIA WATER & ENVIRONMENTAL MODELING FORUM
P.O. Box 5051, Vacaville, CA 95696-5051
(916) 850-3110 https://cwemf@cwemf.org
CWEMF is a 501(c)(3) charitable trust
© 2021 CWEMF.org. All rights reserved.