“MODFLOW - One Water Hydrologic Flow Model”
in cooperation with the United States Geological Survey
California Water Science Center
October 27-29, 2015 from 9:00 to 4:30 pm
Associates Training Room
2020 Research Park Dr., Suite 100, Davis, CA 95618
Workshop Fee: $100 for CWEMF members, $200 for non-members, and $40 for students.
Refreshments included, lunch not included.
The three day workshop will cover the features and use of the USGS’s One-Water Hydrologic Flow Model (MF-OWHM) for analysis of conjunctive use and sustainability of water resources. The workshop will cover current conjunctive use and
sustainability applications, how to use the new features of MF-OWHM, and selected support analysis tools. A simple set of
problems will be used to demonstrate the utility of the supply-and-demand framework that is used to perform resource analysis.
Finally the workshop will introduce the new features that will be part of the MF-OWHM version 2 release that will be available next year (2016).
MF-OWHM allows the simulation, analysis, and management of human and natural water movement within a physically-based
supply-and-demand framework. A unique feature of MF-OWHM is that it allows the simulation of head-dependent flows, flow
-dependent flows, and deformation-dependent flows that collectively affect conjunctive use and sustainability of water resources.
This framework includes groundwater, surface-water, and landscape budgets within water-accounting regions that include
climate, land usage, water deliveries, water transfers, and estimation of unknown ground water pumping, recharge, runoff, and
surface-water deliveries. This also includes surface-water and groundwater allocations as resource limits needed for
sustainability analysis. The supply-constrained and demand-driven framework combined with the linkages among packages and
processes provides complete relations of water use and movement, and helps you keep all water within the model, thus
accounting for "all of the water everywhere and all of the time." While MF-OWHM has many options, it can be used simply and
can be used to assess either data rich or data poor basins. MF-OWHM is based on the MODFLOW-2005 (MF) with the Farm
Process (FMP3), and is the latest, fastest, and most complete version of MODLFOW available from the USGS that incorporates
all the other features available in the separate versions of the MODFLOW suite (NWT, SWR, SWI, LGR) into one integrated
hydrologic flow model. It also includes many original code improvements to MF-2005, as well as many new features that make
building, calibrating, and maintaining models easier. MF-OWHM extends the capabilities of Local Grid Refinement (LGR) for
embedded models to use the Farm Process and Streamflow Routing within embedded grids. MF-OWHM also now includes new
linkages as well as new features such as the Surface-Water Routing Process (SWR), Seawater Intrusion (SWI), Multi-Node
Wells (MNW2), and Riparian Evapotranspiration (RIP-ET). MF-OWHM not only contains all the previously available solvers but
also new solvers such as Newton-Raphson (NWT) and the nonlinear preconditioned conjugate gradient (PCGN). The workshop
will introduce a new way to analyze conjunctive use and sustainability of water resources in a holistic and complete context of the entire simulated hydrosphere.
Randall T. Hanson, USGS Research Hydrologist
Scott Boyce, USGS Hydrologist
Jonathan Traum, USGS Hydrologist
Computer Requirements: Attendees will use their own laptops pre-loaded with MF-OWHM software and example problems.
Links to download the software will be provided prior to the workshop.