WRIMS

WRIMS (Water Resource Integrated Modeling System)

Criterion	Explanation
Description	A general purpose language to implement water allocation in regulated river systems.
Developer	California Department of Water Resources (DWR)
Hardware computing requirements	XA Solver Hardware Key if using XA solver for optimization.
Code language	C++ (Cbc solver) / WRESL (model implementations) / Eclipse (GUI environment)
Original application	Generalized water resources modeling system for evaluating operational alternatives in large, complex river basins.
Public/proprietary and cost	WRIMS framework: Eclipse Public License, version 1.0 XA Solver (one of two solver options, the other is free): Proprietary, $1650
Physically or empirically based	Empirically based.
Mathematical methods used	Surface water is represented as a network of nodes and channels. Model objectives and constraints are optimized via Linear Programming
Input data requirements	WRIMS is a generalized framework. Input data will vary by application.
Outputs	WRIMS is a generalized framework. Outputs will vary by application but generally include channel flows and allocation decisions.
Representation of uncertainty	No explicit representation in the model output; could be implemented with multiple scenarios
Prevalence	WRIMS is the underlying framework for Calsim, the de-facto standard for planning California Central Valley operations and Delivery Reliability Report studies
Ease of use for public entities	The WRIMS GUI is based on Eclipse, a well-known IDE with extensive training material and documentation. Ease of use for an application of WRIMS depends on how suitable the WRESL language is for expressing the constraints of that application.
Ease of obtaining information and availability of technical support	There is a WRIMS user group, and DWR support contacts can answer some classes of self-contained questions.
Source code availability	Eclipse and the Cbc solver are both open source. XA Solver is proprietary. Source code for WRESL parsing does not appear to be publicly listed on the WRIMS website.
Status of model development	WRIMS is being actively developed in support of the newest version of the Calsim model.