DICU

Owned by Sujoy Roy

Last updated: Dec 05, 2018

2 min read

Delta Island Consumptive Use (DICU) Model

Criterion	Explanation
General Description	The Delta Island Consumptive Use (DICU) model simulates the island monthly consumptive use, corresponding island water supplies, and channel diversion, seepage and return flow volumes for 142 islands in the Sacramento – San Joaquin Delta. The calculation is performed using information on land use, historical precipitation, and agricultural activities. The model is used to estimate historical agricultural flows, future planning agricultural volumes, and the estimate values were assigned to nodes in DSM2. The DICU model provides time series values of diversions, drainage and seepage at 257 locations throughout the Delta at a monthly time step.
Model Domain	The model domain is the same as DSM2.
Developer	California Department of Water Resources (DWR) Planning Division
Hardware computing requirements	The model runs on Windows based computer platforms.
Code language	FORTRAN
Original application	The model was developed for the Delta.
Public/proprietary and cost	Public
Physically or empirically based	Physically based
Mathematical methods used	The water balance for each sub-area consists of the following terms: TCU = CUp + CUs + CUaw + dSM = ET + dSM TCU – total consumptive use CUp – consumptive use of precipitation CUs – consumptive use of seepage CUaw – consumptive use of applied water dSM – soil moisture change
Input data requirements	The main data inputs are: Monthly precipitation at 7 stations Monthly pan evaporation Acreages of 142 sub-areas Acreages of 20 land use categories Water year type Mean reference ET of each crop Irrigation schedule
Outputs	Model outputs include diversions, seepage and return flows at DSM2 nodes.
Pre-processing and post-processing tools	None/unknown.
Representation of uncertainty	None/unknown.
Prevalence	Frequently used in the Delta, and in conjunction with the DSM2 model.
Ease of use for public entities	Mass balance model, easy to use for public entities
Ease of obtaining information and availability of technical support	Technical support is available upon request from DWR.
Source code availability	Available upon request.
Status of model development	The model is well maintained and actively updated.
Challenges in integration	The model has been integrated with DSM2.

Model inventory developed for Delta Stewardship Council Integrated Modeling Steering Committee (IMSC)