DICU

Explanation

General Description

The Delta Island Consumptive Use (DICU) model simulates the island monthly consumptive uses, corresponding island water supplies, and the channel diversion, seepage and return volumes for 142 islands in the Sacramento – San Joaquin Delta, using the information of 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. DICU model provides time series values of diversion, drainage and seepage at 257 locations throughout the Delta at monthly basis.

Model Domain

Same as DSM2

Developer

Department of Water Resources (DWR) Planning Division

Hardware computing requirements

None

Code language

FORTRAN

Original application

Delta

Public/proprietary and cost

Public

Physically or empirically based

Physically based

Mathematical methods used

Water balance for each sub-area:
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

Main data inputs:

• Monthly precipitation of 7 stations
• Monthly pan evaporation
• Acreages of 142 sub-area
• Acreages of 20 land use categories
• Water year type
• Mean reference ET of each crop
• Irrigation schedule

Outputs

Diversions, seepages and returns of DSM2 nodes

Pre-processing and post-processing tools

None/unknown

Representation of uncertainty

None/unknown

Prevalence

Frequently used in the Delta

Ease of use for public entities

Mass balance model, should be easy to use for public

Ease of obtaining information and availability of technical support

Available upon request

Source code availability

Available upon request

Status of model development

The model is well maintained and actively updated

Challenges in integration

Has been integrated with DSM2