RGDSS_CU_Losses_Summary

• Title: RGDSS - Rio Grande Basin Consumptive Uses and Losses Summary
• Description: The documentation is for the Rio Grande Basin Consumptive Uses and Losses Summary, developed during the RGDSS implementation for the period 1991 through 1995. It includes 100 percent of the consumptive use in the basin for the period.
• Decision Support - Doc Type: Modeling Dataset Documentation
• Date: 11/1/2000
• DSS Category: Consumptive Use
• DSS: Rio Grande
• Basin: Rio Grande
• Contract/PO #: C153863
• Grant Type: Non-Reimbursable
• Bill Number: HB98-1189, SB99-173
• Prepared By: Leonard Rice Engineering

- Mineral Resources
- Thermal Electric Power
- Other Use (rural, urban, municipal and other industrial uses)
• Exports
Data was developed to estimate these uses as part of the RGDSS project. The State of
Colorado's consumptive use model, StateCU, was used to estimate losses in each
category and combine them into abasin-wide Consumptive Uses and Losses Summary.
1.3 Results
The average annual consumptive uses and losses due to human influence in the Rio
Grande basin total 1,063,900 acre-feet for the period of 1991 through 1995. The
consumptive use due to irrigation, including incidental losses, is 94.4 percent of the total.
The next largest use, at 2.5 percent, is loss from reservoir evaporation. Water consumed
to maintain wetlands for wildlife purposes accounts for 2.2 percent of the basin
consumptive use. The other uses combined, including livestock, mineral, municipal, and
industrial uses, account for less than 1 percent of the consumptive uses and losses in the
basin. Figure 1 provides the average annual consumptive uses and losses, by category,
for the period 1991 through 1995.
Figure 1
Average Annual Consumptive Uses and Losses, 1991-1995
Fish and Wildlife Municipal and
23,800 acre-feet Industrial
6,100 acre-feet
Reservoi r
Evaporation Livestock
26,800 acre-feet '1,600 acre-feet
Exports
1,200 acre-feet
Irrigation
1,004,500 acre-feet
RGDSScusumm.doc 2 of 11 November, 2000