RGDSS_Historic_CUreport_20040601

• Title: RGDSS - Rio Grande Historic Crop Consumptive Use Analysis
• Description: The documentation is for the Rio Grande Basin Historic Crop Consumptive Use Analysis, developed during the RGDSS implementation for the period 1950 through 2002. It includes 100 percent of the crop consumptive use in the basin for the period. Documentation consists of the final Historic Crop Consumptive Use Analysis Report and supporting appendices.
• Decision Support - Doc Type: Modeling Dataset Documentation
• Date: 6/1/2004
• 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

4.6 Historical Diversion File (rg2004.ddh)
The historical diversion file provides surface water supply information required to
estimate supply-limited consumptive use. The demandts DMI command file used to
create the historic diversion file (1950 through 2002) was developed by the Surface
Water Contractor for the RGDSS StateMod effort, as described in the Surface Water
Contractor memorandum Task 6.7 Prepare Diversion Files. Diversions are provided for
each diversion structure and aggregated diversion structure defined in the structure file
(rg2004.str). In addition, the historic diversion file contains diversions for municipal and
industrial structures, transbasin structures, and structures diverting to irrigate lands in
New Mexico. However, only diversions for structures irrigating acreage in Colorado, as
defined in the structure file (rg2004.str), are read by StateCU.
4.7 Historical Pumping File (rg2004.pvh)
The historical pumping file provides ground water supply information, where available,
to use in the estimation of water supply-limited consumptive use. Historic pumping
volumes are not available for most structures in the Rio Grande Basin. The only
exception was for the Mum well located on the Alamosa National Wildlife Refuge, with
average annual pumping of 1812 acre-feet. This data, provided by the Ground Water
Contractor in an Excel Spreadsheet (alamosa.xls), was determined to better represent the
actual pumping on the refuge and was used in the analysis for multi-structure 20MS06,
Alamosa National Wildlife Refuge.
The historical pumping file used in the historic consumptive use analysis was created by
spreadsheet. However, it is anticipated that the TSTooI DMI will be used to extract
historic pumping records from HydroBase and develop the historic pumping input file for
future model updates. The historic pumping file does not require all scenario structures to
be included; however, there must be data for all years in the simulation for the structures
that are represented.
4.8 Historical Surface Water Reuse File (rg2004.dra)
The historical surface water reuse file provides return flow and drain supply information,
where available, to use in the estimation of water supply-limited consumptive use.
Historical return flows that are directly re-used to irrigate lands (i.e. are used prior to
returning to rivers) are not included in the historical diversion file. Thirty-nine structures
that receive return flows were identified based on water user and water commissioner
interviews. Estimated reuse water available to these structures was estimated based on a
preliminary Ground Water Model simulation. The program MODFate was used to
generate the historic surface water reuse file, as described in RGDSS Ground Water Phase 4
Task 42 Estimate the Fate of Surface Water Runoff and Drain Flows, Ray R. Bennett, May 17,
2004, included as Appendix Y in the RGDSS Ground Water Model Report. The historical
surface water reuse file does not require all scenario structures to be included; however,
there must be data for all years in the simulation for the structures that are represented.
cureport_6-2004.doc 28 of 48 June, 2004