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RGDSS_Historic_CUreport_20040601
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RGDSS_Historic_CUreport_20040601
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Last modified
4/17/2013 10:08:47 AM
Creation date
5/27/2008 2:11:23 PM
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Decision Support Systems
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
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4.2 StateCU Model Control File (rg2004.ccu) <br />The StateCU Model control file contains the following information used in the historic <br />consumptive use analysis: <br />• Beginning and ending year for simulation -The period of record for the analysis was <br />1950 through 2002. <br />• Consumptive use analysis method -SCS Modified Blaney-Griddle, described in TR- <br />21 was used. <br />• Effective precipitation method -The SCS Effective Precipitation method, defined in <br />TR-21 was used. <br />• Scenario type -The analysis was defined as a "structure" scenario. <br />• Water supply/rights consideration -The water supply/rights consideration switch was <br />set to "4" which specifies that water supply-limited consumptive use was calculated <br />considering both surface and ground water sources, but consumptive use was not <br />accounted for by water rights. <br />• Soil moisture consideration -The soil moisture switch was set "1" indicating the <br />analysis should include soil moisture accounting. <br />• Initial soil moisture information -The initial soil moisture reservoir was set to 20 <br />percent of full capacity at the beginning of the analysis period (1950). This soil <br />moisture content represents the irrigation season ending soil moisture content <br />predicted by StateCU for the Rio Grande Basin. The initial soil moisture content <br />applies to all structures modeled in the analysis. <br />• Winter carry-over precipitation percent -The winter carry-over precipitation defines <br />the amount of non-irrigation season precipitation that is available for storage in the <br />soil moisture reservoir. Winter carry-over precipitation percent was set to 0 for the <br />Rio Grande analysis. Based on winter conditions in the San Luis Valley, it is <br />believed that most of winter precipitation does not contribute to soil moisture storage, <br />but instead is sublimated or evaporated. <br />• Surface water reuse consideration -The surface water reuse switch was set to "1" <br />indicating the analysis should consider drain/return flow information in the supply- <br />limited calculation. <br />• Input summary and output options -The input summary switch was set to "0" <br />indicating the basic input summary was generated. The output summary switch was <br />set to "3" indicating a detailed water budget output was generated. The switch for <br />additional reporting for the ground water modeling effort was set to "1". Additional <br />reporting includes ground water pumping by irrigation method (flood and sprinkler), <br />consumptive use shortage, and irrigation water requirements for irrigated meadow <br />and alfalfa. <br />The StateCU model control file was created by hand for the Rio Grande Basin. Options <br />in the model control file can be revised through the StateCU Interface. <br />cureport_6-2004.doc 17 of 48 June, 2004 <br />
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