Laserfiche WebLink
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 />