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CRDSS <br />TASK MEMORANDUM 1.14-10 <br />Consumptive Use Model <br />?cucommon? Data Management Interface - Returns Consumptive Use Model <br />Input Files For Common Data <br />1.0 ISSUE <br />The consumptive use (CU) model requires several formatted input files. At the highest level, a user <br />chooses to run the CU model using a specified area and time period. The area, represented by one or <br />more spatial identifiers, and the time period are passed on to several data management interface (DMI) <br />utilities, each of which supplies one or more of the required input files. <br />This DMI generates a formatted common-data file required by both the evapotranspiration and non- <br />evapotranspiration components of the CU model. Files having ?.cmn? as a suffix contain general <br />information common to the evapotranspiration and non-evapotranspiration components. <br />2.0 DISCUSSION/ANALYSIS <br />The IDS Group is responsible for creating this routine; however, data are retrieve d from the CRDSS <br />database by a low-level DMI provided by RTi. The low-level DMI directly queries the database and <br />returns required data to the calling routine. The input and output formats for the low-level DMI will be <br />defined based on the direct effects they have on the construction and generalization of the DMI for other <br />uses. <br />The general function of this DMI is to return formatted data on crop/soil combinations for the specified <br />area and time period. <br />cucommon DMI Inputs <br />The DMI is passed the name of a control file defining the area and time parameters selected by the user. <br />This file is read by the DMI as it builds the low-level DMI input data structure. Control files have ?.ctl? <br />as a suffix. The file format is attached. <br />Area and Time Parameters <br />A number of spatial identifiers describing the specified area <br />? <br />Area to be supported: county, water district, hydrologic unit, and river basin <br />? <br />A list of spatial identifiers describing the specified area (county name, water district number, <br />? <br />hydrologic unit number, or river basin name) <br />The begin year for the model run <br />? <br />1 <br />A275 01.09.95 1.14-10 CSU IDS <br />