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<br />. ~ ou- iSn <br />" . <br />Task 1.14(b) - Consumptive Use Prototype Development <br /> <br />Table 1: Crop Numbers and Characteristics" <br /> <br />10 Sugar Beets 28 28 no data no data 184 87 <br />11 Corn Grain 60 45 May 13 Oetg 140 72 <br />12 Hill Pasl1Jre Grass 45 45 April 15 Oell 169 110 <br />13 Sweet Com 55 45 May 13 Oct 9 140 72 <br />14 Snap Beans 60 32 May 25 Sept 15 112 55 <br />15 Meadow Harvest Grass 45 45 April 15 Oell 169 110 <br />t6 Sod Fenns or Lawns 45 45 April 15 Oell t69 110 <br />17 Green Beans 60 32 May 25 no data 90 50 <br />18 Cotton 62 32 no data no data 240 no data <br />19 Wheat Fall 45 45 Sept. 1 Dee.31 122 100 <br />20 Wheat Spring 45 45 April 1 August 15 152 100 <br />21 Small Vegetables E5 45 May 8 Oct t 146 45 <br /> <br />a. The sources for this information are USDA (1970), USBR (1986), and The colorado State University <br />Cooperative Extension Office. <br /> <br />The sources for the information in Table 1 are different depending on the crop type or the <br />characteristic, for example alfalfa's starting and ending temperatures come from USDA <br />(1970) and the season length and days to full cover comes from the Colorado State University <br />Cooperative Extension Office. <br /> <br />.Soil Characteristics <br /> <br />. Soil characteristics important for estimating ET rates include field capacity and <br />permanent wilting point which together define the water holding capacity of the <br />soil, an important parameter in determining a soil moisture budget. The drying <br />characteristics of the soil is an important factor in estimating the wet soil <br />evaporation. These characteristics can be determined by the type of soil. Soil types <br />varies with depth, but the model will only use one soil type for each unit of area. <br />Rather then selecting the soil type in the first layer, that may not compose the <br />majority of the root zone, an aggregate soil type for all the layers will be chosen at <br />the GIS level using ARC/lNFO. The current plan is to use STATSCO data for soil <br />types and aggregate it into 4 to 12 categories of soil texture that will be used to <br />estimate the field capacity and the wilting point for irrigated lands. <br /> <br />3.3 Estimating Consumptive Use for Other Uses <br /> <br />Stock Ponds <br /> <br />. The subroutine for calculating CU of stock-pond is now included in the main CU <br />model routine. <br /> <br />. General stock pond data included in the USSR (1986) were used to develop a <br />preliminary estimate for the stock pond category. <br /> <br />Livestock <br /> <br />9/30/94 - September Update (1.14-9) <br /> <br />7 <br /> <br />IDS Group, CSU <br />