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Table 3 <br />Average Annual 1950 - 2004 Rechar a Estimates for Non-Irri ated Lands <br /> Annual Results <br />Location Soil Class PT <br />(inches) PQ <br />(%) PE + ps <br />(%) PD <br />(%) <br /> [1] [2] [3] [4] [5] <br /> A 0 98 2 <br />Kassler B 17.3 1 97 2 <br /> C 2 96 2 <br />F A 0 100 0 <br />ort <br />M B 11.2 0 100 0 <br />organ C 1 99 0 <br /> A 0 100 0 <br />Julesburg B 14.5 1 99 0 <br /> C 3 97 0 <br />Notes: [1] Per the NEH soil classification and STATSGO mapping. <br />[2] Calculated from NOAA climate data. <br />[3] Calculated using the SCS Curve number approach. <br />[4] PE was estimated differently for irrigation versus non-irrigation season. PS was <br />calculated based on an annual soil moisture balance approach. <br />[5] Calculated as the residual of columns [2] - [3] - [4]. <br />The analyses results in the following average recharge percentages. Although there is a range, <br />representing recharge by soil class as a single value acknowledges the uncertainties in data used <br />in the engineering analyses. <br />• Irrigated Lands/Growing Season (April through October): <br />- Soil Class A - 23 percent of the April through October total precipitation (range <br />of 20 to 27 percent) <br />- Soil Class B - 14 percent of the April through October total precipitation (range <br />of 9 to 22 percent) <br />- Soil Class C - 4 percent of the April through October total precipitation (range of <br />0 to 12 percent) <br />• Irrigated Lands/Non-Growing Season - 1 percent (range of 0.3 to 1.8 percent) <br />• Non-Irrigated Lands/Year-Round - 1 percent (range of 0 to 2 percent) <br />When precipitation is allocated to uses in other SPDSS tasks, the methods used are the same. Therefore, <br />the results using this approach are reasonable and consistent with other estimates developed <br />under SPDSS including Task 65 -Estimate Ground Water Use of Native Vegetation and Develop <br />ET/Depth to Ground Water Relationships and Task 74 -Historical Consumptive Use Analysis and <br />Report. <br />3. Develop Monthly Precipitation Recharge Estimates for the Denver Basin and South Platte <br />Alluvial Groundwater Model Areas <br />Precipitation recharge is input to the ground water model on a cell basis. The GIS-based data management <br />interface (StateDGI) provides the land use, soil type, and climate assignments by cell to the ground water <br />Task 64.doc 12 of 13 <br />