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Task 52 -Provide Technical Guidance and Review of GIS Land Classification and <br />Attributes <br />Background: <br />The irrigated acreage and tie to water source is the basis for the historic consumptive use <br />analysis. This task will provide the necessary review, coordination, and communication between <br />the GIS and Consumptive Use contractors in order to ensure that the necessary data is being <br />developed for the consumptive use analysis tasks outlined below. <br />Objective: <br />To aid the GIS contractor in determining the extent and character of irrigated lands in the South <br />Platte and North Platte River Basins by providing technical guidance and review of work <br />products. Provide the GIS contractor with key structure list information, developed in Task 3 <br />and crop categories by geographic area, developed in Task 54. Review intermediate and final <br />2002 irrigated acreage coverage and key structure service area assignments. <br />Approach: <br />52.1 Coordinate with the GIS contractor and provide technical guidance during the <br />development of the 2000 irrigated acreage coverage, by reviewing up to two draft <br />coverages and the final coverage. Provide summaries of crops by geographic area and <br />crop type categories to use in characterizing irrigated lands. Review key structure service <br />area and associated acreage designations by comparing general estimated irrigation <br />requirements to historic diversion and available pumping estimates. When possible, <br />assist the GIS contractor with refining service areas during the interviews required for <br />Task 3. Up to eight (8) full-day meetings are anticipated over two-years. <br />Deliverables: <br />52.1 A memorandum that documents the results and recommendations based on two technical <br />reviews of intermediate 2000 irrigated acreage coverage and key structure service area <br />coverage, and a technical review of the final 2000 irrigated acreage coverage and key <br />structure service area coverage. <br />Tasks 53 and 72 -Collect and Fill Missing Climate Data and Assign Climate Stations to <br />Irrigated Acreage <br />Background: <br />Climate data will be used to estimate historic crop consumptive use in Division 1 and Water <br />District 47. The Blaney-Griddle evapotranspiration method, which is the current method used <br />for consumptive use analysis in the CDSS, requires monthly temperature and precipitation data. <br />Other monthly or daily methods, such as the Kimberly Penman method, may be added to the <br />SPDSS and require climate information such as wind speed, solar radiation, and vapor pressure. <br />This data is generally available from sources other than NOAA, and not currently stored in <br />HydroBase for Division 1. Evaporation data, used to determine reservoir evaporation for both <br />SPDSS Consumptive Use and Water Budget Component l0 <br />