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Show The maps that were available at the beginning of this study did not contain the information that was needed to make an estimate of water depletion by evaporation and transpiration. Consequently, the Division of Water Resources author ized the preparation of " water related" land use maps which would classify the uses of land in such a manner that depletion estimates could be calculated. The collecting of field data and reduction of the data to meaningful numbers was financially aided through a federal grant from the Urban Renewal Administration of the Housing and Home Finance Agency, under the Urban Planning Assistance Program authorized by Section 701 of the Housing Act of 1954, as amended. Vertical aerial photographs, obtained from the ASCS- USDA, were taken into the field and labeled to indicate the boundary and type of vegetation or " water related" land use existing at the time of the survey. In most cases the observer was able to identify the crops from a viewing position near the roadway. After identifying the crops and labeling the photographs, the photographs were brought into the office and projected onto a base map. The crop bound- areas were traced onto the base map and then planimetered or " dot- counted" to determine the acreage. The acreage figure for each individual parcel within the land sub- division ( section, township, and range) was placed on punched cards and programmed through a digital computer to produce the summary table shown in this report. A separate table for each township and range was prepared showing the total land within each section and the amount of land used for each of the land use categories in each section. The base maps containing the land use information were drawn at a scale of 1: 12000 ( 1 inch = 1000 feet) and have been photographically reproduced in this report at a scale of approximately 1: 26000. Each map covers 18 sections located either in the north 1/ 2 or south 1/ 2 of a given township and range. Copies of the full size maps are available from the Division of Water Resources. The collection of water related land use data within the West Colorado Hydrologic Area was conducted primarily by the Division of Water Resources. However, in the Scofield Reservoir subarea, the land use data was collected by the Utah State Division of Water Rights. In the Paria River Basin, the land use data was collected by the Soil Conservation Service. The figures for that area were taken from " Appendix IV, Water Budget Analysis, Sevier River Basin," Utah, July, 1969. Field data has been collected and tabulated, checked, and summarized for use in the hydrologic study of the area. This report contains the detailed maps and tables which show the results of the field survey. A visual alpha- numeric code was used to label the photos and indicate the type of water related land use which existed in the field. The maps included in this report have been labeled with the same code used on the photographs. The code used by the Division of Water Resources is included in the following table; Code for Land Use Survey A. Irrigated Cropland A01 Corn A02 Sugar Beets A03 Potatoes A04 Peas A05 Tomatoes A06 Truck Crop A07 Barley A08 Oats A09 Wheat A10 Alfalfa All Native Grass Hay A12 Cultivated Grass & Other Hay A13 Pasture A14 Wet Land Pasture A15 Native Grass Pasture A16 Orchard A17 Idle A18 Other |