SWAT Model Recalibration - Tetratech-ffx.com

Beaver Lake SWAT Modeling Baseline Analysis February 12, 20091.2 2006 LAND COVERTetra Tech received a coverage of the 2006 land cover for the Beaver Lake watershed from the Universityof Arkansas. Table 1 and Table 2 list the acreages and percentages, respectively, of the eight land usecategories. The majority of the land in the watershed (64.3 percent) is currently forested. Cool and warmseason pasture (fescue and Bermuda grass) make up 21.6 percent of the watershed area. Urban lowdensityand high-density development currently comprise 2.4 percent of the land use. The remaining 11.7percent of the watershed is in row crop agriculture, rangeland/ brush (primarily transitional cutover forestor abandoned pasture), or water. This information is displayed spatially in Figure 2.Table 1.Existing Land Use Acreages by Reporting WatershedReportingWatershedUrbanResidentialLowDensityUrbanResidentialHighDensityWaterAgricultureRangeland/BrushForestPasture,BermudaGrassPastureFescueTotalBrush Creek 354 107 939 85 2,178 11,567 4,605 8,639 28,474East Fork 1,111 237 945 433 5,243 103,144 5,644 9,462 126,218Beaver Lake 3,003 935 2,706 25,047 9,352 94,201 11,919 5,919 153,083Lower White 1,015 261 664 543 1,624 8,729 3,344 4,607 20,787Middle Fork 257 27 681 66 3,116 35,408 3,522 6,085 49,162Richland Creek 764 63 1,342 55 6,673 59,030 6,972 17,463 92,362War Eagle Creek 1,436 485 4,668 1,200 14,360 128,485 20,277 42,739 213,651West Fork 5,368 3,279 1,124 164 5,337 50,303 6,581 7,211 79,367Total 13,309 5,393 13,070 27,593 47,883 490,867 62,864 102,125 763,1034