Upper Gila Watershed (HUC8 15040001)
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Upper Gila Watershed (HUC8 15040001) Rapid Watershed Assessment Upper Gila Watershed 1 Upper Gila Watershed (HUC8 15040001) The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination writ e to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. 2 Upper Gila Watershed (HUC8 15040001) Table of Contents Overview ......................................................................................................................................... 5 Physical Setting ............................................................................................................................... 7 Precipitation .................................................................................................................................. 10 Land Ownership ............................................................................................................................ 10 Fires………………………………………………………………………………………………13 Land Use / Land Cover ................................................................................................................. 13 Hydrology ..................................................................................................................................... 19 Threatened and Endangered Species ............................................................................................ 27 Invasive Species ............................................................................................................................ 28 Common Resource Areas ............................................................................................................. 29 Conservation ................................................................................................................................. 31 Soil Resource Inventory ................................................................................................................ 32 Socioeconomic Data (2010) ........................................................................................................ 36 References ..................................................................................................................................... 37 List of Tables Table 1. Upper Gila Watershed acreage distribution. ..................................................................... 6 Table 2. Land ownership in the Upper Gila Watershed ................................................................ 12 Table 3. Extent of NLCD classes in the Upper Gila Watershed. .................................................. 16 Table 4. SW Region Gap analysis ecosystem acreages. ............................................................... 18 Table 5. NHD Water Course Type and Extents ........................................................................... 20 Table 6. Listed Uses. NS = Not Supporting, NA = not assessed, x = Fully Supporting ............. 23 Table 7. Possible Causes of Impairment ....................................................................................... 25 Table 8. Threatened and Endanged Plant and Animal Species.....................................................27 Table 9. Invasive Species Recognized by the SWEMP. ............................................................... 28 Table 10. 5 year Trends in Applied Conservation Practices. Reported in Acres. ....................... 31 Table 11. 5 Year Trends in Location Specific Applied Conservation Practices. Reported in Feet if Linear (i.e. Fence) ...................................................................................................................... 31 Table 12. Criteria Used for Soil Erosion Susceptibility Model. .................................................. 33 Table 13. Soil Erosion Potential Model Results. A greater rank indicates greater potential for erosion. .......................................................................................................................................... 35 Table 14. Socioeconomic Data of the Counties in the Upper Gila Watershed (2010).................36 List of Figures Upper Gila Watershed (HUC8 15040001) Figure 1. Upper Gila Watershed Overview ................................................................................... 5 Figure 2. Upper Gila Watershed Hydrologic Soil Group .............................................................. 8 Figure 3. Upper Gila Watershed Shaded Relief ............................................................................. 9 Figure 4 Upper Gila Watershed Annual Precipitation. ............................................................... 10 Figure 5. Upper Gila Watershed Land Ownership. ..................................................................... 11 Figure 6. Whitewater Baldy Complex in the Upper Gila Watershed……………………………………………………………………………………..…14 Figure 7. Subset of the National Land Cover Dataset over the Upper Gila Watershed. ............. 15 Figure 8. Subset of the SWREGAP over the Upper Gila Watershed. The 10 dominant ecosystems are displayed in the legend. ....................................................................................... 17 Figure 9. National Hydrologic Dataset (NHD) of the Upper Gila Watershed ............................. 19 Figure 10. Gauging Stations in the Upper Gila Watershed ......................................................... 21 Figure 11. Monthly Average of Mean Daily Flow on the Upper Gila Watershed at Gila River near Gila, NM. Period of observation: 1927-2011. ...................................................................... 22 Figure 12. 303(d) Impaired Waters .............................................................................................. 24 Figure 13. Declared Groundwater Basins of the Upper Gila ....................................................... 26 Figure 14. Common Resource Areas of the Upper Gila. .......... ...................................................29 Figure 15. National Cooperative Soil Survey coverage of the Upper Gila Watershed. .............. 32 Figure 16. Upper Gila Watershed Erosion Potential. .................................................................. 34 Upper Gila Watershed (HUC8 15040001) Overview Figure 1. Upper Gila Watershed Overview. 5 Upper Gila Watershed (HUC8 15040001) Overview The Upper Gila Watershed is located in southwestern-central New Mexico and it covers 1,270,253 total acres (5,141 sq. km). Portions of the Upper Gila Watershed are in Catron, Grant, and Sierra counties. Table 1 summarizes the distribution of the Upper Gila Watershed. County Acres % of HUC in % of County in County Acres in HUC Total County HUC Catron 4,442,108 787,200 62 18 Grant 2,543,536 372,307 29 15 Sierra 2,711,883 110,746 9 4 Sum (∑) -- 1,270,253 100 -- Table 1. Upper Gila Watershed acreage distribution. Upper Gila Watershed (HUC8 15040001) Physical Setting Geology: The watershed is in the Transition Zone between the Colorado Plateau and Basin and Range physiographic provinces. The Colorado Plateau physiographic province consists of flat-lying, undeformed sedimentary rocks. The Basin and Range physiographic province is dominated by faulting, volcanism, magma intrusion, erosion and sedimentation. This produces elongated valleys filled with sediment and rock debris with north to north-west trending fault-block or volcanic highlands. Most of the watershed is designated a wilderness area. Much of the river, in this reach, is bedrock controlled. Rivers respond by aggrading during climates that promote large sediment yield and large, stable discharges; and incise during climates that produce flashy flows and reduce the sediment supply. Groundwater quality and quantity is a concern. Depth to groundwater is a concern if the shallow unconfined aquifer does not produce enough water for the resource or increased population demands are ‘mining’ the water. Groundwater quality ranges from good to fair for livestock or crops. Soils: Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms. The soils in the Upper Gila Watershed are assigned to four groups (A, B, C, and D). Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of deep or deep, moderately well drained or well-drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate