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C^aballo Reservoir
1999 Sedimentation Survey
| 题名： | C^aballo Reservoir 1999 Sedimentation Survey |
| 作者： | Kent Collins and Ronakl Fenari |
| 关键词： | reservoir area and capacity/ sedimentation/ reservoir surveys/ sonar/ sediment distribution/ contour area/ reservoir area/ sedimentation survey/ global positioning system |
| 摘要： | The Bureau of Reclamation (Reclamation) surveyed Caballo Reservoir in the spring and fall of 1999 to develop a topographic map and confute a present storage-elevation relationship (area-capacity tables). The underwater survey was conducted at reservoir elevation 4,146.8 feet (project datum is 43.3 feet less than NGVD29). The underwater survey used sonic depth recording equipment interfaced with a global positioning system (GPS) that gave continuous sounding positions throughout the underwater portions of the reservoir covered by the survey vessel. The reservoir topography was determined by importing digital images of the contour lines from the U.S. Geological Survey quadrangle (USGS quad) m^ of the reservoir area. The new topographic map of Caballo Reservoir was developed from the combined 1999 underwater measured topography and the USGS quad contours. In October 1999, standard land surveying methods were used to measure portions of the range lines located above the reservoir water surface. As of April 1999, at reservoir water surface elevation (feet) 4,182.0, the surface area was 11,532 acres with a total capacity of 326,672 acre-feet Since the reservoir ’ s initial filling in 1938,20,064 acre-feet of sediment have accumulated in Caballo Reservoir. Since the last reservoir survey in 1981,4,838 acre-feet of sediment have been trapped. The average annual rate of sediment accumulation since 1938 is 327 acre-feet and since 1981 it is 265 acre-feet |
| 报告类型： | 科技报告 |
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