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2001 Lake Mead Sedimentation Survey.
| 题名： | 2001 Lake Mead Sedimentation Survey. |
| 作者： | ferrari, r. l. |
| 关键词： | sediments, reserviors, accumulation, global positioning systems, dams, hydrography, topography, capacity, area, maps, bathymetry |
| 摘要： | The 2001 Lake Mead survey measured an increase in reservoir capacity of 219,150 acre-feet since the 1961-64 (1963) reservoir survey. The increased capacity was attributed to a significant decrease of sediment inflow due to the March 1963 closure of Glen Canyon Dam, located upstream of Lake Mead, and compaction of the previous sediment deposition. Since Hoover Dam closure in 1935, the 2001 study measured 2,402, 770 acre-feet of sediment deposition compared to the 1963 survey result of 2,621,920 acre-feet. As of September 2001, at water surface elevation 1,229.0, the surface was 162,548 acres with a total capacity of 29,979,010 acre-feet. The 2001 study measured an average annual rate of sediment accumulation, since dam closure, of 36,024 acre-feet compared to the 1963 average annual rate of 88,028 acre-feet. Since the 1963 closure of Glen Canyon Dam and the significant trapping of the Colorado River sediments within Lake Powell, the Lake Mead average sediment inflow rate has significantly decreased to an estimated rate of less than 10,000 acre-feet per year. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |
| 总页数： | u0818；214p |
| 报告类型： | 科技报告 |
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