Interpretation of the Sidescan-sonar Imagery in Lake Mohave

Lake Mohave is one of several multi-purpose reservoirs that have been constructed on the Colorado River. The lake was formed upon completion of the Davis Dam in 1953. No mapping of the floor of the lake had been conducted since completion of the Davis Dam. The U.S. Geological Survey, in cooperation with researchers from the University of Nevada Las Vegas, completed a geophysical survey of this lake in April 2002. The survey included collection of sidescan sonar imagery of nearly the entire lake floor, and high-resolution seismic-reflection profiles along widely spaced lines throughout the lake. The detailed mapping of the lake floor was used to determine the amount of sediment that had accumulated in the lake since impoundment, its distribution, and the processes of deposition.

莫哈韦湖（Lake Mohave）是科罗拉多河上修建的多座多用途水库之一。该湖于1953年戴维斯大坝（Davis Dam）竣工后形成。自戴维斯大坝建成以来，尚未对该湖湖床开展过任何测绘工作。2002年4月，美国地质调查局（U.S. Geological Survey）联合内华达大学拉斯维加斯分校（University of Nevada Las Vegas）的研究人员，完成了针对该湖的地球物理勘测。此次勘测内容包括采集几乎覆盖全湖床的侧扫声呐（sidescan sonar）图像，以及沿全湖广泛布设测线获取的高分辨率地震反射剖面数据。本次湖床精细测绘成果被用于明确该水库自蓄水以来湖内淤积沉积物的总量、分布特征及沉积过程。