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作为流域大面积快速治理规划的一部分,美国农业部在五十年代中开始修建许多小型的多目标水库和泄洪水库。在规划设计这些水库时,必需选择泥沙的堆积地点,从而规定建筑寿命。不能提供足够的堆沙库容会严重损害其防洪或其它方面的效益。 水库拦沙率是指拦在库内泥沙与入库泥沙的比值。通常以百分数表示。尽管五十年代有一些水库泥沙堆积速度的资料,但不大知道小型建筑物真正的拦沙能力。因此,水土保持机构与农业研究部门及美国地质勘测局合作,选择一批小型泄洪水库进行研究。该项研究的目的是为拦泥能力提供基本资料,以便用以编制和改进小型水库的设计准则。本文概述了该项研究所取得的成果。
As part of a large area rapid management program, the USDA started construction of many small multi-target reservoirs and flood discharge reservoirs in the mid-1950s. In the planning and design of these reservoirs, it is necessary to choose the sediment accumulation site, thus stipulating the construction life span. Failure to provide adequate containment capacity can severely damage flood control or other benefits. Sediment rate refers to the reservoir stopped in the reservoir sediment and sediment ratio. Usually expressed as a percentage. Although there was some information on the sediment accumulation rate of reservoirs in the 1950s, the actual sediment retention capacity of small buildings was poorly understood. As a result, the Soil and Water Conservation Agency, in cooperation with the Agricultural Research Department and the United States Geological Survey, selected a group of small-scale flood discharge reservoirs for research. The purpose of this study is to provide basic information on sludge containment capacity for the preparation and improvement of design guidelines for small reservoirs. This article outlines the research results achieved.