The variations of runoff and sediment load of the basin are caused mainly by human activities.
流域内水沙变化主要是人类活动引起。
The variation of river sediment load is considerably affected by rainfall and underlying surface.
河流输沙量的变化受流域降水和下垫面影响很大。
The released flow from reservoirs carries less sediment load of bed material than pre? dam periods.
建坝后水库下泄水流挟带的床沙质含沙量减少，坝下游河床出现冲刷。
According to the spectrum analysis, the sediment load also fluctuated at the periodicity of 3a and 10a.
根据功率谱分析，入海泥沙还存在着3年和10年左右的周期性波动。
In the construction of barrage diversion works on alluvial rivers with heavy sediment load, complete systematic experience and design criteria are still lacking.
在平原多沙河流上修建引水枢纽，缺乏较系统完整的经验和指导原则。
Periodical analysis showed that abrupt change of sediment load happened in 1968 and 1984, which divided the variation process of river sediment load into three stages.
中国主要河流入海泥沙还具有明显的三个阶段变化特征，即分别在1968年和1984年前后发生了突变。
But the land use structure and reclamation index will not vary obviously with an increase of population, therefore, the sediment load from the river basins will not decrease greatly.
但是，由于人口的增加，土地利用结构与垦殖指数都不会有明显的变化，所以流域的产沙不可能有大幅度的减少。
In the stage of planning silt dam system, the main task of hydrological computation is to design rainstorm, design flood and sediment load and other important characteristic parameters.
淤地坝系规划阶段水文计算的主要任务是计算设计暴雨量、设计洪水量和输沙量等重要特征参数。
In addition, the runoff and sediment load exhibits an obvious decrease tendency in recent years, but it is possible that sediment yield may increase sharply under a same intensive rainstorm.
近年来窟野河水沙量有显著减少的趋势，但存在稀遇暴雨下的增沙可能。
The quantitative variation of runoff and sediment load in the basin of the Middle Yellow River due to the effects of hydro projects and water conservation measures was suggested as a current result.
为了各方面应用的参考，作为阶段性成果，提出了黄河中游水利水保工程减水减沙的定量数据。
The quantitative variation of runoff and sediment load in the basin of the Middle Yellow River due to the effects of hydro projects and water conservation measures was suggested as a current result.
为了各方面应用的参考，作为阶段性成果，提出了黄河中游水利水保工程减水减沙的定量数据。
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