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。
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。
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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