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对偏关水文站1958—2008年实测降水、径流、泥沙资料进行了分析,发现在不同年代年降水量保持基本稳定的情况下,偏关河年径流量和年输沙量呈明显的逐年减少趋势,但与短历时暴雨和降水强度关系不大。这一水沙变化现象说明,经过几十年的水土保持综合治理,偏关河流域的水土流失得到了明显的控制,生态环境得到明显改善,水土保持综合治理成效显著。
The data of precipitation, runoff and sediment measured from 1958 to 2008 in PiaoGuan Hydrological Station were analyzed. It was found that the annual runoff and annual sediment transport of PYG were obviously year by year under the condition of stable annual precipitation in different years Reduce the trend, but not with the short duration rainfall and precipitation intensity. The phenomenon of water and sediment changes shows that after several decades of comprehensive management of soil and water conservation, the soil and water loss in the Piao River Basin has been obviously controlled, the ecological environment has been significantly improved, and the comprehensive management of soil and water conservation has achieved remarkable results.