silting deposit meaning in English

冲击层

Through the statistics and analysis of runoff and amount of sand lost in the downstream of weihe in recent years , it is discovered that in the downstream of weihe the magnitude sand season was ahead of the main flood season relatively within the year ; variation tendency of annual runoff and amount of sand lost was identical basically , and the quantity of water and sand at huaxian gauging station was tailing - off continuously from the 1960 to 2005 ; there was direct relation between the situation of rushing or silting deposits and rainfall at this section of the river : the river depositing in the year which is rich rainfall , the eroding in the poor rainfall
摘要本文通过对近6年渭河下游水沙量数据的统计和分析得出，渭河下游河段年内多沙期较河流主汛期有所提前；年径流量和年输沙量的变化趋势基本一致，而且自60年代至2005年华县站的水沙量持续呈递减趋势；河流的冲淤情况与该河段的降雨量有着直接的关系，当年平均降雨量小的时候河流以淤积为主，当年平均降雨量大的时候河流以冲蚀为主。