青海省三江源区主要河流泥沙特征分析

以青海三江源为研究区,分析三大河流的含沙量、输沙量年内、年际变化特征,结果发现,青海省三江源区主要河流代表站含沙量年内分配极不均匀、年际变化较大,长序列变化趋势不明显;最大月输沙量均出现在7月,最小月输沙量均出现在2月;进入21世纪以来,通天河含沙量比多年平均偏小,输沙量比多年平均偏大,黄河源含沙量、输沙量比多年平均偏小.

Analysis of Changing Characteristics of River Sediment in Three-River Headwaters Region,Qinghai Province

Taking three-rivers headwaters region in Qinghai Province as the study area, the sediment, annual and interannual variation char- acteristics of sediment were analyzed. The result showed lhat the sediment concentration of representative sediment stations is very uneven in month distribution, and has significant changes in year distribution. The trend is nonobvious in long sequence. The maximum and minimum monthly sediment load respectively occurred in July and February. Entering the new century, sediment concentration is less than normal, sedi- ment load is larger than the annual average in Tongtian River. The sediment concentration and sediment load are smaller than the average in Yellow River.