湟水干流青海段泥沙危害及其成因

湟水流域是青海省工农业生产基地，也是青海省主要水土流失区。近年来，湟水干流泥沙危害愈来愈严重，直接危及该地区社会经济可持续发展和人民生命财产的安全。分析了湟水干流泥沙淤积的危害及其成因，认为该段湟水两岸山区严重的水土流失是其根源，上游来水量和大洪水出现次数减少加剧了干流淤积，人为经济活动也是加剧干流泥沙淤积重要原因。

Sediment in Huangshui Mainstream in Qinghai and Its Formative Cause

The Huangshui valley is the industrial and agricultural base in Qinghai,as well as is the major area with soil and water loss.In recent years,in the mainstream of Huangshui,the harm of sediment is getting from bad to worse,directly threatening the social and economic sustainable development and people’s lives and properties.By analyzing the sediment and its cause,a conclusion is drawn,that is the soil and water loss is the main source,the runoff from the upper and the decline of flood as well as human activitiees aggravated deposition.