二龙山水库是修建在丹江上游的一座以防洪、发电为主,综合利用的中型水库,其淤积规律在陕南秦巴山区中型水库有一定的代表性,本文详细分析了该水库淤积规律、淤积纵、横向分布。指出汛期利用异重流、浑水水库排沙,定期泄空冲刷,是使水库保持一定库容长期使用的重要技术措施。 Erlongshan Reservoir is a medium-sized reservoir built predominantly in flood control, power generation and comprehensive utilization in the upper reaches of Danjiang River. The sedimentation law of the Erlongshan Reservoir is representative of the medium-sized reservoirs in the Qinling-Bashan Mountains of southern Shaanxi. This paper analyzes the sedimentation rules of the reservoir in detail, Silting vertical and horizontal distribution. It is pointed out that it is an important technical measure to make the reservoirs keep a certain storage capacity for a long time through the use of heavy flow in the flood season and sediment discharge in the muddy water reservoirs.