"蓄清排浑"水库运用方式与淤积过程关系探讨

为减轻水库泥沙淤积,我国研究工作者提出了行之有效的＂蓄清排浑＂运用模式.以往人们对＂蓄清排浑＂的理解基本停留在原则框架的层次,对＂蓄清排浑＂水库淤积过程的认识不够深入.本文采用一维不平衡泥沙数学模型,以溪洛渡水库为案例,针对影响＂蓄清排浑＂水库运行条件最为重要的时间和空间因素,从汛后蓄水时间和汛期限制水位两个方面对水库淤积量过程、三角洲推进、横断面发展和排沙比变化等淤积特性的影响进行了分析.研究结果给出了不同水库运行条件下库区泥沙淤积的一般规律.

Relationship between operation and sedimentation processes for the "storing clear and releasing muddy" reservoirs

In the recent years,the operation mode of "storing clear and releasing muddy" has been widely applied in China to reduce the reservoir sedimentation.However,the relationship between the operation mode and the sedimentation processes are still unclear.In this paper,1D nonequilibrium sediment mathematical model is applied to analyze the influences of the different flood control level and different storage time in the end of the flood seasons upon the reservoir sedimentation processes.A reservoir named Xiluodu is taken as a case to demonstrate the deposition characteristics including the total sedimentation accumulation,delta evolvement,section development and the delivery ratio.The study results show that the operation schedule could greatly affect the sedimentation processes.