水库泥沙淤积滞后响应的理论模型

河床演变中普遍存在着滞后响应现象,而以往的水库泥沙研究对滞后响应现象很少考虑.本文在作者近期关于水库泥沙淤积滞后现象研究的基础上,从河床演变学的自动调整原理出发,建立了水库泥沙淤积滞后响应的理论模型.并以三门峡水库泥沙淤积为例,利用提出的理论模型分析了库区累计淤积量对流量加权平均坝前水位的响应、潼关高程对年入库水量的响应及水库末端比降对年平均坝前水位的响应,结果表明所建理论模型能够描述泥沙淤积的特征,为水库泥沙淤积的研究提供了一种新的方法.

Theoretical model for delayed response of reservoir sedimentation

The delayed response of sedimentation is a phenomenon commonly encountered in fluvial processes of rivers. Based on the author's recent findings on this phenomenon and the self regulating principle of river evolution, a theoretical model for describing the delayed response happened to the deposition of reservoir is developed. The proposed model is applied to analyze the response of accumulative deposition in the Sanmenxia Reservoir to the discharge weighted average pool level, the response of Tongguan's elevation to annual runoff and the channel slope at the tail reach of the reservoir response to the annual average pool level. The results indicate that the proposed theoretical model is capable in expressing the characteristics of reservoir deposition.