水利水电技术（中英文）

在探明闽江下游天然河道河沙储量的基础上,分别从水动力作用和人为挖沙两个方面预测闽江下游河床演变的趋势,提出了基于水动力作用引发河床演变的"三类分区"假说和基于人为挖沙引发河床演变的"四区分类"假说,并分别给出了水动力和人为挖沙对河道关键断面水位变化规律的影响。研究结果表明:人为挖沙对闽江下游河道演变的影响大于水动力作用对天然河道的影响。闽江下游河床演变研究工作对其堤防安全、闽江口湿地保护、城市饮用水安全、跨江桥梁及沿江公路安全、航运和沿江城市污染物排放控制均具有重要意义。

Based on the proved river-sand reserves in the natural channel of the Lower Minjiang River,the evolution trend of the channel bed of the Lower Minjiang River is predicted from two aspects respectively,i. e. hydrodynamic effect and sand extraction,and then both the hypothesis of the"three classified zones"of the river evolution caused by hydrodynamic effect and the hypothesis of"four classified zones"of the river evolution caused by sand extraction are put forward herein,furthermore,the impacts from the hydrodynamic effect and the sand extraction on the water level changing law of the key section of the river channel are respectively given as well. The study shows that the impact from the sand extraction on the channel of the Lower Minjiang River is larger than that from the hydrodynamic effect. Generally,the study on the river channel evolution of the Lower Minjiang River has an important significance for the its dike safety,protection of the wetland in the estuary of Minjiang River,safety of urban drinking water,the safeties of river-crossing and river-along bridges and highways,safety of waterway as well as the urban pollutant emission control on the cities along the river.