嘉陵江入汇对长江干流水流特性的影响研究

Study on influence from confluence of Jialingjiang River on flow characteristics of Mainstream of Yangtze River

由于长江干流与其支流——嘉陵江的集雨区域不一样,加上其西部山区洪水暴涨暴跌的特性,该支流汇流比的变化范围非常宽。在此背景下,借助原型观测数据分析以及二维数模计算,研究嘉陵江汇流比变化对长江干流河段水流特性的影响规律。本文研究结论将为研究河段的河流研究提供有益的理论依据与技术支撑,同时也能为相似河段的分析研究提供思路借鉴。

As the catchment area of the mainstream of the Yangtze River is different from that of its tributary——Jialingjiang River,additionally,the flood from the its western mountainous region has the characteristics of suddenly rising up and sharply falling down,thus the variation range of the confluence ratio of the tributary is quite wide. Under this background,the law of the influence from the variation of the confluence ratio of Jialingjiang River on the flow characteristics of the mainstream of the Yangtze River is studied herein by means of the analysis on the prototype observation data and the calculation with a 2-D mathematical model. The conclusion from this study can provide helpful theoretical basis and technical support for the river research on the studied river reach,meanwhile,provide a thinking reference for the study and analysis on the similar river reach as well.