水利水电技术2017，Vol.48Issue(2)：12-21,10.DOI:10.13928/j.cnki.wrahe.2017.02.003
森林植被改善对鄱阳湖流域径流和输沙过程的影响
Effect from forest vegetation improvement on runoff and sediment transport processes within Poyang Lake Watershed
摘要
Abstract
Starting from river base-flow,the mechanisms of themicroscopic effects from the runoff regulated by vegetation,water and soil conservation,etc.on the macroscopic effects from the runoff process and the water and sediment process of large-medium sized rivers and lakes within a watershed are studied herein.In the past 60 years,no any trend changes of natural precipitation are there in Poyang Lake Watershed.The forest coverage increases from 34.73％ to 63％ with the enhancement of the quality,while the base-flows from Ganjiang River,etc.into the lake are increased by 83 m3/s with the decrease of the river sediment load.The precipitation runoff coefficient is increase after 2000,if compared with that before 2000,and then the annual flow hydrograph is flatted and reduces the flood risk to a certain extent,thus is favorable for the utilization of water resources and the eco-environment protection.After 2001,the inflow-sediment into Poyang Lake is averagely reduced by 1 007 × 104t every year,while the outflow sediment is increased by 314 × 104 t.Therefore,the water channels from Poyang Lake to the river are converted from sedimentation to erosion,but there is no trend change of the hydrograph of the outflow from the lake.关键词
水文生态学/森林/河流基流/径流过程/河流输沙量/湖泊冲刷/基流系数Key words
hydroecology/forest/river base-flow/runoff process/river sediment discharge/lake erosion/base-flow coefficient分类
农业科技引用本文复制引用
唐国华,许闻婷,胡振鹏..森林植被改善对鄱阳湖流域径流和输沙过程的影响[J].水利水电技术,2017,48(2):12-21,10.基金项目
国家自然科学基金项目(41261053) （41261053）
江西省科技创新团队项目(20133BCB24015) （20133BCB24015）
