摘要
为了研究通江湖泊与外部江河的水沙交换过程,运用基于有限体积法的二维非稳态水流和泥沙耦合数学模型,对平水年水文条件下鄱阳湖的水沙交换过程进行了数值模拟。结果表明：鄱阳湖与上游五河、下游长江的水沙交换在时间上分布不均,主要集中在3~8月。计算得出2010年上游五河入鄱阳湖水量和泥沙量、鄱阳湖入下游长江水量和泥沙量以及全年长江倒灌入湖水量和沙量。倒灌入湖水沙量分别占出湖水量和沙量的4.88%和12.35%。研究成果为鄱阳湖水环境保护工作提供了重要参考。
To investigate the water- sediment exchange process between the river- connected lake and its external rivers,the water- sediment exchange processes of Poyang Lake in an average water year was simulated by using a finite volume 2- D water- sediment coupled model. The results showed that the water- sediment transport between Poyang Lake and the external rivers were uneven in temporal scale,the most occurred during March to August. The water volume and the amount of suspended sediments entering into Poyang Lake from the upper five main rivers,flowing out from the lake and entering into the Yangtze River and back- flowing into the lake from Yangtze River in 2010 were calculated respectively. The water volume and sediment back-flowing into the lake from the Yangtze River account for 4. 88% and 12. 35% of that flowing into Yangtze River,respectively.The study provides an important reference to the water environment protection of Poyang Lake.
出处
《人民长江》
北大核心
2016年第12期37-41,共5页
Yangtze River
基金
国家自然科学基金项目"通江湖泊复杂水沙环境下镉的三相交换机制"(51309082)
关键词
水量
有限体积法
水沙交换
鄱阳湖
长江
water volume
FVM
water-sediment exchange
Poyang Lake
Yangtze River
