赣江水沙特征及其变化规律

利用赣江外洲水文站1957 ～2010年径流量与悬移质泥沙输沙量监测资料,分析赣江水沙特征及其变化规律,结果表明:(1)赣江年径流量在近50多年来经历了先增大后减小的变化过程,自1998年起的近十几年显著减小;(2)赣江入湖年输沙量在近50多年来也经历了先增大后减小的变化过程,1991年起赣江年输沙量快速、大幅减小;(3)赣江年输沙量与年径流量相关点群均呈双层分布,年输沙量与年径流量和洪峰流量乘积的相关关系较密切,所建立的年输沙量经验公式比未加入洪峰流量的经验公式的准确性明显提高,实用性更强.

Water and sediment characteristic and its changing pattern in Gan river

Analysis Water and sediment characteristic and its changing pattern in Gan river using the monitoring data of annual runoff and suspended sediment transport from 1957 to 2010 of Waizhou Hydrological Station in Gan river. The results showed that:(1) Gan River Annual Runoff in nearly 50 years experienced increased first and then decreased with the change process, since 1998 in recent ten years, a significant decrease appear.(2) The sediment into the lake of Gan River in nearly 50 years has also experienced the first increased and then decreased with the change process, the annual sediment discharge of Gan River reduced greatly since 1991.(3) Ganjiang annual sediment discharge and annual runoff showed a double distribution, the relation of annual sediment discharge and in size the correlation between volume and peak flow product even more close. The annual sediment yield was significantly higher than the accuracy of empirical formula, empirical formula without peak flow, more practical.