松花江水文站径流变化趋势分析

Songhua Rwiver hydrological station runoff trend analysis

松花江(三岔河口以上)是吉林省境内最大的一条河流。随着时间的推移,流域气候环境、下垫面条件发生了很大变化,径流特征也有所改变。以松花江干流上松花江水文站1956―2010年的实测径流序列为基础数据,根据水量平衡法将其还原至天然状态。在三性审查的基础上,采用年内分配不均匀系数、年内分配完全调节系数、集中度和集中期、变化幅度等指标分析松花江水文站径流年内分配变化规律;采用累积滤波器法和Kendall秩次相关法分析松花江水文站年径流的变化趋势。结果表明:松花江水文站径流年内变化较大,年内分配不均匀;年径流呈减小趋势,但减小趋势并不显著。

The Songhua River（Sancha River above） is the largest river in Jilin Province.Over time,the river basin climate,land surface conditions changed a lot,runoff characteristics have changed.Found runoff series in2010 on the basis of data,according to the water balance method to restore it to its natural state- hydrological station on the Songhua River to the Songhua River in 1956.On the basis of the three review on the use of uneven distribution coefficients of the year,the allocation year fully adjustable coefficient,concentration and centralization of the change rate and other indicators Analysis allocation Songhua River Hydrological Station Runoff variation;cumulative filter method and Kendall rank correlation analysis of trends times Songhua River Station in runoff.The results showed that：change the Songhua River hydrological station runoff years greater maldistribution year;annual runoff decreasing trend,but the trend was not significantly reduced.