人类活动对黑河水文过程的影响分析

本文以黑河流域年降水序列为参照,利用小波分析方法对黑河年径流序列的周期性变化进行分析,利用Spearman秩次分析法对比检验了黑河年径流序列的趋势性,利用有序聚类分析法推估了人类活动对黑河年径流序列的显著干扰年份。结果表明:黑河流域年降水序列和河流年径流序列存在着多时间尺度周期;距平累积分析表明,1965年以前黑河山口以上年径流序列的趋势性较显著,1971以后对河流入渭年径流序列的趋势性较显著;黑河入渭年径流序列显著突变年份在1979年。

Analysis on Hei River's Hydrology Process Influence occurred by People's Activities

Trend and transition of hydrology sequences are the important content in hydrology and ecology research.Taking Xi'an area's precipitation sequence as consult,the tendencies of hydrological sequences of Xi'an area runoff are examined by wavelets,pile wave strainer and Spearman correlative analysis method.The transition points of the hydrology sequences,which enjoyed by suburb agriculture and towns,are estimated by using cluster technique method.The results show that,the precipitation sequence and river sequence are comprising time-scales,and long time-scale are containing short time-scale.the main factor that affected the runoff of Heihe river was the agriculture activity in upwards cols before 1965 and that were using water enjoyed by city,suburb agriculture hereinafter cols from 1971.The disturbing year of Hei river's hydrology sequences which was joining the Wei river occurred in 1979.