Analysis of Variation Trends and Cause of Runoff and Sediment in Yihe River Basin
In order to reveal the cause for reduction of runoff and sediment in the changing environment,bases on the observed data in the past 50 years at Linyi hydrologic sation that reflects the hydrological variation trends of runoff and sediment in the Yihe River Basin,through several non-parameter statistical methods such as the moving average check and the Mann-Kendall test,we analyzed the trends of runoff and sediment in the river basin.The results showed that the runoff evolvement and sediment transport at the Linyi Hydrologic station presented the significant decrease trend.In view of the major factors correlated with the runoff and sediment transport changes such as the rainfall,soil conservation,the sediment descending proportions caused by the reduction of rainfall and soil conservation were valuated based on the relationships between rainfall,water and sediment.According to the actual situation of Linyi City,the work of soil conservation and implement comprehensive management in the river basin should be continued to strengthen.
inter-annual variability of runoff and sedimenttrends testcause analysisYihe River Basin
国家科技期刊平台
NSTL
万方数据
维普
