摘要
分析流域降雨径流关系对于区域水资源规划管理有重要意义。以蚁蚂吐河流域为例,采用统计学方法,分析1956~2018年下河南水文站降雨-径流关系变化趋势,结果表明蚁蚂吐河流域降雨年际变化不明显,呈缓慢减少趋势,但径流深呈显著下降趋势且变化幅度大幅减小。通过M-K检验、双累积曲线法分析,降雨径流关系发生突变的年份为1998年,1998年以后径流系数显著减小。选择1998年前后典型年进行分析,月径流变化幅度减小,汛期产流量明显减小。初步分析是由于汛期降雨量减少,流域内植被覆盖度大幅提高、水土保持工程大量增加,造成蚁蚂吐河流域下垫面条件改变,共同影响降雨径流关系。
The analysis of rainfall-runoff relationship in watershed is of great importance to the planning and management of regional water resources.This paper takes the Yimatu River Basin as an example,and uses statistical methods to analyze the change trend of precipitation-runoff relationship in the Xiahenan Hydrological Station from 1956 to 2018.According to statistics»the precipitation in the Yimatu River Basin remained stable.but the trend of runoff depth is obvious.Through Mann-Kenddall test and double accumulation curve method analysis,the year of abrupt change of rainfall runoff relationship is in 1998,and runoff coefficient decreased significantly after 1998.Based on the analysis of the typical years around 1998,the monthly runoff variation is decreased,and the runoff in flood season is obviously reduced.The preliminary reason is that the precipitation in flood season is reduced and the vegetation coverage of the basin is greatly improved.The soil and water conservation project has increased greatly,which has caused great changes in the conditions of the underlying surface of the basin,and has an impact on the rainfall-runoff relationship.
作者
张文
ZHANG Wen(Hydrology and Water Resources Suruey Bureau of Hebei Province,Shijiazhuang 050031,China)
出处
《水电能源科学》
北大核心
2020年第7期8-10,33,共4页
Water Resources and Power
关键词
蚁蚂吐河
下河南水文站
降雨-径流关系
趋势分析
突变年份
Yimatu River
Xiahenan hydrological station
rainfall-runoff relationship
trend analysis
mutation year
