摘要
根据1962—2019年沂河流域7个站点的日降水资料,运用ArcGIS空间插值、小波分析、重标极差分析(rescaled range analysis, R/S)等方法,分析降雨量及降雨侵蚀力时空变化。结果表明:沂河流域及各站点降雨量与降雨侵蚀力相关性均为正;沂河流域降雨量与降雨侵蚀力年内分布不均,主要集中在夏季,分别占全年的64.28%和73.60%;沂河流域年均降雨量为764.33 mm,降雨侵蚀力为1 433.26 MJ·mm/(hm^(2)·h),年际总体呈波动下降趋势且未来两者均将延续历史减少趋势,两者均在1969年和1997年出现突变点且第一主周期分别为26 a和25 a;沂河流域降雨量和降雨侵蚀力在空间上均呈从东北到西南递增的趋势。
Based on the daily rainfall data of 7 stations in Yihe River basin from 1962 to 2019, the temporal and spatial changes of rainfall and rainfall erosivity were analyzed by ArcGIS spatial interpolation, wavelet analysis and rescaled range analysis(R/S). The results showed that the correlation between rainfall and rainfall erosivity in Yihe River basin and its stations was positive. The rainfall amount and rainfall erosivity in Yihe River basin were unevenly distributed throughout the year, mainly in summer, accounting for 64.28% and 73.60% of the whole year respectively. The average annual rainfall and rainfall erosivity in Yihe River basin were 764.33 mm and 1 433.26 MJ·mm/(hm^(2)·h), respectively. The trend of interannual fluctuation and decline would continue in the future. The abrupt points of the trends of rainfall amount and rainfall erosivity both occurred in 1969 and 1997, and their dominant period was 26 a and 25 a, respectively. The rainfall and rainfall erosivity in Yihe River basin indicated an increasing trend from northeast to southwest in space.
作者
张玉虎
赵强
艾明乐
桑国庆
赵思凝
ZHANG Yuhu;ZHAO Qiang;AI Mingle;SANG Guoqing;ZHAO Sining(School of Water Conservancy and Environment,University of Jinan,Jinan 250022,Shandong,China;School of Business,University of Jinan,Jinan 250022,Shandong,China)
出处
《山东大学学报（工学版）》
CAS
CSCD
北大核心
2023年第1期122-132,共11页
Journal of Shandong University（Engineering Science）
基金
国家自然科学基金资助项目(41471160)。
关键词
沂河流域
降雨侵蚀力
降雨量
小波分析
ARCGIS
时空变化
Yihe River basin
rainfall erosivity
rainfall
wavelet analysis
ArcGIS
temporal and spatial variation
