摘要
分析区域降水变化特征可为区域水资源可持续开发利用提供科学依据、为防汛抗旱提供科技支撑。以沂沭泗流域为例,利用1960～2011年日降水资料和Mann-Kendall趋势检验法研究了该流域降水变化特征。结果表明,该流域降水量主要集中在汛期;20世纪70～90年代降水量相对较少,其他时期相对较多;降水量、有效降水特征量和极端降水特征量均具有减少的趋势,其中降水频率和年最大连续有效降水日数减少趋势显著。
Analysis of regional rainfall variation characteristics can provide scientific support for water resources sus- tainable utilization, flood control and drought resisting. Based on the daily precipitations from 1960 to 2011, variation characteristics of precipitation in Yi-Shu-Si Basin is analyzed by using the Mann-Kendall test method. The results show that the precipitation mainly concentrated in flood season; during the period from the middle 1970s to 1990s, precipitati- ons are more than the normal year, and in other periods precipitations are relatively less; there are increasing trends for precipitation, effective and extreme precipitation; precipitation frequency and annual maximum continuous effective pre- cipitation days has obviously decreasing trend.
出处
《水电能源科学》
北大核心
2012年第7期34-36,共3页
Water Resources and Power
基金
水利部公益性行业科研专项经费基金资助项目(200801027)
