摘要
基于舞水河流域内部及周边三个气象站1958-2013年的逐日降水资料,采用非参数检验法（Mann-Kendall）对流域的年降水量、月降水量、最大连续降水量及不同量级降水天数进了趋势检验,并采用Sen氏斜率方法计算了各降水要素的气候倾向率。研究结果表明近56年来,舞水河流域的年降水量呈现不显著的下降趋势;月降水量在1、3、6月份呈现上升趋势,在4、5、8、10、11、12月份呈现下降趋势,2、7、9月份几乎无趋势性;连续1~7d和10d最大降水量呈现增大趋势,但只有铜仁站1日最大降水量显著增大;发生降水的天数呈现显著下降趋势,主要是由于发生小雨天数的显著下降。
Based on the daily precipitation data from three stations in or around the Wushui River Basin during 1958-2013,the changes and trends of the precipitation were analyzed in this study in using of Mann-Kendall test and method.The result shows that：annual precipitation has a non-significant downtrend during 1958-2013;Monthly precipitation decreased in April,May,August and October to December while increased in January,March and June;Maximum 1day to 7days and 10 days precipitation shows an increasing trend and trend of the maximum 1day precipitation statistically significant at Tongren station;Precipitation days presents significant decline trend because of the remarkable dropping of light rain days.
出处
《节水灌溉》
北大核心
2015年第9期79-82,共4页
Water Saving Irrigation
基金
国家自然科学基金项目(51279211)
