作　　者： (吴凤珠）; (张宝）; (王力）;

机构地区： 贵州省台江县气象局,贵州台江556300

出　　处： 《贵州气象》 2017年第4期63-67,共5页

摘　　要： 基于台江县气象观测站1970年1月—2015年12月逐年、逐月降雨量、雨日资料,采用线性趋向、累计距平等方法分析了台江县年、季降雨量和雨日变化趋势,结果表明:台江县近46 a年平均降雨量呈减少趋势,雨日显减少趋势,除暴雨及以上量级雨量呈增加趋势外,其余量级为减少趋势,降雨量、雨日及量级雨量的趋势均说明降雨越来越集中,发生强降雨的频率在增大,从而易引发的气象灾害将对人类的生产和生活产生不利的影响;四季降雨量和降雨日数分布不均且呈减少趋势,其中春季和秋季降雨日数呈显著减少趋势,且夏和秋两季出现强降雨的频率较大,秋季降雨量及降雨日数减少趋势率均为最大,秋旱发生的概率相对增大;年平均夜间降雨量大于年平均白天降雨量,在春季的4月最为明显,降雨强度夜间大于白天;逐年降雨侵蚀力及其降雨引起的土壤侵蚀潜能呈增加趋势。 Based on the yearly, monthly rainfall and rain data of Taijiang County Meteorological Observatory from January 1970 to December 2015 ,the annual and seasonal rainfall and rainy days of Taijiang County were analyzed by linear trend and cumulative distance method. The results show that the average annual rainfall in Tajiang County is decreasing in the past 46 years, and the rainy above the amount of rainfall showed an increasing trend fall, rain and magnitude rainfall indicates that rainfall is so that meteorological disasters that are easily tri The rainfall and rainfall days in the four seasons ggered day shows a decreasing trend. In addition to heavy rain and , the rest of the order to reduce the trend. The trend of rain- increasing and the frequency of heavy rainfall is increasing, will have a negative impact on human production and life. are uneven and the trend is decreasing, and the number of rainfall days in spring and autumn is obviously decreasing, and the frequency of heavy rainfall in summer and autumn is larger. The decreasing trend of rainfall and rainfall days in autumn is the largest, and the probability of autumn drought is relatively increased. The average annual nighttime rainfall is greater than the average annual rainfall in the day, the most obvious in April. And rainfall intensity night is greater than the daytime. The annual erosion potential and the soil erosion potential caused by rainfall are increasing.

关 键 词： 降雨特征 降雨侵蚀力 台江