中文摘要：

分析了楚雄市1965—2010年的降雨特点,采用同时期城区（楚雄站）与郊区（南华站、双柏站）雨量横向对比和城市化发展不同时期同一站雨量纵向对比的方法,研究了城市化对年降雨量、季节雨量和不同类型降雨发生次数等的影响。通过研究发现：城市化发展对城市年雨量、汛期雨量有不同程度的增加作用;受城市化发展的影响,降雨年内分配集中雨季的趋势更加明显;城市化发展使不同类型降雨发生次数有增加或减少,对大雨和暴雨有增加作用,小雨和中雨有所减少。城市化发展使城市大雨和暴雨增多,所以要加强城市洪涝、滑坡和泥石流灾害的防治工作。

英文摘要：

This article analyzes the rainfall characteristics in Chuxiong of Yunnan from 1965 to 2010,makes a comparison between urban（Chuxiong city） and rural（Nanhua county,Shuangbai county） areas during the same period,and a comparison of the precipitation in the urban area from year to year.Through these comparisons,the essay researches the impact of urbanization on annual rainfall,seasonal rainfall and the frequency of different types.The results show that： urbanization has increased the annual rainfall and flood season rainfall at different levels,the trend that the rainfall centralized in rainy seasons has become more obviously,urbanization has increased the frequency of heavy rain and storms,while reduced of light rain and moderate rain.Therefore,it is a must to strength the prevention works of flooding,landslide and the debris flow disasters which most probably caused by urbanization.