暖干化趋势对本溪市可利用降水资源的影响分析  

Influence of Utilizable Precipitation Resources on Warming-drying Trend in Benxi City

作　　者：吉奇 赵雷 孙雪 黄莉丽 

机构地区：[1]本溪市气象局,辽宁本溪117000 [2]桓仁县气象局,辽宁桓仁117200

出　　处：《山西农业科学》2014年第2期162-165,共4页Journal of Shanxi Agricultural Sciences

基　　金：本溪市气象局科研项目(BQ2012001)

摘　　要：为了探讨暖干化趋势背景下本溪市水资源的变化特征,利用本溪市4个国家观测站1953—2010年的月平均气温和降水量等资料,运用线性倾向率、de Martonne干燥度、高桥浩一郎陆面蒸发等方法,对本溪市可利用降水资源进行分析。结果表明,本溪市呈明显的暖干化趋势下,可利用降水资源呈现随机性减少趋势,本溪市降水量的47%是可以利用的,53%被蒸发;夏季可利用降水占全年降水总量的73%,但夏季可利用系数最大,为55%;春季可利用降水占全年降水总量的10%,可利用降水系数只有32%。近58 a来,本溪市可利用降水以18.53 mm/10 a线性倾向率减少,与降水减少趋势相一致。To investigate change characteristics of the water resources under the background of warming and drying trend in Benxi city, using the monthly mean temperature and precipitation of 4 meteorological stations in Benxi city from 1953 to 2010 and methods of linear trend, de Martonne＇ dryness and Takahashi formala of land surface evaporation, the utilization precipitation was analyzed. The re- suits showed that under the significant warming and drying trend, utilizable precipitation had random decreasing trend, utilizable factor was 47% and evaporation 53%; the total evaporation was 73% in summer, utilization factor was 55% of maximum; utilizable precipitation was 10% in spring, and utilizable precipitation was 32%. Its linear trend was -18.53 mm/10 a in recent 58 years, which is consistent with the trend of reduced precipitation.To investigate change characteristics of the water resources under the background of warming and drying trend in Benxi city, using the monthly mean temperature and precipitation of 4 meteorological stations in Benxi city from 1953 to 2010 and methods of linear trend, de Martonne＇ dryness and Takahashi formala of land surface evaporation, the utilization precipitation was analyzed. The re- suits showed that under the significant warming and drying trend, utilizable precipitation had random decreasing trend, utilizable factor was 47% and evaporation 53%; the total evaporation was 73% in summer, utilization factor was 55% of maximum; utilizable precipitation was 10% in spring, and utilizable precipitation was 32%. Its linear trend was -18.53 mm/10 a in recent 58 years, which is consistent with the trend of reduced precipitation.

关 键 词：暖干化 陆面蒸发 可利用降水 本溪市 

分 类 号：S161.6[农业科学—农业气象学]