摘要
研究区地处干旱和湿润气候的过渡地带，这一地区导致干旱发生的直接原因是干旱的气候和水资源的短缺，主要就是降水量的偏少。从简单实用角度考虑，本文根据唐山地区1956-2005年的水文和气象资料，采用降水距平、径流系数、地表湿润度指数等指标对唐山地区的干旱演变趋势进行分析，揭示出该地区近50年的干旱演变特征。
The study area is located in a transition zone between add and humid climate,where the direct cause of leading to drought is the dry climate and shortage of water resources, especially the lack of precipitation. According to the meteorological and hydrological data from 1956 to 2005, this paper analyzed the characteristics of drought change in Tangshan region by using percentage of precipitation anomaly, runoff coefficients and surface humid index.
出处
《水文》
CSCD
北大核心
2010年第1期93-96,共4页
Journal of China Hydrology
关键词
干旱
降水距平
径流系数
地表湿润度指数
演变特征
唐山地区
drought
percentage of precipitation anomaly
runoff coefficient
surface humid index
characteristics of evolution
Tangshan region
