陕西省降水量变化及其影响分析  

Influences On Changes of Precipitation in Shaanxi Province

作　　者：卫旭东[1] 刘引鸽[1] 缪启龙[2] 

机构地区：[1]宝鸡文理学院灾害监测与机理模拟陕西省重点实验室,陕西宝鸡721007 [2]南京气象学院资源环境系,江苏南京210044

出　　处：《水土保持通报》2004年第4期40-43,共4页Bulletin of Soil and Water Conservation

基　　金：国家重大基础研究发展规划项目 (G1 9990 43 50 5);陕西省自然科学基金项目(2002D06);陕西省教育厅重点项目(02Js038)

摘　　要：利用陕西省20个测站1951—2000年(4—9月)的降水资料,用相关统计方法,分析了陕西省降水量的变化特征,并对降水量进行了预测。结果表明,4—9月降水量呈减少趋势,尤以20世纪90年代降水量减少最为显著。预测表明21世纪前10a陕西省降水量有增加趋势。同时分析了降水变化对河川径流、沙漠化及水土流失的可能影响。Annual and monthly(April to September) precipitation data from 20 stations in Shaanxi Province for the period 1951 to 2000 are used in relative statistical calculations. The characteristics of rainfall stability and change revealed by these calculations are analyzed. Results show that average precipitation has changed little, but there have been short and long periods of the change, with change particularly evident in the 1990s. Precipitation trends are forecasted, and further analysis reveals that precipitation will tend toward an increase in the period 2001-2010. Finally, the influence of rainfall on river flow, soil and water loss and desertification are analyzed.

关 键 词：陕西 降水量 影响分析 河川径流 沙漠化 水土流失 

分 类 号：P426.6[天文地球—大气科学及气象学]