摘要
应用积分湿度指数、干湿指标和线性回归等方法分析辽宁省大石桥地区农业生长季的旱涝程度及水分供需变化。结果表明,该地区降水量呈下降趋势,其中年降水量趋势减少170mm,春季趋势减少10mm,夏季趋势减少114mm,秋季趋势减少47mm。与农业需水相比,生长季缺水35mm,降水量满意程度趋势下降37.7%,干旱指数趋势降低0.345;作物生长季的气候类型从偏湿润向偏干旱转变,春、秋2季转为中旱气候类型,1980年以后干旱概率增加。
The methods including integral humidity index,dry and wet index and linear regression were applied to analyze the change of drought and waterlogging degree and water supply and demand in Dashiqiao area of Liaoning Province in agricultural growing seasons.The results indicated that the precipitation of this area showed decreasing trend;the annual precipitation trend was reduced for 170 mm and the precipitation trends of spring,summer and autumn were reduced for 10,114 and 47 mm resp.Compared with agricultural water demand,the water deficit in growing seasons was 35 mm,the content extent tendency of precipitation and the drought index trend were decreased by 37.7% and for 0.345 resp.;the climate type of growing seasons of crops was changed from partial moisten to partial drought,that of spring and autumn were transferred to be moderate drought climate type and the drought probability was increased since 1980.
出处
《安徽农业科学》
CAS
北大核心
2010年第26期14541-14543,共3页
Journal of Anhui Agricultural Sciences
关键词
积分湿度指标
旱涝指数
趋势变化
大石桥
Integral humidity index； Drought and waterlogging index； Change of trend； Dashiqiao；
