【摘要】 干旱是影响河南省农业生产的主要气象灾害。在美国帕尔默旱度模式基本原理和方法的基础上,采用非饱和土壤水分一维数值模拟模型得到初始土壤含水率,根据河南省1970～2000年30 a的历史干旱记录和实际气候特点,利用河南省19个代表站的气象要素和土壤水分资料,首次建立了适合于河南省的PDSI旱度模式,并与实际的旱情记载进行了对照验证。结果表明:根据河南省帕尔默旱度模式计算的旱度值与实际旱情基本吻合,河南省帕尔默旱度模式能较好地反映出该省大部分地区的干旱程度。本研究结果可为进一步分析和研究河南省的干旱基本特征,开展防灾减灾工作提供科学依据。更多还原

【Abstract】 Drought is one of major meteorologic disasters in agricultural production in He’nan province.Based on the principles of Palmer Drought Severity Index(PDSI),and initial soil moisture content get by unsaturated soil flow one-dimensional numerical simulation model,according to a 30-year historical dry record and the actual climate characteristics,using the soil moisture and meteorologic observation datas of 19 representative stations in He’nan province,the PDSI for He’nan province was established.The results showed that drought degree calculated by PDSI model was basically consistent with the actual drought,and the PDSI model could reflect the extent of drought in most areas of He’nan Province.The scientific basis for analysing the basic characteristics of drought in He’nan province and carrying out the disaster prevention and mitigation measures was provided.更多还原