CAJ | 학술논문

干旱频发已成为严重制约社会经济可持续发展的重要因素，但由于干旱形成机理复杂，影响因素众多，目前尚无公认普遍适用的干旱指数，因此寻找并构建适用于研究区的综合干旱指数成为当前研究的热点和重点。本文以滦河流域为研究对象，选取1960－1979年为研究期，通过对降水距平百分数、相对湿润度和由VIC模型的中间变量－土壤含水量计算得到的土壤相对湿度指数进行主成分分析，构建了适用于该流域的综合干旱指数，对研究期的旱情进行了评价，并与标准化降水指数（ SPI）、帕默尔指数（ PDSI）的评价结果进行比较，验证其适用性。结果表明：基于VIC模型的综合干旱指数能较好地评价滦河流域历史旱情。该研究在提升海河流域干旱监测和评价能力方面具有一定的理论与实用价值，也为其它流域的干旱评价具有参考价值。
간한빈발이성위엄중제약사회경제가지속발전적중요인소，단유우간한형성궤리복잡，영향인소음다，목전상무공인보편괄용적간한지수，인차심조병구건괄용우연구구적종합간한지수성위당전연구적열점화중점。본문이란하류역위연구대상，선취1960－1979년위연구기，통과대강수거평백분수、상대습윤도화유VIC모형적중간변량－토양함수량계산득도적토양상대습도지수진행주성분분석，구건료괄용우해류역적종합간한지수，대연구기적한정진행료평개，병여표준화강수지수（ SPI）、파묵이지수（ PDSI）적평개결과진행비교，험증기괄용성。결과표명：기우VIC모형적종합간한지수능교호지평개란하류역역사한정。해연구재제승해하류역간한감측화평개능력방면구유일정적이론여실용개치，야위기타류역적간한평개구유삼고개치。
Drought is a recurring phenomenon and increasingly become a critical constraint to the sustain -able development of social economy .Due to the complexity of drought , there is no a common drought in-dex so far .Therefore , it become a hot and key to contruct an appropriate composite drought index in the study site .Taking Luanhe river basin as study object and selecting 1960 to 1979 as study period , the pa-per calculated relative soil moisture index based on the simulated daily soil moisture and obtained the rel-ative soil moisture by using VIC model , and built a new composite drought index ( CDI ) based on the Principal Component Analysis(PCA).After evaluating the drought situation in Luanhe River basin , the monthly CDI was compared with the Standardized Precipitation Index ( SPI) and Palmer Drought Severity Index ( PDSI) respectively to test the feasibility of newly proposed .The result revealed that the CDI based on VIC can better evaluate the historic dry situation in Luanhe river basin .Theresult can not only provide theory and practical value for the improvement of drought monitoring and assessment in Haihe River basin but also has reference for the evaluation in other river basins .