CAJ | 학술논문

运用改进的综合气象干旱指数，根据洞庭湖流域19个气象站1961-2009年的实测气象资料，运用小波理论分析洞庭湖流域发生的干旱时间差异，并对洞庭湖流域的干旱特征进行空间格局分析。结果表明：从时间格局上，洞庭湖流域发生90％以上范围的干旱周期四季依次为：春季16 a，夏季13 a，秋季9 a，冬季16 a；在空间格局上，洞庭湖流域干旱发生程度整体上是以衡阳、邵阳，芷江、通道以西，石门、南县以北三个地区为中心向其四周递减；从季节尺度来看，整体上秋季干旱最为严重，冬季次之，春季干旱最轻。
운용개진적종합기상간한지수，근거동정호류역19개기상참1961-2009년적실측기상자료，운용소파이론분석동정호류역발생적간한시간차이，병대동정호류역적간한특정진행공간격국분석。결과표명：종시간격국상，동정호류역발생90％이상범위적간한주기사계의차위：춘계16 a，하계13 a，추계9 a，동계16 a；재공간격국상，동정호류역간한발생정도정체상시이형양、소양，지강、통도이서，석문、남현이북삼개지구위중심향기사주체감；종계절척도래간，정체상추계간한최위엄중，동계차지，춘계간한최경。
Based on the improved meteorological drought composite index and measured meteorological data from 19 meteorological stations in the watershed during the period from 1961 to 2009 , the time difference of the drought development in the watershed was analyzed through wavelet analysis , and the spatial pattern of the drought characteristics were analyzed .The results show that the primary cycles of drought that occurred in more than 90%of the coverage area in the watershed were 16 years in the spring , 13 years in the summer , nine years in the autumn , and 16 years in the winter; at the spatial scale , the most severe droughts occurred in the Hengyang-Shaoyang region , the western part of the Zhijiang-Tongdao region , and the northern part of the Shimen-Nanxian region , and the degree of drought decreased in the surrounding regions;and at the seasonal scale , the most severe droughts occurred in the autumn on the whole , followed by the winter , with the most slight droughts occurring in the spring .