欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
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。
英文摘要：
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 .
同期刊论文项目
同项目期刊论文
期刊信息
位置：