摘要
基于三峡库区及周边地区1973—2002年34个气象站点的基本气象数据,计算出各气象站的多年平均气温、大于10℃积温、干燥度、年降水量和年降水变率等。对这些气候指标利用“回归分析+残差修正”的方法进行插值,生成100m×100m的栅格数据,然后利用层次分析法(AHP)建立三峡库区的气候综合评价模型,对三峡库区气候进行综合评价,共分为8个等级。结果表明:三峡库区水热资源丰富,年均温主要在12～19.12℃之间,大于10℃积温平均为4794.56℃,干燥度小于1,年降水量主要在1100～1500mm之间,年降水变率较小,主要在10%～15%之间。气候综合评价等级平均为5.3级,西南部、中部地区气候条件较东部地区好。东部地区气候评价等级最低,小于5级。中部地区气候南北差异较大,河流北岸气候等级在5级以上,气候条件较好;河流南岸相对较差,等级在4～6级之间。西南部地区气候条件最好,评价等级都在6级以上。
Based on the meteorological data about the 34 meteorological stations during the period of 1973 and 2002 in the Three Gorges Reservoir Area,annual mean temperature,accumulated temperature 〉10℃ ,aridity index,precipitation and precipitation variability were obtained. ＂Multiple regression model ＋ Inverse Distance Weighting （IDW） residuals＂ was used to interpolate meteorological data,and climate thematic maps with a spatial resolution of 100m were produced.With the method of Analysis Hierarchy Process （AHP）,the model of integrated climate assessment in the Three Gorges Reservoir Area was established.The results showed that, the water and heat resource was rather abundant,the annual mean temperature was mainly between 12℃ and 19.12℃ ,accumulated temperature 〉10℃ was 4794.56 ℃ ,aridity index was less than 1.The annual precipitation was mainly between 1 loomm and 1 500mm,and the precipitation variability was a range of 10% to 15% .The average value of integrated climate assessment in the Three Gorges Reservoir Area was 5.3.The climate in the southwestern and central part was better than that in the eastern.The climate grade of the eastern part was 5 which was the lowest. The climate in the central part was quite different between the south bank and the north bank of the river.The climate grade in the northern part was above 5,while it was between 4 and 6 in the southern part, and adove 6 the southwestern part.
出处
《自然资源学报》
CSCD
北大核心
2007年第4期613-622,共10页
Journal of Natural Resources
基金
科技部公益性项目"三峡库区陆地生态系统综合评价与预警"(2003DIB4J14)
国务院三峡办与国家林业局联合资助项目(SX2001-012)
国家林业局森林生态重点实验室基金。
关键词
气候
综合评价
GIS
三峡库区
climate
integrated assessment
GIS
Three Gorges Reservoir Area
作者简介
刘祥海（1980-），女（汉），山东日照人，硕士研究生，主要从事区域环境综合评价的研究。E-mail：lxm200211@tom．com
通讯作者
