JOURNAL OF NATURAL RESOURCES ›› 2007, Vol. 22 ›› Issue (4): 613-622.

• Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS •

Integrated Assessment of Eco-environment in the Three Gorges Reservoir Area Based on GIS and DEM Ⅱ. Climate Assessment

LIU Xiang-mei1,2, GUO Zhi-hua1, XIAO Wen-fa1, WANG Jian-li2, YANG Hai-ming1,2, HE Hong-yan1

1. 1. The Institute of Forest Ecology,Environment and Protection,Chinese Academy of Forestry,Beijing 100091,China;
2. School of Geographical Science,Southwest University,Chongqing 400715,China
• Received:2006-09-07 Revised:2007-02-27 Online:2007-08-25 Published:2007-08-25

Abstract: 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 inter-polate 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 100mm 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.

CLC Number:

• P42