In the initial period of industrialization a great deal of land is needed for Chinese industry development as well as land resource per person of China is much
Debris flow is one of the most destructive phenomena of natural hazards. Recently, major natural haz-ard, claiming human lives and assets, is due to debris flow
Based on the data of resources, environment and foundation of production, applying principal components-clustering quantitative analysis, this article divides t
“West Jilin Porovince” in ths paper means Zhenlai,Baicheng,Taonan,Da'an,Tongyu,Fuyu,Songyuan,Qian'an ,Chandling,also includes Gongzhuling,Shuangliao,