关键词: 西部干旱区, 生态环境, 生态安全

Abstract: Drought and water-short as well as desertification type diversity caused ecological environment fragility. The area of water and soil loss is mainly distributed in loess plateau in the west region. Meanwhile, the area of water and soil loss is more than 330000 km² in the upper and middle reaches of Yellow River. The annual erosion modulus is between 2000 t/km² and 9000 t/km² generally. Land sandy desertification areas are 1371.22 km² in 1959 and 1494.29 km² in 1996 respectively in Alagan in the lower reaches of Tarim River. Moreover, the annual average growth rate of desertification is 0.24% during the period. The damage degree and loss of some natural disasters including sand-dust storm are increased gradually in the west arid zone. Depending on some measurements to ensure ecosafty in arid zone, which is the starting point and foothold of ecological construction in the west arid zone. From some aspects, such as, fund raising, technical support, building pattern, integral benefit and management form, the ways of ecological environment construction should be established in the west arid zone.

Key words: West arid zone, ecological environment, ecosafty