沙漠—绿洲过渡带近地表风沙过程研究进展

受绿洲和沙漠景观格局的双重影响,沙漠—绿洲过渡带是一个对外界条件变化极为敏感的生态环境脆弱带。沙漠—绿洲过渡带近地表风沙过程及其动态演变直接影响绿洲的稳定和有序发展,在空间上制约沙漠的进退或绿洲的变迁。从沙漠—绿洲过渡带局地小气候、沙尘暴、风沙环境、土壤风蚀、风沙输移和绿洲防护体系建设等几个方面比较全面地综述了近数十年来沙漠—绿洲过渡带近地表风沙过程研究进展,并基于当前沙漠—绿洲过渡带生态环境建设与地方需要等面临的实际问题,分析了该领域今后的研究重点和发展趋势。

Research Progress on Aeolian Sand Process Near Ground in Oasis-Desert Transitional Zone

Controlled by the landscape pattern of oasis and desert,the oasis-desert transitional zone is very sensitive to the change of environmental conditons. The processes of wind-blown sand in the oasis-desert transitional zone have direct impact on the stability and development of oasis. Local circulation and microclimate induced by the gradient differences of environment factors between oasis and desert such as vegetation, relief, underlying surface, hydrographic and meteorological factors and so on have restricted the back and forward of desert or the transition of oasis. This paper summarizes the latest research achievements in such six aspects that include local climate, soil erosion, sand storms, aeolian environments, sand transport and prevention system of sand damages. It is expected to solve the problems of sand damages and ensure ecological safety of oasis. Moreover, it will provide scientific evidence for establishing the oasis-protection system in arid region,which is both significant in theory and in practice.