The Desertification of oasis and ITS Assessment Indicators
Desertification is one of important environmental problem in th e world. In this paper, the Minqin oasis were selected as an example to discuss the oasis desertification assessment indicators. According to our research resul t, the sandy desertification always occurs in the edges of oasis periphery which distance is 1-2km. Its obvious symbol is the reactivition of fixation and semif ixation dune on which grows the shrubs. In this study, the surface investigation assessment indicators were proposed. The assessment indicators include 5 aspect s. First is the developing status of shrub sand dune which include soil crust, d une density, dune height, percent of sand dune occupied the total area, the perc ent of the areas which were uncovered by plants on sand dune. The second are the soil physical, chemistry and biological characteristics. The third is the veget ation coverage, composition and regeneration. The forth is the landforms shape a nd its developing status. The last one is the human factors which include social and economic factors.
国家科技期刊平台
NSTL
万方数据
维普
