水土保持学报2013，Vol.27Issue(2)：13-19,7.
策勒绿洲—沙漠过渡带风沙活动强度的空间分布特征
Spatial Distribution Characteristics of Sand Blown Activities Intensity on Cele Oasis-Desert Ecotone
摘要
Abstract
Through the research of contrast of wind regime and drift potential and resultant drift potential at the height of 2 meters and 10 meters of four different underlying surface between November 2010 and October 2011 on oasis-desert ecotone in Cele, combining with change situation of factual sand erosion and deposition on ecotone,it reveals that the RDP from mobile sandy land to oasis along prevailing wind direction were 26.21, 1.91, 3.44, 0.007 4 VU at the height of 2 meters and 54. 27, 31. 53, 28. 65, 2.40 VU at the height of 10 meters respectively. With the increase of vegetation coverage and protection strengthen of shelter forests in oasis from mobile sandy land to farmland, the wind power and DP and RDP decreased sharply especially in oasis. Mobile sandy land showed strong sand erosion accompanying with mobile dunes movement on the bare surface, semi-fixed sand land appeared a large of sand deposition because of lofty Tamarix ramosissima nebkhas chain upwind prevailing wind direction, it occurred slight sand deposition and sand erosion in one year as a whole on the verge of oasis of fixed sandy land because of high natural vegetation coverage. While, there nearly occurred sand erosion by influence of protection roles of shelter forests net in oasis and well soil moisture content on the surface. The DP of 2-meter-high decreased more obviously than that of 10-meter-high from mobile sandy land to oasis. It reveals that weakness degree on wind power by natural vegetation and shelterbelts near land surfaces were more than that on the height of 10 m open field. It shows that natural vegetation and shelterbelts can reduce wind power and make sand deposited around shrubs, which can represent intensity change of sand blown activities near surface.关键词
绿洲—沙漠过渡带/输沙势/风沙活动强度/空间分布特征Key words
oasis-desert ecotone/ sand drift potential/ intensity of sand blown activities/ spatial distribution characteristics分类
农业科技引用本文复制引用
毛东雷,雷加强,曾凡江,李生宇,再努拉·热和木吐拉,王翠..策勒绿洲—沙漠过渡带风沙活动强度的空间分布特征[J].水土保持学报,2013,27(2):13-19,7.基金项目
国家科技支撑计划项目"塔里木盆地西南缘绿洲外围经济型生态屏障建设技术集成示范"(2009BAC54B01) （2009BAC54B01）
