干旱区地下水位降幅对天然植被衰退过程的影响分析——以新疆鄯善南部绿洲群为例  

Analysing the Effects of the Depth Downrange of Groundwater on Nature Vegetation Degeneration in Arid Area—A Case from South Oases of Shanshan,Xinjiang

作　　者：周绪[1] 刘志辉[1] 戴维[1] 菊春燕[1] 王云丰[1] 

机构地区：[1]新疆大学资源与环境科学学院,乌鲁木齐830046

出　　处：《水土保持研究》2006年第3期143-145,共3页Research of Soil and Water Conservation

基　　金："新疆吐鲁番盆地地下水可持续利用研究"(70361001)

摘　　要：综合运用RS、GIS及地理统计学的理论、技术，监测干旱区地下水位降幅对天然植被衰退过程的影响。结果表明：研究区内大部分绿洲位于20-30m降幅之间，并由北向南呈环状递减；天然植被覆盖变化敏感区域居于5～8m降幅之内，超过10m降幅将出现严重退化区;天然植被大面积向绿洲东北方向退缩，15年间典型研究区天然植被面积减少近1／2，半固定沙丘面积增大而将成为新的沙尘策源地，绿洲生态环境更为脆弱。By integratively using RS,GIS and Geostatistics, the effects of downrange of the groundwater depth on nature vegetation degeneration in arid area were analyzed. The results showed that： （1）most of oases lied in 20-30 m of the downrange of groundwater depth which were decreased as circus from north to south in study area; （2）there were the sensitive region in 5-8 m and severe decline area over 10 m; （3）distributing region of nature vegetation countermarched from southwest to northeast, and its reduced area was closed to 50% for 15 years, the expanded semi-settled dune will be a new sandy headstream, so the state of local environment will be extremely frail and unsteady.

关 键 词：地下水位降幅 天然植被衰退 RS GIS 

分 类 号：S718.5[农业科学—林学]