自然资源学报 ›› 2004, Vol. 19 ›› Issue (4): 519-524.doi: 10.11849/zrzyxb.2004.04.014

• 区域资源评价与管理 • 上一篇    下一篇

区域尺度绿洲稳定性评价

罗格平1, 周成虎2, 陈曦1, 周可法1   

  1. 1. 中国科学院新疆生态与地理研究所 新疆乌鲁木齐830011;
    2. 中国科学院地理科学与资源研究所,,北京100101
  • 收稿日期:2003-12-09 修回日期:2004-03-08 出版日期:2004-08-25 发布日期:2004-08-25
  • 作者简介:罗格平(1968~)男,湖南湘乡人,副研究员,博士,主要从事资源与环境、遥感与地理信息系统应用研 究,E-mail: luogp@ms.xjb.ac.cn
  • 基金资助:

    中国科学院知识创新工程重要方向性项目(KZCX3-SW-326-03和KZCX3-SW-327-01);中国科学院新疆生态与地理研究所所长基金(20041041)。

Evaluation of the stability of the oasis at the regional scale

LUO Ge-ping1, ZHOU Cheng-hu2, CHEN Xi1, ZHOU Ke-fa1   

  1. 1. Xinjiang Institute of Ecology and Geography, CAS, Urumqi 830011,China;
    2. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101,China
  • Received:2003-12-09 Revised:2004-03-08 Online:2004-08-25 Published:2004-08-25

摘要: 论文在区域尺度上,探讨了绿洲稳定性的内涵,并以新疆三工河流域绿洲为例,从绿洲所处的地理位置、绿洲与外围荒漠和山地系统之间的相互作用等方面评价了绿洲的区域稳定性。结果表明:①冲洪积扇型绿洲稳定性最高,其次是位于地下水溢出带下方的冲积平原型绿洲,稳定性最差的是湖滨三角洲或散流干三角洲上发育的绿洲;②绿洲的冷岛效应和植被指数可较好地表征绿洲与外围荒漠和山地系统之间的相互作用和评价绿洲的区域稳定性的时间变化。绿洲规模的扩大及绿洲水分和植被的增加将加强绿洲的冷岛效应,提高绿洲的稳定性;归一化差异植被指数增加,表明绿洲内植被覆盖密度增大和植物生物量提高,绿洲的稳定性增强。

关键词: 绿洲稳定性, 区域尺度, 地理位置, 冷岛效应, 植被指数, 三工河流域绿洲

Abstract: This paper discusses the meaning of the oasis stability at the regional scale,and taking oasis of Sangong River Watershed as an example,analyzes the oasis stability from its geographic location and reciprocity between the oasis and its surrounding deserts and mountain systems.The results show that: (1)As long as the oasis moisture keeps stable and its efficiency gradually improves (at least no decline),which will result in continuous increase in primary productivity,and nonobviously decline (at least keeping relatively stable)of natural primary productivity,we can consider that oasis is stable and sustainable at the regional scale. (2)The main geomorphologic locations at which the oases can develop include alluvial-diluvial-fan,alluvial-plain and lake-shore delta or dry delta.From the capability of the oasis water capturing,the oasis in alluvial-diluvial-fan type is most powerful and its stability is the highest, next is the oasis in alluvial-plain type which stands below the overflow belt of groundwater,and the lowest is the oasis in the lake-shore delta type or dry delta type. (3)The cold-island effect and vegetation index of the oasis may be used to represent the in-teraction between the oasis and its surrounding deserts and mountain systems as well as the time change in the stability of the oasis.Enlargement of the oasis and increase of the moisture and vegetation in the oasis will certainly enhance the cold-island effect of the oasis,which is advantageous to increase the stability of the oasis.Conversely,the stability of the oasis will be redu-ced.When NDVI of the oasis increases,which indicates the increase of plant cover density and the primary productivity in the oasis,the stability of the oasis will enhance.Conversely,the stability of the oasis will be reduced.

Key words: stability of oasis, the scale of region, geographical location, cold-island effect, vege-tation index, oasis of Sangonghe River Watershed