摘要
近 5 0年来塔里木河上中游的水土开发活动 ,使得下游地区的来水骤减并中断有近 30年的历史 ,从而引发了下游绿色走廊的逐步走向衰败、土地荒漠化趋势加剧等生态环境恶化问题。本文在前人研究成果基础上 ,综合分析了塔河下游绿色走廊发生、发展的特殊性和特点 ,认为绿色走廊衰败主要有 5个主要因素 :绿色走廊自然生命过程的衰退 ;新生幼林发生和发育原生机制的中断 ;土壤盐分的累积和增加 ;水分条件持续恶化 ;人类开垦荒地、滥伐、滥挖等行为。通过成因分析认为 ,只有充分考虑到下游绿色走廊的特点及其衰败的原因 。
The exploitation activities of land and water resources in the upper and middle reaches of Tarin River during recent 50 years have resulted in the sharp reduction and 30 year cut off of stream, gradual decline of the green corridor, land desertification, deterioration of the ecological environment, etc. in the lower reaches. Based on the achievements in scientific research of our predecessors, this paper synthetically analyzes the characteristics of formation, development and decline of the green corridor at the lower reaches of Tarim River. It is considered that there are 5 main factors to cause the decline of the green corridor, i.e. the natural decline of life process of the green corridor, cut-off of the primeval mechanism of formation and development of the young growth, accumulation of salt in soil, continuous deterioration of moisture condition, and human's reclamation, severe deforestation and digging. It is considered that only by understanding the chara cteristics and the decline causes of the green corridor at the lower reaches of Tarim River can the green corridor be reconstructed.
出处
《干旱区研究》
CSCD
2001年第4期26-30,共5页
Arid Zone Research
基金
国家重点基础研究发展规划项目G19990 435 0 5 0 1资助
