生态恢复目标下的生态需水内涵探讨

DISCUSSION ON THE CONNOTATION OF ECOLOGICAL WATER REQUIREMENT UNDER THE TARGET OF ECOLOGY RECOVERY

关键词:  生态需水  进展与问题  内涵  生态恢复  植被恢复

Key words:  ecological water requirement,progress and problems,connotation,ecology recovery,vegetation recovery

摘要:

随着生态环境破坏的日趋严重,生态需水问题日益引起生态学、水文学、农业气象学等领域科学研究人员的高度重视。该文分析了国内外生态需水问题的研究进展与存在的问题,审视和提出了生态需水的概念,认为生态需水是生态系统达到某种生态功能水平或者维持在某一动态平衡状态所需要的水量;对于不同的地区和不同的生态目标,生态需水量及其阈值不同。以此为基础,进一步探讨了干旱半干旱地区生态恢复及植被恢复与生态需水的关系。

Abstract:

Along with the tendency of continuous deterioration of ecological environment day by day,the issue of ecological water requirement has aroused high attention by the research scientists from the fields of ecology,hydrology and agro-metrology.This paper analyzes the research progress and existing problems on ecological water requirement at home and abroad;scans and raises the concept of ecological water requirement.It believes that ecological water requirement is a water quantity required when the ecological system has reached certain ecologically functioning level,or has maintained in a certain homeostasis.The water requirement and its threshold value are different at different regions and under different ecological targets.On this basis,it further discusses the relations between ecology recovery of arid and semi-arid regions and vegetation recovery with ecological water requirement.