摘要
塔里木河流域受自然及人为因素的影响，局部地区生态退化问题突出，从景观生态学的干扰性质理论和恢复生态学的观点出发，选择水资源系统、土地资源系统及植被资源系统及其10个综合性敏感因子对流域生态的敏感性及恢复力进行分析，并确定敏感因子的定量指标，定性代码及其权重和阈值，通过算术对数插值对敏感因子实际值进行规范化处理，并构建生态胁迫度。结果表明，塔里木河三源流阿克苏河流域、叶尔羌河流域、和田河流域及于流区的上、中、下游区生态胁迫度分别为0．13、0．25、0．30、0．31、0．57及0．84，在评价分级标准的限定下，其对应的生态脆弱性程度依次为轻微脆弱、一般脆弱、一般脆弱、一般脆弱、中等脆弱及严重脆弱。
Affected by natural and artificial factors, ecological environment degradation is very serious in some areas of Tarim RoverBasin Based on the interference features and the theory of landscape ecology and the priciples of restoration ecology, waterresource system, land resource system and vegetation resource system as well as their ten complex susceptible factors arechosen to analyze the susceptibility and renewable potentialies. Meanwhile, quantitative indexes, qualitative codes, weight(Ci) and threshold values (Ti) are decided. The actual values of the ten susceptible factors (ai) are standardized. Furthermore, ecological stree degree model (DS) is built. As a result, the stress degrees of the three source-stream, the AksuRiver Basin, Yarkant River Basin and Hotan River Basin are 0. 13, O. 25 and O. 3O respechvely, meanwhile, the stress de-grees of the three sections of the main-stream, up-stream, nid-stream and down-strem are 0. 31, O. 57 and O. 84 re-spectively. Under the Stardard of the ecological vulherability classification, the ecological vulnerability degrees of the six ar-eas belong to slight vulnerability, general vulnerability, general vulnerabliity, general vulnerability, mid-vulinerability andsevere vulnerability respectively in turn.
出处
《干旱环境监测》
北大核心
1998年第4期218-223,共6页
Arid Environmental Monitoring
关键词
塔里木河流域
生态脆弱性
生态评价
景观生态
Tarim River Basin
Ecological vulnerability
Susceptible factor
Assessment system
Stress degree
