生态系统变化对岩溶水资源的影响--以湘西为例

岩溶水资源是支撑岩溶区社会经济发展最为重要的一个基本方面，明确生态系统变化是如何影响岩溶水资源的质与量这一重大问题，将有助于岩溶水循环机制的深入研究，为揭示岩溶水资源的形成、演化规律及控制机理，建立岩溶水资源评价、开发利用和保护的系统理论，探索岩溶水资源可持续利用模式提供科学的依据。在分析岩溶山区典型生态系统类型及其演化特征和岩溶水资源特点的基础上，通过湘西20年来的生态系统变化的对比，就其对岩溶水资源的影响进行了详细的论述。认为生态的恶化是引起岩溶石山区水资源短缺的一个重要因素，生态系统变化对岩溶水资源的影响主要是通过对岩溶水的补给、径流、排泄等的影响，使岩溶水资源产生水质和水量的变化。

EFFECT OF ECOSYSTEM ON WATER RESOURCE IN KARST AREA--A CASE STUDY IN WEST HUNAN

The water resource is one of the most important basic aspects in supporting social economy development in karst areas. The scientific foundation will be offered for disclosing the law and the controlling mechanism of the formation and evolvement of water resource in karst areas for building the system theory of evaluation, exploitation and protection of the water resource, and for exploring the sustainable utilization models of the water resources. Based on the analysis of the typical kind of ecological system and its evolvement characteristics in karst mountain area and the characteristics of karst water resource, the changes of ecosystem in last 20 years in West Hunan,and the effects of ecological system on karst water resources are discussed in detail. It is considered that the worsening of ecological system is an important factor in the lack of water resource in karst mountain area, and the ecological environment change results in the change in quantity and quality of karst water through the effect on the recharge, runoff and drainage of karst water.