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《Progress in Geography》 2008-01
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Progress on Theories and Methods of Watershed Eco—health Assessment

LI Chunhui1,2, CUI Wei1, PANG Aiping2, ZHENG Xiaokang1,2 (1. Key Lab of Water and Sand Science, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, China; 2. State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China )  
Watershed ecosystem is a social-economic-natural complex ecosystem. Watershed eco-health assessment can help watershed layout, protection and comprehensive management, and can provide basis for decision-making. In this paper, the concept and characteristics of watershed eco-health are introduced, and the history, current condition and research scale of watershed eco-health assessment are put forward. The assessment should be carried out from broad temporal-spatial scales. This research summarizes methods of watershed eco-health assessment in the past years both at home and abroad. There are two main methods: one is biological assessment and the other is indices assessment. It should be careful in selecting bio-indicator species because the sensitivity and reliability of species need to be considered simultaneously. The indices should include six categories: bio-assessment, water condition assessment, hydrological assessment, habitat assessment, social-economic assessment and human health assessment. Every category has some relative indices. Because of the complexity of watershed ecosystem, the measures of watershed eco-health indices are difficult sometimes. The measurement methods should be further developed. Ecosystem restoration is needed for those unhealthy watershed ecosystems and methods of it are introduced. Watershed eco-health assessment is a developing theory system and there are some problems that should be further discussed in this field. Last, these problems and research trends in future are pointed out.
【Fund】: 国家自然科学基金[50709002和50509002];; 国家重点基础研究发展规划项目(2006CB4033)
【CateGory Index】: X826
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