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- W2321859516 abstract "River habitat is an important component of river ecosystem and also the foundation of existence and development riverine organisms. Recently,the survey and assessment of river habitat plays an increasingly important role in watershed ecological planning,river environmental impact assessment and river ecological restoration.River Habitat Survey is a methodology for recording habitat features for river habitat,designed by the Environment Agency,England and Wales since 1992. Nowadays,River Habitat Survey is being used as a standard methodology for assessing hydromorphology which is a part of the European Water Framework Directive and also as a tool for monitoring river habitats and assessing potential impacts of developments. As a famous stream physical habitat assessment method,River Habitat Survey was wildly applied in many other countries beside Europe countries.In order to introduce River Habitat Survey to Chinese scientist and promote river habitat assessment work in China,Dong River located in the Three Gorges Area of China was investigated using River Habitat Survey method to evaluate its habitat quality and identify dominant human disturbances. Both Habitat Quality Assessment and Habitat Modification Score were employed to assess its status and spatial pattern of human disturbance.In April,2011,fifty one river reaches of the Dong River were investigated. The result indicated that the Habitat Quality Assessment score ranged from 24 to 66. The reaches withexcellentHabitat Quality Assessment score was 29. 4%,29.4% good,23.5% fair,9.8% poorand 7.8% extremely poor. According to Habitat Modification Score,7.8%of reaches is semi-natural status,19.6% of predominantly unmodified status,41.2% of obviously modified status,27.5% of significantly modified status and 3. 9% of severely modified status. Habitat Quality Assessment score was significantly negative correlated with Habitat Modification Score. Habitat Quality Assessment score of upstream, midstream and downstream of the Dong River was not significantly different,while four assessment categories,including channel features,in-stream channel vegetation,land-use within 50 m and trees and associated features,were significantly different. Habitat Modification Score of downstream reaches were significantly different between those of upstream and midstream reaches. The river habitat of upstream and midstream reaches of the Dong River was mainly influenced by small hydropowers,highways along river and sand excavation in river channel,while the river habitat of downstream river reaches was significantly affected by intensive land exploration,sand excavation in river channel,construction of riverbank,drain pipe,bridge and water level fluctuation of the Three Gorges Reservoir. Our research suggested that River Habitat Survey can efficiently detect the status of river habitats and find the dominant reasons for its deterioration." @default.
- W2321859516 created "2016-06-24" @default.
- W2321859516 creator A5046225712 @default.
- W2321859516 date "2014-01-01" @default.
- W2321859516 modified "2023-09-28" @default.
- W2321859516 title "Stream habitat assessment of Dong River,China,using River Habitat Survey method" @default.
- W2321859516 hasPublicationYear "2014" @default.
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