Abstract
Abstract Ecological revetments make an important role in river restauration. However, evaluating the ecological efficiency of revetments as a major determinant of revetments selecting is lack of quantitative methods. Here, we developed an Index of Ecological Integrity (IEI) to assess the ecological efficiency of seven model restauration revetments quantitatively based on four times regular ecological investigation in a representative river plain. Thirteen metrics of the IEI were identified from the candidate pool made up of 46 indicators. These indicators corresponded to the metrics of 5 existing synthetic indexes respectively, Index of Biotic Integrity (IBI) of fish, IBI of benthic macro-invertebrate, IBI of zooplankton, Habitat Index, and Water Quality Index. Signal-noise ratio and one-way analysis of variance indicated that the IEI was more effective to distinguish the differences of ecological efficiency among revetments. Furthermore, IEI suggested that 7 types of restauration revetment could improve the ecological quality of plain rivers to different degree. Rock, eco-bag, and eco-concrete tetrad-ball as ecological revetments were more suitable for river plains like Hang-jia-hu Plain (Zhejiang Province, China) because of highly positive ecological efficiency in two years after restoration engineering completing.
Published Version
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