Author(s): Yifan Ding; Dacheng Chen; Xin Zhang; Yulin Chen; Ning Yang; Yaqi Dai

Linked Author(s):

Keywords: Chongming Island; Biological Survey; Ecological Security; Remote Sensing Interpretation; River Health Index; Social Service Function

Abstract: Chongming Island is the world's largest estuarine alluvial island and the third-largest island in China. An indicator system for evaluating the health of the rivers in Chongming Island was established and applied. The methodology includes the selection of indicators, the determination of index weight and grading standard, and the River Health Index (RHI) scoring. The data were collected by various means, including literature survey, remote sensing interpretation, biological survey and satisfaction questionnaire. The results indicate that the RHI of the selected rivers range from 55.05 to 73.15, with the health status grades of "sub-healthy" and "healthy”. At the criterion level, the average scores of water resources and water quality indicators were the highest, while biological indicators were the lowest, indicating that the water environment quality of Chongming Island is relatively good, but the integrity of the intrinsic biological system is still far from the ideal state, and biological indicators are the most important factors affecting the health of rivers in Chongming Island. The findings are of relevance to other areas of the plain river network.

DOI: https://doi.org/10.3850/iahr-hic2483430201-443

Year: 2024