☆ 4.3 Article

Riverine Health Assessment Using Coordinated Development Degree Model Based on Natural and Social Functions in the Lhasa River, China

INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH (2022)

Journal

INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH

Volume 19, Issue 12, Pages -

Publisher

MDPI

DOI: 10.3390/ijerph19127182

Keywords

coordinated development degree model; riverine health assessment; index system; Lhasa River

Funding

National Natural Science Foundation of China [42101270, 91647204]
Specific Research Project of Guangxi for Research Bases and Talents [GuiKe-AD21220106]
Guilin Key RD Program [20210212-2]
Foundation of Guilin University of Technology [GUTQDJJ2020083]

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Abstract

This study used the Lhasa River as a case study to assess riverine health in Tibet, China by considering both natural and social functions of the river. Various indicators were used, and their weights were calculated using the entropy method. A coordinated development degree model was also developed to assess the coordination and development of natural and social functions. The results showed decreasing trends in natural functions, social functions, and riverine state index from upstream to downstream, but overall the river health was good. The construction of hydraulic projects had a significant impact on the social functions of the river.

Rivers provide a variety of ecosystem services to humans. However, human interference significantly impairs the rivers' functions and poses a threat to river health. To increase the understanding of riverine health in Tibet, China from 2011 to 2014, this study used the Lhasa River as a case study and established a multiple indicator system incorporating both natural and social functions of the river. Weights of riverine health indicators were calculated using the entropy method. Moreover, to evaluate the coordination and development of natural and social functions, a coordinated development degree model was developed. The results showed that the entropy weights of natural and social functions in the target layer were 0.67 and 0.33, respectively. Natural functions, social functions, and riverine state index all decreased from upstream to downstream, and marked as good during the entire study period. In 2012, the coordinated development degree improved from previously moderately coordinated to highly coordinated. Furthermore, the development of natural and social functions was synchronized throughout the study period. Further analysis revealed that the construction of hydraulic projects had a significant effect on the hydrological regime, resulting in an increase in social functions of the river. Therefore, the coordinated development degree model is shown to provide new insight into assessing riverine health in terms of both natural and social functions.

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Assessment of river health based on a novel multidimensional similarity cloud model in the Lhasa River, Qinghai-Tibet Plateau

Zhengxian Zhang, Yun Li, Xiaogang Wang, Hongze Li, Feidong Zheng, Yipeng Liao, Nanbo Tang, Guangyu Chen, Chang Yang

Summary: The study selected the Lhasa River as the research area, constructed a comprehensive indicator system, and assessed river health using wavelet noise reduction and multidimensional similarity cloud model. Results showed that the upper reaches had higher health levels, while the lower reaches were influenced by urban construction and water conservancy projects leading to decreased health levels.

JOURNAL OF HYDROLOGY (2021)