Assessment of river ecosystem health in Tianjin City, China: index of ecological integrity and water comprehensive pollution approach

doi:10.1007/s11707-020-0857-6

Front. Earth Sci.

2021, Vol. 15

Issue (4) : 936-946 https://doi.org/10.1007/s11707-020-0857-6

RESEARCH ARTICLE

Assessment of river ecosystem health in Tianjin City, China: index of ecological integrity and water comprehensive pollution approach

Yan WANG¹, Shang ZHAO², Mingdong SUN¹, Xubo LV¹, Wenqian CAI¹, Xiangqin XU¹(

), Hongxiang GE³(

), Kun LEI¹

¹. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
². Beijing Jiaotong University, Beijing 100044, China
³. Zhujiang College, South China Agricultural University, Guangzhou 510642, China

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Abstract

Evaluation of the river ecological environment can provide a basis for river management and ecological restoration. To conduct a comprehensive health assessment of the rivers in Tianjin, their biological, physical, and chemical indicators are investigated on the basis of 32 river monitoring sites from August to September 2018. The comprehensive pollution and ecological integrity indexes of the rivers are analyzed. Results of the two evaluations, compared to achieve the river ecological environment evaluation, are as follows. 1) Index of Ecological Integrity evaluation shows that among the sampling points, 18.8% are “healthy”, 28.1% are “sub-healthy”, 40.6% are “fair”, 6.3% are “poor”, and 6.3% are “very poor”. 2) The comprehensive evaluation of the chemical properties of the 32 river ecosystems in Tianjin shows severe overall river pollution and low standard water function area. Of the total sampling sites, 16 (50%) are heavily contaminated and 10 (31.3%) are moderately contaminated. Excessive chemical oxygen demand and ammonia nitrogen are the main causes of water pollution. 3) The Index of Ecological Integrity (IEI) has high correspondence with environmental factors. Pearson correlation analysis results show that the IEI index is significantly correlated with permanganate index (R= - 0.453; P = 0.023<0.05). Analysis results using BEST show that ammonia nitrogen is the best environmental parameter to explain the changes in IEI (R_ho= 0.154; P = 0.02<0.05) and those using RELATE show significant correlation between the biotic index and the environmental parameter matrices (R_ho= 0.154; P = 0.034<0.05).

Keywords water ecological function zone index of water comprehensive pollution index of ecological integrity Tianjin

Corresponding Author(s): Xiangqin XU,Hongxiang GE

Just Accepted Date: 04 June 2021 Online First Date: 28 September 2021 Issue Date: 20 January 2022

Cite this article:

Yan WANG,Shang ZHAO,Mingdong SUN, et al. Assessment of river ecosystem health in Tianjin City, China: index of ecological integrity and water comprehensive pollution approach[J]. Front. Earth Sci., 2021, 15(4): 936-946.

URL:

https://academic.hep.com.cn/fesci/EN/10.1007/s11707-020-0857-6
https://academic.hep.com.cn/fesci/EN/Y2021/V15/I4/936

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