WQI-BASED WATER QUALITY ASSESSMENT AND SPATIAL-TEMPORAL CHANGE IN PLAIN RIVER NETWORK AREAS

GENG Jiao; WANG Yang; HU Shugang; WEI Yanjie; SUN Fei; YUAN Peng

doi:10.13205/j.hjgc.202306025

Volume 41 Issue 6

Jun. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(6): 187-193,209

GENG Jiao, WANG Yang, HU Shugang, WEI Yanjie, SUN Fei, YUAN Peng. WQI-BASED WATER QUALITY ASSESSMENT AND SPATIAL-TEMPORAL CHANGE IN PLAIN RIVER NETWORK AREAS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(6): 187-193,209. doi: 10.13205/j.hjgc.202306025

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GENG Jiao, WANG Yang, HU Shugang, WEI Yanjie, SUN Fei, YUAN Peng. WQI-BASED WATER QUALITY ASSESSMENT AND SPATIAL-TEMPORAL CHANGE IN PLAIN RIVER NETWORK AREAS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(6): 187-193,209. doi: 10.13205/j.hjgc.202306025

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WQI-BASED WATER QUALITY ASSESSMENT AND SPATIAL-TEMPORAL CHANGE IN PLAIN RIVER NETWORK AREAS

doi: 10.13205/j.hjgc.202306025

1. College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China;
2. Watershed Research Center for Comprehensive Treatment of Water Environmental Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;
3. Jiashan Ecological and Environmental Monitoring Station of Jiaxing, Jiaxing 314100, China

Received Date: 2022-05-10
Available Online: 2023-09-02

Abstract

Abstract

Taking the typical small and medium-sized rivers of the plain river network area in Jiashan County of Zhejiang Province as the study area, the water quality index (WQI) method was used for water quality assessment, according to monthly monitoring data of fourteen sections from 2015 to 2020. On this basis, the spatio-temporal variation characteristics of the water quality were explored using the Mann-Kendall (M-K) trend test combined with geographic information system (GIS). The results indicated that the average WQI value was 65.09 in the five years, showing the evaluation level of "medium". The water quality of rivers had obvious spatio-temporal differences i. e., water quality was improved gradually from 2015 to 2020, superior in non-flood season to flood season within intra-annual variation and better in the northern area compared to southern. The main influencing factors of spatio-temporal differences in water quality were precipitation, human activity and land use types. These results would provide critical information for the management of water resources.
- plain river network,
- small and medium-sized rivers,
- water quality evaluation,
- comprehensive water quality index method,
- spatio-temporal variation

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References

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