干旱区研究

Arid Zone Research >

2021 , Vol. 38 >Issue 3: 640 - 649

DOI: https://doi.org/10.13866/j.azr.2021.03.06

Water Resources and Ulilization

Water quality evaluation and spatial difference of Yuehai wetland in Ningxia

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  • 1. State Key Laboratory Breeding Base of Land Deogradation and Ecosystem Restoration, Ningxia University, Yinchuan 750021, Ningxia, China
    2. Key Laboratstory of Northwest Degra Ecosystem Restoration and Reconstruction, Ministroy of Education, Ningxia University, Yinchuan 750021, Ningxia, China

Received date: 2020-09-07

  Revised date: 2021-01-18

  Online published: 2021-06-17

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Abstract

This study aimed to determine the influence of water depth, reed distribution, water intake, and drainage outlet distribution on the water quality of Yuehai wetland in Ningxia. Data from 14 water points were collected and analyzed in the spring (may), summer (August) and autumn (November) of 2019 following the environmental quality standard for surface water (GB3838-2002), and the water quality of Yuehai wetland was evaluated using the fuzzy comprehensive evaluation method. Additionally, differences in the spatial distribution of the samples were evaluated. Most of the seasonal water quality indices of Yuehai Lake were between class III and class IV. Among them, the water quality was worst in May, relatively good in November, and moderate in August. Additionally, the spatial distribution of the water quality indices of Yuehai lake changed in different seasons. In May, the Yuehai water body exhibited class II water quality in shallow areas, class IV water quality in the reed area, water inlet, and deep water area. In August, there was class IV water quality in the deep water area and reed area, class I water quality in the water inlet, and class III water quality in other areas, and in November, there was class IV water quality in the water inlet and class III water quality in other areas. Lastly, the temporal and spatial variation of water quality indices in Yuehai lake were related to the external input of artificial water supplement, tourism activities, bird habitat and breeding, and the disturbance of natural and human factors on the lake sediment. These results can be used as a reference for the management of water resources and the ecological environment in arid areas, such as Yuehai wetland.

Key words： Yuehai wetland; water quality; fuzzy comprehensive evaluation; spatial difference; Ningxia

Cite this article

YANG Lei,QU Xiangning,MA Zhenghu,ZHNAG Yuxun,TIAN Yuan,HE Zhirun . Water quality evaluation and spatial difference of Yuehai wetland in Ningxia[J]. Arid Zone Research, 2021 , 38(3) : 640 -649 . DOI: 10.13866/j.azr.2021.03.06

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