渭干河-库车河绿洲地表水水质空间分布特征

doi:10.16843/j.sswc.2019.05.011

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Abstract [Background]Water resources have become a global issue, especially in arid and semi-arid regions, where water resources are scarce and water quality is deteriorating.However, there are few studies on the spatial distribution of surface water quality in typical arid areas(Ugan-Kuche river oasis), thus the objective of this work is to study the spatial and temporal distribution characteristics of surface water quality in Ugan-Kuche river oasis.[Methods] The water quality indexes of the sampling points were taken as the research object, and the water quality variations in 2016-2017 were compared and analyzed by descriptive statistical methods, and the water chemical type was judged by combining the Piper diagram, the time trend of surface water chemistry characteristics were analyzed by GIS and statistical methods.[Results] 1)The river water quality indices such as pH, EC(Electrical Conductivity), TDS(Total Dissolved Solids), Cl^-, Ca²⁺, K⁺, and Mg²⁺ in 2016 were higher than in 2017, but SO₄^2-, HCO₃^-, Na⁺ concentration in 2017 were higher than in 2016. 2) The sampled water chemistry also showed the similar spatial variations, mainly expressed as Cl-SO₄-Na-Mg、Cl-SO₄-Ca-Mg and HCO₃-Cl-SO₄-Na-Ca-Mg.The dominant mechanism of natural control of surface water chemical sources was the evaporation concentration type. 3) The river water quality indices such as EC, Ca²⁺, Na⁺, Mg²⁺, Cl^-, and SO₄^2- showed a similar stripped distribution pattern. The value of each parameter showed an increasing trend in the upstream to downstream process.[Conclusions] From the spatial scale, the main reason for the surface water quality in the middle and lower reaches of Kuche River is that the natural factors such as the terrain of north high and south low of the study area and the human factors exacerbate the degree of salinization, which destroys the ecological environment. From the time scale, the water-salt stress is becoming more and more significant due to the lack of water and soil resources and the unreasonable use of human and soil resources in Ugan-Kuche river oasis.

Key words： variation of water quality geo-statistical analysis Piper diagram spatial distribution

Received: 28 June 2018

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	MUHADAISI Ariken
	MAMAT Sawut
	YIKELIMA Abudoumiti
	MA Chunyue

Cite this article:

MUHADAISI Ariken,MAMAT Sawut,YIKELIMA Abudoumiti, et al. Spatial distribution characteristics of surface water quality in the Ugan-Kuche river oasis[J]. SSWC, 2019, 17(5): 93-99.

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http://journal12.magtechjournal.com/Jweb_stbc/EN/10.16843/j.sswc.2019.05.011 OR http://journal12.magtechjournal.com/Jweb_stbc/EN/Y2019/V17/I5/93

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