The Role Evaluation of Land Use on Changes of Ground Water Quality in Lajan Watershed

Subject Areas : watershed

Rahman  Mahmood Hasan ¹ (Department of)
Mahmood  Habibnezhad Roshan ² (Department of Watershed Management Engineering, Faculty of Natural Resources, Sari University of Agricultural Sciences and Natural Resources, Sari, Iran.)
Leila  Gholami ³ (Department of Watershed management, Faculty of Natural Resources, Sari University of Agricultural Sciences and Natural Resources, Sari, Iran)

Received: 2017-04-19 Accepted : 2017-08-06 Published : 2017-08-23

Keywords: Water Quality, land use, Underground water, Lajan Watershed,

Abstract :

The land use cause the changes in water quality and therefore this study, the changes study of land use in years from 2002 to 2016 in Lajan watershed of the southern province of West Azerbaijan created using Landsat 5 and 8 and satellite images of TM and OIL and also GIS. The results showed that the rangeland and rain-fed land area decreased about 135.05 and 26.16 km2, respectively, but the area of irrigated agriculture, residential land and garden land increased with amount of 112.75, 28 and of 20.37 km2, respectively. Then, 22 pits for water resources quality of underground in years 2002 and 2016 selected for the study of land use change and parameters of chemical quality including residual salts, pH, electrical conductivity, bicarbonate, chloride, sulfate, magnesium, calcium, sodium, potassium, and sodium adsorption ratio total hardness. The concentration of main ions and concentration of soluble salts measured by standard methods. Finally, the effective parameters on studied samples quality and water resources quality of underground evaluated for different applications in two years. The results showed that the water resources of underground in Lajan watershed had bicarbonate type. The Wilcox diagram showed that the more samples in the favorable category were for agricultural section and Schuler diagram also stated that the water resources of underground were in range of good to excellent for drinking application. Also, the results showed that the water quality changes did not depended to land use changes.

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