LINKING LAND USE CHANGES TO VARIATION IN SURFACE WATER QUALITY: EVIDENCE FROM 36 CATCHMENTS IN IRAN

M MAHMOODI
2019 Applied Ecology and Environmental Research  
In this article, the response of surface water quality to land use/land cover changes studied. We investigate the impact of land use changes on quality of water during three decades in the Razavi Khorasan Province of Iran. Detecting of LULC changes has done using Landsat satellite images belonging to the years 1987 (TM), 2001 (ETM + ) and 2015 (OLI). In the study area based on RS and GIS standard techniques, sixteen land use classes were defined: barren, rocky, residential, swamp, water, dunes,
more » ... wamp, water, dunes, salt marsh, irrigated cultivation, garden, dry farming, desert, good rangeland, medium rangeland, poor rangeland, wooded rangeland, and watercourse. Also, the water quality data from 1987 to 2015 in the stream gauge station located at the outlet of the 36 catchments analyzed. In this study, 13 parameters included K, Cl, Ca, Mg, Na, CO3, HCO3, SO4, EC, pH, TDS, SAR, and Hardness investigated. After removing variance, non-parametric tests performed and trends of water quality variables in the time series evaluated. Then, using a multivariate linear regression model was trying to link water quality variables to land use changes. Results demonstrated that the models estimate water quality parameters with an acceptable degree of accuracy (P-value < 0.05) except calcium, potassium, carbonate, and bicarbonate. The results showed the relationship between land use and the water quality indicators that can be applied in environmental protection and land use planning.
doi:10.15666/aeer/1704_81518169 fatcat:sl34hwq3f5ckvl3dwoqjmxexnu