عنوان مقاله [English]
نویسندگان [English]چکیده [English]
The impact of land use change in the water quality changes is major challenges in water supply for different expenditure. This article evaluates the land use change effects on Zayandehrood river water quality. In this study, the change of land use in two periods in 1997 and 2015 was performed by TM and ETM Landsat satellite. Then, change of water quality in the 18-year period was studied. The results showed a major decline in water quality in the river's profile with increased phosphate, nitrate, EC, BOD, COD and TDS in the study period. Pearson correlation test showed a significant correlation between agricultural land with nitrates, phosphates and electrical conductivity and between the city and electrical conductivity. Mann-Kendall test showed that the trend of the most variables is ascending. Results showed a decline in water quality as a result of land use changes on river basin to reduce rangeland, forest, water and increasing the bare lands, agricultural lands and cities. Thus, there is need to proper implementation of programs to control land use change in order to maintain ecological balance.