*Article* **Analysis of Seasonal Variations in Surface Water Quality over Wet and Dry Regions**

**Muhammad Mazhar Iqbal 1,2 , Lingling Li 3,4,\*, Saddam Hussain 5,6,7 , Jung Lyul Lee 1,8, Faisal Mumtaz 9,10 , Ahmed Elbeltagi <sup>11</sup> , Muhammad Sohail Waqas <sup>12</sup> and Adil Dilawar 10,13**


**Abstract:** Water quality is highly affected by riverside vegetation in different regions. To comprehend this research, the study area was parted into wet and dry regions. The WASP8 was applied for the simulations of water quality profile over both Waterways selected from each region. It was found that the Ara Waterway, located in the wet regions, has a higher water quality variation in seasonal scale than that of the Yamuna Waterway, which is in the dry region. The interrelationship between river water quality variables and *NDVI* produce higher association for water quality variables with Pearson correlation coefficient values of about 0.66, 0.68 and −0.58, respectively, over the annual and seasonal scales in the energy limited regions. This approach will help in monitoring the seasonal variation and effect of the vegetation biomass on water quality for the sustainable water environment.

**Keywords:** WASP8; Ara Waterway; Yamuna River; *NDVI*; anthropogenic activities
