**1.2 Effect on water quality**

Surface water temperature increase will increase properties such as solubilisation, dissolution, and evaporation in the surface water bodies. Increased temperatures will also favour degradation of chemical and organic compounds, complex formation and their reactions, and bring about transformations in the chemical property of water to a much higher degree. As Arrhenius equation explains, kinetics of a given chemical reaction can be doubled for a temperature increase of 10°C, Increased temperature of water bodies due to high atmospheric temperature may alleviate dissolution of substances and decrease the dissolved gases in water. Depletion of the most important dissolved gases, oxygen, also affects the quality of water [6]. The increase in temperature and accommodating extreme inflow has a definitive effect on the quality of water due to mixing of pollutants, sediments, pathogens, pesticides, salt, organic carbon, nutrients etc. The surface water bodies are at the receiving end of the heavy contaminants through run-off which changes the quality of water. Extra heat released by anthropogenic causes, industrial processes, directed to water bodies, cause change in water quality called thermal pollution. Hence the quality of surface water is compromised due to increased heat as well as its calamitous effect on the physical and chemical properties of water and added contaminants. This negative impact is more pronounced to the aquatic ecosystem and the health of human population [7].
