The Gujarat 2001 earthquake drove home the point that cities built on river alluvium and sand are likely to suffer maximum damage from an earthquake due to high water table and the construction of dams in the upper reaches

Accumulation of sulfur-containing compounds and their bacterial mediated reductions have led to the emission of pungent odors from stagnant water bodies. This study is focused on the contribution of inorganic sulfur compounds in the emission of hydrogen sulfide. The measured dissolved oxygen levels have demonstrated good negative correlations with the dissolved sulfide levels implying the oxygen deficiency is the key for the reduction of sulfate ion and sulfite ion to sulfide ion.