Micro-Level Experimentation And Application Of Geospatial Methods For Rejuvenation Of Cooum Microwatershed

Abstract

Cooum river once a freshwater source gathering surpluses of 75 little tanks of the minor basin and was used as fishing and boat racing, now undergone the burden of the city's populace explosion.  Microlevel studies have identified the continuity of the river flow is disrupted by eight bridges obstructing the free flow of the channel. The sinuosity of the meandering channel varies from 1.432 in the upper reach to a 1.001 along with the lower range. The width depth ratio estimated by S. A SCHUMM’s equation varied from 0.0772 to 0.100. The ecological flow varied from 0.12 to 3.16 m³/s.  From the digital elevation model, it was found the relief of the Cooum watershed ranged from -1.5m to 29m. The primary source of the pollutant along the river course is comprised of solid wastes, effluent releases from factories and petroleum refineries, sewage etc... and seawater from estuaries. The amount of sludge to be removed is estimated for the micro watershed is 6172 sq.m, and the area extent is 111304 sq.m.