Many lakes and ponds were dug around the Coimbatore city in ancient times to reserve the water from Noyyal river (Originates from western ghats). The city of Coimbatore has 28 Lakes ( Wetlands ) in the River Noyyal Basin fed by the river. They are also known as System Tanks in Public Works Department (PWD). Singanallur Lake, Kuruchi Lake, Valankulam Lake, Krishnampatti Lake, Muthannan Lake and Seevagasintamani Lake (Scroll down for map) are a few of them. In most of the urban ecosystems, these wetlands are the major life-supporting component with high concentrations of birds, mammals, reptiles, amphibians, fish and invertebrate species.

Noyyal River, a tributary of Kaveri River, noted for its capricious nature. This is fed mostly by the Southwest monsoon but the Northeast monsoon brings rains and this often results in floods. In-spite of its unpredictable character, the river contributes in the irrigation of considerable areas in Palladam Taluk of Coimbatore District and Dharapuram Taluk of Erode District. However now it is in its dark ages, just another dry river flowing behind Perur Town, clogged with all sorts of urban garbage.

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