Noyil River, a tributary of Kaveri
is noted for its capricious nature. This is fed mostly by the Southwest
monsoon but the Northeast monsoon brings rains and this very often results
in floods. Inspite of its unpredictable character, the river helps to
irrigate considerable areas in Palladam Taluk (also spelt as Taluka) of
Coimbatore District and Dharapuram
Taluk of Erode.