In engineering practice, simple methods are important for predicting runoff from watersheds particularly for flood forecasting and water balance calculations. In the present study, it is illustrated that the often-used SCS runoff curve-number approach in its most elementary form can be derived from assuming that only saturated areas contribute to direct runoff.

Watershed is an ideal hydrological unit call for multidisciplinary approach of natural resource management, viable, for insuring continuous benefits on sustainable basis. Watershed approach has been the single most important too in this direction providing livelihood security in the rural areas and attracting people's participation in watershed programmes.

Dissipation of chlorpyriphos on cauliflower was studied following applications at recommended dose and double dose for the two consecutive years 2004 and 2005 to work out the safe preharvest waiting period.