Sediment Production is one of the major problems in the Watershed areas. Based on this sediment production rate the area selected to study the Prioritization of the watershed was Arasalar-palavar watershed around Nagapattinam District. Finally, the disaster reduction model was suggested by using “JOSE and DAS” formula. To study this problem the Spatial Information Technologies like Geographic Information System and Remote Sensing were used. For the successful completion of this work, several scholars have extended their assistance and help and following are few to mention. The resource considerations for implementation of watershed management programs or various other reasons pertaining to administrative or even political consideration may limit the implementation to a few sub watersheds. Prioritization of watersheds is the ranking of different sub watersheds of a watershed according to order in which they have to be taken for treatment and soil conservation measures. Once the watersheds were prioritized, quantitative assessment such as peak flow and volume of runoff serve as basic information for adopting suitable soil and water conservation measures in a watershed. Hence, it is necessary to evolve suitable method for prioritizing watersheds. Watersheds are arranged in the ascending order or their sediment production rate and ranking was given in ascending order.
