Design of a sustainable flood carrier system in Cuddalore of Tamilnadu

Abstract

Cuddalore district is located along the south west coast of Indian in the state of Tamilnadu bordering bay of Bengal.. The district is blessed with presence of wetlands, minor port and beach. The annual rainfall of the place is about 1300 mm. The district receives 70% of rainfall during north east monsoon from October to December. Agriculture is the main occupation. The rainfall along the coast is higher compared to upper regions. The high intensity rainfall occurrence is a common one. The district has anciently constructed hydraulic structures for conserving water called tanks. Perumal tank is the last source. The entire flood water during rainy season flows through a drain called Paravanar. This runs almost parallel to the coast for about 18km and finally merges with Bay of Bengal. Because of length and shallow slope, it takes more time for the water to recede. Hence a new canal was designed to drain some water directly in to the sea. HECRAS numerical model was adopted to study canal performance. The details of hydraulic studies and coastal sediment transport computations are highlighted.