A STUDY ON HYDRODYNAMIC AND MORPHOLOGICAL BEHAVIOR OF SARADA RIVER USING DELFT3D MODEL

the River Sarada is a medium-sized river. The river’s physical location is between 17 and 18 degrees north latitude and 82 to 83 degrees east longitude. The basin’s catchment area is 2,665 square kilometres. It rises in the Eastern Ghats at a height of 1,000 metres. It travels 122 km in an easterly direction before joining the Bay of Bengal. River Nagavali, River Gosthani, River Gambiramgedda, River Megadrigedda, Bay of Bengal, and the Machhkund sub-basin of the River Godavari all encircle the basin. The largest city in the basin is Visakhapatnam. Important towns in the basin include Yelamanchili and Anakapalli. Due to its extreme susceptibility to erosion and deposition, the Sarada river, which has historically been thought of as a river that primarily meanders, is transitioning into a braided river. By creating a 2D model with Delft3D, a hydrodynamic and morphological analysis of the Sarada River is carried out to determine its suitable behavior. With the use of numerical modeling, we will build a semi-circular breakwater at the river’s mouth where it entered the Bay of Bengal in this study. Different morphological and hydrodynamic properties, including sediment transport rate and cumulative erosion/deposition, are evaluated. Tidal effects can cause changes in water level, velocity changes, and discharge. The findings show that the tidal range is greatest during the dry season and increases from upstream to downstream of the river. The model confirms the phenomenon and demonstrates that during the rainy season high velocity leads in high sediment transport rate, which ultimately contributes to erosion/deposition of river bed. It is believed that this study’s conclusions would assist people grasp the general hydrodynamic and the river’s morphological characteristics and potential future development projects are suggested.