Modeling Hydrodynamics

2011 2nd International Conference on Environmental Science and Development IPCBEE vol.4 (2011) © (2011) IACSIT Press, Singapore

Modelling Hydrodynamics for Water Quality of the Dwarka Region (Gujarat)

Rohit Goyal

Environmental Science and Engineering Department, Indian School of Mines Dhanbad, India. rohitgoyal1690@ismu.ac.in

Abstract-Hydrodynamic (HD) modelling is a prerequisite to environmental/ecological modelling; as it influences the biological and chemical processes .The flow determines the expected variations in water quality. Water quality can be impacted by the magnitude of flow, which dilutes loadings; the travel time, which affects the amount of material that can be produced or degraded; and the degree of mixing, which affects chemical gradients. Thus, the flow, the velocity, and the degree of mixing affect the assimilative capacity of streams and rivers. The present study aims at modelling the flow patterns prevailed off Dwarka during the period 05/12/2007 -05/01/2008. Measurements available for the above seasons have been used for the validation of model results. Based on the simulation results, circulation pattern off Dwarka is observed. Spatial and temporal variations of Dissolved Oxygen (DO) and Biochemical Oxygen Demand (BOD) in Rupen Bandar, Dwarka, India are assessed based on data collected since 1976. Keywords: Hydrodynamic (Eutrophication), Mike 21 Modelling, Water Quality

I. INTRODUCTION Coastal zone, the interface of land, ocean, and atmosphere, is clearly of major economic and social importance. It is defined as the region from the 200m water depths at the sea to the 200m elevations on the land. The vulnerability of the coastlines and coastal resources due to adverse impact from natural hazard events, pollution due to industrial discharges, etc. remind us to have a wise and sustainable management of coast and coastal resources. The coastal waters around Indian subcontinent are affected by the seasonally reversing winds which are...