Analysis of residual currents obtained from a 29.5-days simulation revealed the formation of eddies in the outer Gulf. The root mean square error for model predictions was found to be within 10%. The model-predicted amplitudes and phases of major tidal constituents at four locations compare well with the observed data. The model predictions show good agreement with the measured tide and current data. The model was calibrated with tide and current at predetermined locations. In this study, a two-dimensional hydrodynamic model (MIKE-21) was developed for Gulf of Kachchh with rectangular grid resolution of 450 by 450 m to understand the role of circulation pattern for mixing capacity of the Gulf. Management of coastal and marine areas by maintaining the balance between the developmental activities and protection of marine environment is a challenging task for coastal managers and requires a complete understanding of the physical, chemical, and biological aspects of the system. The Gulf of Kachchh (Gulf), India, an ecologically rich habitat, has a wide variety of activities, such as extensive salt farming along the coast, brine release from salt farms, maintenance dredging by ports and disposal of dredged material, release of hot water from thermal power plants, and navigation.
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