http://nopr.niscpr.res.in/handle/123456789/35607 2026-10-08T09:14:34Z 2026-10-08T09:14:34Z Sreekala, S P Baba, M Muralikrishna, M http://nopr.niscpr.res.in/handle/123456789/35749 2016-10-18T11:26:23Z 1998-03-01T00:00:00Z

Title: Shoreline changes of Kerala coast using IRS data and aerial photographs Authors: Sreekala, S P; Baba, M; Muralikrishna, M Abstract: Long-term erosional/accretional trend along Kerala coast is studied using satellite imageries and aerial photographs for the-year 1990 and the survey of India topographic maps of 1967. Based on this study the sectors undergoing erosion/accretion are identified. It is found that 148 km of the Kerala coast (including some areas protected by sea walls) is eroding and 304 km coast is accreting. Thirty kilometer of the coast comes under high erosion category. Twenty one kilometer of coast recorded high rate of accretion. Page(s): 144-148

1998-03-01T00:00:00Z Rao, A D Dube, S K http://nopr.niscpr.res.in/handle/123456789/35748 2016-10-18T11:21:38Z 1998-03-01T00:00:00Z

Title: A three-dimensional simulation of coastal upwelling/downwelling off east coast of India Authors: Rao, A D; Dube, S K Abstract: Numerical experiments have been performed using the baroclinic 3-dimensional coastal ocean model. The model is used to simulate the coastal circulation off east coast of India. The driving mechanism consists, in general, of wind stress forcing representative of that applying during the premonsoon, monsoon and postmonsoon seasons. The simulations are in good agreement with observation on upwelling/downwelling off Visakhapatnam during different seasons. Page(s): 138-143

1998-03-01T00:00:00Z Sinha, P.C. Rao, Y.R. Dube, S.K. Murthy, C.R. http://nopr.niscpr.res.in/handle/123456789/35747 2016-10-18T11:17:44Z 1998-03-01T00:00:00Z

Title: A numerical model for residual circulation and pollutant transport in a tidal estuary (Hooghly) of NE coast of India Authors: Sinha, P.C.; Rao, Y.R.; Dube, S.K.; Murthy, C.R. Abstract: To study pollutant dispersal in the estuary a non-linear vertically integrated numerical model has been applied to the Hooghly estuary along the east coast of India. The horizontal density gradient terms are included in a two-dimensional depth-averaged hydrodynamic model. Biochemical oxygen demand (BOD) was adopted as a tracer for water quality. The model uses a realistic tidal forcing, fresh water flow based on observations and climatic winds over the region of interest. The effects of wind and horizontal density gradients on the residual circulation are found to be significant. Pollutants discharged in the upper estuary do not affect the Haldia channel. The model predictions compare reasonably well with observed elevations and currents in the estuary. For verification of pollutant transport model, observational data is presently unavailable, however, the salinity distribution compares well with the observations. Page(s): 129-137

1998-03-01T00:00:00Z Rao, Y R Sinha, P C Dube, S K http://nopr.niscpr.res.in/handle/123456789/35746 2016-10-18T11:11:40Z 1998-03-01T00:00:00Z

Title: Circulation and salinity in Hooghly estuary: A numerical study Authors: Rao, Y R; Sinha, P C; Dube, S K Abstract: Numerical models are presented for tidal flow and salinity in the Hooghly estuary, along the east coast of India. A depth-averaged numerical model coupled with a one-dimensional model is discussed. The model has been validated with the available observations for the dry and wet seasons. The influence of storm surges on the circulation is also discussed in this section. A multi-level laterally averaged model for the estuary is also described. The vertical structure of the currents and salinity are validated with spring observations during both wet and dry seasons. Page(s): 121-128

1998-03-01T00:00:00Z