Environ - Technology Towards Nature

Environmental Impact Assessment (EIA) studies

Environmental Impact Assessment (EIA) studies

An Environmental Impact Assessment (EIA) is an assessment of the possible positive and negative impact that a proposed project may have impact on environmental, social and economic aspects. EIA is the process of identifying, predicting, evaluating and navigating the biophysical, social and other relevant effects of development proposals prior to major decisions being taken and commitments made.

Environ, in association with competent organizations has carried out such studies in the field of ports/harbors, desalination plants, thermal power plants etc.

  • Hydrodynamics studies
  • Sediment transport studies
  • Wave transformation studies
  • Wave disturbance studies
  • Dredging and dispersion studies
  • Oil spill studies
  • Intake and outfall dispersion studies
  • Air and ground water studies
  • Ship Navigational simulation studies
  • Dredge disposal studies
  • Dispersion of Pollutants in open waters
Hydrodynamics studies

These studies are used to predict tidal flow currents and elevations, river flows and storm surges. This information is used as one of the inputs in the design of port structures. The currents and water elevations obtained from these studies are essential inputs for assessment of sedimentation, dispersion of pollutants, oil slick transport, dredging & disposal studies etc.

Sedimentation transport

These studies are used to predict the changes in bed morphology, erosion & deposition zones, predict backfilling of dredged channels, morphological changes in sea, river & estuarine environments.

Wave transformation

This involves the transformation of waves from offshore to the near-shore areas. The near shore wave data is a necessary input for design of coastal structures and estimation of downtime for transshipment operations.

Wave disturbance studies

This is useful in estimating the disturbance due to short waves in the port basin. It helps in understanding the total operational days of the port.

Dredging and disposal studies

Dredging studies are used to estimate the extent of spreading of the bed material which is brought into suspension during dredging operations. Dredged material disposal studies are used to estimate the changes in seabed level and ambient sediment concentrations during dumping operations. These are used to identify suitable location for dredge disposal.

Oil spill studies

Studies are used to simulate the oil slick mobility, amount of oil left on the water surface, evaporation and evolution of the oil properties in ambient environmental conditions. Mitigation measures and response in an emergency can be planned. The studies are used to prepare Oil Spill Contingency and Response Plan and NEBA studies as per NOSDCP-2015 guidelines

Intake and outfall dispersion studies (near field and far field)

Studies are used to identify suitable location for outfall discharges where sufficient flushing capacity of effluent water exist for various hydrological and oceanographical conditions. Near field model is applied to predict the maximum effluent concentration at discharge location and far field model is used to predict the effluent spreads at which it attains ambient conditions.

Storm surge studies

The studies are used to predict the storm surges and risk assessment. It estimates storm surge heights resulting from historical, hypothetical or predicted hurricanes. These studies forms the basis for the ‘hazard analysis’ portion of the coastal hurricane evacuation plans.

Air and ground water studies

Studies are used for predicting the formation and impact of gas clouds or particle matter. A dispersion can be continuous in nature, such as emission from the stacks and cooling towers in the industrial area and vehicular exhausts on roads, or accidents in nature, such as industrial accidents and heavy gas spill from trucks, railway cars or boats

Studies are used to simulate ground-water flow and associated heat and solute transport in three dimensions. It can be used for analysis of problems such as those related to sub-surface waste injection, landfill leaching, saltwater intrusion, freshwater recharge and recovery, radioactive-waste disposal, hot-water geothermal systems, and subsurface-energy storage.

Ship Navigational simulation studies

The studies are used to predict the optimized navigation route for various sizes of Vessels while approaching Jetty / berth from the offshore. Also used to predicts the time taken for any powered or non-powered engine ship to reach the desired location subjected to the various natural causes such as tides, winds, storms and cyclones. The studies also include the calculation of steering force and acceleration required for any vessel while maneuvering to reach the destination.

Dredge disposal studies

Studies are used to predict transport of suspended particles of different size/ material and bed load transport within the water bodies with a free surface. Calculate the deposit on the bottom and the entrainment of suspension by the process of erosion. Identifying suitable location for dredge disposal, where there will not be forming any heap

Dispersion of Pollutants in open waters

Studies are used to Predict the maximum spread of discharge effluent water under varied oceanographic and metrological conditions. Predicting the distance at which the effluent is reaching the ambient condition. Locating suitable intake and outfall locations which are free from recirculation