ACTIVITIES

A number of coastal establishments like ports and harbours and activities like waste disposal prevalent in the land and adjoining coastal areas have adverse impact on the ambient coastal and marine areas. The data collected under the Coastal Ocean Monitoring and Prediction System (COMAPS) programme of Dept. of Ocean Development (DOD) and information from other sources indicate degradation of coastal and marine environment at some places and trend towards such degradation at considerable number of locations. These locations include certain critical habitats like Mangroves, Coral reefs, seagrass beds, areas of biodiversity, etc. In order to prevent further degradation of coastal and marine environment and habitats, the Government has proposed to introduce the adoption of the concept of Integrated Coastal and Marine Area Management (ICMAM) in India. The Dept. of Ocean Development with its mandate to preserve the marine environment, is engaged in the capacity building activities in ICMAM related areas. These activities in brief are given below. The coastal States which have to adopt the concept of ICMAM are adequately trained by DOD through its expertise acquired by implementing the capacity building activities and dedicated training facilities developed by DOD for this purpose.

The major activities under the Coastal and Marine Area Management component are the development of expertise in specialised areas relating to adoption of the concept of Integrated Coastal Zone Management. The areas identified for the capacity building include application of scientific tools and techniques like GIS, remote sensing and mathematical modelling to analyse the problems prevalent along the coastal marine areas and develop integrated management solutions.

Capacity Building Projects Completed:

  1. Development of GIS based information system for selected critical habitats in the coastal and marine areas in India:
  2. The main aim of this activity is to develop an information system using Geographical Information System (GIS) for 11 critical habitats namely, Gulf of Kachchh, Gulf of Khambhat, Malvan, Karwar Islands, Cochin Islands, Kadmat island of Lakshadweep, Gulf of Mannar, Pichavaram, Coringa, Gahirmatha and Sunderbans.

    Landuse / Land cover pattern in Coringa (Andhra Pradesh) between 1988 & 1998

    Critical Habitat Information System in respect of all the above 11 critical habitats has been completed and brought out in the form of a report and ArcView and Powerpoint presentations. A standalone package of query for the database has also been developed in Windows environment.

    GIS and Remote Sensing were as tools for assessing the status of the critical habitats, such as mangroves, coral reefs, sea grass beds, wetlands and other coastal eco-systems. The changes in the characteristics of mangrove ecosystem, especially the mangrove vegetation coverage and the land cover changes as brought out by the Remote Sensing techniques and the overlay and change analysis facilities available in the GIS software, have clearly indicated the quantitative changes from healthy mangrove to degraded and vice-versa. It has also revealed the extent of conversion of mangrove areas to others like shrimp culture farms and mudflats to mangroves. Such an information is very useful to analyse the causes for degradation and to take conservative measures. GIS has greatly helped in accurate mapping of coral reef in Gulf of Mannar, Malvan and Kadmat island and to indicate the locations of patches of live and dead corals. This information is very useful for periodical monitoring of coral reef cover, assess their health and develop conservation measures. The mapping of turtle breeding grounds in and around Gahirmatha has revealed the possibility of coastal geomorphology playing a significant role for turtle to decide the area of nesting.

    Based on the extensive studies carried out by the ICMAM Project Directorate on Development of GIS based information system for these critical habitats, a number of suggestions/recommendations have been made to the coastal states for conservation and management of these critical habitats, based on sustainability principles. For containing the degradation of mangroves in Pichavaram (Tamil Nadu) and Coringa (Andhra Pradesh), afforestation programmes have been recommended and initiated. Besides, measures have been introduced for enhancing the flushing of tidal waters in the interior areas of the mangroves, which is essential for the growth of mangroves as well as dispersal of mangrove seedlings, larvae of finfish and shellfish and transport of nutrients from mangrove to coastal waters. The Govt. of Tamil Nadu has used the GIS based coral reef maps of Gulf of Mannar for demarcation of marine protected areas or areas closed for fishing.

  3. Determination of Waste Load Allocation and Waste assimilation capacity at selected estuaries along coastal areas of India:
  4. The concept of Waste Load Allocation based on the Waste Assimilation Capacity of our estuaries and coastal water are new to India. Three sites were selected to demonstrate this concept and they are, Tapi estuary (Gujarat), Ennore Creek (Chennai) and Hoogly estuary (West Bengal). The assimilation capacity of selected pollutants like organic load (BOD) and bactria were determined using water quality models. The results obtained indicated, excessive BOD load in Tapi estuary and Ennore creek and high bacteiral levels along the Royapuram (Chennai) coast and in the bathing ghats of the Hoogly estuary. The Pollution Control Boards of respective States were closely associated with the above exercises. The project was implemented by National Institute of Ocean Technology (NIOT).

  5. Development of Guidelines for Environmental Impact Assessment (EIA) studies for marine and coastal developmental activities and processes:

EIA Guidelines have been developed through NIOT for conducting Environmental Impact Assessment studies in the Ports and Harbours, tourism related activities in the coastal marine areas and for waste disposal from domestic and industrial sources including discharge of waste through pipelines, etc

The guidelines prepared for ports and harbours address the following issues:

  1. National and International Environmental regulations relevant to port and harbour projects,
  2. Screening and scoping to determine the type of EIA,
  3. Baseline studies,
  4. Prediction of Environmental impacts,
  5. Risk assessment factors,
  6. Environmental Management Plan (EMP) to mitigate and offset the adverse environmental impacts of the project and to protect the environment and Environmental Impact Statement (EIS) giving details of the studies carried out for EIA.

The EIA guidelines for wastewater disposal through marine outfalls address the following issues:

  1. Environmental legislations applicable to locate an outfall facility in the coastal zone, discharge standards of treated waste water and coastal water quality criteria for different uses;
  2. Baseline assessment;
  3. Analysis of alternatives
  4. a. Alternative selection of pipeline route.

    b. Alternative technology i.e. alternative waste water treatment and disposal option.

  5. Environmental impacts of marine outfall;
  6. Optimisation of the location of the outfall and design; and
  7. Monitoring the performance of a marine outfall.

Tourism

The guidelines on the EIA for coastal tourism developed by NIOT highlight the nature of projects, data required for the feasibility study, techno-economic feasibility analysis, environmental clearances required for setting up of the projects, comparison of the tourism projects with alternative projects, evaluation of impacts, baseline assessment of air, land and water environments, prediction of impacts and environmental management. These guidelines would be useful in pre-project evaluation of the impacts of tourism and for ensuring sustainable use of the coastal resources.

4. Development of model Integrated Coastal and Marine Area Management (ICMAM) plans for selected sites along the coastline of India:

The concept of integrated and marine area management is being practised in various countries to minimise cross-sectoral impacts. In the recent years, there has been considerable concern about the effectiveness of the legal and administrative frame works to regulate / manage the activities in coastal and marine areas. Reconciling a number of conflicting and often incompatible demands of various sectors is a challenging task for coastal managers. The concept is being applied first time in India and demonstrated in the form of model ICMAM Plans for three sites viz, Chennai, Goa and Gulf of Kachchh as a capacity building exercise. The project primarily use tools and techniques like GIS, Remote Sensing, Mathematical Modelling and Decision Support System (DSS) in the preparation of model ICMAM Plans in these areas which are having a variety of issues.

A model ICMAM Plan for Chennai has been prepared by ICMAM-PD with the help of Tamil Nadu State Govt. and Indian Institute of Technology, (Madras) Chennai. Modern tools like GIS, Remote sensing, Numerical Modelling (MIKE-21) and Decision Support System (DSS) were used to analyse issues in the 40 km stretch of Chennai coast extending from Pulicat Lake in the north to Mahabalipuram in the south and for prediction of impacts due to natural and anthropogenic perturbations. Economy, Environment and Society were taken as criteria to analyse various issues along the Chennai coastal zone and the Decision Support System (DSS) was developed. DSS integrates various sectors and habitats along the coastal zone and it enables user/decision maker for taking better decision. Erosion-Accretion, Pollution and conflicting land uses due to tourism development were identified as major issues for Chennai. Shoreline Changes and configuration of submerged shoals between Pulicat and Ennore Creek were monitored to study the impact of Ennore port. Pollution due to land-based activities in waterways and coastal areas was monitored and lack of treatment and frequent closure of tidal inlets was identified as major causes. Measures to prevent erosion, siltation at inlets and pollution along north Chennai coast were worked out as part of the plan and cross-impacts of these measures were tested through mathematical modelling and DSS and solutions that have least cross-impacts have been suggested for adoption.

 

Monitoring of Ennore Shoals using GIS.

 The Project Directorate will develop such model plans for Goa and Gulf of Kachchh. The task of collecting the primary and secondary data required for preparation of the plan for both the sites is entrusted to NIO, Goa. These plans are expected to be completed by December 2003.

The following are identified as key issues for ICMAM Plan for Goa:

  1. Sustainable development of tourism sector.
  2. Mining activities and management of waste.
  3. Decrease of fishery resources
  4. Landuse changes.

The issues identified for Gulf of Kachchh are:

  1. Proposed large-scale developmental activities that are likely to cause serious problems to ecosystem.
  2. Movement of oil tankers and accidental oil spill that may pose threat to marine ecosystem, composed of mangrove and corals and resources like salt.
  3. Increasing salinity in the eastern part of Gulf of Kachchh.

R&D Projects:

1. Determination of Best Designated Use Classification of Coastal Waters

The conflicting use of coastal waters will lead to loss of resources, revenue to the dependent fishermen population and long term damage to the environment. In view of this, the zonation of coastal waters using prescribed standards for use classification is being undertaken to classify coastal waters into 5 zones based on a preliminary classification made by the Central Pollution Control Board (CPCB). The main aim of this study is to develop future designated use of coastal waters based on the present use, with the help of a GIS based information system for 28 locations. These aspects have been completed for Porbandar, Veraval, Ratnagiri, Daman, Hazira (Tapi estuary), Honnavar, Mangalore, Trivandrum, Calicut, Tuticorin, Nagapattinam, Pondicherry, Krishnapatnam, Visakhapatnam, Gopalpur, Konark, Puri and Digha. The project has been implemented with the help of Institute of Ocean Management, Anna University, Chennai, National Institute of Oceanography, Goa and its regional centres at Kochi and Vishakapatnam. During the years 2003 - 2006, Use Classification will be determined for 10 more locations.

Use Classification of Tuticorin Coastal Waters

The major tasks involved in this exercise are as follows:

    • Documentation of water and sediment quality data collected under the COMAPS Programme along the coastal areas, location of industries and human settlements;
    • Documentation of details on the coastal habitats, land use/land cover pattern, coastal infrastructure, socio- economic activities and developmental activities;
    • Identification of existing coastal water uses of developed, undeveloped and under-developed areas, if any;
    • Preparation of designated best use classification for coastal waters.

2. Coastal Habitat

Under the project on Application of Remote Sensing for management of coastal habitats sponsored to Space Application Centre, Ahmedabad, a methodology for eco-geomorphological zonations for selected coral reefs in the Gulf of Kachchh, Lakshadweep Islands, Gulf of Mannar and A&N Islands, using Indian Remote Sensing Satelitte's (IRS) LISS III and panchromatic data, was developed. Coral reef features such as reef slope, reef crest, algal ridge, boulder bed, outer reef, inner reef, coral knolls, etc., have been identified. A methodology for identification of major mangrove communities such as Avicennia, Rhizophora, Sonneratia, Brugeuria, Ceriops, etc., was also developed using IRS LISS III and PAN data. This work was carried out in selected areas of Gulf of Kachchh, Goa, Coringa, Bhitarkanika, Sunderbans and A&N Islands.

Digital database on land use, coral reef, etc., for A&N Islands and criteria based models were developed to classify coastal zone, based on environmental sensitivity as well as coastal regulation zone requirements.

3. Determination of No Impact Zone for Pulicat in Tamil Nadu and Coringa in Andhra Pradesh

The objective of the project is to determine the physical limits from the boundaries of the critical habitats, especially along the coast that will not experience any adverse impact, in case the developmental activities like establishment of ports, shore protection measures and waste disposal pipelines are located outside these limits. The projects undertaken at Pulicat lake and Coringa mangrove have been completed. The impacts of existing structures like breakwaters of Ennore port for Pulicat lake and breakwater of Kakinada port for Coringa mangroves were analysed. It has been found that at the existing physical location of northern breakwater of Ennore port, there has been no immediate danger of erosion of the sandbar at Pulicat lake. However, any structure such as shore protection measures if planned north of northern breakwater of Ennore creek, may cause erosion at the mouth of the lake and surroundings. In case of Coringa mangroves, a scenario has been generated on the water quality of mangrove areas in the absence of port, as the breakwater of the existing port affects the volume of seawater that enters into the mangrove areas. It has been found that the presence of breakwater at the current location has resulted in the decreased flow of tidal water in the mangroves, thereby resulting in low levels of dissolved oxygen in the interior mangrove areas.