Technology Projects > Coastal Environmental & Engineering > Activities
Performance assessment along Indian coast to assist in design of environmentally friendly structures for coastal protection
The project aims in developing solutions for sustainable management of coastlines with potential stakeholder interests like industry, fishing, tourism etc. Presently field demonstration of submerged dyke installation is completed at Kadalur (KPK) fishing villages in Tamil Nadu and performance monitoring is being carried out. Design of shore protection schemes for Bommayapalayam and Mahabalipuram, oceanographic observations at Kadalur Periyakuppam, Chennai coast and Vizhinjam are undertaken upon the request by the stakeholders. The design submitted to Government of Tamil Nadu for Bommayarpalayam is awaiting approval for implementation by state Fisheries department.
Demonstration of environmentally friendly shore protection measures for fishing villages off Kadalur
Completed the installation of submerged dyke covering all the three villages.
Continuous monitoring of shoreline and submerged dyke being carried out.
Beach width of 40 m has formed along the Chinnakuppam village coastline
Beach has grown in front of Periyakuppam and developing in Aazhikuppam
All the three villages were protected from erosion during high waves generated during Gaja and Phethai cyclones of December 2018.
HMoES Dr. Harsh Vardhan has dedicated the restored beach to the nation on 24.01.2019 at Kadalur Periyakuppam in the presence of Secretary, MoES.
Beach growth observed at Chinnakuppam, Periyakuppam and Aazhikuppam
Dedication of restored beach at Kadalur villages to the nation by
HMoES Dr. Harsh Vardhan
Development of design criteria for extreme environment by assessment of waves, currents and tide parameters
Coastal Monitoring System
The coastal monitoring system has been established for Indian coast, which provides tide and met ocean parameters along the Indian coast.
Operation and maintenance of coastal monitoring system network of 6 tide stations & 8 automatic weather stations
Data is transferred to ftp server in real time through GPRS modem.
The dynamic webpage has been developed to link with database to view the real time data.
Surge height observed from tide gauge during Gaja cyclone on 16-Nov-2018.
Carried out tide analysis of 19 stations observed along Indian coastal waters since 2010. The tide prediction tool has been developed for tidal predictions and tidal constituents for model boundaries.
Wave:
Wave model for North Indian Ocean is forced with ECMWF wind field for the period of 1998-2012 and validated with NIOT, INCOIS & NIO observed wave data.
Information on annual and monthly variability of various wave parameters in graphical form
The long term statistics of wave parameters are available in both – hard copy as well as web versions
Wave simulation between 2016 and 2017 with revised mesh including Islands were carried out. The deep and shallow water observations were compared with model results.
The procurement of high resolution ECMWF wind data for wave model studies between 2017 and 2020 has been approved and 0.1 deg high resolution wind data covering North Indian Ocean upto Dec-2018 were downloaded.
Surge observation during Gaja cyclone
Indian Coastal Ocean Radar Network (ICORN)
Indian Coastal Ocean Radar Network (ICORN) operated and maintained by CEE division of NIOT runs ten HF Radar systems along Indian coasts. This project is under Ocean Observation Network (OON) Program of MoES. The data from ten remote sites are transferred simultaneously to central servers at NIOT, Chennai as well as INCOIS, Hyderabad. The data is disseminated to various research organizations and academia through INCOIS.
ICORN has conducted a workshop on HF radar network along Indian coasts during 24 & 25 January 2019. The workshop was attended by nearly 120 participants from academia, research organizations and Industry (OEMs). A manual for the QA/QC of HF Radar data and proceedings of the workshop were unveiled by the secretary of MoES.
Future Expansion plan of the Indian Coastal Ocean Radar Network (ICORN) has been approved under Ocean Observation Network (OON), program of MoES and is in the process of tendering.
Geophysical Investigations at Gulf of Khambhat and Gulf of Mannar
In order to develop offshore wind farms in Gujarat and Tamil Nadu region, NIWE proposed to carryout geophysical investigations such as bathymetry, side scan sonar, sub bottom profile, and magnetometer surveys and to determine the borehole locations at 5 locations each at Gulf of Khambhat, Gujarat covering an area of 135 sq.km and Gulf of Mannar, Tamil Nadu covering an area of 240 sq.km. Met Ocean observation, particularly of wave and current for one month is measured for validating the model results (Tide is included as a part of bathymetry survey).
NIWE decided to extend the area in order to develop 1GW of offshore wind farm project, it is decided to carry out the Geo-physical survey to cover additional area of about 167 sq. Km off Jaffrabad in Gulf of Khambhat. In the view of above, the total area of geophysical survey at Gulf of Khambhat increased to 302 Sq. Km (135+167).
NIOT in collaboration with NIO, CSIR-Goa has started field programme at Jaffrabad, Gulf of Khambhat during Dec-2018 by mobilizing two tugs for tide and wave instrument installation. The bathymetry and sub bottom profile survey started in last week of the Dec-2018 and completed during last week of Jan-2019. The grab sample surveys at 25 locations were carried out during Dec-2018 in Project site. The side scan and magnetic survey has also started during second week of Jan-2019.
Topography Survey and Hydrologic studies for IMU Headquarters, Chennai.
NIOT has started reconnaissance survey during mid week of October-2018 and started static survey at 5 locations inside IMU boundary for horizontal and vertical datum. The RLS based tide gauge was installed at 12-10-2018 at Buckingham canal bridge top inside IMU campus. The topographic survey was started from 16-10-2018 with 10m by 10m grid and covered 75% of the area. The water quality samples at two locations in Buckingham canal has been carried out at the end of the October-2018. The hydrology model was simulated with surveyed topographic data and submitted to client as interim report.
Shoreline change analysis of Vizhinjam coast using satellite images
Shoreline change assessment carried out for the years 2000-2018 using high resolution (LISS IV-5m) data and corresponding beach profile analysis (at Valiyathura) has been done. Validation of shoreline derived from the satellite image with the beach profile data. Comparison of shoreline derived from satellite image with the field data. Location specific analysis (satellite image and beach profile) of high erosion site Valiyathura
A Final Annual report comprising the above analysis has been submitted with the periodical half yearly and quarterly reports.
Scientific studies for sustainable opening of Cooum river mouth
NIOT has been entrusted with the project for designing a sustainable solution for keeping the Cooum River mouth open and providing an ecofriendly solution.
Collection of data involving bathymetry, tide, grab sample collection, water quality, biological, Geotechnical measurements in the open sea and upstream Cooum River upto 10 km and Identification of measures necessary for maintaining minimum tidal interaction in order to harbour aquatic ecological biodiversity in the River.
Field data collection and numerical modelling has been completed
Draft final report has been submitted to client (TNUIFSL) with proposed schemes (i)Bypassing of sand from south to north (ii) Extending the existing River training walls/Jetties (iii)Constructing Weir Jetty system.
Shore Protection Studies at Poonthura, Valiyathura and Shanghumugham Beach along Thiruvananthapuram
Kerala State Coastal Area Development Corporation (KSCADC) has requested NIOT for providing suitable mitigation scheme to arrest/minimize the coastal erosion at Shangumugham beach, Valiyathura and Poonthura along the Thiruvananthapuram coast, Kerala. Shoreline change studies carried out using satellite imageries and beach profiling data. Volume of beach loss is estimated.
- Sediment transport studies carried out using DHI LITPACK. Secondary data used as input for model studies.
- Based on initial assessment a preliminary report is submitted evaluating various shore protection options such as
- Sand nourishment, Segmented submerged dykes &Groyne system
- Field data collection, numerical modelling and detailed engineering will be carried out to finalize suitable shore protection scheme.