|
Hydrographic Survey |
| |
|
| |
|
| |
Multibeam and Singlebeam Sidescan |
| |
|
|
Echosounder |
| |
|
| |
An Echosounder sends out a sound pulse and waits, for its echo reflected from the seabed. The velocity of sound is a known quantity and hence the time elapsed is a measure of depth. |
| |
|
| |
|
|
Comparison of Single Beam and Multi Beam Echosounding |
| |
|
| |
|
| |
O/P: SingleBeam Vs Multibeam |
| |
|
|
Multibeam Bathymetry Survey |
| |
|
| |
|
Depth in MM |
|
| |
|
|
Equipments-Geophysical |
| |
|
Sidescan sonar image |
|
Sonogram of rock exposure |
|
Critical Area Applications of Multibeam / Side Scan |
|
Sub-bottom Profiler |
|
Magnetometer-Geometrics |
|
| |
|
| |
|
|
SIDESCAN SONARS |
Sidescan sonar image of a rock
exposure in the sea bed - Vizhingam |
| |
|
|
|
Sonogram of rock exposure seen rising above the sea bed - Vizhingam
|
| |
|
|
| |
Critical Area Applications of Multibeam / Side Scan
|
| |
|
| |
|
Large and expensive rock dredging problems like Sethu Samudram project needs Multibeam surveys
|
|
Individual rock outcrops can be located only by Multibeam |
|
Accurate volume computations possible only with Multibeam |
|
Location of hazards within ports like incomplete removal of jetty piles, sunken ships etc., possible only with Multibeam pseudo side scan |
|
| |
|
| |
|
|
SB 512 EDGETECH |
SB216S EDGETECH |
|
| |
|
|
|
SPARKER AND BOOMER APPLIED ACOUSTICS
|
PRINCIPLE |
|
| |
|
| |
|
| |
SUB-BOTTOM SECTION |
MAGNETOMETER GEOMETRICS |
| |
|
| |
|
|
| |
Principles
|
Principles
|
|
Wave & Tide Measurements |
| |
|
| |
|
| |
| |
|
|
Used to measure tide variations |
|
Primary force for movements of water, sediments and pollutants in coastal areas |
|
Influences navigation safety, siltation |
| |
|
|
| |
|
| |
|
|
Almost all projects required tide measurements |
|
Six automatic gages |
|
Online transmission |
|
Tide poles also extensively used |
|
| |
|
|
|
Wave Rider Buoy |
|
| |
|
|
| |
|
|
| |
|
| |
|
Measures wave height for wave periods of 1.6 to 30 seconds 1 cm precision in all directions (free floating) Measures wave direction |
|
GPS for buoy monitoring and tracking through HF link |
|
Internal logger |
|
Led flash antenna |
|
0.9 m diameter spherical hull of AISI 316 |
|
Optional Cunifer hull, warranted not to corrode |
|
1.7 years battery life |
|
HF transmitter range 50 km over sea |
| |
|
|
|
Current Meters |
| |
| |
|
|
Profiling Current Meters |
|
Comparison of Single and Profiling Current Meter |
| |
|
|
Used to measure speed and direction of water |
|
Navigation safety, movement of sediment and pollutants |
|
Single point, profiling currents meters |
| |
|
|
| |
|
|
| |
|
|
| |
|
Twelve Single Point current meters |
|
Two Bottom tracking current meters |
|
Three ADCPs |
|
One Horizontal Current Meter |
|
| |
|
| |
|
|
| |
|
|
|
| |
|
|
|
|
ACOUSTIC DOPPLER CURRENT PROFILER RDI CS150I-UG2
|
|
|
| |
Comparison of Single and Profiling Current Meter |
| |
|
|
Geotechnical Investigations - Gulf of Khambhat |
| |
|
| |
|
|
|
Alternative deployment method
|
CONE PENETROMETER ROSON SYSTEM
- 100 KN
|
|
| |
|
|
Equipments - Geotechnical |
| |
|
| |
|
Max Penetration: 2.75m |
|
Core Diameter: 76 and 108 mm |
|
Max working water Depth : 150 meter |
|
Drive : 2 synchronized Electrical motors |
|
Weight : 100 Kg |
| |
|
|
| |
ELECTRICAL VIBRO CORER SEABED SYSTEM- SVC 300 E
|
| |
|
|
|
|
Underwater Inspection Surveys |
| |
|
| |
EVALUATION OF CHARACTERISTICS OF INACCESSIBLE LOCATIONS |
| |
|
ASSESSMENT OF STRUCTURAL INTEGRITY OF DAMS & PIERS |
|
PRAKASAM BARRAGE |
|
DONKARAYI DAM |
|
| |
|
| |
|
| |
|
|
|
ROV - Openframe MiniROVER MKII
|
|
|
| |
|
|
Training Capabilities |
| |
|
| |
NIOT has conducted a number of training programs for |
| |
|
DCI (Dredging Operations) |
|
Tamil Nadu Govt. (Coastal Zone Management and HTL/LTL) |
|
Port and Harbor Sector (Design aspects) |
| |
|
| Facilities at NIOT permit complete exposure |
|
State of the art instruments |
|
Research Vessels |
|
Unique training facilities allowing interactive computer based participation |
|
Demonstration of backward and forward integration |
|
Maintenance and quality/accuracy requirements |
|
| |
|
