• HYDROGRAPHIC SURVEYS

HYDROGRAPHIC SURVEYS

 

One of the specialized field of CASPIAN GEOMATICS is hydrographic surveys. We carry out bathymetric and SONAR (Side Scan Sonar) survey works on water objects (sea, river, lake, water reservoirs). We implemented depth measurement in different depths of the Caspian Sea as well as in shallow areas and carried out geophysical investigation.  We have prepared bathymetric map and models, erected 3D models of bottom relief, carried out SONAR (Side Scan Sonar) survey in the sea basin and obtained high resolution images, erected profiles within framework of our implemented numerous works.  Furthermore, based on Side Scan Sonar inventory of underwater objects have been done and mapped, underwater objects classified and sizes determined. At the same time we have both single-beam and multi-beam survey methods which these survey methods have been widely used on some objects. Furthermore, remote sensing methods are widely used as well. We widely use mainly in monitoring sea level, comparative analysis issues, determination of flooding, detection of change, studying dynamics of object and cases and etc.  We carry out bathymetric surveys with different methods. These methods include tachymetry and GPS survey methods, single-beam or multibeam survey methods with boats or small type ships, aerial laser scan survey, SONAR surveying methods.

Methodically, at the initial stage of processing SONAR data visual examination is carried out in accordance with the distance set from the right and the left board due to the depths, then it is correlated and interpreted.  Unknown underwater objects are discovered in acoustic images and analyzed. These objects include hard rock projections and communications, stones, different reinforced-concrete piles, different diameter pipes and etc. as well as relief and we thoroughly analyze these discovered objects.  Volume, size, contour and coordinates of objects in the image are selected and transferred to a map through special program. During implementation of bathymetric and SONAR surveys geodesy assurance is reviewed and works are exactly carried out.  It should be noted that our staff have both international Safety certificate and trained based on model courses of International Maritime Organization (https://www.imo.org/). The specialists of our staff have been certified in Elementary First Aid, Personal Survival Techniques, Fire Prevention and Fire Fighting, Personal Safety and Social Responsibility. We have carried out bathymetric and SONAR (Side Scan Sonar) surveys with different purposes. Generally, SONAR surveying work is used specially with the purpose of determination of structure of area relief where oil, gas, water, power lines will be laid, underwater objects which will make an obstacle for laying them, technical condition of the existing pipelines and their point of intersection, structure of the relief for accommodating hydraulic facilities, hard rock projections, as well as obtaining acoustic images of sea floor relief. At the same time, SONAR surveying work is widely applied for implementation of submarine analysis of beaches. Besides, bathymetric and SONAR surveys is used for investigation of condition before deepening of bed. If any underwater object is observed during SONAR survey, its size is calculated based on a special program and interpreted. Sizes of observed underwater object are written and the same objects are mentioned on a map with a coordinate in a form of point.  These sizes include length, width and height.  Underwater communications are mentioned along a line as is done for an acoustic image. In case there are gaps at the bottom side of pipes their length and height from the ground up to pipe are presented on a map. But hard rock projections are fixed in the program in the form of points, after interpretation it is contoured over a map with coordinates.  Parts of basements that are underwater or its broken sides are warned on a map with certain marks. Consequently, if there are relevant wastes on bottom relief, inventory map of objects are prepared.   At the end, we submit a report to a Client. The report provides thorough explanation of applied methodology with regard to both bathymetry investigation and results of SONAR survey, used equipment, maps and models that have been prepared, inlaid images etc.  At the same time, we submit to a Client risk evaluation schedule, Emergency Situations Plan and Health Safety and Environment policy prepared based on a site visit carried out in advance.

Bathymetric and SONAR surveys provide the following results:

  1. Find out dangerous zones and underwater objects for safe movement of different purpose ship and boats
  2. Searching sunken underwater objects
  3. Identification of potential dangerous underwater objects
  4. Erection of underwater bottom relief model
  5. Fixing profiles in accordance with the model and calculation of volume
  6. Classification, inventory and mapping of underwater objects
  7. Inlaying acoustic images
  8. Bathymetry mapping, making 2D and 3D models

 

 

 

 

 

 

 

 

 

 

 

We carry out bathymetric measurements and SONAR survey in accordance to its difficulty rate. CASPIAN GEOMATICS have all opportunities for implementation of prospecting works in shelf sea, lakes, rivers and water reservoirs.

 

SOME OF THE SIMILAR PROJECTS WE HAVE DONE

  1. Implementation of Bathymtric survey in the delta and on the basin of the Caspian sea    https://caspiangeomatics.com/implementation-of-bathymetric-survey-in-the-delta-and-on-the-basin-of-the-caspian-sea/
  2. Implementation os SONAR (Side Scan Sonar) and Bathymetric survey on the Caspian sea basin    https://caspiangeomatics.com/implementation-of-sonar-side-scan-sonar-and-bathymetric-surveys-on-the-caspian-sea-basin/
  3. Performing Bathymetric investigation in southern coasts of the Caspian sea   http://caspiangeomatics.com/performing-bathymetric-investigation-in-southern-coasts-of-the-caspian-sea/
  4. Performing Bathymetric survey in local areas on basin of the Caspian sea  http://caspiangeomatics.com/performing-bathymetric-survey-in-local-areas-on-basin-of-the-caspian-sea/
  5. Performing Bathymetric survey in offshore territory of the Caspian sea   http://caspiangeomatics.com/performing-bathymetric-survey-in-offshore-territory-of-caspian-sea/
  6. Boyukshor lake remediation project Phase 2 – Engineering and Supervision  http://caspiangeomatics.com/boyukshor-lake-remediation-project-2/

See also:

Remote Sensing
Geological & Geophysical surveys
GIS Solutions
Geodesy & Photogrammetry
Cartography