Hydrographic survey
A hydrographic survey is a set of investigations carried out to obtain detailed information about the condition of a body of water, as well as to collect data regarding its topography and water surface. Some of the hydrographic surveys include:
- Riverbeds
- Reservoir areas;
- Lakes;
- Coastal areas;
- Channels;
- Ponds (irrigation, fish breeding, etc.);
- Ponds for collecting sediments;
- Hydraulic facilities used for treating domestic wastewater, floods, and industrial purposes.
Errors in the survey can result in accidents, time wastage, rework, serious losses, and major man-made disasters. To make efficient design decisions, reliable results of depth measurements, surveys, and others are necessary. Therefore, hydrographic surveys in rivers and other bodies of water must be carried out by professionals using high-precision equipment.
What is included in the engineering hydrographic survey?
When conducting hydrographic surveys in reservoir areas, the sea, lakes, rivers, engineers work on:
- Creation of a high-level geodetic network designed (survey, reference);
- Coastline topographic surveys;
- Channel surveys;
- Depth measurements, including high-altitude justifications;
- Smoothing the water surface;
- Examination of underwater obstacles;
- Tracking ship routes
The work arrangement is determined by the features of the object and the requirements of the technical task. In some cases, additional hydrographic tests are conducted to ensure geological and engineering-hydrological studies.
It is important for you to know!
Hydrographic maps contain information not only about underwater topography. Additionally, alluvial deposits and underwater structures are displayed. The type of investigation conducted depends on the purpose and nature of the design object. Survey research involves familiarization with existing topographic maps, aerial photography materials, reference books, and materials from previous surveys. It is important to understand the object and the area. It is conducted during the framing of the work plan.
Detailed examinations of rivers and other objects are necessary for the following purposes:
- Documentation development of hydraulic structure design;
- Excavation of water approaches for water management, industrial facilities: marinas, ports, forest reception centers;
- Excavation in areas difficult for navigation;
- Clearing the bottom of plant remains, silt, debris.
- Detailed studies are conducted in limited areas. The list of studies conducted depends on the specific object.
- Hydrographic and geodetic document surveys for bodies of water are conducted. Selecting the optimum survey method, framing the survey program. Assessment of the earth's surface and water body conditions and potential risks.
The study of the base and the surface of the water body is dangerous. Therefore, the hydrographic survey team usually moves to the site first to assess the area.
Technical reports include:
- A brief description of the survey site;
- Climate conditions of the survey area;
- Processes and hazardous hydrometeorological phenomena;
- Hydrometeorological knowledge of the survey area;
- Hydrological conditions of the survey area;
- Survey results at the survey site;
- Forecast of possible changes in hydrometeorological parameters;
5 reasons to contact STR GEOSURVEY SDN BHD
Our experts conduct engineering-hydrographic and engineering-hydrometeorological surveys for any complexity.
The advantages we offer:
- A full-time team of engineers with over 10 years of experience;
- Modern technical foundation (tachometer, level, drones, sonar, etc.);
- Years of experience in complex technical hydroengineering facilities;
- Special software for data processing;
- Internal quality control for the work done.
