Beach Erosion Surveys
Beach erosion surveys often require profiling above and below the water.
They are repeated at varying intervals to determine the erosion level and determine where the sand is transported due to typical ocean processes and storm activity.
The uplands or above water portion can determine if the level or position of the beach is changing and the below water portion tracks the movement of material and shoals offshore.
We use RTK GPS for horizontal and vertical positioning. The uplands are surveyed with a RTK backpack system and the portion in the water is surveyed either with a small boat and an echosounder or a Personal Water Craft (PWC) towing a sled. The PWC is particularly effective in areas where shallow water and surf make the use of a small boat and echosounder difficult.
For a large survey in Alaska we put RTK GPS and a low cost pitch, roll and heading sensor on an all terrain vehicle and were able to work quite rapidly in a tidally controlled area.
Related Projects:
- NOAA - Alaska IDIQ Contract for Hydrographic Surveys and Related Services
- Various Locations, Alaska
- Since 1998, we have supplied the U.S. Department of Commerce, National Oceanic and Atmospheric Administration (NOAA) with hydrographic data of 100% bottom coverage with shallow-water multibeam sonar systems.
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- Kivalina Village Relocation
- Kivalina, Alaska
- We were contracted by the U.S. Army Corps of Engineers (USACE) - Alaska District to provide surveying services for the relocation of the village of Kivalina, Alaska. Services included aerial photography, topographic and hydrographic surveys, and support for field measurements of the existing town-site. The resulting services produced a storm surge analysis for possible relocation of the village.
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- Homer Spit Beach Condition Surveys
- Homer, Alaska
- Tasked by the U.S. Army Corps of Engineers (USACE) - Alaska District, TerraSond conducted beach condition surveys on the Homer Spit in Alaska. Ground topographic surveys were performed using Real-Time Kinematic (RTK) Global Positioning System (GPS) control methods.
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- USACE - Alaska IDIQ Contract for Hydrographic Surveys and Related Services
- Various Locations, Alaska
- Since 1995, we have provided the U.S. Army Corps of Engineers (USACE) - Alaska District with hydrographic, topographic, and Global Positioning System (GPS) control surveys; aerial photography; LiDAR mapping; and tide studies on over five hundred projects throughout Alaska.
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- USACE - Texas IDIQ Contract for Hydrographic Surveys and Related Services
- Various Locations, Texas
- Since 2003, TerraSond has provided and continues to provide hydrographic surveys and related support services for the Galveston District of the U.S. Army Corps of Engineers (USACE).
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