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- #Hydrographic survey system dgps, echo sounder, hypack ashtead update
- #Hydrographic survey system dgps, echo sounder, hypack ashtead software
#Hydrographic survey system dgps, echo sounder, hypack ashtead update
It is, therefore, necessary to update the bathymetric chart covering, which would be compared with the earlier bathymetric survey equipment for investigating sediments (Accretion and Erosion) and dredged region area. In the absence of mining exercise, there is a need to investigate and account for sediment deposit or eroded, so that proper planning responses can be implemented. The bathymetric survey equipment is important for the production of the up-to-date bathymetric chart, due to mining exercises opined by local miners and licensed dredging companies. Further processes have to do with spike removal, HYPACK matrix generation and possibly preparation of schema for ideal data structuring then the production of a bathymetric chart.Ī proper environmental impact assessment needs to be done in order to assess the level of impact caused by man and nature, especially as it concerns coastal waters. The reduction applicable to sounding depth is done based on the rise and fall differential subtraction for gauge data using an instantaneous timing interval for each sounding point. Tidal observation is conducted prior to and concurrently with sounding operations period and can be done on the established gauge or temporarily on any selected position where the water level hardly goes below the zero reading of the measuring device (Temporary gauge). Producing a bathymetric chart tidal observation and reduction is a must to reduce the sounding depth to chart datum. Bathymetric Survey Equipment Bathymetric survey costĬomparison of digital bathymetric data for the same region but different time periods provides a method for estimating or calculating the net movement of sediment into (accretion) and out of (erosion) a study area. Resurvey policy especially that of bathymetry gives bounds for the reliability of identified sea erosion and accretion areas, determination of sediment transport pathways, the magnitude of sediment transport estimates, and the validity of sediment budget estimates. Updating of bathymetric chart is a daunting task and cannot be overpassed due to its importance in estimating or determining temporal changes in an ocean floor which in effect provides accurate information for public usage, in terms of planning, engineering design, construction, operation, maintenance, and regulation of navigation, flood control, river engineering, charting, and coastal engineering projects. It can also be done prior to pipeline and cable (laying) positioning, fishing, and other geophysical exploration exercises. Pre- and post- dredging survey data collections allows us to better plan and execute our dredging projects and offers an extra measure of quality control throughout the life of a project while minimizing the need for, and costs incurred by, utilizing outside sources for hydrographic data collection and reporting.Bathymetric survey equipment are important for many purposes such include sedimentation purposes to check for accretion or erosion, pre and post dredging bathymetry, that is to determine the existing status of the water body or to ascertain the dredged volume. HYPACK MAX is used on-board our custom-built survey vessel along with Trimble GPS and our Teledyne Odom echo sounder to collect hydrographic survey data. Up-to-date progress status is always available by utilizing the “matrix file” update functionality within DREDGEPACK. Incorporating dredge limits and design grade information, the systems allow our operators to maximize productivity by dredging efficiently, within limits and to grade without over-dredging or operating outside of project limits.ĭREDGEPACK reporting capabilities allow us to monitor and report progress on a regular, automated basis. More specifically:ĭREDGEPACK coupled with our Trimble GPS receivers provides real-time positioning and guidance to our dredge operators.
#Hydrographic survey system dgps, echo sounder, hypack ashtead software
This software and hardware combination affords us dredge guidance / tracking capabilities and supports our in house bathymetric data collection efforts as well. In support of its dredging operations, Dredge America owns and operates industry leading hardware and software systems which include HYPACK’s DREDGEPACK and HYPACK MAX software packages, Trimble Navigation differential GPS (DGPS) and real time kinematic (RTK) capable GPS receivers and Teledyne Odom echo sounder.