Hydrographic Surveys

With a deep understanding of the challenges of surveying underwater environments and their environs, Murphy Geospatial offer unparalleled experience and efficiency. We are specialists in inshore and near-shore hydrographic surveys from inland waterways to rivers, lakes and coastal survey.

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good hydraulic model relies heavily on the data inputs used to build the model, particularly the existing bathymetry of the watercourse and topography of its banks and surroundings. Therefore accurate, verified survey data is a key element of a reliable hydraulic model which then enables the planning and design of flood defence measures where necessary. Consequently, the certainty provided from a reliable model can maximise the return on investment in planning of flood management programmes. 

Our near-shore and coastal surveys help our clients understand the changes in bed levels next to key shipping and harbour channels, and to predict the severity of coastal erosion. The data we generate is used to monitor changes along our coasts which are constantly in flux. Our data is used to plan coastal defence barriers or plan dredging operations ensuring that our key harbour infrastructure remain operational. 

 

As the world adjusts and adapts to the challenges of climate changeaccurate hydraulic modelling of our watercourses is critical to predicting the behaviour of rivers during heavy or prolonged rainfall events.

Murphy Geospatial deliver high-quality hydrographic surveys through a combination of our people, process and technology. We have used our experience on the CFRAM programme to train our hydrographic surveyors with the specialist techniques required. Hydrographic surveying is generally carried out in challenging environments and safety is core in all our field workflows and processes.  

To support our experienced surveyors, we have invested in a wide range of specialist equipment such as boats, jet canoes, hovercraft, echo sounders, tide gauges, sonar scanners, magnetometers, laser scanners, remote sensing and integrated UAV / drone technology. These tools, when operated by our experienced professionals, enable the delivery of highly accurate, fast and cost-effective hydrographic surveys. We are specialists in inshore and near-shore hydrographic surveys from inland waterways to coastal surveys of any scale. 

The hydrographic survey team at Murphy Geospatial have established efficient and effective workflows to deliver verified geospatial data from the field and process it for use in all commercial flood modelling softwareThese workflows were honed from our role as principal hydrographic survey contractor for the CFRAM programme in Ireland, consisting of more than 43,000 river cross-sections – the largest hydrographic survey in Europe at the time in the early 2010s

  • Bathymetric surveys 
  • Channel surveys 
  • Cross sectional profiles 
  • Coastal erosion surveys / monitoring
  • Flood defence asset assessment 
  • Flood surveys (24/7 emergency response service) 
  • Threshold surveys 
  • Flood modelling  
  • GIS data conversion 
  • Inshore hydrographic survey 
  • Material sampling 
  • River, lakes and coastal survey 
  • Scour inspection and investigation 
  • Tidal/Flow monitoring 
  • Topographical survey 
  • Survey data compatible with modern flood modelling software  
  • ISIS, MIKE and HEC-RAS deliverables 
  • Survey data to enable preparation of dredging plans 
  • Survey data to enable design of flood defence structures 
  • Visualisation of river, lake, harbour and channel topography 
  • River cross-sections 
  • Multi-beam sonar deliverables 
  • Pre-development advice 
  • Integrated channel, floodplain and threshold surveys 

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