Our services for the environmental sector allow for effective landscape and infrastructure analysis for use in planning and maintenance activities. We can also assist in the design and placement of dams and water transmission and distribution infrastructure.
- Dam placement and design
We use aerial LiDAR to survey proposed dam locations and use the detailed datasets to carry out a planar flood model analysis in order to calculate the maximum flooding that will occur for a given dam design, the volume of water that will be held, and the impact on the local population. Terrestrial laser survey technology to provide accurate and high resolution data for smaller dam sites, particularly in mountainous areas that are hard to survey using conventional methodologies.
- Floodplain mapping and analysis
We deliver topographic mapping of floodplains for use by hydrologists in floodplain analysis exercises. This includes hydrological enforcement during the production stage of our Digital Terrain Models to ensure that water will follow its ‘true’ path in the survey dataset through culverts and under bridges etc.
- Water transmission and distribution planning and engineering
Utilising our survey capabilities and innovative routing and design technology, we are able to assist with the earliest design phases for water transmission and distribution planning. During the macro routing stage, six layers are used to numerically populate the area and weighted according to the project requirements. Appropriate routes are then narrowed down in the micro routing stage, before a LiDAR/CAD workflow is used to identify the optimal alignments. Our approach delivers routes and final designs that best consider all socio-environmental and performance factors while reducing Bill of Quantities costs.
- Coastal inundation mapping
Sea level rise, increased storm intensity (with storm surge) and changes in inland rainfall runoff are all likely to occur under the current minimum impact IPCC climate change scenario with potential impacts including flooding, beach erosion and salt water inundation. Airborne LiDAR and its geospatial framework find a role in providing baseline information for decision support in the range of adaptation and mitigation activities that are required to overcome this serious threat. They allow decision makers to understand:
- Where are the pieces of critical transport and communications infrastructure that will be affected by a sea level rise?
- Where must we update water barriers such as levies in order to deal with increased storm runoff and tide surges?
- Where will we see coastal vulnerability in a climate change scenario based on sea level rise, increased tide reach and storm surge impacts?
- Water shed assessment
Point coverage generated from LiDAR data is converted into a ‘hydrologically correct’ DTM, which takes into account the effect that features such as culverts or bridges have on flow direction. Flow direction is then calculated in a GIS platform through the use of complex algorithms, which assess how water flows from each cell to its steepest down-slope neighbour.
To find out more about how we can assist with your project please contact us to speak to a member of the team.