Desalination Surveying
Site planning and surveying for desalination plants. El-Eman Office provides coastal infrastructure surveying.
Coastal survey and choosing the intake location
The first need in desalination plant surveying is to understand the coastline and the nearby seabed. The seawater intake must sit deep enough to avoid suspended sand, debris and waves, and away from sewage outfalls and pollution. A marine survey uses depth-sounding equipment with accurate positioning by GNSS.
- Draw a depth map and determine the bed slope and intake pipeline route.
- Locate existing marine structures and pipes and avoid crossing them.
- Record the approved reference sea level to tie the plant levels to it.
Site levels and hydraulic flow
The plant pumps seawater through treatment stages, so levels affect energy consumption. An accurate topographic survey helps the designer place basins, buildings and tanks at levels that let some stages flow by gravity and reduce pumping height. Protection levels against waves and storms are also set.
- Survey the site and produce a digital elevation model.
- Set structure levels to balance cut and fill.
- Draw routes for raw water, product water and brine lines.
- Set out the axes on site and keep checking during construction.
Brine outfall and environmental monitoring
Desalination produces a highly saline brine that needs a well-planned discharge so it does not harm the marine environment. The survey fixes the outfall location, current direction and how the brine spreads. Regular monitoring of shoreline and seabed changes helps detect erosion or sediment build-up around the intake and outfall early.
- Avoid mistakes such as relying on old data for depths that change.
- Repeat measurements after storms in active areas.
- Coordinate survey results with environmental studies and official requirements.
Surveying buried installations
Desalination plants contain dense networks of buried pipes and cables, and losing track of their positions causes problems in maintenance or expansion. Every line is therefore surveyed before backfilling, with its coordinates, level, diameter and type, and recorded in a database or detailed map. This data helps avoid damaging lines during later excavation and supports planning new projects nearby.
- Survey valves, manholes and branch points accurately.
- Link each element to a unified numbering that matches operating drawings.
- Keep backup copies of the files with the owner and the operator.
Frequently asked questions
Why does the water intake need a marine survey?
Because the depth and nature of the seabed and the movement of sand decide where a safe intake can go. An error can cause blockage or drawing in debris, raising treatment and maintenance costs.
Are old maps enough for design?
No. The seabed and shoreline change, so designs need recent measurements before approval, especially when fixing pipe lengths and positions.
What is the surveyor's role during construction?
Setting out axes and levels, monitoring the installation of pipes and basins, and surveying the final position of structures for handover and future maintenance.
