Sediment quantification in Stormwater Retention Ponds
Client’s Challenges:
The city conducted annual bathymetric sediment surveys in their stormwater pond facilities to determine water and sediment volume and hydraulic capacity.
Hydrasurvey’s Solution:
Hydrasurvey was thrilled to be awarded the cities bathymetric survey bid. Proposals were evaluated on capabilities and merit. They evaluated the company profile, pricing, schedule of work, methodology, key personnel and similar completed projects. They also evaluated the companies stringent safety qualifications, insurance and WCB supporting documentation.
The deliverables included:
Ability to identify perimeters and gain access to ponds covered in densely overgrown cattails.
Collect composite sediment samples from each body of water, samples are tested at an accredited lab.
Determine sediment volumes and capacity in all ponds. Overlay maps showing actual bottom contours and water level. These 3D sediment maps were built with drones and unmanned survey vessels featuring single beam sonar. The 3D sediment maps were overlaid onto drone photography.
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