Silt and sediment can build up in a canal over time and this results in a decrease in water levels, or at worse the canal might eventually dry out. Sediment and silt is formed by a variety of things, typically waste matters such as leaves, fallen trees, fishing and animal waste in the water, which can all help create a build up of sediment or silt. Excess soil washing into the canal and dead aquatic plants also contribute to that build up of silt. As the organic matter in the canal increases, it may eventually become necessary to remove the silt by means of dredging with mechanical equipment and other means.
With any canal dredging product the first stage is generally finding out how much silt needs to be removed. An accurate calculation is required to establish the best approach to removing the silt or sediment and to help understand where best to place the silt after removal. It’s possible to establish the consistency of the silt, from silt samples and a bathymetric survey, which gives a guideline to the time frame required for the removal process.
Heathland Aquatic Engineering use the latest technology to gather the necessary information about silt and sediment levels in a canal. These silt surveys can be undertaken using two different methods;
A silt survey completed using either of these techniques will also provide detailed information about the canal bed itself such as the different hard and soft materials there. Both of these methods of silt surveying will give a detailed analysis of the canal bed.
There are a few differences between the two canal surveying methods, but not with the information that can be acquired, just with the method of use. The remote ASV drone is easily manoeuvrable and can be lifted by two people, so requires little access to the canal, whereas the manned survey boat will require an access point to get into the canal. The ASV drone is also able to auto-navigate the canal section in some situations and can complete the survey where visual access is restricted or impossible. Due to this, the ASV drone has proven to be a huge benefit to many of our clients and has the added benefit of not causing any real disturbance to the area of the canal that’s being surveyed.
From using GPS enabled equipment, our trained operatives are able to obtain a full silt survey report from the canal, which clearly identifies any problem areas, giving us the means to accurately produce quotations for the removal and disposal of unwanted silt from those areas of the canal that are silted up.
We supply all the canal surveying equipment and our services to domestic and commercial clients throughout the United Kingdom. For more information and advice about Hydrographic canal surveys or any of our surveying services or products, such as pond construction, lake and pond maintenance or fishery and consultancy services, please email email@example.com or call 0800 3891990.