How is silt and sediment formed in a lake?
Silt and sediment is formed because of debris from variety of sources that generally includes organic matter such as leaves, fallen trees, decayed aquatic plant life, fish or animal waste. Over time lakes can become shallow and eventually dry out due to the build up of sediment and silt. Other things can play a large part in this process, such as soil washed in by streams and rivers, which may flow in one end and out the other. As the organic matter builds up it may eventually become necessary to remove the silt by means of dredging with mechanical equipment or other means.
As a general rule the first stage of any lake dredging project is to establish exactly how much silt will need to be removed from the lake. This is required to establish both the best means of removal and to work out where is best to place the silt once it has been removed. From silt samples and a Bathymetric survey, we are able to establish the consistency of the silt, which gives a guideline to the time frame required for the removal process.
We use the latest silt surveying technology
At Heathland Group we use the latest technology to gather the information required about silt, we have two different techniques that we use to collect this information;
- A 16ft Manned Survey vessel
- A Remote Survey ASV Drone
Although both options achieve the same results and are able to give detailed information about the lake, there are variations between the two in regards to handling and access. Other information will be provided by the survey, for instance information about hard materials, such as stone and rock and softer areas such as sand etc.
ASV Drone for Silt Surveying
The ASV drone has been hugely beneficial to many of our clients and is exceptionally good in areas where the minium of disturbance is imperative. Whereas the manned survey boat requires an access point, the ASV drone is easy to lift and manoeuvre between two people and access requirements are minimal. In certain situations the drone is able to auto-navigate the lake and complete its own surveys, where visual access to the entire lake is impossible.
Using GPS enabled equipment, we are able to generate a full report, which can clearly identify the problem areas and enables us to accurately produce quotations to carry out the clearing of unwanted silt from lakes.
We supply all equipment and our services to domestic and commercial clients throughout the United Kingdom. For more information and advice about Hydrographic surveys or any of our products, such as pond construction, lake and pond maintenance or fishery and consultancy services, please email [email protected] or call 0800 3891990.