Tree surveying and assessment

Tree Surveying

Tree surveying is the process of gathering information about trees in a specific area.
This often involves recording data about each tree’s species, height, diameter, health condition, lifespan, and any signs of disease or pests.
Surveys often use the British Standard BS 5837:2012, ‘Trees in relation to design, demolition and construction – Recommendations’. This provides a method for classifying and documenting trees.
The location of each tree may be recorded using GPS coordinates or plotted on a map.
Some surveys may also record more detailed information, such as the tree’s bark texture, leaf shape, flower colour.

Tree health assessment involves evaluating the healthy growth and structural condition of a tree.
Visual assessment should be temporary. Look out for steady decline in tree health, abnormal growth, or unexpected changes in foliage, bark, or branches.
Equipment such as a resistograph or a sonic tomography can help in understanding the internal structure and detecting decay or cavities within the tree.
It’s important to also note signs of pests and disease that may be affecting the tree’s health.
A complete assessment should include examination of the soil conditions and the surrounding environment, as these environment factors can greatly affect tree health.
Check for potential risk factors that could harm people or property, such as dead branches that could fall, or root systems that could disrupt structures.

A Tree Preservation Order (TPO) is a legal protection applied to trees that are of value to the community.
When undertaking a tree survey, it’s crucial to identify if any trees are subject to a TPO.
Any work on a preserved tree, from pruning to felling, requires permission from the local authority.
TPOs aim to prevent any unnecessary damage or destruction of important trees.

After conducting a tree survey and assessment, compile all your findings into a comprehensive report.
Your report should clearly summarize the results and observations and include any data collected from equipment.
Mapping and photographic records of the site can contribute greatly to the comprehensibility of the report.
The report should also include any recommendations for tree maintenance, disease treatment, or risk mitigation.
If trees that are subject to a TPO were surveyed, include corresponding details in your report.

This content can be used for studying the key aspects for tree surveying and assessment as part of arboriculture studies.