Arboricultural Consultant

P.G. Biddle

Dr P.G. Biddle, O.B.E., M.A., D.Phil., F.Arbor.A.
Registered Consultant of the Arboricultural Association
Honorary Fellow, Insitute of Chartered Foresters

Chapter 9. Comparative Effects of Different Species, and of Individual Trees and Groups

  Phenotypic variation
  Intra-specific variation
  Is inter-specific variation to be expected?
  Criteria for comparing effect of different
  species on soil and buildings
  Rank order based on radial spread of roots
  Rank order based on propensity to cause
  damage
  Rank order based on 'water demand'
  Stock / scion interaction
  The effects of rows and groups of trees
  Shrubs
  Summary

Chapter 10. Other Forms of Damage by Tree
  Roots
  Causes of Damage
  Objectives of investigation
  Scope of investigations
  The role of monitoring
  Cost effectiveness of investigation
  Reviewing the results of investigations
  Summary

Chapter 11. Strategy for Investigating Damage
  Causes of Damage
  Objectives of investigation
  Scope of investigations
  The role of monitoring
  Cost effectiveness of investigation
  Reviewing the results of investigations
  Summary

Chapter 12. Site Investigations I) The Building
  Objectives
  History of site
  Analysis of damage to the building
  History of damage
  Recording of cracks
  Severity of damage
  Measurement of the distortion of the building
  Methods of measuring levels:
  i) Water level
  ii) Optic level
  Levelling staff
  Presentation of level results
  Interpretation of level surveys
  Verticality survey
  Foundation depth and construction
  Foundation load
  Drain and services survey
  Summary