ICOS Science Conference, Session 5

1. Terrestrial laser scanning:
The future of forest
monitoring in ICOS?
Miro Demol, Bert Gielen, Kim Calders, Hans Verbeeck

2. 2
Forest mensuration
Measure ‘accessible’ tree parts
Diameters, tree height, no. of trees
Relate to properties that are difficult to measure:
Tree volume, mass
Calibrate

3. 3
Cutting trees?

4. 4
Terrestrial laser scanning: principles
Point
cloud
Cylinder
model
4

5. 5
DE-Hohes Holz
TLS in ICOS?
• Non-destructive: “weighing trees with lasers”
• Extremely rich datasets
• Novel and objective forest structure measurements
• Improved accuracy for estimating aboveground carbon (???)

6. 6
A validation experiment in Belgium
5 sites
4 species
Hard + softwoods
61 trees

7. 7
Tree height
(pine#1: -1%)
(pine#2: -0.5%)
(larch: +1.1%)
(beech: 0.8%)
(ash: 2.6%)

8. 8
Tree diameter
(pine#1: -6%)
(pine#2: -2.6%)
(larch: -4.2%)
(beech: -0.5%)
(ash: -2.6%)

9. 9
Standing volume
(pine#1: 4.5%)
(pine#2: 10%)
(larch: 103%)
(beech: 21%)
(ash: 32%)
(pine#1: -27%)
(pine#2: -18%)
(larch: -25%)
(beech: -11%)
(ash: -14%)

10. Solid wood volume

11. 11
Branch radius validation

12. 12
Wood density as conversion factor

13. 13
Baseline scanning at ICOS
Hyytiälä
Svartberget
Norunda
Hyltemossa
Fontainebleau
Hohes Holz

14. 14
Not covered in this presentation
(but useful for your research?)
ESA BIOMASS
Plant area index
Spaceborne AGB
mapping: TLS
validation?

15. 15

16. S
16
Credit: Shaun Levick, CSIRO

17. • Miro Demol
miro.demol@uantwerpen.be
@mirodemol
• dr. Bert Gielen
bert.gielen@uantwerpen.be
• Prof. Hans Verbeeck
hans.verbeeck@ugent.be
17
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