3.2.1 Remote Sensing Data
The multispectral satellite image data that will be used in this research is QuickBird satellite image.
Table 3.1 Acquisition Date of QuickBird Satellite Image. Image
Date
QuickBird April,15
th
2004
3.2.2 Field Measurement Data
The main measurement data derived from field are LAI Leaf Area Index, plant height, diameter breast height, and plant density. LAI data from field
is important to relate and obtain the equation with vegetation index value with another parameter. Plant height data is not only useful to derive the height
equation with LAI in the field, but also to determine the dry weight that reflects the above ground biomass. Plant density is used for calculating the dry weight that
reflects the above ground biomass in hectare. The selection of these trees in multi-species forest poses a challenging
sampling design. The selected trees must come from the population of interest, represent the major species in the forest and represent all size classes Brown,
1997.
3.3 Method
This research was conducted by using the fourth approach as mentioned in literature of estimating the biomass that combines field studies forest inventory
data, analysis of multispectral satellite imagery, allometric equation and statistical analysis. The general procedures are described in Figure 3.2.
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Figure 3.2 General procedure of biomass and carbon stock estimation.
3.4 Forest Cover Type Classification
Forest cover type classification is useful for analyzing the biomass per pixel in each different cover type. The habitat description as defined by STORMA
by workshops of 1-9 September 2003 consist of 6 type, these are: Habitat type A, B, C, D, E and F D, E and F included in D as agro forestry system.
1. Habitat type A: Natural forest with traditional use rattan extraction but
without timber extraction; closed canopy. 2.
Habitat type B: Natural with minor extraction of small trees used to build small pondoks not affecting the closure of the upper canopy layer.
3. Habitat type C: Natural forest with major timber extraction indicated by large,
artificial gaps in and pronounced decrease of the canopy cover to only 40- 60.
4. Habitat type D: Agro-forestry system dominated by cacao with remaining
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natural forest trees as shade trees. Canopy closure: 20-50. Low intensity management.
5. Habitat type E: Agro-forestry system dominated by cacao shaded by diverse
spectrum of planted trees and trees naturally grown after clear cutting. 6.
Habitat type F: Agro-forestry system with a shade tree layer dominated by one tree species Erythrina90 of all shade trees belong to one tree species.
Canopy closure: 20-50 [Note: the intensity of the agro forestry management not really differs between
habitat types D, E and F. in all types crops are more or less planted in rows] The classifications for each cover type by Supervised Classification
Maximum Likelihood using region or training sample set of plot observation. It based on the different spectral value in each observation plot refer to QuickBird
Image Figure 3.3.
Figure 3.3 Forest covers type classification procedure.
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3.5 Vegetation Index
Kategori