#TITLE_ALTERNATIVE#

• Main Author: KUSTIWA ( NIM. 25114003 ), EKUS
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/21910
• Institution: Institut Teknologi Bandung

Information about the tree biomass is needed to describe the condition of forest ecosystems in order to mitigate global climate change. Determination of tree biomass of above ground level can use the equation of tree Biomass Expansion Factor (BEF). An important parameter is clear bole volume (VBC). The weakness of tree form factor method has been used for the determination of the volume of trees in National Forest Inventory (IHN) still produces a relatively large bias about 17% to 25%. Terrestrial Laser Scanner (TLS) as the three dimensional ground laser could potentially provide information from the trees with a high spatial resolution, are expected to provide information about the dimension and the structure of a tree in a comprehensive and a more accurate manner. The purpose of this research is to know the accuracy and efficiency of the time use of TLS to specify the VBC in order to estimate tree biomass at Taman Hutan Raya Ir.H. Djuanda, Bandung. The research on tree biomass estimation is carried out by using an indirect approach based on equation of BEF tree. The volume of free tree branches as the important parameters of tree biomass, is estimated by the method without direct contact (indirect non-contact method) in a non-destructive use of TLS. The research results showed the VBC that were produced using the TLS range between 107.426 m3/ha up to 213.070 m3/ha. The value of accuracy in the form of the root mean square error (RMSE) and mean bias error (, MBE,) as a comparison between the results of the VBC TLS with the actual standing VBC (validator) is 0.039 m3 (8,62%) and -0.001 (-0.11%). At a confidence level of 95%, the median interval estimation errors of determination of VBC using TLS ranges between-2.04% to 2.61%. TLS method has better accuracy than tree form factor method of about 14.39% to 22,96%. The time required to perform data acquisition TLS per swath of 20 x 20 meters range between 4 hours 38 minutes up to 6 hours with a mean duration of 5 hours 20 minutes. Data acquisition using TLS takes faster, about 39 minutes, than a standard time dimension tree field data capture on IHN activities i.e. 0.75 day (6 hours). TLS method with accuracy 3%, worth considering an alternative method of determining the VBC. Estimation of tree biomass per hectare using TLS with tree BEF equation about 113.163 tons/ha with accuracy about 6,581 tons/ha.