University of Twente Student Theses


Modeling Forest Stand Parameters and Carbon Sequestration of Pine and Eucalyptus Plantations in Tunari National Park in Cochabamba, Bolivia

Gossweiler Herrera, Benjamin (2010) Modeling Forest Stand Parameters and Carbon Sequestration of Pine and Eucalyptus Plantations in Tunari National Park in Cochabamba, Bolivia.

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Abstract:An accounting system is needed for the carbon sequestration in pine and eucalyptus plantations in Tunari National Park in Cochabamba, Bolivia as an accepted mechanism for reducing atmospheric CO2 levels and to understanding the current status of the global carbon cycle and to quantify carbon sources and sinks associated with the current status of these plantations in the park. Although it is impossible to measure this in spatial and temporal scope directly, the 3-PG model was proposed to be used to measure the average diameter at breast height (DBH), Height, biomass production and finally the carbon sequestration as an expression of Net Primary Production. Tunari National Park is situated 4 km. to the west of the Cochabamba District. Its altitude range varies between 2,200 and 4,400 meters / 7,218 to 14,436 the park occupies the Mesothermal Dry Valley region and the mountain ranges of the Tunari, thus constituting an ecosystem with diverse inhabited regions. Its characteristics pertain to the mountain range regions and inter-Andean valleys. The 3-PG model in stand and spatial level, was chosen because it is relatively simple to run, is freely available, has a reasonable requirements of parameters values and the most important reason is because the parameters specie-specific were already defined, calibrated and tested for different Pine and Eucalyptus species including those planted in the park. Other important reason were that the model has a consist structure, dynamic regulation of carbon allocation, sensitivity to environmental factors and site management practices. The model was run for 8 pine stands at 39, 38, 34, 32, 25, 24, 23 and 18 years and 6 eucalyptus stands at 36, 35, 32, 28, 25 and 23 years old. The model efficiency showed a reasonable fit of the 3-pg model of average DBH for pine stands at 23 and 18 years old and a fair fit for eucalyptus stands at 28 and 32 years old. The height variable was reasonable simulated for only for eucalyptus stands at 32 and 28 years old. The aboveground biomass estimation for pine stands was very reasonable for the stand at 23 years old and not better than the average of the field measurements at 18 years old stand. In eucalyptus stands, all the simulations for aboveground biomass were not fitted with the field measurements due to negative values of model efficiency statistic. The amount of carbon sequestration is decreasing as the age is increasing in both studied cases. The spatial distribution of carbon sequestration shows a north to south pattern of increasing values.
Item Type:Essay (Master)
Faculty:ITC: Faculty of Geo-information Science and Earth Observation
Programme:Geoinformation Science and Earth Observation MSc (75014)
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