Biomass Model Manager

Functional Overview

Biomass refers to the total dry weight of organic matter per unit area at a certain moment in ecology. It is usually expressed in kilograms per square meter (kg/㎡) or tons per hectare (t/h㎡). The usual method for measuring biomass is to harvest all the materials within a unit area and then dry and weigh each part separately. For carbon storage statistics, the parts that need to be harvested include aboveground parts (trunk, leaves, flowers) and belowground parts (soil, dead wood, litter, etc.). In actual operation, it is difficult to calculate underground biomass and harvesting samples requires a lot of work and can cause serious environmental damage. Therefore, regression formulas are usually used to calculate the total biomass within a unit area sample statistically. Then forest-scale biomass can be obtained by multiplying with forest area. Considering that different tree species have different growth curves due to differences in light exposure and humidity they receive; therefore different biomass inversion models must be constructed for different tree species using basic parameters such as tree height (H) and diameter at breast height(D). Researchers have done extensive research on formulae for biomass models of different species mostly based on H & D as basic inversion parameters. This function supports inputting/deleting/querying/modifying dozens of tree species models based on China's forestry industry standard.

Usage

Click Ground-based Forestry > Forest Biomass Model Management.

Parameters Settings

• Import: You can import custom database files which should only come from exported biomodel database files via this function.
• Export: Export data as database file.
• Define Tree Species: Open custom tree species function. This function can input custom tree species models into the database.
• Species Name: Enter a custom tree species name that cannot be duplicated with other tree species names in the database.
• Locations: Each tree species can support multiple regions to enter different biomass models for each region. Click on the add button on the right to add a region and corresponding biomass model.
• Locations (required): Enter the region name.
• Result Type (required): Enter target parameters, including AGB (aboveground biomass), UGB (belowground biomass), BCF (biomass conversion factor), V(volume) etc.
• Model Type(required): Support univariate and bivariate models. Univariate model only contains D while bivariate model contains both D and H. The formula will change according to different selected model types.
• Select Formulas(required): Select calculation formulae. Currently, only two bivariate formulas and one univariate formula are supported.
• Formula Parameters(required): Depending on which formula is selected, the number of formula parameters may vary but no more than three at most.
• Formula Range(optional)：Since trees accumulate biomass at different rates during different growth periods, it may be necessary to segmentize height of trunk for biomodels processing such as treating trunks below 5cm diameter separately.

-Model Management: After entering all biometric formulas, you can view and manage them in Model Management interface by clicking on each individual tree species or its respective regions where all supported formulas are displayed along with detailed information about each type of publicized data including their types, parameters,result types,and applicable ranges.

@inproceedings{ LY/T 2654-2016 LY/T 2657-2016 LY/T 2659-2016 LY/T 2656-2016 LY/T 2661-2016 }