Usda forest Service National Biomass Estimator Library



Download 190.02 Kb.
Page1/4
Date conversion18.10.2016
Size190.02 Kb.
  1   2   3   4

USDA Forest Service

National Biomass Estimator Library

[Type the document subtitle]



Forest Management Service Center

2150 Centre Ave, Bldg A

Fort Collins, CO 80526

Wang, YingFang

5/15/2014



This document contains information for the National Biomass Estimator Library, user guide and installation instruction.


Contents


1.Introduction 3

2.Biomass Components and Their DLL Functions 3

3.NBEL Species Regional/Forest Default Setup 5

4.Install and User Guide for NBEL TesterSetup 8

5.Installation and User Guide for MS Excel Add-in Functions 11

6.Use NBEL DLL with Microsoft Visual Studio C# Project 12

7.References 12



  1. Introduction


The national Biomass Estimator Library (NBEL) was developed by the Forest Management Service Center (FMSC). The NBEL synthesizes published biomass equations in US and also unpublished equations developed by FMSC. This collection of biomass equations and their associated metadata are stored in a SQLite database. The NBEL also integrates with the National Volume Estimator Library (NVEL) and tree species specific gravity and other properties to convert cubic volume to biomass. The NBEL is written in C# and has a graphic user interface (GUI) to allow user to query/view equations, calculate dry and green biomass on selected equation, view regional/forest species default equation for each component, and also setup local defaults. The NBEL is packaged as a maintainable Dynamic Link Library (DLL). The DLL has a function for each biomass component. All DLL functions will only require input parameters of Region, Forest, District, Species, DBH and Height to calculate biomass. The DLL functions will automatically use species default equation for the region/forest. If there is no default setup, they will convert cubic volume to biomass with component ratio method.

The DLL is currently accessible via C# and MS Excel.


  1. Biomass Components and Their DLL Functions


From the collection of biomass studies, the biomass components and their DLL function are summarized in Table 1.

Table 1. List of biomass components and their DLL functions from NBEL

COMP_ID

COMP_DESC

DLL_FUNCTION

1

Complete tree (above + belowground)

bmCompleteTree

2

Whole tree (aboveground)

bmAboveGroundTotal

3

Whole tree (above stump)

bmAboveStumpTotal

4

Stem (wood only)

bmStemWood

5

Stem (bark only)

bmStemBark

6

Stem (wood + bark)

bmStemTotal

7

Stem top

bmStemTop

8

Branches live

bmBranchesLive

9

Branches live < 2.5 cm

bmBranchesLive_0_1

10

Branches live 2.5-7.6 cm

bmBranchesLive_1_3

11

Branches live > 7.6 cm

bmBranchesLive_3_plus

12

Branches dead

bmBranchesDead

13

Branches total (live + dead)

bmBranchesTotal

14

Stem + branches (bark only)

bmStemBranchesBarkOnly

15

Stem + branches (wood only)

bmStemBranchesWoodOnly

16

Stem + live branches

bmStemBranchesLive

17

Stem + total branches (live + dead; no twigs or foliage)

bmStemBranchesTotal

18

Foliage total

bmFoliageTotal

19

Foliage new

bmFoliageNew

20

Foliage old

bmFoliageOld

21

Twigs total

bmTwigsTotal

22

Twigs old

bmTwigsOld

23

Foliage + twigs

bmFoliageTwigs

24

Crown (branches + foliage + twigs)

bmCrown

25

Roots, coarse > 3 mm dia

bmRootsCoarse

26

Coarse stump roots

bmCoarseStumpRoots

27

Coarse lateral roots

bmCoarseLateralRoots

28

Fine roots

bmFineRoots

29

Roots total

bmRootsTotal

30

Stump wood

bmStumpWood

31

Stump bark

bmStumpBark

32

Stump total

bmStumpTotal

33

Stump + roots

bmStump_Roots

34

Cones

bmCones

35

Live crown (branches + foliage + twigs)

bmLiveCrown

36

Dead crown (branches + foliage + twigs)

bmDeadCrown

37

Small branches

bmSmallBranches

38

Merch stem (wood + bark) from stump to top dib

bmMerchStemTotal

39

Merch stem wood from stump to top dib

bmMerchStemWood

40

Merch stem bark from stump to top dib

bmMerchStemBark

41

Top (wood only) (from merch top to tip)

bmStemTopWood

42

Top (bark only) (from merch top to tip)

bmStemTopBark

45

Residue (stump + top limb)

bmResidue

46

Top limb (branches + tip)

bmTopLimb

47

Above stump wood and bark

bmAboveStumpWoodBark

48

Total wood and bark to min branches

bmTotalWoodBard_to_minBranch

1011

Branches live > 1 inch

bmBranchesLive_1_plus

To calculate biomass for a particular component, simply call its function with required input variables, such as for above ground total: bmAboveGroundTotal(Region, Forest, Dist, Species, DBH, Height). For example, if you want to calculate total above ground biomass for red maple (316) in region 9 Allegheny forest (19) and district 1 with DBH = 15 inch and Total height = 65 feet, you will use:

bmAboveGroundTotal(09, 19, 01, 316, 15, 65)

The library will first check if there are predefined defaults for red maple in region 9 and forest 19. The local default will take first priority, then forest and regional defaults. If there is a default equation, the biomass will be calculated using the default equation. Otherwise biomass will be calculated from stem cubic volume and use it with Component Ratio Method (CRM) (Heath 2009) to calculate dry biomass.


  1   2   3   4


The database is protected by copyright ©ininet.org 2016
send message

    Main page