Recommendations concerning inventory of timber, fuelwood, and nontimber products and charcoal species regeneration



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USDA Forest Service Technical Assistance Mission

to the Republic of Senegal

Projet Agriculture/Gestion des Ressources Naturelles

March 3 - 16, 2007


RECOMMENDATIONS CONCERNING

INVENTORY OF TIMBER, FUELWOOD, AND NONTIMBER PRODUCTS AND CHARCOAL SPECIES REGENERATION

for Areas of Wula Nafaa Intervention in Eastern and Southern Senegal

June 2007





Jim Alegria

Biometrician BLM/FS
Vegetation Inventory


Cecilia Polansky

Participatory Inventory Consultant Senegal

This document does not necessarily reflect the views of the staff of Wula Nafaa nor those of the United States Agency for International Development.



RECOMMENDATIONS CONCERNING INVENTORY OF TIMBER, FUELWOOD, AND NONTIMBER PRODUCTS AND CHARCOAL SPECIES REGENERATION

for Areas of Wula Nafaa Intervention in Eastern and Southern Senegal


Table of Contents

SUMMARY 1

CONTEXT OF THIS TECHNICAL ASSISTANCE MISSION 1

FOREST INVENTORY PROCEDURES AND MAPS USED IN THE FOREST MANAGEMENT PLANS (PAFs) 2

DESCRIPTION OF THE SYSTEM IN USE 2



Overview of the “Système d’Information Ecologique, Forestière, et Pastorale” (SIEF) 2

Description of the SIEF inventory protocol 2

Plot execution in the field 6

Development of the volume regression equations 6

Establishment of permanent growth plots and research parcels 6

The method of incorporating SIEF data into PAFs 7

RECOMMENDED MODIFICATIONS TO THE INVENTORY AND MAPPING SYSTEM FOR THE PAFs 9



Making proper use of the SIEF software 9

Using the SIEF in new forests or in plantations 10

Potential changes to plot design 10

Include traditional volume units in the PAF 10

Include SIEF nontimber product species outputs in the PAF 11

Include SIEF regeneration outputs in the PAF 11

Development of a future Wula Nafaa – PROGEDE Relationship 12

ADDITIONAL RECOMMENDATIONS FOR MAKING THE INVENTORY PROCESS MORE PARTICIPATORY 13



Plotwork with communities 13

Forest division into blocks and parcels 14

Senegalese Forest Service participation 14

CHARCOAL - RELATED QUESTIONS 15

VALIDATION OF THE LENGTH OF CUTTING CYCLE /REGENERATION TIME FOR CHARCOAL SPECIES 15



The cutting protocol currently in use 15

A proposal to adjust the cutting protocol 15

Regeneration time and cutting protocols found in the literature 16

RECOMMENDATIONS FOR DETERMINING GROWTH RATES 17



Permanent plot remeasurement 17

Re-visiting previously cut areas 17

Counting tree rings 17

Analysis of growth data 18

Other unanswered questions 19

VALIDATION OF THE USE OF DIFFERENT VARIABLES BY THE SENEGALESE FOREST SERVICE IN CALCULATIONS FOR CHARCOAL TAX AND QUOTA PURPOSES 19



Sacks of charcoal in a meule, in a truck, or on a hectare 19

Example of conversion factors used with SIEF output and annual quota 20

Example of conversion factors used with PAF and area of production 21

Productivity of Casamance kiln versus traditional meule 21

Measurement of volume in a meule 21

1. Fasten a stick vertically to the air vent or chimney located at the very top of the meule (Figure 10). 22

2. Use a tape from the vertical stick and measure out to a set distance on the ground. Slope distance is OK. Mark the same distance in each cardinal direction. Experiment on a distance that would be convenient. Set a tripod at one of these spots. 22

3. Measure the distance to the meule at regular angles moving up the slope of the meule with the laser inclinometer. Record both the angle and the distance to the base of the meule as well as the distance to each point along the side of the meule (Figure 11). 22

4. Repeat at each cardinal direction but be sure that the tripod is exactly the same distance from the center stick. 22

INVENTORY AND PRODUCTIVITY OF SELECTED NONTIMBER FOREST PRODUCTS 23

Recommendation for Inventory and estimation of productivity of the Mbepp Gum Tree (Sterculia setigera) 23

How to inventory the Baobab and estimate its productivity 24

If aerial photographs are available 24

If there are no photographs of the area , or baobab parks cannot be identified reasonably well on the photography 26

How to inventory Madd fruit vines and estimate productivity 27



Assuming that riparian zones or intermittently wet areas can be identified reasonably well on the photography 28

Literature Cited 29

Appendix A: SIEF-generated stem tables for non-wood product trees 30

Appendix B. Steps to incorporate data from PROGEDE’S SIEF National inventory into forest management plans and maps 32

Sum lengths of watercourses, roads 34

Calc area of mares 34

Sum polygon areas by Yangambi stratum, convert to hectares 34

Sum polygon areas by Series, in ha 34

Write down values for each of the 5 strata in the Série Production. 35

NOTE: When you choose the Param. Dendro option, ERROR CALCS ARE PROVIDED based on all plots within the forest within stratum. (SEE OBSERVATION) 35

Add totals recorded in step 8 to appropriate columns 36

Delete fields Buffer, ID_, Area_, Perimeter_, PRCNT_Tot; 36

Add fields V/BE/BED/MP_NHA, V/BE/BED/MG_VolHA, M_VHA 36

Results desired: 2 tables of Espèces - totals (distributions of stems and volumes), by utilization and diam class 37

Line headings: Codetarif.Famille 37

Column headings: CodeUtil 37

Sum Column 2 37

Add a column before species code: Total stems in one species/ total of all species (format: integers) 37

Add row that sums by diam class 37

Add row below this for % represent. 37

Bring in species names from Access table Code ClDiam; transpose to match format. 37

If All species’ biomass is needed, then intersect GrilleS in step 9 with Foret.shp instead of with S_Prod.shp; use same block boundaries as in this step; clip OcSol by Block themes one by one -- manual pg 71 38

Combine files from this grouping by aggregating based on (parcel no. field); sum the other fields. 39

Result: ParcelNo. = heading, underneath are sum_V_NHA etc 39

Change names to be more descriptive (manual pg 77) 39

Add field EXP to refer to year of exploitation to be assigned on map 39

Appendix C. Calculations of proportions of wood volume in fagots 40

Appendix D. Charcoal variables and conversions used in Senegal and the Sahel 41

Appendix E. Species information from SIEF tables 44

ANNEX: REFERENCES FOR A POTENTIAL STUDY COMPARING YIELDS OF THE CASAMANCE KILN VERSUS TRADITIONAL KILN 48



RECOMMENDATIONS CONCERNING INVENTORY OF TIMBER, FUELWOOD, AND NONTIMBER PRODUCTS AND CHARCOAL SPECIES REGENERATION in Eastern and Southern Senegal

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