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Projection of potential forest resources and wood removals use of NFI data and models at regional level A. Colin, C. Barnérias, N. Hamza, J.L. Cousin, M.D. Van Damme, S. Roger. Cirad – Montpellier – 28th June 2006 IFN - Nogent-sur-Vernisson - [email protected]

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Projection of potential forest resources and wood removals

use of NFI data and models at regional level

A. Colin, C. Barnérias, N. Hamza,

J.L. Cousin, M.D. Van Damme, S. Roger

Cirad – Montpellier – 28th June 2006

IFN - Nogent-sur-Vernisson - [email protected]


Projections of potential forest resources and wood removals

  • Context

  • Modernization of NFI tools and combination of 3 current applications :

    • Age classes (regular evenaged stands)

    • Diameter classes (all stand structures)

  • Development of a functional and modular tool (user-friendly, practical tool to discuss with local forest managers)

  • Project management : follow-up of processes, hypothesis and actions (traceability)

  • - Integration of the French NFI into the growth modeler community

    • easier use and access to NFI data : 270 000 inventory plots, 3 millions trees,

    • importation of external data (productivity),

    • exportation of results under a database format.

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Journée Capsis – 28th June 2006 – Cirad Montpellier


Projections of potential forest resources and wood removals

Objectives

- To forecast short and mid-term potential timber harvests (5-30 yrs)

- Geographic level : local, regional (natural, administrative), national

- A decision-making tool :

  • Strategies and actions to enhance timber harvests

  • Adequacy between forest resource & industrial investments

  • Follow-up of national forest policy (afforestation program, etc.)

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Journée Capsis – 28th June 2006 – Cirad Montpellier


Projections of potential forest resources and wood removals

- Building set of forest management units

- Modeling raw NFI data

1. Analysis of current forest resource

  • Analysis of removals in the past

  • - Comparing forest inventories

  • - Discussion with local managers

2. Definition of appropriate management practices

3. Calculation of potential forest resource and wood removals in the future

  • Tools (growth models)

  • - Results

A three steps process

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Journée Capsis – 28th June 2006 – Cirad Montpellier


Projections of potential forest resources and wood removals

Extérieur (ONF, CRPF, recherche)

Module facultatif

Module obligatoire

Comparaison d’inventaires

données d'entrée ou de sortie

Définition des scenarii sylvicoles

Hypothèses de croissance

Apports extérieurs

Base d’exploitation de l’IFN

Choix du simulateur

scenarii de gestion

scenarii de croissance

  • Simulations (& actualisation)

  • par classe d'âge

  • par classe de diamètre

  • - Disponibilités forestières brutes

  • - autres …

Données d’entrée des simulateurs

Constitution des DE et évaluation de leur pertinence statistique

Préparation des données par DE

Lissage

Caractérisation de la ressource à l'instant t

Extérieur (modèles de la recherche)

Saisie directe

Traitements dans Capsis

Extérieur (modèles de la recherche)

Saisie directe

Résultats, Précision

Service diagram

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Journée Capsis – 28th June 2006 – Cirad Montpellier


Projections of potential forest resources and wood removals

Compromise

homogeneity x detail x statistic accuracy

  • Constitutive criteria (play a role on management practices) :

  • - Geographic localization (department, NFI region)

    • - Ownership

    • - Stand structure

    • - Main tree species

    • - Other (accessibility, elevation, site, etc.)

Query on NFI databases

Building set of forest management units (DE)

Objective : To describe the regional forest resource for management purposes

Minimum 5000 ha

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Journée Capsis – 28th June 2006 – Cirad Montpellier


Projections of potential forest resources and wood removals

Compiled data, no more use for data at plot level

Assessment of the forest resource (raw NFI data)

Variables :

Growing stock, net increment, forest area, number of stems, basal area

Division criteria (NFI criteria) :

- region, ownership, stand structure, tree specie

- age classes,

- diameter classes (small, medium, large),

- slope and accessibility classes,

- cross sections (timber / industrial / fuel wood),

- others (to be define with local managers)

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Journée Capsis – 28th June 2006 – Cirad Montpellier


Projections of potential forest resources and wood removals

  • Raw NFI data (for every DE) :

  • growing stock, increment / classes (age or diameter)

  • « single-tree / distance-independent »

Operation :

“Smoothing” raw NFI data per ha

Objectives :

1. Prevent improbable data

2. One age – one data

Hypothesis :

Transversal approach : the values measured on several stands of different ages at the same date are applied to one stand growing from age t to age t+n

Preparation of input data for growth models


Projections of potential forest resources and wood removals

  • « Business as usual »

  • Intensified management practices

  • Others …

Private and public forest managers / other regional organizations / French NFI

Even aged high forest of maritime pine in private forest of Brittany

Definition of forest management practices

  • Control factors (for every DE) :

    • - Intensity of thinning (% growing stock, increment, number of stems),

    • - Area concerned by regeneration practices / clear cuts,

    • - Area of reforested & afforested lands,

    • - Management program complying ratio in private forests


Projections of potential forest resources and wood removals

Modeled NFI data

Iterative model for age classes distributions

Evenaged stands

One set of management units (DE)

Objectives :

- resource

- Wood removals


Projections of potential forest resources and wood removals

Iterative model for diameter classes distributions

Every kind of stand structures

Short and mid-term objectives :

- assessment of forest resource

- calculation of potential wood removals

Growth : shift in the number of stems from one diameter class to another, dynamic based on radial growth measured by NFI in the forest

Thinning : % number of stems / diameter classes (output of the comparing inventories process)

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Journée Capsis – 28th June 2006 – Cirad Montpellier


Projections of potential forest resources and wood removals

Edition of PDF reports (automation)

  • + additional calculations from the results

  • Economic balance

  • Fuel wood resource = wood removals – (timber + industrial round wood)

  • Carbon balance

  • Others …


Projections of potential forest resources and wood removals

Qualification of appropriate

management practices

Interactive mode

using Capsis

Shared Database

Web service based on Capsis batch mode

INTERNET

Software Architecture

 for one set of forest management units (DE)

 Generalisation for all set of forest management units (project)

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Journée Capsis – 28th June 2006 – Cirad Montpellier


Projections of potential forest resources and wood removals

References

2005

- IFN. J. Lenoir. Le Douglas en Normandie : estimation et valorisation de la ressource à partir des résultats du 3ième inventaire IFN. Rapport de fin d’étude FIF

- IFN. V. Morillon. Le Douglas en Limousin. Utilisation des résultats du 4ième inventaire IFN. Rapport de fin d’étude ENSTIB/ENGREF

2004

IFN / AFOCEL. Disponibilités en bois résineux en France, réévaluation après les tempêtes de décembre 1999

2003

IFN. Étude de la ressource forestière et des disponibilités en bois en Bretagne

2001

IFN / AFOCEL. Suivi de la ressource en pin maritime dans les Landes de Gascogne après la tempête de 1999

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Journée Capsis – 28th June 2006 – Cirad Montpellier


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