Difference between revisions of "Hugin"

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== General System description ==
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System name: HUGIN
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===Brief description===
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HUGIN is a [[DSS]] used to derive the timber production possibilities at national and regional level for Sweden, associated to different forest management  strategies and environmental policies.
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[[Category:Decision support system]]
 
[[Category:Swedish DSS]]
 
[[Category:Swedish DSS]]
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__TOC__
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=== Scope of the system ===
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HUGIN is based on the Swedish National Forest Inventory. Together with individual tree growth prognosis and a management programme, the forecasts for both the state of the forest, growth and potential cutting level are made.
 +
 +
=== System origin ===
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* HUGIN's development started in the late 70's
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* Despite being an old DSS, it is still in use<ref>ANDERSSON, M., B. DAHLIN et M. MOSSBERG (2005): The Forest Time Machine — a multi-purpose forest management decision-support system. ''Computers and Electronics in Agriculture'', 49, 114–128.</ref>. It has been used for two forest harvest projections for the whole Sweden. Also, it has been used by large forest companies to make harvest projections and to calculate the supply of biomass for fuel in order to allocate heating plants.
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=== Support for specific issues  ===
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It can study the consequences of different management regimes with regard to the output of timber and forest fuels, and issues like carbon sequestration in forests<ref>BÅÅTH, H., A. GÄLLERSPÅNG, G. HALLSBY, A. LUNDSTRÖM, P. LÖFGREN, M. NILSSON et G. STÅHL (2002): Remote sensing, field survey, and long-term forecasting: an efficient combination for local assessments of forest fuels. ''Biomass and Bioenergy'', 22, 145-157.</ref>.
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=== Support for specific thematic areas of a problem type  ===
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* Silvicultural
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* Certification
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* Conservation
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* Restoration
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* Transportation
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* Development choices / land use zoning
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* Policy/intervention alternatives
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=== Related systems  ===
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* [[FMPP]]
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* [[Heureka]]
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== Data and data models ==
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=== Typical spatial extent of application  ===
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HUGIN system aims to make forecasts at the regional and national scale of the forest.
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=== Forest data input  ===
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The input data unit is the individual tree. Data for the HUGIN system are tree, stand and site variables from the sample plots of the Swedish National Forest Inventory (NFI), including ownership and geographic variables.
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== Models ==
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=== Forest models ===
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Growth is calculated at the individual tree level. Management is assigned to a certain share of the sample plots, according to priority rules based on what is considered to be good management, but some of them, a small number, are selected more or less random.
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HUGIN also contains total tree biomass functions (for Swedish conditions) with which the total forest biomass development over time can be studied.
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== Decision Support ==
 +
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=== Definition of management interventions ===
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The following treatments can be studied using the HUGIN system:
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* regeneration methods (planting, sowing, natural regeneration),
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* pre-commercial thinning,
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* fertilisation,
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* final felling,
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* drainage of peatland, and
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* thinning (weight, species, diameter distribution).
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=== Typical temporal scale of application ===
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Strategic level. Growth is calculated on five year periods, but the results are presented over 10-year periods. Projections are usually done over 100 years.
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=== Types of decisions supported  ===
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*Management level
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**strategic decisions
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**administrative decisions
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* Management function
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* planning decisions
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**organizing decisions
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*decision making situation
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**unilateral
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**collegial
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**Bargaining / participative decision making
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=== Decision-making processes and models ===
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HUGIN is a deterministic simulation model, though containing some stochastic elements. No optimization is used.
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== Output ==
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=== Types of  outputs ===
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Result consists of standard tables that present each 10 years the state of the forest, harvested volume (both over bark and solid), growth and mortality by tree species, clear-cut area, composition of fellings, and timber quality.
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=== Spatial analysis capabilities  ===
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Some adjacency constraints can be taken into account. For example, plots close to roads, lakes or houses can be given a special treatment.
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 +
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== System ==
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=== System requirements  ===
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* Operating Systems: VAX-VMS, UNIX
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=== Architecture and major DSS components ===
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HUGIN was developed in FORTRAN programming language, It is compatible with MIMER, EXCEL and INGRESS.
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=== Usage ===
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It has been used for state forests, by forest companies, national and local Boards of Forestry, various organizations, and researchers.
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=== User interface ===
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Although being handled by only a few persons in the department, the system is rather user-friendly.
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==References==
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===Cited references===
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<references/>
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===External resources===
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* NABUURS G.J. et R. PÄIVINEN (1996): ''Large Scale Forestry Scenario Models - a compilation and review''. European Forest Institute Working Paper No. 10. Joensuu, Finland.

Latest revision as of 07:03, 14 October 2012

General System description

System name: HUGIN

Brief description

HUGIN is a DSS used to derive the timber production possibilities at national and regional level for Sweden, associated to different forest management strategies and environmental policies.

Scope of the system

HUGIN is based on the Swedish National Forest Inventory. Together with individual tree growth prognosis and a management programme, the forecasts for both the state of the forest, growth and potential cutting level are made.

System origin

  • HUGIN's development started in the late 70's
  • Despite being an old DSS, it is still in use[1]. It has been used for two forest harvest projections for the whole Sweden. Also, it has been used by large forest companies to make harvest projections and to calculate the supply of biomass for fuel in order to allocate heating plants.

Support for specific issues

It can study the consequences of different management regimes with regard to the output of timber and forest fuels, and issues like carbon sequestration in forests[2].

Support for specific thematic areas of a problem type

  • Silvicultural
  • Certification
  • Conservation
  • Restoration
  • Transportation
  • Development choices / land use zoning
  • Policy/intervention alternatives

Related systems


Data and data models

Typical spatial extent of application

HUGIN system aims to make forecasts at the regional and national scale of the forest.

Forest data input

The input data unit is the individual tree. Data for the HUGIN system are tree, stand and site variables from the sample plots of the Swedish National Forest Inventory (NFI), including ownership and geographic variables.


Models

Forest models

Growth is calculated at the individual tree level. Management is assigned to a certain share of the sample plots, according to priority rules based on what is considered to be good management, but some of them, a small number, are selected more or less random.

HUGIN also contains total tree biomass functions (for Swedish conditions) with which the total forest biomass development over time can be studied.


Decision Support

Definition of management interventions

The following treatments can be studied using the HUGIN system:

  • regeneration methods (planting, sowing, natural regeneration),
  • pre-commercial thinning,
  • fertilisation,
  • final felling,
  • drainage of peatland, and
  • thinning (weight, species, diameter distribution).

Typical temporal scale of application

Strategic level. Growth is calculated on five year periods, but the results are presented over 10-year periods. Projections are usually done over 100 years.

Types of decisions supported

  • Management level
    • strategic decisions
    • administrative decisions
  • Management function
  • planning decisions
    • organizing decisions
  • decision making situation
    • unilateral
    • collegial
    • Bargaining / participative decision making

Decision-making processes and models

HUGIN is a deterministic simulation model, though containing some stochastic elements. No optimization is used.


Output

Types of outputs

Result consists of standard tables that present each 10 years the state of the forest, harvested volume (both over bark and solid), growth and mortality by tree species, clear-cut area, composition of fellings, and timber quality.

Spatial analysis capabilities

Some adjacency constraints can be taken into account. For example, plots close to roads, lakes or houses can be given a special treatment.


System

System requirements

  • Operating Systems: VAX-VMS, UNIX

Architecture and major DSS components

HUGIN was developed in FORTRAN programming language, It is compatible with MIMER, EXCEL and INGRESS.

Usage

It has been used for state forests, by forest companies, national and local Boards of Forestry, various organizations, and researchers.

User interface

Although being handled by only a few persons in the department, the system is rather user-friendly.


References

Cited references

  1. ↑ ANDERSSON, M., B. DAHLIN et M. MOSSBERG (2005): The Forest Time Machine — a multi-purpose forest management decision-support system. Computers and Electronics in Agriculture, 49, 114–128.
  2. ↑ BÅÅTH, H., A. GÄLLERSPÅNG, G. HALLSBY, A. LUNDSTRÖM, P. LÖFGREN, M. NILSSON et G. STÅHL (2002): Remote sensing, field survey, and long-term forecasting: an efficient combination for local assessments of forest fuels. Biomass and Bioenergy, 22, 145-157.


External resources

  • NABUURS G.J. et R. PÄIVINEN (1996): Large Scale Forestry Scenario Models - a compilation and review. European Forest Institute Working Paper No. 10. Joensuu, Finland.
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