A dynamic bio-economic model for analyzing deforestation and degradation: An application to woodlands in Uganda

被引:28
|
作者
Namaalwa, Justine [1 ]
Sankhayan, Prem L. [1 ]
Hofstad, Ole [1 ]
机构
[1] Norwegian Univ Life Sci, Dept Ecol & Nat Resource Management, UMB, N-1432 As, Norway
关键词
bio-economic model; woodlands; degradation; deforestation; policy regimes;
D O I
10.1016/j.forpol.2006.01.001
中图分类号
F [经济];
学科分类号
02 ;
摘要
This study is an effort at developing a dynamic non-linear programming bio-economic model capable of analyzing deforestation and degradation processes in the Ugandan woodlands. The model is unique in capturing the entire systems behavior affecting deforestation and degradation, approximated through changes in forest area and stand density. Thus the model incorporates biological factors, such as growth, the socio-economic factors and related interactions between them. A matrix growth sub-model for the woodlands, accounting for diameter increment, mortality, recruitment and harvest of trees, was imbedded in the overall model to account for the stock changes over the planning horizon. The socio-economic factors and relations affecting the woodland deforestation and degradation processes are addressed through incorporation of three sets of activities, namely, crop cultivation, livestock raising and wood harvesting for firewood and charcoal. Demand and supply relations for these activities are linked through behavioral, structural and accounting equations. The production, consumption, and sale decisions are assumed to be made simultaneously by the households. Though, the model can be successfully used at different levels and planning horizons, a village is the decision making unit over the period 2003-2020 for the purpose of this study. The net present value of cash flows is taken as a proxy measure for utility that is sought to be maximized under six alternate scenarios, including the base scenario. Under the base scenario, 46.7% woodland clearing for cultivation and 42.1% reduction in biomass density were observed over the model planning horizon. Under the scenarios with improved agricultural yields and increased charcoal prices and taxes, the clearing of available woodland was predicted at 98.3%. Biomass density was observed to decline by about 11.9% and 15.5% with the imposition of wood harvest and charcoal quotas. It was observed that none of the policy interventions in this study resulted in reduced degradation and deforestation, which posits a dilemma to the policy makers and implementers. However, we conclude that a well implemented system for taxes or quota restrictions would enhance sustainable resource use in the remaining woodland areas. These interventions are highly limited by implementation and enforcement problems that need to be properly addressed by policy makers and planners. (c) 2006 Elsevier B.V All rights reserved.
引用
收藏
页码:479 / 495
页数:17
相关论文
共 50 条
  • [1] A viability analysis for a bio-economic model
    Béné, C
    Doyen, L
    Gabay, D
    ECOLOGICAL ECONOMICS, 2001, 36 (03) : 385 - 396
  • [2] A bio-economic model for Namibian pilchard
    Sandal, LK
    Steinshamn, SI
    SOUTH AFRICAN JOURNAL OF ECONOMICS, 2001, 69 (02) : 299 - 318
  • [3] Analyzing diversification possibilities on specialized tobacco farms in Argentina using a bio-economic farm model
    Chavez, M. D.
    Berentsen, P. B. M.
    Lansink, A. G. J. M. Oude
    AGRICULTURAL SYSTEMS, 2014, 128 : 35 - 43
  • [4] Managing invasive plants on public conservation forestlands: Application of a bio-economic model
    Lee, Donna J.
    Adams, Damian C.
    Kim, C. S.
    FOREST POLICY AND ECONOMICS, 2009, 11 (04) : 237 - 243
  • [5] A dynamic bio-economic model for community management of goat and oak forests in Zagros, Iran
    Soltani, Arezoo
    Sankhayan, Prem L.
    Hofstad, Ole
    ECOLOGICAL ECONOMICS, 2014, 106 : 174 - 185
  • [6] A Regional Bio-economic Model of Nitrogen Use in Cropping
    Merel, Pierre
    Yi, Fujin
    Lee, Juhwan
    Six, Johan
    AMERICAN JOURNAL OF AGRICULTURAL ECONOMICS, 2014, 96 (01) : 67 - 91
  • [7] A bio-economic model for optimal harvest of timber and moose
    Wam, HK
    Hofstad, O
    Nævdal, E
    Sankhayan, P
    FOREST ECOLOGY AND MANAGEMENT, 2005, 206 (1-3) : 207 - 219
  • [8] A bio-economic feasibility model for remote setting in Virginia
    Congrove, Michael S.
    Allen, Standish K., Jr.
    Wesson, Jim
    JOURNAL OF SHELLFISH RESEARCH, 2008, 27 (04): : 998 - 998
  • [9] Analysis of Land Use Changes in Nigeria: With Application of Integrated Bio-economic Spatial Model
    Ajibefun, Igbekele A.
    SURVIVAL AND SUSTAINABILITY: ENVIRONMENTAL CONCERNS IN THE 21ST CENTURY, 2011, : 329 - 340
  • [10] Stochastic bio-economic model of bovine intramammary infection
    Halasa, T.
    Nielen, M.
    Huirne, R. B. M.
    Hogeveen, H.
    LIVESTOCK SCIENCE, 2009, 124 (1-3) : 295 - 305