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CABI Book Chapter

Land use change in tropical watersheds: evidence, causes and remedies.

Book cover for Land use change in tropical watersheds: evidence, causes and remedies.

Description

This book studies land use change in tropical landscapes, with particular emphasis on the economic processes that influence rates of land degradation and forest clearing. Multidisciplinary contributions draw lessons from data collected between 1992 and 2004 in the Manupali watershed in southern Philippines. Through this detailed case study, the book documents forces leading to land use changes, in...

Metrics

Chapter 10 (Page no: 147)

Linking economic policies and environmental outcomes at a watershed scale.

This chapter reports the results from an optimization-simulation model used to illustrate the potential impacts of local and national policies to encourage sustainable land use. The empirical focus is on the Manupali watershed in the Philippines. Simulation results indicate that restrictions on vegetable growing in the study area reduce farm- and area-weighted income levels by approximately 15% over 10 years, and reduce downstream loads by up to 37% from base levels. Soil conservation, combined with a lump sum transfer payment, is somewhat more effective in reducing erosion and associated agricultural externalities, but at a cost to the government of approximately 391 pesos/ha per year. Simulation results suggest that a 20% tax on vegetable production is insufficient to dramatically alter land use patterns. Households shift land use somewhat to avoid taxes, leading to modest reductions in agricultural externalities. Combining the tax with a subsidy to soil conservation provides stronger environmental benefits, but reduces household welfare. In general, the study finds that economy-environment trade-offs are difficult to avoid.

Other chapters from this book

Chapter: 1 (Page no: 1) Economic development and watershed degradation. Author(s): Coxhead, I. Shively, G.
Chapter: 2 (Page no: 19) Agricultural development and institutional transitions. Author(s): Rola, A. C. Coxhead, I.
Chapter: 3 (Page no: 37) Water quality changes in the Manupali River Watershed: evidence from a community-based water monitoring project. Author(s): Deutsch, W. G. Orprecio, J. L.
Chapter: 4 (Page no: 58) How do national markets and price policies affect land use at the forest margin? Evidence from the Philippines. Author(s): Coxhead, I. Rola, A. C. Kim, K.
Chapter: 5 (Page no: 78) How do relative price changes alter land use decisions? Panel data evidence from the Manupali watershed, Philippines. Author(s): Coxhead, I. Demeke, B.
Chapter: 6 (Page no: 90) Economic incentives and agricultural outcomes in upland settings. Author(s): Coxhead, I. Shively, G.
Chapter: 7 (Page no: 109) Simulating soil erosion and sediment yield in small upland watersheds using the WEPP model. Author(s): Ella, V. B.
Chapter: 8 (Page no: 126) Identifying soil erosion hotspots in the Manupali River Watershed. Author(s): Paningbatan, E. P., Jr.
Chapter: 9 (Page no: 133) Alternatives to traditional annual crop agriculture in the uplands - biophysical evidence from the Manupali River Watershed. Author(s): Midmore, D. J. Poudel, D. D. Nissen, T. M. DaƱo, A. Zhu, G.
Chapter: 11 (Page no: 163) Using payments for environmental services (PES) to assist in watershed management. Author(s): Pagiola, S. Angeles, M. delos Shively, G.
Chapter: 12 (Page no: 176) Conclusions and some directions for future research. Author(s): Coxhead, I. Rola, A. C. Shively, G.

Chapter details

  • Author Affiliation
  • Department of Agricultural Economics, Purdue University, 403 West State Street, West Lafayette, IN 47907, USA.
  • Year of Publication
  • 2005
  • ISBN
  • 9780851999128
  • Record Number
  • 20063019180