P-Factors in Universal Soil Loss Equation (USLE) of Various Conservation Practices on Hillslope at Mae Sa Integrated Watershed and Forest Land-use Project, Changwat Chiang Mai

Authors

  • Nipon Tangtham Department of Conservation, Faculty of Forestry, Kasetsart University, Bangkok 10900, Thailand
  • Aphinan Korporn Watershed Conservation Division, Natural Resources Conservation Office, Royal Forest Department, Bangkok 10900, Thailand

Keywords:

universal soil loss equation, P-factor, conservation measures

Abstract

P-factor in the USLE, the ratio of soil loss between conservation meausures plot and up and down plowing plot, of 4 soil conservation measures namely bench terrace (BT), intermittent terrace (IT), hillside ditch (HD), and contour bund (CB) was determined based on soil loss during 1980 to 1990 observed from three replications of 5×20 meter runoff plots on 30% slopling area at Mae Sa Integrated Watershed and Forest Land-use Project, Chiang Mai. Results showed that P-factor for BT, IT, HD and CB was averaged at 0.128, 0.245, 0.299 and 0.214 respectively. The same pattern of erosion control efficiency was also derived when P-factor was determined based on soil loss per a unit of rainfall factor and on mm of water loss.

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Published

1998-03-31

How to Cite

Tangtham, Nipon, and Aphinan Korporn. 1998. “P-Factors in Universal Soil Loss Equation (USLE) of Various Conservation Practices on Hillslope at Mae Sa Integrated Watershed and Forest Land-Use Project, Changwat Chiang Mai”. Agriculture and Natural Resources 32 (1). Bangkok, Thailand:41-51. https://li01.tci-thaijo.org/index.php/anres/article/view/240554.

Issue

Vol. 32 No. 1 (1998): January-March

Section

Research Article

License

online 2452-316X print 2468-1458/Copyright © 2022. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/),
production and hosting by Kasetsart University of Research and Development Institute on behalf of Kasetsart University.