Multiple-use tradeoffs in Kaliwa Watershed, Luzon, Philippines
2006
Tomas, W.G.
The constraint method of the multiobjective linear programming (MOLP) model was used to allocate four production land uses that would maximize yield. The production land uses were agriculture, agroforestry, pasture, and fuelwood. The noninferior set estimation (NISE) algorithm in a MOLP Model determined the tradeoffs between the pasture and multistorey agroforestry. The selected tradeoff solutions in brushland and grassland increased the yield of the multistorey agroforestry to 90 tons at the expense of 38 a.u. livestock. Likewise, the area of the multistorey agroforestry increased from 31.6 ha to 108.8 ha, while that of pasture decreased from 325.9 ha to 248.7 ha. A total are of 26,863.8 ha was allocated to different land uses in the watershed. The natural/permanent and protection forests covered 63 percent (17,435.5 ha) of the total watershed area while the production land uses had a total area of 639.9 ha. The results of the study indicate that MOLP is an effective tool in making decisions. Although it allocated only a small portion of brushland and grassland to agriculture, agroforestry, pasture, and fuelwood land uses, these are already sufficient to satisfy the demand of the existing population within the watershed. The NISE algorithm, on the other hand, provided explicit tradeoffs between the pasture and multistorey agroforestry. The method encourages more flexible planning because it generated a range of possible solutions, which the watersheds users could chose.
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