A systems model for the Magat watershed management project, Isabela, Philippines | |
| Author | Gelera, Samuel G. |
| Call Number | AIT Thesis no.AE-80-10 |
| Subject(s) | Watershed management--Philippine Islands--Magat River Soil conservation--Philippine Islands--Magat River |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | The attempt to formulate an optimal plan incorporating erosion control with the agro-forest production was based on the hypothesis that the watershed's capacity to adopt control strategies like terracing depends upon its financial as well as its resource characteristics. In this study, a linear programming based systems model was developed to aid planners in operating decisions in one of the biggest agricultural watersheds in the Philippines. The study is limited to four agro-forestry species devoted to thirty zones utilized. The objective of the systems model is to maximize the total net present worth of the species subject to land area restriction, capital constraint and under a permissible amount of sediment yield. The model produces two outputs namely: (i) the combination of the species to be planted in each zone (hectares) for the entire project life and the estimated total allowable erosion rate; (ii) the sensitivity analysis output for projecting the general behavior of the project's total net present worth and total allowable sediment yield for aiding future operating decisions and policies. The study included this sensitivity analysis to analyze the effect of changing the unit net present worth from each zone and by changing the erosion rate constraint at varying periods, and also because these para meters were based on the prediction of future conditions which inevitably introduces some degree of uncertainty. The results of the sensitivity analysis shows the projected total net present worth. It also illustrates the inequities involved to restrict erosion rate (soil loss) at various levels. Some zones will have to make major changes i.e., decrease in hectarage and suffer significant losses, while other zones can operate with little change or no loss at all in their net present worth value. |
| Year | 1980 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Olesen, Svend Elsnab |
| Examination Committee(s) | Tang, John C.S. ;Apichart Anukularmphai |
| Scholarship Donor(s) | Netherlands |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1980 |