A decision methodology for the resource utilization of rangeland watersheds
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azu_td_hy_e9791_1986_585_sip1_w.pdf
Author
Khalili, DavarIssue Date
1986Keywords
Hydrology.Arid regions ecology -- Southwest, New -- Simulation methods.
Watershed management -- Southwest, New -- Simulation methods.
Rangelands -- Southwest, New -- Simulation methods.
Committee Chair
Fogel, Martin
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The University of Arizona.Rights
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.Abstract
Degradation of rangeland resources leading to the desertification process is viewed in terms of human and climatic influences. While climatic impacts are important, resource utilization as practiced by man is the major cause of desertification. A multi-objective .decision methodology is developed here which is intended for the analysis of alternative management plans of rangeland watersheds under climatic variability. First, a system model is employed to portray the dynamics of a rangeland as it would respond to climatic changes and different grazing intensities. This approach allows for an interaction of inputs such as rainfall, solar radiation, and temperature with the state of the system which is a range condition index, and with outputs such as production and sediment yield. A simulation package is developed to implement the system model by actually using available data and providing some output values for production and sediment yield. At this stage a number of alternative management plans are identified. The information obtained from the simulation as well as other information of interest are represented by performance criteria, leading to an array of alternative versus criteria. Then, management plans need to be evaluated as they would impact the criteria. A multiobjective decision making technique is selected to perform the analysis for an identification of prefered management alternatives.Type
Dissertation-Reproduction (electronic)text
Degree Name
Ph. D.Degree Level
doctoralDegree Program
Renewable Natural ResourcesGraduate College