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Spatial optimization of soil and water conservation practices using coupled SWAT model and evolutionary algorithm

International Soil and Water Conservation Research 2021年第4期9卷 566-577页

作者： Farzaeh Naseri mahmood azari Mohammad Taghi Dastorani Department of Range and Watershed Management College of Natural Resources and EnvironmentFerdowsi University of Mashhad(FUM)MashhadKhorasan RazaviIran

Soil and water conservation practices have been extensively used in effective watershed *** impact of each conservation practice is site specific and dependent on the implementation site in the *** order to select cost effective placement of conservation practices with high impact,a large number of spatial combinations is needed to be *** this study,an optimization model framework is presented to find cost effective solutions for sediment yield and runoff control in the Fariman dam watershed in the Northeast of *** was accomplished by integrating soil and water assessment tool(SWAT)for simulation of watershed hydrology and multi objective genetic algorithm(NSGA-II)for spatial optimization of soil and water conservation *** optimized solutions provided a trade-off between the two objective *** final Pareto-optimal shows that the impact of soil and water conservation practices on sediment yield is more than stream *** trade-offs between the objective functions show that the implementation of the median cost can lead to a significant decrease of 22.1%in the amount of sediment yield,and 10%in stream ***,percent change achieved through median cost is very close to percent reduction with the highest *** of low cost solution show that the vegetative practices are a suitable economic scenario for soil and water *** introduced framework can be adapted as a suitable tool for selecting cost effective conservation practices in different regions.

关键词： Best management practices Effective watershed management Multi-objective optimization Nondominated sorting GA

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