THE CREATION OF A SPATIAL GIS-REALIZED MODEL OF RATIONAL LAND RESOURCES USE OF EROSION-DANGEROUS LANDS
Journal Title: Вісник Одеського національного університету. Географічні та геологічні науки - Year 2015, Vol 20, Issue 4
Abstract
Purpose. One of the most reasonable mathematical models of rational land use is a logical and mathematical model, which was proposed by H.I. Shvebs. The factors of the soil system functioning are accepted unchanging within the territory. But all factors of water-erosive process, and also factors of forming of the soil productivity are considerably changeable in the space. The purpose of this research is the spatial realization in the GIS of model of the rational land use which taking into account the changeability of basic factors of forming of the soil productivity and its losses as a result of water erosion within the hills. Data & Methods. The fixed system of mathematical equalizations of optimization variant of logical and mathematical model of H.I. Shvebs is in basis of spatial realization of model of the rational land use. The methods of the field survey, statistical processing of the field data and mathematical and geoinformatical modelling are applied for the modelling of spatial changeabilityof factors of water erosion and forming of fertility of soils. The method of geoinformatical modelling is used for realization of model of the rational land use in GIS PCRaster. Results. The spatial model of rational land use consists of a few programmatic modules, which are constituents directed on quantitative calculations of: spatial changeability of actual losses of soil as a result of water erosion, spatial changeability of the productivity of crops, expediently possible losses of soil, amount of organic fertilizers, necessary for maintenance of fertility of soil. The crop yields, which determines the income and expenditure of humus in the soil and soil erosion, which determines the flow rate of the soil resource are presented like the individual modules. The spatial model of rational land use allows to elect the most optimum variant of land-tenure for relatively small areas on the basis of quantitative imitation experiments in the interactive mode.
Authors and Affiliations
A. V. Pyatkova
Keywords
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