Optimal Allocation Of Soil-water Resources In Guanzhong Area Based On GIS

Soil-water resources are mankind’s survival of the most basic resources, and regionaleco-environment quality is closely related to its distribution pattern and utilization of mutualinfluence, and are inseparable. Guanzhong region water shortages, limited land resources, andmatch the dislocation, the optimal allocation of land and water resources, ease the Guanzhongregion man and water conflicts, human soil contradiction to improve the waste of resourcesand ecological problems, and promote soil-water resources rational development andutilization has important theoretical significance and practical value.Based on sustainable development, the principle of balanced economic, social andecological benefits, the use of systems engineering theory of planning methods and ArcGISspatial analysis functions to analyze the distribution characteristics of the off in a regionalwater and land resources space, Exploitation status and trend and drivers, to study the spaceof soil-water resources to match the pattern, constructed and solved in Guanzhong areasoil-water resources optimization model, system analysis and evaluation of the configurationresults, proposed safeguard measures implemented by the water resources optimizationprogram. Thesis to obtain the following main conclusions:(1) Soil-water resources statistics and the Guanzhong region1:1000000land resourcedata sets, GIS thematic maps, distribution characteristics of soil-water resources of theGuanzhong region and take advantage of the status quo were evaluated. The evaluationshowed that the Guanzhong region of total water resources are scarce, water resources percapita, per hectare of arable land occupies a volume in the country a relatively low level ofwater resources; precipitation, surface water resources, groundwater resources and the totalwater resources were shown southwest than the northeast of the pattern of distribution isextremely uneven, but the higher level of utilization of water resources, water supply,structure of water to agricultural water use. Guan in the cities and land-use structuredifferences, but, overall, land-use types mainly agricultural land, the largest proportion ofwhich arable land, land development and utilization of the degree in the mid to upper level,land use and land suitable for a match exists dislocation.(2) Water consumption in accordance with the various departments of the Guanzhong region, socio-economic statistics and the1985,1995and20001:1000000land use data,combined with ArcGIS technology to calculate the land transfer matrix, the gray relationaldegree analysis of regional soil-water resources in the off-use changetrends and drivers. Theresults showed that experienced a steady smaller Guanzhong region water consumptionchange, rapid growth, and significantly reduce and stabilize four stages; water structuralchanges reflected in the proportion of agricultural water became smaller and smaller,industrial water and domestic water consumption gradually increased; Guanzhong area waterconsumption drivers of change, including climatic factors, population factors, economicfactors and repeated water rate. Guanzhong area of land use structure presents cropland andconstruction land concentrated in plain basin area, while the woodlands and grasslands suchas the distribution of the southwest and north mountain of features; land use types in themutual transfer of showing the construction land occupied by arable land, arable land andgrassland each other circulation frequent the woodland area is more stable without the use ofchange in a significant reduction and other characteristics; population growth, urbanization,industrialization, and policy preferences is the main driving factors of land use structurechange.(3) Based on the GIS and DeoDa software, the use of global self-analysis and partialautocorrelation analysis to match the pattern of soil-water resources of the Guanzhong regionwas evaluated. The evaluation results show that poor matches, off the soil-water resourcesspace, a large population center of the basin, a prosperous economy, a large proportion ofarable land, but the scarcity of water resources, particularly serious Chunhua, Liquan,Fuping,Gao Ling, Jing Yang, Pucheng and other counties; Guanzhong region southwest ofsmaller population, industrial development is moderate, a smaller proportion of arable land,but rich in water resources, Taibai, Fengxian and Mei County, is relatively water-rich region.(4) Land use types as decision variables, objective function to maximize the economic,social and ecological benefits, water resources utilization as a major constraint, theestablishment of a multi-objective linear optimization model using MATLAB on the modelsolution. The results show that, in Guanzhong area of land use reasonable structure of arableland, construction land, woodland, grassland, waters, not use to, respectively,178877km2、2960km2、26445km2、7454km2、554km2and89km2;2000status In comparison, the region’sgross domestic product (GDP) increased by21.907billion yuan, secondary and tertiaryindustries accounted for the national economy rose from88%to93%, the departments totalwater demand by561million m3, agricultural water demand from the total water demand65%to52%, the region’s green equivalent increase of9593.69. On this basis, the adaptiveconstraints of land on the map of current land use SHAPEFILE format, change the attribute values of the corresponding block, the optimal allocation of the results of the implementationof the land unit, and thus the optimal allocation of soil-water resources protection measures.Thesis research results to promote the sustainable development of soil-water resources inthe Guanzhong area, improve the ecological environment reference.