| Water-land resources is indispensable material foundation of human subsist anddevelopment, which is the basic element of the ecological environment. With thedevelopment of society, the extent of Water-land resources development and utilization isstrengthened ceaselessly. During the land use planning ignored water resources constraint thatcauses coupled contradictions of water-land resources is increasingly intensified.Therefore, the development of water-land resources optimize allocation technology based onwater resources carrying capacity has become an important part of the sustainabledevelopment of water-land resources.Huanghuashi is the key areas of economic development strategy in Hebei province.Along with the rapid economic development, the extent of land resources development andutilization is strengthening constantly and the region needs more and more water resources.Especially without considering the carrying capacity of water resources adequately in landplanning and industry strategic layout for a long time, outstripping the bearing capacity ofwater resources, caused so serious coupled contradictions of water-land resources. Therefore,allocating the land resources under the restriction of the water resources has a greatsignificance in solving coupled contradiction of water-land resources and promoting thesustainable utilization of water-land resources.On the base of studying the relevant literature and guided by the security of water-landresources and the principle of sustainable development,using GIS combined modelsimulation and quantitative analysis method to optimize the coupled contradictions ofwater-land. The main research results are as follows:(1) Through survey and collating basic data evaluated the characteristic of water quantity,water quality, land use structure and space distribution. With the aid of GIS software, thethesis set up spatial database which mainly includes Huanghuashi DEM, present landutilization map and soil type map, and attribute database that mainly includes precipitationdata, land use, soil physicochemical property and related social economic attributes.(2) On the basis of calculating the direction of flow and confluence cumulant dividesHuanghuashi into52catchment areas based on calculation threshold value of research area. By the overlaying analysis of catchment areas and land use type and soil type, the catchmentareas were divided into828hydrological response units.(3) With the aid of GIS software, using HRU as basic computing unit, the paperestablished the spatial simulation model of water resources and water demand under differentland uses based on actual situation of Huanghua. And then imitating the quantity of waterresources one HRU by one HRU to establish the spatial distribution of water resources andwater demand.Based on statistics analysis of HRUS, indicated the conclusion that thequantity of water resources and water demand are284.08507million cubic meters and329.563million cubic meters.(4) Establishing water-land resources coupled model,each HRU was simulated toestablish the water-land resources coupled map in small scale. The result of coupled ofwater-land resources which can be divided into extreme abundant area, abundant area,balance area, scarce area and extreme scarce area.(5) In order to realize the sustainable development of water-land resources and theenvironmental and economic benefits of Huanghuashi, using the spatial adjustment model ofwater-land resources coupled system adjusted the land use type in GIS circumstance，obtaining the map of water-land resources coupled spatial adjustment.At the same time,on thebasis of emphasizing the constraint condition of water resource,adjusting the spatialdistribution of basic farmland and construction land to get adjustment of land-utilizationplanning to the water resources. |
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