The Suitablity Evaluation Of Taihang Mountainous Areas Land Resources In Hebei Province

Land suitabiltiy evaluation is the most major content of land resource research in last 20 years, which can offer scientific reliable foundation basis for land resource development and use reasonably. Land resource suitabiltiy evaluation belongs to the category of land evaluation, and its task is to definite the best land use direction according to the land suitability. According to the restricted factor type and its strength of land, the administer and reform measure is to be established in accordance with local conditions, to serve for using reasonably and managing program land scientifically. This article elaborated the principle, content and method of land resource suitabiltiy evaluation in detail. The development and function of GIS (Geographic Information System) has been introduced briefly and the necessity and feasibility of land resource suitabiltiy evaluation by GIS have been analysesed. The function and characteristic of the GIS software such as Maplnfo and ArcView have been introduced briefly, and the technologic route of the suitablity evaluation of Taihang mountainous areas land resources in Hebei province have been established.It is that this research carries out the specific practice of land resource suitabiltiy evaluation: First, according to the principle of selecting the evaluated factors, the 13 evaluation factors used in the land resource suitabiltiy evaluation have been defined. Secondly, the weight of each factor has been calculated by the measure of Analytic Hierarchy Process and the unit of the land suitability evaluation application has been determined with grid law. Then, the spacial database of each factor has been established using the relevant data information and the graph information of 13 evaluation factors such as earth layer thickness, irrigation guarantee rate and soil structure and so on. The result of the land suitabiltiy evaluation would be obtained after the overlaying analysis by using GIS software. Then we got the classified quantity and space distribution of the land that is suitable for farming, forest and herd of Taihang mountainous areas land resources in Hebei province. The land suitabiltiy evaluation result shows that the area of the land suitable farming, forestry and herd of Taihang mountainous areas in Hebei province is 1,102,120 ha, 1253586.7 ha and 682286.7 ha, and take 22.1%, 40.6% and the 35.7% of land gross area respectively. Comparing present situation and the result of the suitabiltiy evaluation, the spacial adjustment of land use structure of Taihang mountainous areas in Hebei provincehas been analysed in the angle of quantity and region. The rational advice have been put forward on land use of the in the future on the basis of anylasing the obstacle factor of land use in Taihang mountainous areas.In the whole process of the work, one step was linked with another closely, and the procession of calculating coefficients and the outputting of the final map realized autoimmunization, which have economized time, risen the efficiency and raised precision. The result of Land suitabiltiy evaluation of Taihang mountainous areas land resources in Hebei province reflect the local fact, and the farming, forestry and herd structural adjustment have been offered in land use in the future.The article have important reference and reference meaning for the land resource suitabiltiy evaluation research of mountainous area as well as land use spacial structural adjustment.