Arable Exploitation Suitability Evaluation For Unused Land Based On GIS

With the continuous growth of the population in our country,city urbanization steadily,facing more and more serious challenges present utilization of cultivated land,on the one hand to ensure national food safety in production,the major problems but also to solve the over one billion population of our country food and clothing,on the other hand in City construction and development are constantly occupied a lot of cultivated land resource,therefore suitable for cultivation of unused land development becomes more and more important.Unused land refers to the land of agricultural land and construction land outside,including grassland,saline alkali land,swamp,sandy land,bare land,bare rock.Unused land suitable for cultivation suitability evaluation is an important aspect in the evaluation of land resources,is one of the most important research content of unused land suitability evaluation,is an important reserve land resources in our country,is the effective way of supplementary cultivated land in china.The development of reasonable unused land resources is particularly important for the protection of national food security,but also conducive to promoting the development of regional economy,increase the income of farmers,to protect the ecological environment of stability.Land suitability evaluation is based on the natural and social attributes of land economic evaluation of land for a land use suitability and suitable degree of’ work,is the decision of land use planning,scientific basis for land use planning,land use is an important basic work for the overall planning,is a hot topic in land science in,is an important basis for land development and rehabilitation and development strategy research.The thesis of the study area is suitable for cultivation of unused land suitability evaluation methods used a combination of qualitative and quantitative is studied,firstly studies the unused land suitable for cultivation of building evaluation index system suitability,considering the natural,social,economic,resource,ecology and other related factors,based on theoretical guidance next,according to the Yunxian for the screening of soil slope,a special ecological condition complicated mountain county comprehensive consideration,water conditions,16 kinds of evaluating factors,determine the level of the relationship between the various factors,and the influence of various factors on the proportion of cultivated land development analysis.The construction of the unused land suitable for cultivation suitability evaluation index system.And then construct the unused land suitable for cultivation suitability evaluation model,select the model of multiple index decision making,using statistical analysis method using the weighted sum model and limit condition method on evaluation factor values were standardized,so as to better for unused land suitability evaluation.Experts using expert scoring method and analytic hierarchy process consulting is committed to long-term study of this aspect of the problem,make sure each candidate evaluation factors,and the importance of the relationship between the evaluation factors,the evaluation of the relationship between the weight factor is obtained through YAAHP software,to determine the weights of each evaluation index.Finally has carried on the unused land suitable for cultivation suitability evaluation,combining the unused land suitable for cultivation suitability evaluation model,the application of GIS data processing techniques and a variety of research methods in the county of unused land into the most suitable,moderately suitable,marginally suitable and unsuitable four arable level.Unused land arable classification according to the results,the unused land suitable for cultivation in the development potential of partition,to each villages and towns were statistical unused land arable area distribution.In this study,focusing on the evaluation system of evaluation factors selection and the determination of the weight,and on the basis of the traditional evaluation system,increase the ecological factor,which makes the evaluation results more scientific,accurate and reasonable,the development and utilization of more operational,can achieve more ideal effect.A virtuous cycle of sustainable utilization of land resources and help and agricultural eco system,to promote the development of local agricultural economy.