Suitability Evaluation Of Land Reclamation In Heishui Village Of Longhua County

Land resource is an important space for human production and life,and the spatial difference of land determines the final use of the land.At present,our country is in a period of rapid development,the demand for all kinds of resources is also increasing,and the exploitation and utilization of resources is bound to bring about the destruction of land resources.In the case of land resources is declining,our country's population is still growing,so it's become more and more important to reclamating the destruction of land.Suitability evaluation of land reclamation is the core work of land reclamation in mining area,Through the suitability assessment of the land to be destroyed,the final reclamation direction of the damaged land in the mining area can be scientifically determined.With the improvement of land suitability evaluation in mining area,its function is more and more important.In this paper,the iron-lead-zinc mine in Heishui Village of Longhua County is taken as an example to evaluate the suitability of the land.Contents: First,Analysis on the background,purpose and significance of suitability evaluation of land reclamation and research trends at home and abroad.Second,define the related concepts of rural settlements reclamation,state related theoretical basis.Third,Analysis of the natural ecological environment,economic and social condition,land utilize situation and prediction of the extent and types of land damage in the mining area.Fourth,According to the production and construction,the mining area is divided 7 evaluation units and select the appropriate evaluation factors and evaluation system.First of all,the evaluation of land quality grades will use the method of limited condition.And then refer other literatures to using the method of principal component analysis,this part will choose the evaluation factors.The evaluation of land limiting classes will make use the method of synthesis index and The Application of Analytic Hierarchy Process(AHP).At the end,The suitability evaluation's result finally comes out.Fifth,Taking some reclamation measures,The main basis of which will be engineering measures,the biochemical measures as assistance and so on.Sixth,Summarize this article,put forward the future research prospects.Conclusions:The area of the land to be damaged is 10.3063hm2,A part of the forest land is 9.923,the other is the grassland for 0.3833 hm2.Combined the actual situation of the mine with the evaluation results that: Heishui village of main area for land qualitygrades is to forest and grazing,lands for not adapts farming;The main limiting factors of affecting the evaluation result with the land utilize situation are the guarantee rate of soil source,the soil texture and the thickness of tillage layer.During the mining should protect the peeling of the topsoil,land reclamation to strengthen the soil reconstruction technology;in forest direction of the mining land have one,two and three in land class,it is also suitable for grass land.In the actual reclamation work,we should be based on the best overall benefit to plant forest or grass.