县域表土剥离再利用供需平衡研究

发布时间：2018-03-04 00:12

本文选题：表土剥离　切入点：表土再利用　出处：《中国地质大学(北京)》2017年硕士论文　论文类型：学位论文

【摘要】：在耕地后备资源紧缺、占补平衡压力加大、土壤重金属超标问题不断突出的背景下,为摸清区域建设占用表土剥离潜力和土地整治客土需求,解决表土剥离与表土需求错位问题,本文以江苏省B市为例,综合考虑土方量、立地条件、土壤肥力、土壤环境质量等因素,从数量和质量两方面构建表土剥离再利用潜力评价指标体系,运用加权综合法、限制系数法、空间叠加法,评价县域表土剥离潜力和土地整治表土需求潜力,并进行区域表土剥离再利用供需平衡探讨,以期为表土剥离再利用工作的有序开展和专项规划的编制提供借鉴。研究结果表明:(1)2014-2020年,研究区规划占用农用地土壤质量整体较好,一级土壤占规划占用农用地总面积的57.33%,土壤肥力整体差异不大;仅有7.31%的农用地表土重金属含量超标,且主要分布在F、Q、R、E等镇;表土剥离潜力级别以I、II级为主,潜力总量为754.52×104m3;F、K、P、Q、R等镇为重点剥离镇;A、E、G、J、L、M、N、S等镇为次重点剥离乡镇。(2)表土再利用区域面积土壤质量整体较好,一级土壤占表土再利用区域总面积的69.84%,高标准农田建设田块土壤肥力与建设占用的农用地差异不大;三级土壤均由土壤重金属含量超标所致,主要分布在B、J、Q镇,且工矿废弃地超标状况较为突出;表土需求潜力级别以I级为主,需求数量潜力总量为1152.62×104m3;E、B、Q等镇为表土再利用重点区域,G、J等镇为次重点区域。(3)县域内表土供给量小于需求量,行政村内、乡镇内行政村间、乡镇间实现表土需求平衡量分别占总需求量的12.19%、16.87%、30.85%;多数乡镇内部表土调配距离在10km左右,但B、E、G、Q乡镇客土平均距离较远。基于以上研究,得出以下结论:研究区规划占用农用地表土质量较高,但可剥离表土数量无法满足土地整治表土再利用需求。根据表土调配原则,先后进行行政村内、乡镇内部行政村间和乡镇间表土匹配平衡,明确了各乡镇客土的来源和调配的平均距离,可为表土剥离再利用方案的制定提供一定程度的参考。
[Abstract]:Under the background of the shortage of reserve resources of cultivated land, the increasing pressure of balance between occupation and compensation, and the problem of heavy metals exceeding the standard, in order to find out the potential of surface-soil stripping and the demand of land reclamation for regional construction, To solve the problem of surface soil stripping and surface soil demand dislocation, this paper takes B city of Jiangsu Province as an example, considering the factors such as earthwork quantity, site condition, soil fertility, soil environmental quality, etc. The evaluation index system of peeling and reusing potential of topsoil is constructed from the aspects of quantity and quality. Using weighted synthesis method, restriction coefficient method and space superposition method, the paper evaluates the potential of surface soil stripping and the potential of surface soil demand in land regulation. In order to provide reference for the orderly development of surface soil stripping and reuse work and the compilation of special planning, the research results show that the planning of the study area occupies the overall good soil quality of agricultural land from 2014 to 2020, in order to provide a reference for the orderly development of surface soil stripping and reuse work and the compilation of special planning. The first grade soil occupies 57.33% of the total land area occupied by the plan, and there is little difference in soil fertility as a whole; only 7.31%% of agricultural land have heavy metal content exceeding the standard, and mainly distributed in the towns such as Fen Qu Rong E, and the potential grade of surface soil stripping is mainly in grade II. The total potential is 754.52 脳 10 ~ 4m ~ (3) F ~ ((1)) K ~ (+) P ~ (+) ~ (Q) R, etc., as the focus of peeling off the town, such as the town of Agna, Gou, Li, Li, N, S, etc.) the soil quality of the area reused by the topsoil reusing area is better than that of the other towns as a whole. The first grade soil accounts for 69.84% of the total area of surface soil reuse, the difference between the soil fertility of high standard farmland construction and the agricultural land occupied by construction is not significant, and the third grade soil is caused by the excessive heavy metal content in the soil, which is mainly distributed in Bang Jang Q town. The level of surface soil demand potential is mainly grade I, and the total quantity of demand potential is 1152.62 脳 104m ~ (3) E ~ (+) B _ (Q), which is a sub-key area for the reuse of topsoil, and the supply quantity of surface soil is less than the demand in the county area, such as the towns such as Geng J and other towns, which are the sub-key areas for the reuse of the topsoil, and the level of the topsoil demand is higher than that of the other towns. In the administrative village, the balance of the topsoil demand among the townships and villages accounts for 12.19% of the total demand, and most of the villages and towns have a distance of about 10 km in the distribution of the topsoil, but the average distance between the villages and towns is relatively long. Based on the above research, The conclusions are as follows: the quality of surface soil occupied by the study area is high, but the quantity of peelable topsoil can not meet the demand of surface soil reuse. According to the principle of surface soil allocation, it has been carried out successively in administrative villages. The matching balance of the topsoil between the administrative villages and the towns within the villages and towns, and the determination of the origin and the average distance of the deployment of the Hakka soil in the villages and towns, can provide a certain degree of reference for the formulation of the plan for the stripping and reuse of the topsoil.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S15;X53

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