Research of Comprehensive Evaluation of Agricultural Land Suitability in Typical Area of Huanghuaihai Plain based on GIS

The paper aims to study agricultural land suitability in typical agricultural area in Huanghuaihai plain by the comprehensive evaluation of natural factors and environmental conditions of agricultural land with Liaocheng area in Shangdong Province in the center of Huanghuaihai plain as a case.The results suggested that the land quality in Liaocheng was above the average and accorded with the local practical situation.The authors validated the scientificity of agricultural land suitability study by using GIS technology and proposed some suggestions on analysis results.

Urban Construction Land Suitability Evaluation Based on Improved Multi-criteria Evaluation Based on GIS(MCE-GIS): Case of New Hefei City,China

Urban construction land suitability evaluation （UCLSE） is a complex system engineering and the basis for rational use of the limited urban land resources in China. It has an important practical value on urban construction land use planning and management from the angle of methodology. As a widely used technique, traditional multi-criteria evaluation based on GIS （MCE-GIS）, is not suitable for UCLSE. This study develops an improved MCE-GIS method which could be more suitable for UCLSE based on urban complex ecological system theory and the summary of the shortcomings of traditional MCE-GIS. The improvements include three aspects： a composite evaluation index system rather than natural indexes alone, an index weight calculated by using fuzzy Analytic Hierarchy Process （AHP） method rather than the common AHP method, and the integrated overlay rule, which includes selecting the minimum value, weighted linear combination （WLC） and simple summation. The main advantage of this improved technique is that it can make UCLSE more comprehensive, more operational and more reasonable. It can provide a scientific basis for decision making in the planning and management of urban construction land use. The improved MCE-GIS system has been adopted in the New Hefei City, Anhui Province, China. Based on the results of UCLSE in New Hefei, three functional areas including construction-appropriate areas, construction-restricted areas and construction-forbidden areas could be worked out, in which 36.90% of the total study area could be developed as urban construction land and the remaining 63.10% should be protected as reserves land or as ecological land. Furthermore, the results can orovide scientific decision suooort for spatial planning and eco-environment nrotection in New Hefei.

Multi-Suitability Evaluation of Cultivated Land in Houhu Farm Area Based on GIS and Niche-Fitness

The niche-fitness and limited factors of rice, wheat, cotton and rape inHouhu Farm area of Jianghan Plain are analyzed by weighted average model and limited factor model.The niche-fitness theory and GIS are applied to the research on multi-suitability evaluation. Thehigh values of the niche-fitness (the maximum is 0.958) indicate that the environmental conditionsbasically meet the requirements of crops in the area. Suitability evaluation of single crop showsthat the degrees of suitability are satisfactory. Comprehensive suitability evaluation shows thatthe acreage for grade 1 (highly suitable for cultivation) accounts for 18.16% of the totalcultivated land area, whereas the acreage for grade 3 (critically suitable) and grade 4 (unsuitable)only for 8.9%. The main factors limiting the potential land productivity are cation exchangecapacity (CEC), available phosphorus content and accessibility level of road.

Characterization and Evaluation of Natural Resources for Land Use Diversification Planning: A Case Study in a Block of Meghalaya Using RS &GIS Technique

Characterization and evaluation of land resources of Mawryngkneng block was carried out using IRS-P6 LISS III and LISS-IV data. Five major physiographic units namely structural hills, denudational hills, plateau and intermontane valley were identified. Visual interpretation of satellite data indicated that 32.2% of the total geographical area (TGA) is under dense forest followed by wastelands (28.8%), open forest (16.1%), cultivated area (13.6%), built up area (8.2%) and water body (0.9%). Ten soil series were tentatively identified and the soils belonged to 2 orders (Ultisols and Alfisols), 3 sub orders (Udult, Udalf and Humult), 6 great groups, 8 sub groups. The soils are moderately acidic, deep to very deep and texture varies from sandy clay loam to clay. The soils are very rich in organic carbon. The availability of nitrogen is medium to high and phosphorus availability is low to medium whereas potassium availability is low in the entire study area. The soils were grouped into land capability class II & III and the soils were moderately to marginally suitable for orange and marginally suitable for pine apple. An action plan with suggested land use and interventions has been prepared by using all land resource information generated under the study. The action plan includes areas for afforestation, intensive cultivation in the existing cropped areas with soil conservation measures like mulching, zero tillage etc. and orange and pine apple plantation in open scrub lands which are cultivable wastelands. This might help the farmers and the planner in better management of land resources for sustained productivity.

Spatial Land Evaluation for Oil Palm Cultivation Using GIS （Geographic Information System）

The objective of the study was to establish spatial land evaluation for oil palm cultivation using GIS （geographic information system）. The study area is situated in the KESEDAR region in the state of Kelantan, Malaysia. The evaluation of the land in terms of the suitability classes were based on the method of FAO （Food and Agriculture Oganization of the United Nations）. Five land qualities are important for determining the physical land suitability for oil palm; these are nutrient availability, oxygen availability, water availability, workability and availability of foothold for roots. Each of the above mentioned land qualities with associated attribute data were digitally encoded in a GIS database to create thermatic layers. Overlay operation on the layer produced resultant polygonal layer each of which is a land unit with characteristics of the land. The results from GIS overlay analyses showed that Bungor, Chat, Chempaka, Alluvium, Musang and Tok Yong series are highly suitable while Kawang series is moderately suitable for oil palm cultivation. The same results were obtained by using parametric-limitation method.

Study on Low Hilly Cities Land Suitability Evaluation Method Based on Ecological Considerations—A Case Study of Longfeng New Town in Sichuan

Attention to the development of low hilly cities increases, in order to guide their development towards efficient and ecological land use. This paper takes eco-safety into consideration in the future layout of land for construction, and incorporates ecological security factors into traditional methods of land suitability evaluation based on topographic conditions. Taking the Longfeng New Town in Suining City as an example, the GIS platform is used to superimpose various evaluation factors. The evaluation index system is determined using the combination of the Delphi Technique and AHP. The result of correcting traditional land suitability evaluation is obtained, which provides decision support for improving the scientificity of land use planning and layout.

基于GIS的泸西县农业用地适宜性评价分析

通过GIS的空间分析以及主成份分析,对泸西县农业用地适宜性进行评价与分析。确定了该县农用地适宜性评价的参评因子及其影响度(隶属度),建立了适宜性评价指标与分类体系,划分农业用地适宜性等级,编绘农业适宜性等级图,为科学规划、合理利用、有效保护土地资源,促进可持续发展提供依据。

基于GIS软件的县级耕地质量等别年度更新评价研究——以松桃县为例

本研究基于GIS软件的空间分析工具,通过选取适宜松桃县的耕地质量等别评定基本参数、评价指标体系及权重,采用“因素法”对2019-2020年度新增、减少类耕地及质量建设耕地等别变化范围进行评定。结果表明,2019-2020年,松桃县减少耕地面积871.02 hm^(2),新增耕地159.91 hm^(2),新增耕地等别集中在9~11,质量建设耕地226.26 hm^(2);与“三调”统一时点耕地质量等别成果对比,提升0.01等别。基于本次耕地质量等别成果动态更新,以期为地区实现耕地资源信息的社会化服务及自然资源数量质量并重管理提供参考。

Ecological suitability evaluation for urban growth boundary in red soil hilly areas based on fuzzy theory

The fuzziness exists in spatial distribution of geographic data of land suitability evaluation processes,which makes it difficult to quantify land boundaries by using traditional binary logic-based overlay model.Aiming at this limitation,an ecological suitability evaluation analysis model was presented based on fuzzy theory and a research on urban growth boundary(UGB) of the Great-Hexi Leading District(GHLD) of Changsha was conducted.With the support of GIS,RS and MATLAB,slope,elevation,vegetation,soil productivity,soil permeability,water body and land use are selected as the input of model according to the characteristic properties of soil and terrain in red soil hilly areas.The running result of this model indicates that the ratios of highly suitable land,suitable land,moderately suitable land and unsuitable land in GHLD are 18.75%,10.31%,64.16%,6.78%,respectively.This result accords with spatial structure worked out by Space Development Strategy Planning of GHLD,Based on this result,several suggestions are made to guide UGB developments in future.

基于ArcGIS的村庄规划应用初探——以羌锋村用地适宜性评价为例

地理信息系统(GIS)作为强大的地理数据处理系统,在国土空间背景下的村庄规划中发挥重要作用。在现状调研、规划编制、规划评价和规划管理等环节,实现村庄规划的高质量发展。文章通过梳理论述基于ArcGIS的村庄规划编制应用,并以汶川县羌锋村用地适宜性评价为例,探索国土空间规划“双评价”成果向村庄规划编制的拓展方式,并对未来ArcGIS应用延伸提出展望。

基于MapEngine的城镇地价评估信息系统的研究

随着新的《土地管理法》的实施以及土地使用制度改革的进一步深入，必将会产生许多新的土地估价业务．本文对利用计算机来处理城镇宗地估价的工作进行了深入探讨，论证了在组件技术下，利用GIS基础平台MapEngine提供的组件，以通用开发语言为工具，构建城镇地价评估系统（ULEIS）的可行性，并对实例进行了比较．

基于GIS的半干旱生态脆弱区土地整治综合效益评价

科学评估土地整治综合效益对于提高土地利用效率、改善农村居民生产生活质量以及进一步落实乡村振兴战略具有重要意义。以半干旱生态脆弱区永昌县为例,采用熵权法和模糊综合评价法对其进行土地整治综合效益评价。结果表明:构建的模型可以准确体现各准则层指标的空间分布特征;整体土地整治综合效益评价中,综合效益等级为“优”,土地整治中生态效益对整体的提升作用最大。构建的土地整治综合评价体系可对研究区低效用地的整理整治,提升耕地质量,优化土地利用结构与布局提供借鉴。

基于GIS的建设用地适宜性和后备资源潜力评价

为协调生态环境保护与经济社会发展的关系,促进土地资源可持续利用,以都匀市2010年和2020年两期遥感影像作为数据源,经遥感影像解译生成两期土地利用数据,从自然环境和社会经济因素选定评价因子,构建建设用地适宜性评价指标体系。运用斑块生成土地利用模拟(PLUS)模型确定指标权重,利用地理信息系统(GIS)空间分析对建设用地适宜性和后备资源潜力进行评价研究。结果表明:适宜区、较适宜区、一般适宜区、欠适宜区和不适宜区分别占研究区土地总面积5.84%、15.76%、24.09%、28.89%、25.43%,适宜性等级以不适宜区为主;在空间分布上,适宜区分布在老城区中心区、匀东经济开发区中心区、甘塘工业园区的中心区和各乡镇的政府驻地,欠适宜区和不适宜区分布在高程较高、坡度较大,林地、草地集中分布的山区;后备适宜建设用地面积为61 982.1 hm^(2),适宜区、较适宜区、一般适宜区分别占后备适宜建设用地面积10.34%、34.6%、55.04%;适宜区规模最小,是城市未来发展的主要方向;建设用地适宜性等级的空间分布与研究区2020年土地利用现状实际分布相符,对区域的规划建设用地工作具有参考意义。

基于GIS的平定县高标准农田耕地质量等级评价研究

目前,高标准农田建设工作已在全国范围内取得较好成效,建设完成后每年都需进行耕地质量等级评价,因而对高效、合理、综合评价高标准农田的耕地质量等级工作提出了较高要求。本文结合实际情况,针对多种不同类型数据的指标特征,充分发挥地理信息系统(GIS)的优势,通过空间连接、Kriging插值、区域统计等数据处理分析方法,将新技术与专业评价方法相结合,形成一套较为完整的数据分析方法体系,提升耕地质量等级评价的效率和准确性。同时,对高标准农田建设中涉及的评价指标进行影响分析,对今后的高标准农田建设具有一定的参考价值。

GIS支持下土地整理中未利用地适宜性评价——以广西柳城县为例

土地适宜性评价是土地开发整理的基础 ,而未利用地作为土地开发整理的主要对象 ,本身就具有自然和经济上的特殊性 ,显然土地整理中未利用地适宜性评价更是土地开发整理中的关键性工作。结合GIS技术设计了土地整理中未利用地适宜性评价的总技术路线 ,进而对具体评价过程从以下四个方面进行阐述 :(1)未利用地评价单元的划分方法及在计算机中的生成技巧 ;(2 )评价因子的选取和评价指标体系的建立 ;(3)运用特尔斐法与数学模型相结合的方法确定各评价因子的权重 ;(4)评价结果生成过程。以广西柳城县为例运用本评价系统对其未利用地进行适宜性评价 ,能以较快的速度得到适宜性评价结果和各类适宜性用途的空间分布 ,并对全县未利用地的合理利用提出了可行性建议。

基于GIS的采煤塌陷区土地复垦项目规划设计研究

土地开发整理是现阶段中国实现耕地总量动态平衡的重要途径,采煤塌陷区土地复垦是其中重要的组成部分。受塌陷沉降的影响,采煤塌陷区具有地形破碎、微地貌起伏交错和土壤养分流失严重等特点,其在土地复垦项目的规划设计中面临的问题较一般区域复杂。在分析采煤塌陷区土地复垦规划设计流程与方法的基础上,借助GIS技术,将地形图中等高线进行栅格化处理,并根据得到的数据生成三维地形模型,对项目区地形进行模拟,并分别从复垦适宜性评价、项目规划择优以及项目工程设计三方面进行了实证研究。

生态位适宜度方法在基于GIS的耕地多宜性评价中的应用

以江汉平原后湖地区耕地为研究对象,将生态位适宜度方法引入到多宜性评价研究中,采用加权平均和限制因子模型对各评价单元水稻、小麦、棉花和油菜4种作物的生态位适宜度值及限制因子进行了定量分析。结果表明:研究区生态位适宜度值整体较高,最大值达0.958,生境条件基本能满足作物的需求;评价结果以1、2级为主,所占面积达75%;水稻的适宜性面积在该区最大,达65.54%,小麦次之;限制该地区耕地生产潜力的生态因子主要为:速效磷、CEC和道路通达度。该研究结果能直接指导农业生产实践,促进耕地的合理利用与管理。

基于GIS的江汉平原湖区农业用地适宜性评价

土地适宜性评价是土地资源规划与管理的重要内容 ,是确定合理的土地利用方式的前提 .在地理信息系统 ( GIS)应用中 ,土地适宜性评价主要是通过对土地的评分来确定其相对于某种用途的适宜程度 ,其过程一般包括选取评价因素 ,单因素评价 ,多因素乘权叠加即多因素综合评价 .相对于传统的纯数值评价方法 ,基于 GIS的土地适宜性评价方法将数值计算和图形处理有机地结合起来 ,具有简洁、直观、易操作和快速等特点 .运用 GIS工具 ,对地处江汉平原湖区的监利县主要农作物 (水稻、小麦、棉花、豆类、油菜等 )进行了土地适宜性评价 ,结果表明 ,GIS的应用可以有效地支持这一评价过程 .

基于GIS的城市最小生态用地空间分析模型研究--以深圳市为例

21世纪,全球范围内城市化已经成为人类社会发展的必然趋势,城市扩张不可避免地将大量的森林、农田、草地、湿地和水域等发挥着重要生态服务功能的生态用地转化为城市建设用地,对城市、区域乃至全球的生态系统造成较大的影响。在未来快速城市化过程中,保护必需的生态用地对于维持城市自身生态系统健康、改善城市居民生活质量和城市可持续发展有着重要意义。研究以中国经济特区深圳市为例,将景观生态概念模型与生态系统服务功能价值评估方法结合起来,在GIS技术的支持下,构建了城市最小生态用地空间分析模型,并分别按照保留城市面积30%、40%、50%和60%生态用地的4种情景,分析最小生态用地空间分布的合理性,结果表明论文所构建的最小生态用地模型能够很好地将城市当中具有重要生态系统服务功能的土地提取出来。

基于GIS的重庆市丘陵山地耕地质量评价与比较

利用农用地分等自然质量等指数模型,结合分模块控制的方法实现区域间等指数可比,对重庆市丘陵山地4个代表县耕地质量进行了评价。利用MapGIS采用多图层叠加确定评价单元并获取单元属性数据;建立省内2级区间可比的自然质量分综合评判模型;通过采用同能量标准化产量和引入光温协调系数,改进对光温潜力指数的加和。结果表明:丘陵区大足、低山丘陵区梁平以中高等地为主,低中山区彭水以中低等地为主,中山区巫溪以低中等地为主,地势起伏对丘陵山地耕地总体质量具有重要的影响。评价方法能实现跨区域和跨耕作制度间等指数的可比性,提高耕地质量评价的精度。