Study on Urban Construction Land Suitability Evaluation in Southwestern Mountainous Areas of Yunnan Province Based on the Strategy of "Protecting Farmland in Flatland Areas and Constructing Mountainous Cities" : A Case in Lianghe County

According to the particularity of towns＇ construction in the southwestern mountainous areas of Yunnan Province, this study has built constructive land suit- ability evaluation index system which is different to flat area. Then this study deter- mined single evaluation factors index and comprehensive suitability index using ＂ex- treme conditions method＂ and ＂suitability index method＂, and analyzed and assessed the constructive land suitability on each evaluation unit polygons and its suitability level by using GIS software. Taking Lianghe County of Dehong Dai-Jingpo Au- tonomous Prefecture as an example to evaluate land suitability in Lianghe County＇s main towns around the gentle slope, the results show, in the evaluation area, the area of land suitable for construction and unsuitable for construction respectively ac- count 73.58% and 26.42%. And first-class, second and third-class of land suitable for construction should be composited at the ratio of about 11：49：40. The suitability evaluation index system and method developed in this paper is applicable for evalu- ating the construction land suitability in mountainous areas of southwest Yunnan Province, and will provide theoretical and technical support for land policy measures which strengthen the protection of farmland and promote the scientific development of urbanization in Yunnan Province and even similar mountainous areas of the whole China.

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.

Spatio-temporal Evolution of Urban Expansion Based on a Novel Adjusted Index and GEE: A Case Study of Central Plains Urban Agglomeration, China

It is crucial to investigate the urban agglomerations spatio-temporal evolution patterns and driving factors for analyzing the urban spatial structure-functional division and promoting the coordinated development of urban agglomerations.In this study,a novel vegetation-building-nighttime light-adjusted index(VBNAI)was established for rapid and effective mapping of urban construction land(UCL)in Central Plains Urban Agglomeration(CPUA),China during 2000–2020 based on Google Earth Engine(GEE)platform.Compared with traditional indices,VBNAI can significantly decrease the blooming effect,Normalized Difference Vegetation Index(NDVI)saturation,and soil background of nighttime light data.In addition,the urban expansion indices and standard deviation ellipse model were synthetically adopted to analyze the spatio-temporal evolution pattern of urban expansion.The gravity model and the geographically weighted regression model were employed to determine the spatial interaction forces and drivers of urban expansion,respectively.The results showed that the VBNAI index has obvious advantages in efficiency and accuracy to extract UCL with the overall accuracy of more than 91%.The UCL of CPUA had increased by 4489.84 km2 during 2000–2020 with the gravity center moving towards southeast continuously.From 2000 to 2010,the urban expansion was in a‘center-hinterland’pattern which had benefit from the favorable effect of the traffic shaft belt.During 2010–2020,the urban network structure had basically established.Urban expansion had been influenced by a variety of socio-economic and demographic factors,and the impact degree varied from region to region.This study could provide scientific references for facilitating the intensive utilization of urban resources and optimizing the spatial development pattern of urban agglomeration.

Comprehensive Assessment of Urbanization Coordination:A Case Study of Jiangxi Province, China

In order to make assessment on urbanization coordination, we developed a comprehensive model by integrating entropy weight method(EWM), coupling degree model(CDM), coupling coordination degree model(CCDM), multi-index grading method(MIGM) and Remote Sensing & Geographic Information System(RS & GIS) technology. Then we applied this integrated model to a case study in Jiangxi Province, China. Our study finds that: 1) EWM, CDM and CCDM can evaluate the temporal dynamic of urbanization. Urbanization process of Jiangxi Province can be divided into three periods, the stable development period(1990–2001), the accelerated development period(2002–2009) and the rapid development period(2010–2015). Coordinated development of urbanization in Jiangxi Province can be divided into two phases, an increasingly coordinated phase(1990–2003) and an increasingly incongruous phase(2003–2015). The state transition was due to low development rate of population urbanization. 2) RS & GIS technology is an effective tool for detecting urban growth. Urban construction land area of Jiangxi Province increased from 615.8 km^2 in 1990 to 2896.8 km^2 in2015, and the per capita urban construction land area(PCUCLA) reached 122.9 m^2, with the maximum value of 343 m^2 in Gongqingcheng City. 3) MIGM and RS & GIS technology can analyze spatial difference of urbanization. There is a significant spatial difference in socioeconomic development at county scale, with the maximum value six times the minimum value for both PCUCLA and per capita GDP in 2015. Population urbanization lag and excessive land use are the main reasons for uncoordinated urbanization. There were 15 counties with a lag in demographic urbanization and 33 counties where PCUCLA exceeded the national standard in 2015, among which 20 exceeded the national standard of PCUCLA by 50%(≥165 m^2). Since there are significant spatio-temporal differences in urbanization, it is necessary to carry out a comprehensive assessment to facilitate differential urbanization strategy making.

Urban land expansion and arable land loss of the major cities in China in the 1990s

Based on the land-use data in 1990 and 2000, determined by interpreting Landsat Thematic Mapper (TM) imagery, this paper defines the extent of urban construction land, and extracts patches of urban construction land of 145 cities with the largest areas in 1990 and arable land patches around these cities. With these data, this paper analyzes the characteristics of ur- ban construction land expansion and the consequent arable land loss in East, Middle and West China, and further identifies the social, economic and spatial factors of the urban land use changes, using GIS (Geographical Information System) and multivariate regression approaches. The results show that total urban land of the 145 cities expanded by 39.8%, with about 70% of the new urban land converted from arable land in the 1990s. The urban land expansion varied among the three regions, with a value of 43.0% in the East, 33.1% in the West (33.1%) and 17.8% in the Middle. Moreover, mean urban construction land per capita increased by10.7% in the East, but it decreased by 7.7% in the Middle, 1.4% in the West. Statistical analysis indicated that total wages of staff and workers could best explain the differences of urban land expansion.

基于景观生态的城市土地开发适宜性评价——以丹东市为例

城市土地开发适宜性评价是城市总体规划中的一项重要基础性工作,其核心是合理分配利用有限的土地资源。在进行耕地适宜性评价和建设用地适宜性评价的基础上,针对丹东市不同的发展目标,提出3个城市土地开发适宜性评价方案,包括经济发展优先方案、生态保护优先方案以及协调发展方案,并按照3个方案对丹东市进行城市土地开发适宜性评价。通过选择适当指标,构建了由景观稳定度和景观干扰度组成的景观生态质量评价体系,并对3个适宜性方案进行对比与优选。结果表明,丹东市按照经济发展优先的城市土地开发适宜性方案进行开发,则景观干扰程度最高,景观稳定程度最低,景观生态质量最低;按照生态保护优先方案进行开发,则景观干扰程度居中,景观稳定程度最高,而景观生态质量居中;按照协调发展方案进行开发,则景观干扰程度最低,景观稳定程度居中,并且具有最高的景观生态质量。通过综合比较,应选择协调发展方案作为丹东市城市建设空间布局的首选方案。

城市建设用地生态适宜性评价的潜力—限制性分析——以大连城市化区为例

城市建设用地生态适宜性评价是合理利用我国有限土地资源的一项基础性工作,本研究的特色是以大连城市化区为例在归纳GIS方法应用的基础上,将目前国内广泛采用的单纯权重叠加法推广到加权的潜力—限制性分析法。该方法的主要优点是把评价要素分为生态潜力和生态限制性两大类,通过取大原则和成对明智比较法分别确定权重,从而更加科学确定土地利用生态适宜性等级。结果表明,大连可做高强度开发的城市建设用地面积约为850.46km2,约占总面积的6.28%;可在指导下进行适度开发利用的土地面积为1835.97 km2,占总市域面积的13.56%;而不宜作为建设用地的土地(不适宜和中低适宜区)面积为10851.92km2,约占总市域面积的80.16%,即城市建设用地的影响范围应该控制在区域的20%土地利用类型中,另外80%的土地不适宜进行城市建设的开发。根据上述结果,全区规划分为优化建设区、重点建设区、限制建设区和禁止建设区,并提出用地分区发展管制对策。

平谷区城镇建设用地生态经济适宜性评价方法

研究目的:从生态保护和经济发展的角度,研究城镇建设用地的适宜性评价指标体系和评价方法,以期为城市规划和土地利用总体规划的城镇发展用地合理布局和科学评价提供有效范式。研究方法:以GIS栅格技术为支撑,利用多因素加乘复合算法和互斥性矩阵分类方法进行城镇建设用地适宜性评价,利用对比分析法佐证评价方法与结果的有效性和合理性。研究结果:平谷区城镇建设空间布局可优化为优先建设区、适度建设区、控制建设区、适度保护区、重点保护区和禁止建设区,分别占全区总面积的22.97%、12.15%、11.69%、9.93%、12.90%和30.31%;城镇建设用地适宜程度在空间上呈圈层分布特征,由平原向四周的半山区和山区逐渐降低;评价结果与平谷区城市规划成果具有较好的一致性。研究结论:提出的评价方法对城镇建设用地适宜性评价是有效的,评价结果可以为城镇建设用地规划布局提供科学依据。

基于空间开发适宜性分区的城镇建设用地配置——以海安县为例

依据经济社会发展需求和资源环境承载能力的区域差别,进行建设用地配置,是区域空间引导和控制的重要内容。借助GIS空间分析方法,基于资源、环境、经济和社会等各方面要素进行空间开发适宜性分区分析,综合考虑城镇建设用地扩展的经济社会发展需求和资源环境承载力及其用地发展潜力,讨论了城镇建设用地数量和空间配置的方法。基于该方法,以海安县为案例区进行验证,分析表明:2020年该区城镇建设用地集中分布在县域中部和东南部资源环境约束较小、发展潜力较大的地区,有助于发挥不同地区的主体功能,实现区域人口、经济和资源环境的协调发展。

城乡建设用地增减挂钩项目区的时空联建

合理设置项目区是城乡建设用地增减挂钩规划的核心内容。该文以北京市平谷区为例,基于供需和级差地租理论,在已有农村居民点整治潜力和挂钩分区研究的基础上,开展了城镇建新适宜度与农村拆旧适宜度评价,经建新地块的规划修正和拆旧地块的空间相对集聚、适宜度一致性修正,选择出挂钩建新区和拆旧区,然后通过挂钩联建的关系原理分析,建立了挂钩时空联系的逻辑模型,将建新区和拆旧区组合形成挂钩项目区。结果表明,该方法能够有效的筛选出建新区与拆旧区,可以实现挂钩项目区的组合联建与时空配置。研究区整体上属于"供大于求"的挂钩类型区,农村居民点拆旧潜力的供给能够满足城镇建新的需求;全区城乡建设用地增减挂钩项目区可规划为22处,时序上分为近期8处、远期14处,空间上包括乡镇内挂钩17处、乡镇间挂钩5处;经建新用途、拆旧与安置方式的合理安排与设置,实现了促集约和保发展的挂钩目标。该研究为挂钩项目区条件设定与选择、空间联动和时序安排提供参考。

重庆市两类城乡建设用地增减挂钩模式的比较

研究目的:通过对比重庆市指标周转模式和地票交易模式,分析两种模式的共性及差异,以期更深入地了解重庆市城乡建设用地增减挂钩政策的实施情况,并为全国其他试点区域进行模式创新提供参考。研究方法:文献研究和对比分析法。研究结果:两种"挂钩"模式的设计机理相同,但具体运作形式和实施效果却存在显著差异。研究结论:两种模式是在重庆市积极推行城乡建设用地增减挂钩政策的背景下出现的,并均围绕着"挂钩"指标的产生、使用和农民补偿三个环节进行模式设计。在指标周转模式中,政府主导整个模式的运作,是一种趋于层级制的治理结构,而在地票交易模式中,市场则起主导作用,是一种趋于市场制的治理结构。指标周转模式中,"挂钩"指标具有较高的利用效率,但伴随着较高的耕地保护风险并容易造成农民权益受损,而地票交易模式则在耕地保护和农民权益保障方面具有更好的表现,但受限于城市规划和土地规划,"挂钩"指标利用效率较低。

城乡建设用地增减挂钩中拆旧地块选址适宜性评价研究——以辽宁省桓仁县华莱镇为例

为了更加合理的选择拆旧地块,以辽宁省桓仁县华莱镇为例,通过实际分析与特尔菲法选取14个评价指标,通过层次分析法确定指标的权重,采用加权指数和法计算评价得分,并运用累积曲线分级法将评价对象分为四类区域。结果表明最适宜拆旧区占居民点总面积的4.14%,适宜拆旧区占居民点总面积的6.16%,不适宜拆旧区占居民点总面积的31.91%,最不适宜拆旧区占居民点总面积的57.79%。

农村土地资源集约利用及空间配置模式探讨——基于城乡建设用地增减挂钩视角

以成都市新都区斑竹园镇和军屯镇为增减挂钩试验区,探讨农村土地资源集约利用及空间配置模式,并提出了增减挂钩的保障措施。结果表明,试验区农村土地通过增减挂钩空间配置,可有效增加耕地0.94 hm2,农民集中居住区集约使用9.53 hm2建设用地指标,节约建设用地指标37.03 hm2。城乡建设用地增减挂钩模式是缓解城乡建设用地矛盾、保护耕地、推进土地节约集约利用、促进城乡协调发展的重要途径之一。

基于GIS的城市建设用地生态适宜性评价——以福建省连城县为例

在我国快速城市化进程中,城市建设用地盲目扩张,不仅造成土地资源的浪费,而且造成城市生态环境的破坏.本文以GIS为技术支撑,采用"取大值"原则与"成对明智比较法"加权进行因子叠加分析,对连城县进行了城市建设用地生态适宜性评价研究.以"生态优先"为原则,按照先安排非建设用地,再安排建设用地的顺序,分析确定其用地的建设适宜性等级,对研究区划分"4区".依据评价结果,提出了城市用地向中心城区西部扩展的建议.

基于MCR模型的皖江城市带建设用地适宜性评价

以皖江城市带作为研究区域,选取面积大于100 000m^2的城市建设用地斑块作为研究扩展的源地,将评价指标具体到斑块这一微观尺度,探索不同因素对城市扩展的作用,并确定建设用地的扩展方向。研究利用最小累积阻力模型(MCR),选取地形、生态敏感性、景观类型、可达性四个阻力因子,利用最小累计阻力模型,构建建设用地扩展阻力面,生成建设用地适宜性分区图,并利用Arc GIS中最佳路径的算法得到建设用地扩展的最小耗费成本路径网,评价建设用地在空间分布上的适宜性,并在此基础上对建设用进行功能分区,为城市的发展提供科学的理论指导。研究结果表明:皖江城市带以中敏感性区域为主,主要分布在长江以北;扩展适宜性分区中主要是适宜扩展区和较适宜扩展区,主要分布在长江沿岸区域;建设用地扩展的最小路径网呈树状分布,研究区北部扩展成本较低,且扩展的路径相对较多。根据研究结果提供的参考,对芜湖市建设用地的规划具有重要意义,利于城市的科学布局,构建可持续发展社会。

三峡库区城镇建设用地生态适宜性纵横评价——以重庆市涪陵新区为例

城镇建设用地生态适宜性评价的目的在于协调城镇发展与环境保护之间的矛盾.三峡库区是典型的生态敏感区域,涪陵区地处三峡库区腹心地带,生态环境脆弱.以涪陵新区为例,在GIS栅格技术支持下,采用最小累积阻力模型(MCR)和多因素加权叠加法分别从水平和垂直生态过程的角度对山地城镇建设用地的生态适宜性进行评价,综合评价结果将涪陵新区划分为优先建设区、适度建设区、控制建设区、重点保护区、禁止建设区五个等级,分别占全区总面积的24.81%,42.70%,26.06%,4.23%和2.20%.从生态保护和经济发展的角度,为城镇发展用地的合理布局和科学评价提供有益尝试和补充.

地上地下工程建设地质环境适宜性一体化评价——以连云港城市规划区为例

工程建设地质环境适宜性评价是国土空间规划编制的基础。以江苏连云港城市规划区为例,探索地上地下工程建设适宜性一体化评价指标体系和方法。一体化评价是一个空间综合决策问题,涉及多个层次多种因素。借鉴经济领域的负面清单模式,基于自然因素的负面清单建立一体化评价指标体系。一体化评价地上和地下评价指标差异性较为明显,地上评价考虑地形坡度、地基承载力、桩基埋深等11因素,而地下空间评价则不考虑地形坡度、桩基埋深等因素。基于层次分析法与熵权系数法的综合评价方法来确定评价指标的权重,采用GIS平台采用多目标线性加权函数模型进行了工程建设一体化分区评价。评价结果显示:工程建设适宜性好区和较好区分布广泛,占比73.94%~93.22%。随着竖向深度增加,地下空间开发地质适宜性好的区域面积显著增加。地上空间适宜性主要受软土、腐蚀性土及地质灾害影响。浅层(0~15 m)地下空间开发地质适宜性主要受浅埋厚层软土的影响,地下空间开发面临软土变形的风险。次浅层(15~30 m)与次深层(30~50 m)地下空间开发地质适宜性主要受砂层涌水量和岩土结合面的影响。从评价结果看,地下空间工程建设适宜性优于地上,建议地下空间分为3个竖向分层进行开发,充分开发利用15 m以浅的地下空间,超前规划次浅层与次深层地下空间,工程建设应尽量避开适宜性一般区和差区。适宜性好区和较好区国土空间规划编制时应着重考虑。

基于ANP-GIS的长春市城市建设用地生态适宜性评价

基于城市建设用地的生态适宜性对建设用地资源进行合理有效开发利用是缓解城市化进程与土地资源有限性矛盾的根本途径。因此,在前人研究的基础上,提出了结合网络分析法(Analytic Network Process,ANP)与GIS的城市建设用地生态适宜性耦合评价模型,并结合长春市的自然、社会和经济特点对长春市城市建设用地生态适宜性进行案例研究,最终获得了可视化的长春市城市建设用地生态适宜性空间分布图(5个适宜度)。结果表明:对于长春市建设用地的选取最适宜的土地面积约为1 289.3km^2,适宜区域6 662.7km^2,较适宜区域9 461.4km^2,一般适宜区域2 848.2km^2,不适宜区域303.4km^2,而且长春市建设用地生态适宜性较高的地区(最适宜区域和适宜区域)分布在长春区域的腹地,处于长春市市区以及九台区、德惠市、农安县的交汇的区域,该地区自然、社会和经济各项指标的生态适宜性度均相对较高,表明长春市未来的城市发展以及城市建设的重点可以向生态适宜度较高的中部地区偏移。研究结果说明了ANP-GIS耦合模型的可靠性,同时也为长春市的建筑用地的选取和长春市的城市规划提供决策依据。

皖江城市带城镇建设用地综合评价与优化对策

以城镇建设用地为研究对象,以皖江城市带区县为评价单元,统筹考虑土地利用的"广度"和"深度",从土地利用的适宜性和集约性两维层面,采用象限法构建逻辑关系模型,对皖江城市带城镇建设用地进行综合评价,将整个皖江城市带划分为优化发展区、适度发展区、协调发展区、重点发展区4个类型区,提出土地利用的分区优化对策,为区域土地资源开发与利用、产业项目用地空间布局提供基础依据。

区域性城镇土地分等方法研究——以新疆生产建设兵团农垦城镇为例

在土地市场尚不发育，缺乏丰富的土地交易资料情况下，以地租理论和区位理论为依据，分析城镇土地综合质量影响因素，建立合理的分等指标体系，进行城镇土地分等是城镇土地有偿使用制度改革深化的重要基础。新疆生产建设兵团农垦镇土地分等的实践证明，这种分等方法是合理的和可行的．文中根据兵团农垦城镇土地综合质量指数，将兵团１６４个农垦城镇分为四等，为兵团农垦城镇土地宏观管理提供了科学依据，同时。