Analysis on the Application of Quality Classification of Cultivated Land Resources in Municipal Land Space Planning:A Case Study of Chongzuo City

Cultivated land is the most important strategic resource to ensure food security.The newly constructed quality classification system of cultivated land resources considers the cultivated land health index for the first time.How the new classification and grading index system and the quality classification results of cultivated land resources to effectively guide the preparation of municipal land space planning has become a key research direction.This paper expounds the overall design idea for quality classification of cultivated land resources and classification index system.Taking Chongzuo City as an example,through the analysis of the quality classification results of cultivated land resources in the study area,using GIS spatial analysis and factor pairwise comparison method,this paper explores the application ideas and methods of quality classification research results of cultivated land resources in the formulation of cultivated land retention target,the delineation of dominant areas of cultivated land protection,the delineation of three control lines,the comprehensive improvement of land,and ecological restoration zoning in the municipal land space planning.

Exploration and Innovation of Village Planning Compilation Based on the Background of Land Space Planning

Compilation work of land space planning at village level is important point in promoting the strategy of rural revitalization and the key for specific implementation of land space planning.Based on analyzing the existing problems in the planning at village level in China,overall guidelines and specific measures of land space planning compilation at village level are proposed,and some thoughts and suggestions on how to perfect its legal status,considering regional characteristics and valuing landscape design are put forward.

Coordinated development of land multi-function space: An analytical framework for matching the supply of resources and environment with the use of land space for ecological protection, agricultural production and urban construction

Based on the carrying capacity of the resources and the environment,this article defines the connotation of the land multifunctional space(LMFS)from three aspects,ecological protection,agricultural production and urban construction,in the new era of land space planning system.Moreover,a framework is constructed for the coordinated development of the multi-functional oriented space to match the use of land space(ULS)with the supply of resources and environment(SRE).Based on this,the technology and methods of comprehensive evaluation,dominance recognition,and matching relationship division functions of the use of land space(FULS)and functions of the supply of resources and environment(FSRE)are discussed.The advantageous functions of the use of land space(AFULS)and advantageous functions of the supply of resources and environment(AFSRE)are also identified in the study area.A LMFS coordinated development system integrating“function position-comprehensive partition-regulation strategy”is proposed.Through the empirical study of Shandong province,we found that,first,the FULS of ecological protection space in the province is mainly found in high value areas,and the FSRE is mainly in low value areas,which has certain complementarity in the space.The FULS of agricultural production space is mainly observed in high value areas,the FSRE is mainly in middle value areas,and the spatial distribution is balanced and staggered.The FULS of the urban construction space and the FSRE are mainly in middle values areas,and the spatial distribution is basically similar.Second,the FULS in the study area is dominated by the single advantage of agricultural production and urban construction,while the FSRE has a relatively balanced distribution of the advantages of ecological protection,single agricultural production and compound advantages of agricultural production and urban construction,and urban construction and ecological protection.The matching between the two is mainly at high and middle levels.Specifically,70%of the province’s land space still has a certain development and utilization potential,and 30%of ULS intensity is close to or exceeds the resource and environment carrying capacity.Third,considering the comprehensive impact of resource endowment,social and economic development and policy and institutional environment on different matching relationships,this paper constructs the land spatial development strategic pattern of“two screens-seven regions-multicore”positioning and“four regions-eight categories”hierarchical area of Shandong at the macro level,and puts forward a differentiated land space development strategy.

Spatio-temporal pattern changes of land space in Hengduan Mountains during 1990–2015

Hengduan Mountains offer land space for a variety of ecological services. However, the sustainable development and management of land space has been challenged by increased human activities in recent years. This paper performs the spatial pattern analysis of the quantitative and structural changes of various landscapes at different altitudes, and uses the land use data in 1990, 2000, 2010 and 2015 to reveal how various land patterns have changed. The results show that, within the production-living-ecological space schema, the ecological space dominates Hengduan Mountains, while the production and living space was mainly distributed in south region. During 1990-2015, the production-living-ecological spatial changes had been gradually accelerated and the regional differences had become more prominent. The agricultural production space had continuously decreased by 1132.31 km^2, and the industrial and mining production space had rapidly increased by 281.4 km^2 during 1990-2015. The living space had steadily increased, and the ecological space had increased with fluctuations. The land space pattern in Hengduan Mountains was greatly restricted by the terrain, such as altitude and slope. The implementations of China Western Development Strategy and the Returning Farmland to Forest Program had favorably promoted the changes of land spatial pattern in Hengduan Mountains.

RESEARCH ACTIVITIES ON LAND USE/COVER CHANGE IN THE PAST TEN YEARS IN CHINA USING SPACE TECHNOLOGY

Land use/cover change, which in China is characterized by urbanization resulting in a decrease in arable land in the east along with a large area of grassland being cultivated in the west, has been accelerated by rapid economic development in the last years. All of the above changes will affect sustainable development in the next century. The Chinese Academy of Sciences is conducting a study of land use/cover change over the last ten years based on the integration of remote sensing and GIS technology to establish a multitemporal database covering all of China. Fundamental data for land use/cover for the year 1996 has already been developed by the Chinese Academy of Sciences. In order to reconstruct fundamental land use/cover data for the year 1986, a central data processing and analyzing system and a regional data acquisition, processing and analyzing system have been established and are joined together as a network. After the 1986 database is established, the comparative research on the reduction in arable land, urbanization, desertification, changes in forest and grassland, and lake and wetland land use/cover change will be carried out. In addition, a transect for a key regional comparative study was selected along the Changjiang (Yangtze) River. The driving forces of these changes also will be extracted. The result of this study will be not only make a contribution to global land use/cover change research, but will also support decision making for sustainable national development.

The theory and method research on the double evaluation of land and space:A survey

By reviewing the theories and methods of resource and environmental carrying capacity evaluation and suitability evaluation of land and space development,it provides theoretical and technical support for rational layout and optimization of land and space development pattern.From the aspects of resource carrying capacity,environmental carrying capacity,the importance of ecological protection,the suitability of agricultural production,and the suitability of urban construction,we sort out domestic and foreign documents.The evaluation of resource carrying capacity has changed from single-factor evaluation to multi-factor comprehensive evaluation.At present,the optimization of land use pattern based on the“three-generation”space is still under exploration,it is not enough to systematize and summarize the thought of optimizing the spatial pattern of the national territory.The theoretical framework,model,method and index of“dual evaluation”of territorial space need to be improved continuously,it also needs the scientific analysis and cognition from the natural direction to the human location direction and the spatial equilibrium state as the new driving force.

Agricultural Land Suitability of Production Space in the Taihang Mountains, China

The contradiction between the shortage of land for agriculture due to rapid expansion of industrialization and urbanization and increasing population pressure is projected to impose great threats to future food security.Agricultural land suitability evaluation is an effective approach to improve the utilization of land resources for crop production and thus enhance the capacity of food provision.In this study, we evaluated the land suitability for agriculture of the production space in the Taihang Mountains by three steps: establishing indicator system, determining weights for indicators, and constructing a fuzzy matter-element model to assess the grades of suitability.Results showed that the land suitability had a significant linear correlation with potential crop yields, indicating our evaluation was effective to predict crop production.The spatial pattern of land suitability for crop production demonstrated that land with higher suitability was generally located in piedmont plains and basins, while land with lower suitability was mostly situated in mountainous areas.The area of highly, moderately, marginally suitable and unsuitable land for agriculture was 32.13%, 28.58%, 37.49% and 1.80% of the production space, respectively.However, the correlation degree analysis indicated that the requirements of these four suitability grades were currently not satisfied but could be potentially fulfilled.In terms of indicator weights, soil properties were much more important than topography and location conditions to influence the grades of suitability.Among all indicators, slope, soil organic matter, soil texture and soil depth were the most influential factors, so slope farming prevention and organic fertilization were most likely to improve land suitability for agriculture.Compared the outputs of our land suitability evaluation model with the distribution of the existing croplands, we found that about 66.52% of marginally suitable and 54.55% of unsuitable land for agriculture were currently used for croplands.Therefore, de-farming policy should be implemented in areas of these two suitability grades.In contrast, cropland expansion was encouraged in the land that was highly or moderately suitable for agriculture.Our evaluation of agricultural land suitability is beneficial for future land use planning and decision-making in the Taihang Mountains.

Planning Strategy of Tourism Service Towns under the Land and Space Planning System:A Case Study of Taiping Town in Nanchang City

In May 2019,the construction of the land and space planning system was officially launched.The Ministry of Natural Resources of the State Council issued the Notice on Comprehensively Implementing Land and Space Planning,which clearly requires all regions to comprehensively launch the land and space planning and puts forward specific work requirements[1].Later,in order to guide the preparation and implementation of land and space planning,various technical standards were successively issued.The dual-assessment technical guidelines,land use classification standards,and the compilation guidelines for provincial,city and county planning were gradually submitted for review and trial implementation.In this context,there have been more and more planning theories and practical studies based on the background of land and space planning.For tourist service towns,how to protect the style and features of the towns under the land and space planning system and preserve the local characteristics is a problem that needs to be solved urgently[2].

The Primal Exploration of Space launch and Manned Lunar-landing

The lunar-landing is the continuity of manned spaceflight engineering. Comparing with the manned spacecraft engineering, it requires more reliability , larger scale, and more funds. On the basis of China’s achievements and the experiences of foreign countries, the paper brings forward the idea that using the existing transportation technology to send the launch vehicles and cosmonauts to the near-earth orbit in batches, assembling the components together on the space-launch platform, and then launching them to the moon to fulfill our dream of manned landing on the moon. The paper also discusses the space launch platform and the launching ways.

济南市章丘区乡村传统集市人地空间耦合研究

乡村传统集市作为乡村基础公共服务设施的核心要素之一,是推动城乡融合、人地耦合发展的重要支撑点。以济南市章丘区乡村传统集市为研究对象,在梳理章丘区乡村传统集市人地空间时空脉络的基础上,从集地、集期和集文要素出发构建乡村传统集市人地耦合评价体系,定量解析集市人地空间的耦合特征,提出集地服务体系中心和边缘的等级特征、集期时空布局趋近和分离的高效特征、集文历史遗存封闭与开放的传承特征。根据评价结果,针对章丘区乡村传统集市人地空间存在的矛盾提出了集地空间分布与体系的均衡优化、集期时空协调与交错的高效优化、集文遗产传承与延续的价值优化等空间策略。

基于Landsat 8影像的公园地表温度与植被指数时空变化特征研究--以武汉市青山公园为例

[目的]研究城市公园对环境温度的调节作用以及地表温度与植被覆盖的关系。[方法]以武汉市青山公园为研究对象,通过2013、2015、2018年夏季3期Landsat 8遥感影像反演出地表温度和归一化植被指数(NDVI),利用ArcGIS软件提取公园绿地对应的地理信息数据,对地表温度和NDVI的时空变化特征及相关性进行分析。[结果]2013—2018年青山公园NDVI从0.30下降至0.25,地表温度分级中温区减少,低温区和高温区增加,且地表温度和NDVI呈现出明显的负相关,其中2018年最为明显,回归函数为y=-17.229x+34.107(R^(2)=0.5605)。[结论]该研究为武汉及其他城市绿地规划管理提供理论依据。

流域国土空间水资源承载力评价及保护方法研究

量化测度水资源承载力并制定相应的水资源保护措施,对于区域国土空间可持续发展极为重要。运用DPSIR框架,评价了梁子湖流域的水资源承载力,并对评价结果进行空间落位。基于评价结果,使用FLUS模型模拟未来发展趋势,划定了区域国土空间功能优势区,并综合评价模拟结果,确定了梁子湖流域的水环境保护格局。从量化测度和情景模拟两个方面构建了一套切实可行的流域国土空间水资源保护规划技术路径,可为区域水资源保护目标导向下国土空间规划与生态保护提供参考。

无人经济趋势下的未来城市空间创新与规划应对

聚焦无人化趋势下的城市新型人地关系,结合无人化趋势带来的业态创新和就业模式变化,推演未来可能出现的无人化场景及其对规划技术提出的新挑战,由此得出如下新趋势并提出相应的规划应对设想:在无人化趋势下,以人定地的空间规模预测方式的适用性会降低,需要在系统考虑机器换人对各类用地影响的基础上确定城镇空间发展规模;无人化生产和劳动力替代将在一定程度上重构现有的产城空间格局,未来需要加强对无人化产业空间的学术研究和规划技术研究;未来城市会出现大量“人—机”共存交互的空间场景并产生相应的治理难题,急需从时空行为活动导控方面探索提升建成空间利用效率的规划新理论和新方法。

基于“三生”空间的湖南省土地利用格局及多功能演变

为了增强土地的多功能性,缓解土地资源紧张和功能性较弱等问题。该研究基于“三生”空间视角,通过“要素-结构-空间-功能”的土地利用多功能机制,构建多功能评价指标体系,采用熵值法和TOPSIS法对其土地利用多功能水平进行评价。同时借助ArcGIS软件,采用土地利用空间转移模型、土地利用动态度等空间分析方法对该区域2000—2020年土地利用格局演变特征进行分析。最后基于“空间+功能”的双视角探析土地利用空间格局演变与功能转变之间的动态关系。结果表明:1)2000—2020年湖南省土地利用“三生”空间格局演变波动较大,生产空间与生态空间收缩,生活空间扩张;其中又以生活空间扩张显著,生产空间与生态空间之间转换较为频繁为主要特点,是造成湖南省土地利用“三生”空间波动重组的主要因素。2)区域分布格局,生产空间主要分布于省北部的常德、益阳、岳阳以及中部衡阳、娄底、邵阳、永州4市交界的中心区域;生活空间主要分布于以长株潭城市群为中心的核心分布区以及各市城市中心区域;生态空间分布面积最广,主要分布于省西部及西南部丘陵山地区域,以及位于省北部的洞庭湖水域区等;区域变化以环长株潭区域土地利用格局演变更剧烈,其次是东、西、南三面山地区域;动态度结果显示全省土地利用总体动态变化率有提升态势。3)2000—2020年土地利用“三生”功能水平呈现逐年递增趋势,生态功能评分最高,变化最明显,生产功能次之,波动中水平趋于稳定,生活功能最低,呈逐年提升趋势;区域间水平差异由低水平高差距向高水平的相对均衡转变。4)土地利用空间格局变化与功能转变之间具有较大的关联性,尤其在时序变化上呈现一定的变化规律,最后基于“空间+功能”的土地利用多功能机制,对两者关系进行了一次有益尝试。在“一对多”机制关系研究中,未来需要结合土地多功能测度方法更加准确识别“三生”空间和功能之间的相互关系。

重庆市中心城区非集中建设区规划策略研究

非集中建设区是国土空间规划的重要区域,也是落实全域全要素规划治理的重要空间载体。针对非集中建设区存在的权属复杂多元、要素庞杂多元、管理主体多元的空间特征,以重庆市中心城区为例,提出非集中建设区国土空间规划策略:针对多元的特点,统筹谋划空间发展目标,构建非集中建设区国土空间规划体系;通过分级分区编制管理,将“多元”要素管控要求逐层传导落实;通过多规协同治理,充分发挥“多元”主体能动作用。

“三生”空间视角下苏南水网乡村景观生态风险评价——以石头潭片区为例

苏南水网乡村是新型城镇化建设的先行区,然而快速经济建设对“三生”空间景观格局造成较大干扰,引发的景观生态风险变化值得关注。研究以苏州市石头潭片区为例,选取1990、2000、2010、2020年4期土地利用数据,基于景观格局指数构建景观生态风险评价模型,定量分析研究区“三生”空间景观生态风险时空分异特征。结果表明,1)1990-2020年石头潭片区“三生”空间面积变化显著。生态空间面积稳步增加;农业生产空间面积逐年缩减;工业生产空间、城镇生活空间与农村生活空间扩张显著。“三生”空间类型转移以农业生产空间转向城镇生活空间与工业生产空间为主。2)研究区“三生”空间与景观生态风险存在关联性,高风险区主要分布于澄湖等水域生态空间,中风险区主要为沿湖荡分布的农业生产空间与农村生活空间,低风险区多为成片聚集分布的城镇生活空间与工业生产空间。1990-2020年石头潭片区景观生态风险等级不断上升,较高、高风险区面积逐步扩张,面积占比分别上升14.43%、7.50%。3)石头潭片区景观生态风险存在显著空间正相关性;生态风险指数空间分布以高-高与低-低聚集为主,空间分异特征明显。

基于粒子群的旧工业建筑再利用空间优化算法

为了解决土地资源紧张的问题,优化旧工业建筑空间,提高建筑利用空间紧密度,实现空间再利用,提出基于粒子群的旧工业建筑再利用空间优化算法。将土地利用适宜性最大化、用地紧凑度最大化和转化成本最小化作为优化目标,构建空间优化模型,建立旧工业建筑再利用空间优化目标函数,在相关条件的约束下采用粒子群算法求解上述目标函数,实现旧工业建筑再利用空间的优化。仿真结果表明,所提方法的地类转换成本低,总适宜度、生态协调性和社会效益高,空间紧凑度高,优化效率高。

“三生”空间视角下土地利用功能演变与障碍诊断——以新一线城市南京市为例

基于“三生”空间视角构建土地利用多功能评价指标体系,运用改进的熵权TOPSIS法评价新一线城市南京市的土地利用多功能及其时变特征、权衡协同关系与障碍因素等,得到的结果显示:南京市在研究期间内土地利用多功能呈倒U型变化趋势,其中生产功能和生活功能提高,生态功能呈衰退态势;南京市土地生产、生活、生态功能空间存在程度不一的协同权衡关系;土地生产功能与生态功能的障碍度持续增大,其中SO 2年均浓度、森林覆盖率影响较突出,生活功能的障碍度持续减小。因此新一线城市应在权衡土地生活、生产与生态功能协同关系中强化土地生态空间服务功能,减少生活与生产活动带来的生态负效应,引导土地功能向高度协调方向演化。

基于混合用地模式识别的济南市老城区典型片区绿色空间降温效应分析

城市绿色空间可以通过生态系统服务调节功能有效缓解城市热岛效应,降低高温健康胁迫风险。城市中心城区特别是老城区建成环境具有高度异质性,复杂建成环境中绿色空间的降温效应,特别是混合用地模式中绿色空间的降温强度、阈值、形状等还需进一步明晰。在厘清城市热环境影响因素和绿色空间降温机制基础上,构建了“冷热岛分析提取-混合用地模式聚类识别-混合用地模式热效应分析-典型绿色空间降温效应分析”的研究框架。针对当前城市绿地指标失实、结构失衡、功能失调等现实问题,选择济南市老城区典型片区进行实证研究,重点分析了中层建筑混合用地模式中绿色空间的降温强度、降温面积阈值、形状及植被覆盖度等,总结了具有高降温效能的绿色空间模式,为促进城市健康人居环境发展提供借鉴。

县域视角下土地与人口城镇化协调度时空特征研究——以河北省为例

以河北省县域为研究单元,选取2003、2014和2022年数据,建立土地与人口城镇化协调度指数,对河北省土地与人口城镇化协调度时空特征和影响因素进行研究。结果表明:(1)近二十年来河北省土地与人口城镇化水平呈现持续上升的趋势,二者协调性逐渐提高,由失调类提高到了过渡类,县域间协调性发展不均衡,但差异逐渐缩小。(2)土地与人口城镇化协调度具有一定的空间聚集趋势,且越来越明显,张家口始终是热点区,唐山为新增热点区,保定始终是冷点区,且有明显扩张趋势。