Numerous emerging development areas worldwide are receiving attention;however,current research on land use change simulation primarily concentrates on cities,urban clusters,or larger scales.Moreover,there is a limited...Numerous emerging development areas worldwide are receiving attention;however,current research on land use change simulation primarily concentrates on cities,urban clusters,or larger scales.Moreover,there is a limited focus on understanding the impact of regional connectivity with surrounding cities and policy factors on land use change in these new areas.In this context,the present study utilizes a cellular automata(CA)model to investigate land use changes in the case of Nansha New District in Guangzhou,China.Three scenarios are examined,emphasizing conventional locational factors,policy considerations,and the influence of regional connectivity with surrounding cities.The results reveal several key findings:(1)Between 2015 and 2021,Nansha New District experienced significant land use changes,with the most notable shifts observed in cultivated land,water area,and construction land.(2)The comprehensive scenario exhibited the highest simulation accuracy,indicating that Nansha New District,as an emerging area,is notably influenced by policy factors and regional connectivity with surrounding cities.(3)Predictions for land use changes in Nansha by 2030,based on the scenario with the highest level of simulation accuracy,suggest an increase in the proportion of cultivated and forest land areas,alongside a decrease in the proportion of construction land and water area.This study contributes valuable insights to relevant studies and policymakers alike.展开更多
Nansha wetland plays a crucial role in ecological balance of the Pearl River Delta or even Guangzhou. The research, based on researches available, analyzed ecological benefits of Nansha wetland and proposed protection...Nansha wetland plays a crucial role in ecological balance of the Pearl River Delta or even Guangzhou. The research, based on researches available, analyzed ecological benefits of Nansha wetland and proposed protection measures in order to better protect urban wetlands and achieve sustainable development of ecological resources of Nansha wetland.展开更多
海岸线由于受陆海交互影响,其形态与功能的变化复杂。近些年,遥感技术和地理信息系统(Geographic Information System,GIS)的广泛应用为研究海岸线提供了重要基础。本文基于多源数据,以南沙湾周边区域为样本区,将人机交互目视解译法和...海岸线由于受陆海交互影响,其形态与功能的变化复杂。近些年,遥感技术和地理信息系统(Geographic Information System,GIS)的广泛应用为研究海岸线提供了重要基础。本文基于多源数据,以南沙湾周边区域为样本区,将人机交互目视解译法和聚焦剖面法运用于不同类别海岸线的提取,并重点分析南沙区8个时期海岸线的时空演变。结果表明:聚焦剖面法对于自然岸线的识别更具科学性,而基于无人机正射影像和快鸟卫星(QuickBird)影像,运用人机交互目视解译法能够更加贴合实际情况。对于分辨率较低的卫星影像,可结合两种方法提取人工岸线。从南沙区海岸线的数据分析显示,1990—1995年、2005—2012年海岸线长度变化最剧烈;2012年之前海岸线向海域快速拓展,围填海区域快速增加,后期逐渐降速至相对稳定。南沙区海岸线时空变迁与不同发展阶段人类活动干扰高度关联。在农业发展阶段,万顷沙的联围工程推动岸线向南拓展;在工业发展阶段,龙穴岛等区域的开发导致岸线进一步向海扩张;在新城营造阶段,生态修复岸线增长,局部岸线向内陆收缩,岸线利用趋于精细化。展开更多
基金This research received was funded by the National Natural Science Foundation of China(Grant No.42271217)the Guangdong Planning Office of Philosophy and Social Science(Grant No.GD21CGL15).
文摘Numerous emerging development areas worldwide are receiving attention;however,current research on land use change simulation primarily concentrates on cities,urban clusters,or larger scales.Moreover,there is a limited focus on understanding the impact of regional connectivity with surrounding cities and policy factors on land use change in these new areas.In this context,the present study utilizes a cellular automata(CA)model to investigate land use changes in the case of Nansha New District in Guangzhou,China.Three scenarios are examined,emphasizing conventional locational factors,policy considerations,and the influence of regional connectivity with surrounding cities.The results reveal several key findings:(1)Between 2015 and 2021,Nansha New District experienced significant land use changes,with the most notable shifts observed in cultivated land,water area,and construction land.(2)The comprehensive scenario exhibited the highest simulation accuracy,indicating that Nansha New District,as an emerging area,is notably influenced by policy factors and regional connectivity with surrounding cities.(3)Predictions for land use changes in Nansha by 2030,based on the scenario with the highest level of simulation accuracy,suggest an increase in the proportion of cultivated and forest land areas,alongside a decrease in the proportion of construction land and water area.This study contributes valuable insights to relevant studies and policymakers alike.
文摘Nansha wetland plays a crucial role in ecological balance of the Pearl River Delta or even Guangzhou. The research, based on researches available, analyzed ecological benefits of Nansha wetland and proposed protection measures in order to better protect urban wetlands and achieve sustainable development of ecological resources of Nansha wetland.
文摘海岸线由于受陆海交互影响,其形态与功能的变化复杂。近些年,遥感技术和地理信息系统(Geographic Information System,GIS)的广泛应用为研究海岸线提供了重要基础。本文基于多源数据,以南沙湾周边区域为样本区,将人机交互目视解译法和聚焦剖面法运用于不同类别海岸线的提取,并重点分析南沙区8个时期海岸线的时空演变。结果表明:聚焦剖面法对于自然岸线的识别更具科学性,而基于无人机正射影像和快鸟卫星(QuickBird)影像,运用人机交互目视解译法能够更加贴合实际情况。对于分辨率较低的卫星影像,可结合两种方法提取人工岸线。从南沙区海岸线的数据分析显示,1990—1995年、2005—2012年海岸线长度变化最剧烈;2012年之前海岸线向海域快速拓展,围填海区域快速增加,后期逐渐降速至相对稳定。南沙区海岸线时空变迁与不同发展阶段人类活动干扰高度关联。在农业发展阶段,万顷沙的联围工程推动岸线向南拓展;在工业发展阶段,龙穴岛等区域的开发导致岸线进一步向海扩张;在新城营造阶段,生态修复岸线增长,局部岸线向内陆收缩,岸线利用趋于精细化。