尝试结合夜间灯光遥感数据(NPP-VIIRS)和POI数据,去识别深圳市的城市中心。首先,通过实验确定了多分辨率分割的最佳参数并确立了统一的空间单元计算POI的密度;其次,通过计算Anselin Local Moran′s I结合人类活动密度把高-高聚类单位定...尝试结合夜间灯光遥感数据(NPP-VIIRS)和POI数据,去识别深圳市的城市中心。首先,通过实验确定了多分辨率分割的最佳参数并确立了统一的空间单元计算POI的密度;其次,通过计算Anselin Local Moran′s I结合人类活动密度把高-高聚类单位定义为城市主中心,并使用地理加权回归模型根据POI密度的平方根与分割单元的几何中心到城市主中心的加权距离来确定子中心,识别出了2个城市主中心和11个城市子中心;最后通过与传统识别城市中心的方法进行对比分析。结果表明:多尺度分割、Anselin Local Moran′s I与地理加权回归结合的方法更好。展开更多
Urban underlying surface has been greatly changed with rapid urbanization, considered to be one of the major causes for the destruction of urban natural hydrological processes. This has imposed a huge challenge for st...Urban underlying surface has been greatly changed with rapid urbanization, considered to be one of the major causes for the destruction of urban natural hydrological processes. This has imposed a huge challenge for stormwater management in cities. There has been a shift from gray water management to green stormwater management thinking. The green stormwater infrastructure (GSI) is regarded as an effective and cost-efficient stormwater management eco-landscape approach. China's GSI practice and the development of its theoretical framework are still in the initial stage. This paper presents an innovative framework for stormwater management, integrating green stormwater infrastructure and landscape security patterns on a regional scale based on an urban master plan. The core concept of green stormwater infrastructure eco-planning is to form an interconnected GSI network (i.e., stormwater management landscape security pattern) which consists of the location, portion, size, layout, and structure of GSI so as to efficiently safeguard natural hydrological processes. Shanghai Lin- gang New City, a satellite new town of Shanghai, China was selected as a case study for GSI studies. Simulation analyses of hydrological processes were carried out to identify the critical significant landscape nodes in the high- priority watersheds for stormwater management. GSI should be planned and implemented in these identified landscape nodes. The comprehensive stormwater manage- ment landscape security pattern of Shanghai Lingang New City is designed with consideration of flood control, stormwater control, runoff reduction, water quality protec- tion, and rainwater utilization objectives which couldprovide guidelines for smart growth and sustainable development of this city.展开更多
文摘尝试结合夜间灯光遥感数据(NPP-VIIRS)和POI数据,去识别深圳市的城市中心。首先,通过实验确定了多分辨率分割的最佳参数并确立了统一的空间单元计算POI的密度;其次,通过计算Anselin Local Moran′s I结合人类活动密度把高-高聚类单位定义为城市主中心,并使用地理加权回归模型根据POI密度的平方根与分割单元的几何中心到城市主中心的加权距离来确定子中心,识别出了2个城市主中心和11个城市子中心;最后通过与传统识别城市中心的方法进行对比分析。结果表明:多尺度分割、Anselin Local Moran′s I与地理加权回归结合的方法更好。
文摘Urban underlying surface has been greatly changed with rapid urbanization, considered to be one of the major causes for the destruction of urban natural hydrological processes. This has imposed a huge challenge for stormwater management in cities. There has been a shift from gray water management to green stormwater management thinking. The green stormwater infrastructure (GSI) is regarded as an effective and cost-efficient stormwater management eco-landscape approach. China's GSI practice and the development of its theoretical framework are still in the initial stage. This paper presents an innovative framework for stormwater management, integrating green stormwater infrastructure and landscape security patterns on a regional scale based on an urban master plan. The core concept of green stormwater infrastructure eco-planning is to form an interconnected GSI network (i.e., stormwater management landscape security pattern) which consists of the location, portion, size, layout, and structure of GSI so as to efficiently safeguard natural hydrological processes. Shanghai Lin- gang New City, a satellite new town of Shanghai, China was selected as a case study for GSI studies. Simulation analyses of hydrological processes were carried out to identify the critical significant landscape nodes in the high- priority watersheds for stormwater management. GSI should be planned and implemented in these identified landscape nodes. The comprehensive stormwater manage- ment landscape security pattern of Shanghai Lingang New City is designed with consideration of flood control, stormwater control, runoff reduction, water quality protec- tion, and rainwater utilization objectives which couldprovide guidelines for smart growth and sustainable development of this city.