基于CASA模型的武汉市生态系统净初级生产力(NPP)遥感估算  

Remote sensing estimation net primary productivity( NPP) of ecosystem in Wuhan City using the CASA model

作　　者：陈涛 赵丽娅 侯邦飞 何超 CHEN Tao;ZHAO Liya;HOU Bangfei;HE Chao(Regional Development and Environmental Response Key Laboratory of Hubei Province,Faculty of Resources and Environmental Science,Hubei University,Wuhan 430062,China;The National Rey Laboratory of Drinking Water Source Management Technology,Shenzhen Environmental Science Research Institute,Shenzhen 518001,China;Institute of Atmospheric Composition,the Chinese Academy of Meteorological Sciences,Beijing 100081,China)

机构地区：[1]湖北大学资源环境学院,区域开发与环境响应湖北省重点实验室,湖北武汉430062 [2]深圳市环境科学研究院,国家环境保护饮用水水源地管理技术重点实验室,广东深圳518001 [3]中国气象科学研究院大气成分研究所,北京100081

出　　处：《湖北大学学报（自然科学版）》2018年第3期315-322,共8页Journal of Hubei University：Natural Science

基　　金：国家自然科学基金(31070370);湖北省教育厅重点项目(D2015003)资助

摘　　要：为研究快速城市化建设地区生态系统的NPP空间分布特征,基于LANDSAT-ETM遥感影像数据和3R空间分析技术,对CASA模型进行适当改进,构建武汉市NPP估算模型,估算武汉市2013年生态系统的净初级生产力.结果表明:1)武汉市生态系统NPP总量为154.22×10^(10)g C,总体呈现远城区远高于主城区的空间分布特征,土地利用类型中林地对NPP的贡献相对最大,其中7个主城区的NPP总量为5.38×10^(10)g C,6个远城区的NPP总量为141.64×10^(10)g C,约为主城区的26倍;2)全市13个区中,NPP总量权重排名前6的区均为远城区,黄陂区植被净生产量最高(45.46×10^(10)g C),江汉区最低(0.32×10^(10)g C),两者相差142倍之多;3)单位面积NPP空间上呈现中央区域低、四周区域高的雷达辐射状的分布特征,全市生态系统单位面积平均NPP为179.76×106g C/km2,其中主城区单位面积NPP约为56×106g C/km2,远城区单位面积NPP约为186×106g C/km2,约为主城区的3.3倍;4)武汉市13个区的单位面积NPP按照大小进行排列,黄陂区>蔡甸区>新洲区>东西湖区>江夏区>汉南区>武昌区>江汉区>青山区>硚口区>江岸区>汉阳区>洪山区.研究建议武汉市远城区应注重生态农业、生态旅游业发展,主城区应高度重视生态环境保护,采取立体化、多维度的方式修建生态空间,加大生态修复力度,逐步提高城市绿地占比,为市民创造更为舒适的居住环境.For studying ecological system NPP spatial distribution characteristics of rapid urbanization region,based on the LANDSAT-ETM remote sensing data and spatial analysis technology,the work improved CASA model,builded the NPP estimation model in Wuhan,estimated the net primary productivity of Wuhan and 13 districts in 2013.Results showed that:1)ecosystem NPP total of Wuhan was 154.22×10 10 gC,generally the regions of far away city far more than central downtown,in land using types,the woodland contributed relatively largest to the NPP,NPP total of seven central downtown was 5.38×10 10 gC,NPP total of six regions of far away city was 141.64×10 10 gC,about 26 times of central downtown;2)In 13 districts,NPP total weight of the top six areas were far away city,NPP of Huangpi district was highest(45.46×10 10 gC),NPP of Jianghan district was lowest(0.32×10 10 gC),both differ 142 times as much;3)NPP per unit area on the space appeared that the central area was low and surrounding area was high,the regions of far away city far more than central downtown,ecological system of Wuhan average NPP per unit area is 179.76×10 6 gC/km 2,of which NPP per unit area of central downtown was about 56×10 6 gC/km 2,NPP per unit area of far away city was about 186×10 6 gC/km 2,about 3.3 times the city of central downtown;4)According the NPP per unit area of 13 districts in Wuhan to the size,Huangpi district>Caidian district>Xinzhou district>Dongxihu>Jiangxia district>Hannan district>Wuchang district>Jianghan district>Qingshan district>Qiaokou district>Jiangan district>Hanyang district>Hongshan district.Research suggested that far away city of Wuhan city should pay attention to develop ecological agriculture and ecological tourism,the central downtown should attach great importance to ecological environment protection,adopt the method of three-dimensional and multi-dimensional to construct ecological space,increase the intensity of ecological restoration,improve the urban green space ratio,to create more comfortable living environmen

关 键 词：CASA模型 生态系统 净初级生产力 武汉市 NPP 

分 类 号：P964[天文地球—自然地理学] X87[环境科学与工程—环境工程]