马鞍山市城市森林碳储量及分布格局研究

应用遥感技术结合样地调查的方法,估算马鞍山市城市森林斑块的储碳及其分布的格局,研究区面积为340 km2。结果表明,城市森林生物量与从LandSAT5 TM(2010年7月)图像中提取归一化植被指数(NDVI)之间有很好的相关性,可用回归方程y=123.02x1.076 1来描述,同时分别建立了不同类型城市森林生物量与NDVI的关系,应用这些方程计算得出研究区中11 477.07 hm2的城市森林斑块的生物量计5.748×105t,碳储量2.874×105t;其中郊区水源涵养林和建成区市郊风景林总储碳1.496×105t,占全部储碳的52.0%;城市公园的树林储碳2.567×103t,占0.9%;行道树储碳3.530×103t,占1.2%;其他类储碳量1.317×105t,占45.8%。另外,从马鞍山市的NDVI分布推导出生物量的分布特点。

Appraisal of carbon storage in urban forest patches and its distribution pattern in Maanshan city

In this paper,GIS technology combined with sample investigation in the field was employed to investigate carbon(C) storage of urban forest patches in Maanshan city,well-known as an iron and steel industrial city,and the distribution pattern of carbon storage was mapped as well.The study area covered 340 km2.The re-sults showed that there was a significant relationship(y = 123.02x1.0761) between the biomass of urban forest stand and NDVI(normalized difference vegetation index) drawn from TM image of LandSat5(July of 2010).In the urban forest with area of 11477.07 hm2,the forest C storage was 2.874×105 t,of which 52%(1.496×105 t) was stored in the water conservation forest located in suburban and hill areas in the building-up areas,0.9%(2.567×103 t) in the parks,1.2%(3.530×103 t) in the street trees,and 45.8%(1.317×105 t) in the other land types.The distribution pattern diagram of carbon storage of urban forest in the city was inferred.