天津市滨海地区裸露地风蚀盐尘排放量计算

Calculation of salt dust emissions from bare land in coastal area of Tianjin

以天津市滨海地区为研究对象,2018年为基准年,通过遥感卫星影像解译裸露地分布特征,利用排放系数模型计算天津市滨海地区裸露地风蚀盐尘:总悬浮颗粒物(TSP)、PM 10、PM 2.5、盐分的年排放量,建立不同功能区裸露地风蚀盐尘排放清单。研究表明,天津市滨海地区裸露地分布面积较大,主要集中连片分布在5个沿海功能区范围内,主要功能区裸露地面积合计240.37 km 2,各类颗粒物排放量分别为:TSP为32372.08 t/a,PM 10为2913.49 t/a,PM 2.5为83.71 t/a,盐分为1804.87 t/a。从各主要功能区来看,南港工业区、临港经济区、中新生态城裸露地风蚀盐尘排放量大,主要原因是裸露地面积大。本研究为天津市滨海地区开展裸露地生态治理和生态规划提供了理论依据和技术支持。

The coastal area of Tianjin was taken as the research area.The year of 2018 was used as the base year to interpret the distribution characteristics of the bare land through remote sensing satellite imagery.The emission coefficient model was used to calculate the wind erosion salt dust:total suspended particulate matter(TSP),PM 10,PM 2.5 and salinity emissions.This study established an inventory of salt dust emissions in bare land of different functional areas.Results showed that the area of bare land in coastal area of Tianjin was relatively large and mainly distributed in five coastal functional areas.The area of the main functional areas bare land in the coastal area was 240.37 km 2 in total.The emissions of various types of particulate matter were:TSP 32372.08 t/a;PM 102913.49 t/a;PM 2.583.71 t/a;salinity 1804.87 t/a.From the perspective of the main functional areas,the Nangang Industrial Zone,Lingang Economic Zone,and the China-Singapore Tianjin Eco-city had large amounts of wind-eroded salt dust emissions due to the large area of bare land.This study provided theoretical basis and technical support for the ecological management and ecological planning of bare land in coastal area of Tianjin.