浙江省人为源氨排放清单建立及分布特征

Establishment and Spatial Distribution of Anthropogenic Ammonia Emission Inventory in Zhejiang Province

通过收集各类氨排放源的活动水平数据,选取合适的排放因子以及估算方法,建立了2017年浙江省人为源氨排放清单,分析各排放源的排放分摊率以及浙江省各市的排放情况,并利用ArcGIS对浙江省氨排放量和排放强度的空间分布进行分析.结果表明,2017年浙江省人为源氨排放量为122.00 kt,以农业源排放为主,其中农田生态系统氨排放量最高,达到36.06 kt,并以氮肥施用贡献最大(87.12%);其次是禽畜养殖,占到人为源氨排放总量的29.44%.非农业源中废物处理和人体排放源贡献最大,分别占到非农业源氨排放量的44.07%和28.49%.2017年杭州市氨排放量最高,占浙江省氨排放总量的17.83%;但嘉兴市的氨排放强度最大,达到3.82 t·km^-2.从空间分布来看,氨排放量主要集中在浙江省北部和东南部,而浙江省北部和东北部的氨排放强度相对较高.

The ammonia emissions inventory of Zhejiang Province was established in 2017 using the activity data of various ammonia emission sources,emission factors,and an estimation method.Ammonia emissions for each source and city in Zhejiang Province were analyzed.The spatial distribution and intensity of ammonia emissions in 2017 were mapped using ArcGIS software.The total anthropogenic ammonia emissions in Zhejiang Province in 2017 were 122.00 kt.The farmland ecosystem was the major source of total ammonia emissions(36.06 kt),and nitrogen fertilizer applications was the largest contributor in this category(87.12%),followed by the livestock and poultry source(29.44%).The waste and human-activity sources were the two major non-agricultural sources,accounting for 44.07%and 28.49%,respectively.Hangzhou City had the highest ammonia emissions in 2017,accounting for 17.83%of the total ammonia emissions in Zhejiang Province.However,the ammonia emission intensity in Jiaxing City was the highest,reaching 3.82 t·km^-2.The spatial distribution map revealed that ammonia emissions in the northern and southeastern Zhejiang were relatively higher,while ammonia emission intensity was higher in the northern and northeastern region.