韶山森林生态系统硫沉降临界负荷  

Critical Load of Sulfur Deposition in Shaoshan Forest Ecosystem

作　　者：向仁军[1,2] 柴立元[1] 曾梅[3] 张龚 张西林[2] 

机构地区：[1]中南大学冶金学院环境工程系,湖南长沙410083 [2]湖南省环境保护科学研究院,湖南长沙410004 [3]长沙环境保护职业技术学院系,湖南长沙410004 [4]湖南省环境保护局,湖南长沙410076

出　　处：《湖南大学学报（自然科学版）》2009年第5期71-76,共6页Journal of Hunan University:Natural Sciences

基　　金：中国-挪威合作项目“中国酸沉降综合影响观测研究”(IMPACTSCHN0030)

摘　　要：MAGIC和SMART模型在计算临界负荷时均存在一定的局限,但二者机理较为类似,考虑的主要反应过程可以相互补充.为了准确地计算硫沉降临界负荷,将MAGIC模型与SMART模型相结合,模拟了一定酸沉降量下生态系统化学状态随时间变化的趋势,并计算出韶山硫沉降临界负荷为1.76keq(hm2.a)-1.通过与MAGIC模型计算的硫沉降临界负荷2.28keq(hm2.a)-1比较,用MAGIC和SMART模型相结合的方法计算临界负荷更接近实测值.There are some deficiencies in the calculation of critical load by MAGIC model and SMART model, but the mechanisms of the two models are similar, and the dominating reactive processses are complementary between them. In order to get more exact critical load value and reduce the error, this paper discussed correlative research. The trend of chemical situations of ecosystem along with seasons was simulated under a certain amount of acid deposition by incorporating MAGIC and SMART models. The critical load of sulfur is 1.76 keq （hm^2· a）^ - 1 calculated by incorporating the two models, and it＇s more close to the monitoring value than the value 2.28 Keq（hm^2· a）^- 1 calculated by MAGIC model.

关 键 词：硫沉降 临界负荷 生态系统 模型 

分 类 号：X511[环境科学与工程—环境工程]