Testing the Validity of a Critical Sulfur and Nitrogen Load Model in Southern Ontario, Canada, usingSoil Chemistry Data from MARYP
| 详细信息 | 推荐本文 | |
- 作者：Kumar ; Ashij J. ; Gough ; William A. ; Karagatzides ; Jim D. ; Bolton ; Kim A. ; Tsuji ; Leonard J. S.
- 关键词：acidic deposition ; acid rain ; critical load ; model validation ; Monitoring Acid Rain Youth Program (MARYP) ; soil acidification
- 刊名：Environmental Monitoring and Assessment
- 出版时间：2001
- 出版年：2001
- 期刊代码：19_01676369
- 类别：ch
- 卷：69
- 期：3
- 页码：221-230
- 数据来源：sp
摘要
The validity of a steady-state massbalance model (Arp et al., 1996; referred to asARP) was tested using physicochemical soil data fromthe Monitoring Acid Rain Youth Program (MARYP). FourARP sites were matched with ten MARYP sites accordingto proximity, bedrock type and subsoil pH to test thevalidity of the ARP model for critical loadexceedances. Soil solution pH, base concentration andAl concentration from MARYP sites, which were wellmatched to ARP sites, validated the modelled criticalload exceedances. Higher exceedance areas wereassociated with more acidic pH and lower base andhigher Al concentrations from matched MARYP sites andvice versa. One ARP site was inappropriately matchedwith MARYP sites and could not be validated using baseand Al concentrations. This study also confirmed thesouthern limit of the zero critical load exceedanceisopleth from the model. However, variability of theother exceedance isopleths was noted due to thelimited number of sites used in the model. Thevalidation of these sites in the ARP model and thezero critical load exceedance isopleth nonethelessallows greater confidence in using this model as amanagement tool for acidic deposition.