HR: 0800h
AN: H31B-1299    [Abstracts]
TI: Assessment of Nitrate Contamination of Groundwater in Korea Using a Mathematical Simulation Model
AU: * Lee, E
EM: piety99@snu.ac.kr
AF: Seoul National University, School Earth and Environmental Sciences NS80, Seoul, 151-742 Korea, Republic of
AU: Kim, M
EM: meejeongkim@empal.com
AF: Seoul National University, School Earth and Environmental Sciences NS80, Seoul, 151-742 Korea, Republic of
AU: Lee, K
EM: kklee@snu.ac.kr
AF: Seoul National University, School Earth and Environmental Sciences NS80, Seoul, 151-742 Korea, Republic of
AB: According to the nationwide groundwater monitoring system, nitrate is one of the major contaminants found in groundwater in Korea. Septic systems, animal waste and fertilizer are potential sources of nitrate contamination. There have been a growing number of studies on identification of the source of nitrate contamination of groundwater at agricultural sites, or analysis of the groundwater contamination at intensive livestock facilities. However, there have been a few studies on linkage between the surface loading of nitrate sources and the level of groundwater contamination. The objective of this study is to assess the groundwater contamination with nitrate resulted from current agricultural practices, and the potential impacts of changes in the practices on the groundwater contamination by using a mathematical model. An integrated modeling framework incorporating the nitrogen leaching model, LEACHN, and mass transport model, RT3D linked to MODFLOW was used to account for the fate and transport of nitrate through soil and groundwater. Data were collected from different areas so that they could represent the condition of agricultural sites in Korea. The groundwater nitrate contamination was assessed for different crops and soil types under varying fertilization rates and manure application.
DE: 1831 Groundwater quality
DE: 1832 Groundwater transport
DE: 1847 Modeling
SC: Hydrology [H]
MN: Fall Meeting 2005