|
|||||
|
|
A field experiment and numerical modeling of a tracer at a gravel beach in Prince William Sound,Alaska |
|
| Authors: | Qiaona Guo Hailong Li Michel C Boufadel Jin Liu |
| Institution: | 1. School of Earth Sciences and Engineering, Hohai University, No. 1 Xikang Road, Nanjing, 210098, People’s Republic of China 2. State Key Laboratory of Biogeology and Environmental Geology and School of Water Resources and Environmental Science, China University of Geosciences, Beijing, 100083, China 3. MOE Key Laboratory of Groundwater Circulation & Environment Evolution, China University of Geosciences, Beijing, 100083, China 4. Department of Civil and Environmental Engineering, Center for Natural Resources Development and Protection, New Jersey Institute of Technology, Newark, NJ, 07102, USA |
| Abstract: | Oil from the 1989 Exxon Valdez oil spill persists in many gravel beaches in Prince William Sound (Alaska, USA), despite great remedial efforts. A tracer study using lithium at a gravel beach on Knight Island, Prince William Sound, during the summer of 2008 is reported. The tracer injection and transport along a transect were simulated using the two-dimensional numerical model MARUN. Model results successfully reproduced the tracer concentrations observed at wells along the transect. A sensitivity analysis revealed that the estimated parameters are well determined. The simulated spatial distribution of tracer indicated that nutrients applied along the transect for bioremediation purposes would be washed to the sea very quickly (within a semi-diurnal tidal cycle) by virtue of the combination of the two-layered beach structure, the tidal fluctuation and the freshwater flow from inland. Thus, pore-water samples in the transect were found to be clean due to factors other than bioremediation. This may explain why the oil did not persist within the transect. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |