<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Schmidt, A.</style></author><author><style face="normal" font="default" size="100%">Gibson, J. J.</style></author><author><style face="normal" font="default" size="100%">Santos, I. R.</style></author><author><style face="normal" font="default" size="100%">Shubert, M.</style></author><author><style face="normal" font="default" size="100%">Tattrie, K.</style></author><author><style face="normal" font="default" size="100%">Weiss, H.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The contribution of groundwater discharge to the overall water budget of two typical boreal lakes in Alberta/Canada estimated from a radon mass balance</style></title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Alberta Innovates</style></keyword><keyword><style  face="normal" font="default" size="100%">analytical methodology</style></keyword><keyword><style  face="normal" font="default" size="100%">AOSTRA</style></keyword><keyword><style  face="normal" font="default" size="100%">ARC</style></keyword><keyword><style  face="normal" font="default" size="100%">groundwater</style></keyword><keyword><style  face="normal" font="default" size="100%">hydrogeology</style></keyword><keyword><style  face="normal" font="default" size="100%">lake</style></keyword><keyword><style  face="normal" font="default" size="100%">survey</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2010</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.hydrol-earth-syst-sci.net/14/79/2010/hess-14-79-2010.pdf</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">Hydrology and Earth Systems Sciences </style></publisher><volume><style face="normal" font="default" size="100%">14</style></volume><pages><style face="normal" font="default" size="100%">10 pages </style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Radon-222, a naturally-occurring radioisotope with a half-life of 3.8 days, was used to estimate ground- water discharge to small lakes in wetland-dominated basins in the vicinity of Fort McMurray, Canada. This region is un- der significant water development pressure including both oil sands mining and in situ extraction. Field investigations were carried out in March and July 2008 to measure radon-222 distributions in the water column of two lakes as a tracer of groundwater discharge. Radon concentrations in these lakes ranged from 0.5 to 72Bq/m3, while radon concentrations in groundwaters ranged between 2000 and 8000 Bq/m3 . A radon mass balance, used in comparison with stable isotope mass balance, suggested that the two lakes under investigation had quite different proportions of annual groundwater inflow (from 0.5% to about 14% of the total annual water inflow). Lower discharge rates were attributed to a larger drainage area/lake area ratio which promotes greater surface connectivity. Interannual variability in groundwater proportions is expected despite an implied seasonal constancy in groundwater discharge rates. Our results demonstrate that a combination of stable isotope and radon mass balance approaches provides information on flowpath partitioning that is useful for evaluating surface-groundwater connectivity and acid sensitivity of individual water bodies of interest in the Alberta Oil Sands Region.</style></abstract><custom2><style face="normal" font="default" size="100%">Fort McMurray, Alberta oil sands </style></custom2><custom3><style face="normal" font="default" size="100%">http://www.worldcat.org/oclc/505547595</style></custom3><custom4><style face="normal" font="default" size="100%">OSEMB</style></custom4></record></records></xml>