Abstract：
:This paper addresses some fundamental problems related to the structure and function of catchment areas in general and for seasonal (weekly, monthly) mass balance calculations of radionuclides (and metals, organics and nutrients) in particular. A new catchment area model has been developed and critically tested. This modelling approach is based on mechanistic principles. The catchment area is differentiated into inflow ( approximately dry land) areas and outflow (=wetland) areas. The model also accounts for time-dependent fixation of substances in the catchment related to single-pulse fallouts. The model has a general structure. It is simple to use since there are only two soil type classes and three categories for the outflow areas. In critical tests, the model was put within a framework where it is intended, i.e., within a more comprehensive lake model. Radiocesium was used as a tracer in these tests. Modelled values were compared to empirical data from 23 lakes (351 data on (137)Cs in water, as well as in sediments, small fish and on suspended particles) covering a very wide limnological domain (latitudes from 42 to 61 degrees V, altitudes from 0 to 1090 m ASL, catchment areas from 0.17 to 114,700 km(2), precipitation from 430 to 1840 mm/year, lake areas from 0.042 to 1147 km(2), mean depths from 1.1 to 90 m, pH from 5.1 to 9 units, potassium concentrations from 0.23 to 27.5 mg/l, total P concentrations from 8.3 to 100 microg/l and theoretical water retention times from 0.02 to 137 years). When modelled values were compared to empirical data, the slope was almost perfect (0.99) as well as the coefficient of determination (r2 = 0.96).
journal_name
J Environ Radioactjournal_title
Journal of environmental radioactivityauthors
Håkanson Ldoi
10.1016/j.jenvrad.2003.10.003subject
Has Abstractpub_date
2004-01-01 00:00:00pages
267-87issue
3eissn
0265-931Xissn
1879-1700pii
S0265-931X(03)00274-1journal_volume
73pub_type
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
doi：10.1016/j.jenvrad.2004.05.005
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abstract：:Anomalous atmospheric variations in radon related to earthquakes have been observed in hourly exhaust-monitoring data from radioisotope institutes in Japan. The extraction of seismic anomalous radon variations would be greatly aided by understanding the normal pattern of variation in radon concentrations. Using atmosp...
journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
doi：10.1016/j.jenvrad.2018.10.018
更新日期：2019-01-01 00:00:00
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
doi：10.1016/j.jenvrad.2016.07.022
更新日期：2016-11-01 00:00:00
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
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更新日期：2007-01-01 00:00:00
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
doi：10.1016/j.jenvrad.2017.11.007
更新日期：2018-01-01 00:00:00
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
doi：10.1016/j.jenvrad.2003.10.007
更新日期：2004-01-01 00:00:00
abstract：:Environmental assessments to evaluate potentials risks to humans and wildlife often involve modelling to predict contaminant exposure through key pathways. Such models require input of parameter values, including concentration ratios, to estimate contaminant concentrations in biota based on measurements or estimates o...
journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
doi：10.1016/j.jenvrad.2012.07.014
更新日期：2013-12-01 00:00:00
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
doi：10.1016/j.jenvrad.2004.03.010
更新日期：2004-01-01 00:00:00
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
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更新日期：2009-02-01 00:00:00
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
doi：10.1016/j.jenvrad.2018.03.018
更新日期：2018-09-01 00:00:00
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
doi：10.1016/j.jenvrad.2013.06.011
更新日期：2014-01-01 00:00:00
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
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更新日期：2013-06-01 00:00:00
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
doi：10.1016/s0265-931x(01)00160-6
更新日期：2002-01-01 00:00:00
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doi：10.1016/s0265-931x(00)00207-1
更新日期：2001-01-01 00:00:00
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
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journal_title：Journal of environmental radioactivity
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更新日期：2020-05-01 00:00:00
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journal_title：Journal of environmental radioactivity
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更新日期：2010-07-01 00:00:00
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journal_title：Journal of environmental radioactivity
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更新日期：2020-04-01 00:00:00
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
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更新日期：2005-01-01 00:00:00
abstract：:The migration of a contaminant through the environment is the result of the transport by a variety of biotic and abiotic carriers which move according to different dispersion mechanisms. Consequently, the patterns of the distribution of a pollutant in the environment cannot be ever explained on the basis of a single m...
journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
doi：10.1016/j.jenvrad.2009.09.006
更新日期：2010-02-01 00:00:00
