ISOTOPE HYDROLOGICAL STUDY OF MEAN TRANSIT TIMES IN AN ALPINE BASIN (WIMBACHTAL, GERMANY)

被引:108
作者
MALOSZEWSKI, P
RAUERT, W
TRIMBORN, P
HERRMANN, A
RAU, R
机构
[1] TECH UNIV BRAUNSCHWEIG,INST GEOG & GEOOKOL,W-3300 BRAUNSCHWEIG,GERMANY
[2] BAYER AKAD WISSENSCH,KOMMISS GLAZIOL,W-8000 MUNICH 2,GERMANY
关键词
D O I
10.1016/0022-1694(92)90247-S
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Measurements of tritium and O-18 concentrations in precipitation and runoff were used to provide further insight into the groundwater storage properties of the Wimbachtal Valley, a catchment area of 33.4 km2, extending between 636 and 2713 m a.s.l. in the Berchtesgaden Alps. The catchment includes three aquifer types: a dominant porous aquifer; a fractured dolomite; a karstic limestone aquifer. Employing a simple hydrological model, information about mean transit times of environmental tracers is derived for the groundwater runoff component and several karst springs from the application of the exponential and dispersion flow models to the isotopic input and output data. The mean transit times calculated from a dispersion model with transit times of 4.1 years for O-18 and 4.2 years for tritium, which agree well, allow calculation of total (mobile + stagnant) groundwater storage volume, which is equivalent to 6.6 m of water depth. Direct runoff appears negligible as in many other cases.
引用
收藏
页码:343 / 360
页数:18
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