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Titel |
Hydrology in a Dutch polder catchment: natural processes in a man-made landscape |
VerfasserIn |
C. C. Brauer, J. N. M. Stricker, R. Uijlenhoet |
Konferenz |
EGU General Assembly 2012
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Medientyp |
Artikel
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Sprache |
Englisch
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Digitales Dokument |
PDF |
Erschienen |
In: GRA - Volume 14 (2012) |
Datensatznummer |
250061508
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Zusammenfassung |
Experimental catchments are traditionally located in areas with limited human influence, but
the societal and financial losses due to hydrological extremes are often larger in more densely
populated areas. In The Netherlands and other delta areas around the world, intensive
drainage and water level regulation have made patches of originally swampy land between
cities suitable for agriculture. The question is how the rainfall-runoff processes in these
artificial catchments compare to those occurring in more natural catchments and
whether conceptual hydrological models, which have been developed for natural
landscapes, contain the appropriate hydrological processes for application to artificial
catchments.
Our experimental “catchment” of 0.5Â km2 is part of a polder area located near the town
of Cabauw in The Netherlands. This polder is completely flat and at an “elevation" of one
meter below mean sea level. The catchment is drained by many small, man-made channels of
which the water levels are regulated. Water is supplied upstream into the catchment by the
local water authority.
The catchment is part of the Cabauw Experimental Site for Atmospheric Research
(CESAR), which is well-known in the international meteorological community. In addition to
the large amount of meteorlogical measurements, including precipitation and actual
evapotranspiration, we measure discharge (both into and out of the catchment), ground water
levels and soil moisture contents.
We will present a detailed development of the water balance terms over several years, an
overview of the main hydrological processes during wet and dry conditions and differences
between natural and polder catchments. |
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