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| Titel |
Mapping mean and variance of runoff in a river basin |
| VerfasserIn |
L. Gottschalk, I. Krasovskaia, E. Leblois, E. Sauquet |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 10, no. 4 ; Nr. 10, no. 4 (2006-07-03), S.469-484 |
| Datensatznummer |
250008135
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| Publikation (Nr.) |
 copernicus.org/hess-10-469-2006.pdf |
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| Zusammenfassung |
| The study presents an approach to represent the two first order moments of
temporal runoff variability as a function of catchment area and aggregation
time interval, and to map them in space. The problem is divided into two
steps. First, the first order moment (the long term value) is analysed and
mapped applying an interpolation procedure for river runoff. In a second
step a simple random model for the river runoff process is proposed for the
instantaneous point runoff normalised with respect to the long term mean.
From this model analytical expressions for the time-space
variance-covariance of the inflow to the river network are developed, which
then is used to predict how the second order moment varies along rivers from
headwaters to the mouth. The observation data are handled by a hydrological
information system, which allows to display the results either in the form
of area dependence of moments along the river branches to the basin outlet
or as a map of the variation of the moments across the basin. The findings
are demonstrated by the example of the Moselle drainage basin (French part). |
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