 |
| Titel |
Theoretical framework to estimate spatial rainfall averages conditional on river discharges and point rainfall measurements from a single location: an application to western Greece |
| VerfasserIn |
A. Langousis, V. Kaleris |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1027-5606
|
| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 17, no. 3 ; Nr. 17, no. 3 (2013-03-22), S.1241-1263 |
| Datensatznummer |
250018836
|
| Publikation (Nr.) |
 copernicus.org/hess-17-1241-2013.pdf |
|
|
|
|
|
| Zusammenfassung |
| We focus on the special case of catchments covered by a single rain gauge
and develop a theoretical framework to obtain estimates of spatial rainfall
averages conditional on rainfall measurements from a single location, and
the flow conditions at the catchment outlet. In doing so we use (a)
statistical tools to identify and correct inconsistencies between daily
rainfall occurrence and amount and the flow conditions at the outlet of the
basin; (b) concepts from multifractal theory to relate the fraction of wet
intervals in point rainfall measurements and that in spatial rainfall
averages, while accounting for the shape and size of the catchment, the
size, lifetime and advection velocity of rainfall-generating features and
the location of the rain gauge inside the basin; and (c) semi-theoretical
arguments to assure consistency between rainfall and runoff volumes at an
inter-annual level, implicitly accounting for spatial heterogeneities of
rainfall caused by orographic influences. In an application study, using
point rainfall records from the Glafkos river basin in western Greece, we find
the suggested approach to demonstrate significant skill in resolving
rainfall–runoff incompatibilities at a daily level, while reproducing the
statistics of spatial rainfall averages at both monthly and annual time
scales, independent of the location of the rain gauge and the magnitude of
the observed deviations between point rainfall measurements and spatial
rainfall averages. The developed scheme should serve as an important tool
for the effective calibration of rainfall–runoff models in basins covered by
a single rain gauge and, also, improve hydrologic impact assessment at a
river basin level under changing climatic conditions. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|