SPACE-TIME HETEROGENEITIES OF RAINFALLS ON RUNOFF OVER URBAN CATCHMENTS

Citation
C. Roux et al., SPACE-TIME HETEROGENEITIES OF RAINFALLS ON RUNOFF OVER URBAN CATCHMENTS, Water science and technology, 32(1), 1995, pp. 209-215
Citations number
7
Categorie Soggetti
Water Resources","Environmental Sciences","Engineering, Civil
ISSN journal
02731223
Volume
32
Issue
1
Year of publication
1995
Pages
209 - 215
Database
ISI
SICI code
0273-1223(1995)32:1<209:SHOROR>2.0.ZU;2-Z
Abstract
Simulated outlet flow series are compared downstream of a 14 sq.km. ur ban watershed. They are generated either with design rainfall, with lo ng-term point rainfall series, or with long-term space distributed rai nfall series (measured with 3 raingauges or with radar). The use of th e double-triangle shaped hyetograph as design rainfall provides the sa me T-year flow as the long term 3 raingauge series, if it is used with a areal reduction factor and uniformly applied to the watershed. For the same T-year mean areal precipitation depth during the time of conc entration, the rainfall spatial and temporal heterogenities may induce differences up to +/- 30% on the peak now, compared to the T-year pea k flow.