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Titolo:
MEASUREMENT AND ANALYSIS OF SMALL-SCALE CONVECTIVE STORM RAINFALL VARIABILITY
Autore:
GOODRICH DC; FAURES JM; WOOLHISER DA; LANE LJ; SOROOSHIAN S;
Indirizzi:
USDA ARS,SW WATERSHED RES CTR,2000 E ALLEN RD TUCSON AZ 85719 UNIV ARIZONA,DEPT HYDROL & WATER RESOURCES TUCSON AZ 85721
Titolo Testata:
Journal of hydrology
fascicolo: 1-4, volume: 173, anno: 1995,
pagine: 283 - 308
SICI:
0022-1694(1995)173:1-4<283:MAAOSC>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
64
Recensione:
Indirizzi per estratti:
Citazione:
D.C. Goodrich et al., "MEASUREMENT AND ANALYSIS OF SMALL-SCALE CONVECTIVE STORM RAINFALL VARIABILITY", Journal of hydrology, 173(1-4), 1995, pp. 283-308

Abstract

For large-scale catchment hydrology, the crucial importance of a goodestimate of spatial rainfall variability is generally admitted. However, the assumption of uniform rainfall is still applied for small areas, whether they are studied as individual catchments or represent an elementary area in a distributed model. To investigate the validity of this assumption, an experiment was conducted in a small catchment (4.4ha) in the semiarid USDA-ARS Walnut Gulch Experimental Watershed. Measurements were made with recording and non-recording raingages as wellas vectopluviometers for a range of events during the 1990 monsoon season (July-September). Geostatistical analysis of the data indicated the presence of first-order drift with corresponding rainfall gradientsranging from 0.28 to 2.48 mm per 100 m with an average of 1.2 mm per 100 m. These gradients represent a 4-14% variation of the mean rainfall depth over a 100 m distance. Giver: these observations, the assumption of spatial rainfall uniformity in this and similar convective environments at the small watershed scale of 5 ha appears to be invalid.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/12/20 alle ore 21:22:33