TY - JOUR
T1 - Relationship between wadi drainage characteristics and peak-flood flows in arid northern oman
AU - Al-Rawas, Ghazi A.
AU - Valeo, Caterina
PY - 2010
Y1 - 2010
N2 - Relationships between watershed characteristics and mean wadi flood peaks in arid regions are investi- gated. Mean flood peak discharge was derived for 12 watersheds ranging from 64 to 1730 km 2 in Oman using 270 flood events from 10 years of record. Fourteen watershed characteristics were automatically extracted from a digital elevation model, and multiple regression was used to investigate the effect of these characteristics on wadi mean peak flow (Q MPF) and 5-, 10-, 20-, 50- and 100-year return period flood peaks. Drainage area (DA), wadi slope (WS), watershed mean elevation (BE) and agricultural/farm area (FR) were found to be the key variables affecting flood flows. As return period increased, the influence of BE on flood-peak estimation decreased. In addition, urbanization is increasing alongside increasing agricultural areas, and the inclusion of FR in the relationship improved the variance explanation by 11% over models using only traditional variables such as DA and BE.
AB - Relationships between watershed characteristics and mean wadi flood peaks in arid regions are investi- gated. Mean flood peak discharge was derived for 12 watersheds ranging from 64 to 1730 km 2 in Oman using 270 flood events from 10 years of record. Fourteen watershed characteristics were automatically extracted from a digital elevation model, and multiple regression was used to investigate the effect of these characteristics on wadi mean peak flow (Q MPF) and 5-, 10-, 20-, 50- and 100-year return period flood peaks. Drainage area (DA), wadi slope (WS), watershed mean elevation (BE) and agricultural/farm area (FR) were found to be the key variables affecting flood flows. As return period increased, the influence of BE on flood-peak estimation decreased. In addition, urbanization is increasing alongside increasing agricultural areas, and the inclusion of FR in the relationship improved the variance explanation by 11% over models using only traditional variables such as DA and BE.
KW - Arid environments
KW - Flood frequency analysis
KW - Gis
KW - Mean peak flows
KW - Multiple regression analysis
KW - Wadi
KW - Watershed characteristics
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U2 - 10.1080/02626661003718318
DO - 10.1080/02626661003718318
M3 - Article
AN - SCOPUS:84857016579
SN - 0262-6667
VL - 55
SP - 377
EP - 393
JO - Hydrological Sciences Journal
JF - Hydrological Sciences Journal
IS - 3
ER -