Morphometric characterization provides a quantitative basis for interpreting drainage-net-work development, basin shape, relief controls and the expected hydrological response of ungauged arid catchments. This study investigates three major ephemeral wadi basins drain-ing eastward toward Hurghada City and the Red Sea coast: Wadi Faliq El-Sahal, Wa-di Faliq El-War and Wadi Abu Malka. Drainage networks, stream ordering, sub-catchments and mor-phometric parameters were derived from a digital elevation model based on a GIS-based workflow. Land use/land cover and hydrologic soil-group layers were combined to facilitate the estimation of curve number. Maximum daily rainfall rec-ords from Hurghada station for the period 1968-2021 were used for rainfall-frequency analysis. The hydrological response was simulated using the Soil Conservation Service Curve Number method within HEC-HMS for selected return periods. The three basins have areas of 253.15, 146.82 and 82.22 km², respectively and present strong relief gradi-ents from the Red Sea Mountains towards the coastal plain. Bare ground dominates the land-cover composition, while hydrologic soil groups B and C control infiltration and runoff generation. The morphometric results show clear spatial differences in drainage development, basin elongation, relief ratio, ruggedness number and flow-concentration characteristics among the sub-catchments. HEC-HMS simu-lations indicate that Wadi Faliq El-Sahal produces the highest peak discharge, reaching 159.2 m³/s for the 100-year event, followed by Wadi Faliq El-War and Wadi Abu Malka with 80.2 and 70.5 m³/s, re-spectively. These results demonstrate that integrating morphometric inter-pretation with rainfall-runoff modeling improves the understanding of hydrological behavior in data-scarce arid wadis.