Arba (river)

Arba
The Arba at Luesia
Data
location	Spain
River system	Ebro
Drain over	Ebro  → Mediterranean
Source height	1350  msnm
muzzle	at Gallur in the Ebro coordinates: 41 ° 52 ′ 32 "  N , 1 ° 18 ′ 53"  E 41 ° 52 ′ 32 "  N , 1 ° 18 ′ 53"  E
length	96 km
Catchment area	2249 km²
Small towns	Luesia; Ejea de los Caballeros; Thousands

The Arba ( Spanish Río Arba ) is a river in northern Spain and the first significant tributary of the Ebro . It rises in the Sierra de Santo Domingo south of the Santa Barbara Pass in the northern part of Spain . Its river basin lies almost entirely in the province of Zaragoza in the Aragon region . Source rivers are the Arba de Biel and the Arba de Luesia . It flows from north to south and flows into the Ebro at Gallur. The cities of Luesia , Ejea de los Caballeros and Tauste lie along its course . In its lower course it takes the Río Riquel, which flows through Uncastillo and Sádaba . on. It reaches a length of approx. 96 kilometers.