Irrigation effects on the salinity of the Arba and Riguel Rivers (Spain): present diagnosis and expected evolution using geochemical models
Source: Environmental Geology, Volume 45, Number 5, March 2004 , pp. 703-715(13)
Abstract:This work diagnoses the present salinity of the Riguel and Arba Rivers (Spain) and predicts its expected evolution using geochemical models applied to the modernization of the actual Bardenas I and the completion of irrigation in the Bardenas II irrigation districts. The results show a progressive increase in salinity (from 0.39 to 2.21 dS/m electrical conductivity) in the Riguel-Arba system, due to the cumulative collection of irrigation return flows and its progression towards more saline facies. The Bardenas I modernization, involving an increase in irrigation efficiency from 50 to 90%, will decrease the volume and salinity of the Riguel River by 30%. In contrast, irrigation of the new 24,000 ha Bardenas II land will increase the flow (12%) and salinity (21%) of the Arba River. Geochemical models may help in providing sensible estimates on the impact of irrigation on the salinity of the receiving water bodies.
Document Type: Research Article
Affiliations: 1: Servicio de Investigación Agroalimentaria- Diputación General de Aragón (DGA) y Laboratorio de Agronomía y Medio Ambiente (DGA-CSIC), Apdo 727, 50080, Zaragoza, Spain, Email: firstname.lastname@example.org 2: Facultad de Ciencias Geológicas, Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain, 3: Servicio de Investigación Agroalimentaria- Diputación General de Aragón (DGA) y Laboratorio de Agronomía y Medio Ambiente (DGA-CSIC), Apdo 727, 50080, Zaragoza, Spain,
Publication date: 2004-03-01