Guadalquivir River (IMAGE) Spanish Foundation for Science and Technology Caption This is the Guadalquivir River as it passes through Seville, one of the areas most at risk of desertification in Spain. Credit Nesta Vázquez Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.