Tipología y cartografía por fotointerpretación de los humedales de las cuencas del Duero y del Tajo

In recent years, the concept of wetlands has broadened, as have the factors contributing to their genesis and maintenance, especially those related to groundwater. Photointerpretation, aided by field observations, permits their classification and typification according to dominant characteristics. The present paper describes the differences between groundwater discharge and recharge areas in the wetlands under study according to their morphology, distribution, associated vegetation, presence or absence of salt-bed enclaves, geomorphological phenomena such as "hummock-hollow" complexes and gilgai microrelief, etc. The conclusions distinguish four large groups of wetlands: recharge ponds, local lineal discharges, intermediate diffuse discharges, and regional diffuse discharges.