Hydrological functioning of wetlands, role in water retention

Abstract

What are the hydrological roles of wetlands in storing meteoric water and releasing it during low-water periods? This is a recurring question, and the diversity of wetlands means that there is no simple, single, definitive answer. Depending on the morphological type of wetland, the intensity of hydrological and biogeochemical functions differs, as do the ecosystem services rendered to society. Abiotic functional factors and ongoing functioning call for a holistic, systemic analysis of wetlands in their environment. The hydrological function must be in good condition to induce permanent or temporary waterlogging. Understanding the ecological processes at the origin of functions and functioning is essential for effective and sustainable action when necessary (hydrological restoration, reduction and control of pressures at the origin of dysfunctions).