![]() ![]() Cette situation exige des efforts accrus en vue d’une gestion plus durable des ressources en eau. Cette évolution préjudiciable se traduit par une baisse du niveau des eaux souterraines et une réduction connexe de la zone présentant des conditions artésiennes dans le centre de la vallée. ![]() Since stable isotope signatures indicate the recharge areas to be located in the mountains surrounding the valley, these efforts must not be limited to the central part of the valley where most of the abstraction wells are located.ĭans la vallée de l’Ararat (Arménie), une demande en eau en constante augmentation (pour l’irrigation et la pisciculture) et une diminution simultanée de la recharge des nappes phréatiques (en raison du changement climatique) entraînent un stress croissant sur les ressources locales en eau souterraine. The presence of young groundwater (i.e., younger that the 1970s), some containing nitrate, indicates groundwater vulnerability and underscores the importance of increased efforts to achieve sustainable management of this natural resource. The differing groundwater ages are reflected by varying scatter of stable isotope and hydrochemical signatures. While subannual groundwater residence times could be disproved ( 35S), the detected 3H pattern suggests groundwater ages of several decades, with the oldest waters being recharged around 60 years ago. The results show that the Ararat Valley receives modern recharge, despite its (semi-)arid climate. The aim of this baseline study was the collection of data that allows for study on the origin and age distribution of the Ararat Valley groundwater based on environmental tracers, namely stable (δ 2H, δ 18O) and radioactive ( 35S, 3H) isotopes, as well as physical-chemical indicators. ![]() This situation calls for increasing efforts aimed at more sustainable water resources management. This detrimental development is reflected by groundwater-level drops and an associated reduction of the area with artesian conditions in the valley centre. Within the Ararat Valley (Armenia), a continuously growing water demand (for irrigation and fish farming) and a simultaneous decline in groundwater recharge (due to climate change) result in increasing stress on the local groundwater resources. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |