The Site is the second largest inland delta in southern Norway. Situated where the Etna and Dokka rivers flow into Lake Randsfjorden, it includes large shallow areas, mud banks, numerous channels, bogs, meadows and islets dominated by shrubs and alder/shrub gallery forest. As one of the few unspoilt estuaries remaining in the region, the Site is highly important for biodiversity preservation, as it supports numerous nationally red-listed species and a rich invertebrate fauna. It also has an important function as a staging area for several migratory bird species, such as the bean goose (Anser fabalis), northern pintail (Anas acuta) and the vulnerable velvet scoter (Melanitta fusca). This area hosts almost 7% of the pink-footed goose (Anser brachyrhynchus) population. The delta is important as a spawning place for several of Randfjorden’s fish species, while more crustacean species are recorded in the delta than anywhere else in Norway. The Site is valuable in terms of sediment trapping, nutrient fixing and flood control. Cessation of grazing and hay cutting in the inner part of the delta has allowed rapid vegetation succession and as a result birds such as yellow wagtail (Motacilla flava) and Eurasian curlew (Numenius arquata) have either disappeared or become scarcer. However, restoration plans have been initiated. The National Wetlands Centre at the Site performs a range of tasks, such as education, guiding, management and monitoring of bird populations and plants. Popular activities include birdwatching and fishing.