Résultats de la recherche (9 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Floodplain-river ecosystems : fragmentation and water resources development
  • The aim of this study is to quantify the change in fragmentation of a large floodplain river ecosystem that has been subject to water resource development. It considers both the spatial and the temporal effects of fragmentation on the potential
  • exchange of dissolved organic carbon between a series of floodplain patches (anabranch channel) and the main river channel. The study has used a framework partly derived from landscape ecology, to advance the understanding of the structure and functioning
  • of floodplain-river ecosystems.
  • Effects of Jackson Lake Dam on the Snake River and its floodplain, Grand Teton National Park, Wyoming, USA
  • The aim of this project is to document the effects of Jackson Lake Dams on flows and stability of the Snake River, and the subsequent impact of these changes on floodplain vegetation and related resources. Vegetation maps were constructed from 1945
  • -pulse dominated mosaic to a more terrestrial-like pattern of succession. Changes in the Snake River and its floodplain have direct implications on habitat, safety of rafting and canoeing, and biodiversity at the community and species levels.
  • Equilibrium or indeterminate ? Where sediment budgets fail : sediment mass balance and adjustment of channel form, Green River downstream from Flaming Gorge Dam, Utah and Colorado
  • Aménagement hydraulique ; Barrage ; Bilan sédimentaire ; Colorado ; Cours d'eau ; Etats-Unis ; Green River ; Géométrie hydraulique ; Méandre ; Plaine d'inondation ; Utah
  • This study examines bed and bank adjustment in the 105-km reach of the Green River immediately downstream from Flaming Gorge Dam by the use of historical aerial and oblique photographs, analysis of current and abandoned stream-gaging records
  • , and field observations. The AA. show that the sediment budget is indeterminate and that this river segment is not degrading, but is, in fact, accumulating sediment. They also show that robust measures of channel change over long reaches better characterize
  • be replaced by models of transient states applied to the reach scale in order to respond to the needs of river managers over decadal timescales.
  • Connecticut ; Dam ; Fluvial dynamics ; Gravel ; Hydraulic works ; River bed ; Sediment transport ; Stream ; United States of America
  • . The results indicate that the major pulse of dam construction during the previous century has modified hydrologic regimes on a nationwide scale, for large and small rivers.
  • of the texture and lithology of modern bed materials in the Yuba River basin are presented that demonstrate reworked sediment from mining is an important component of the modern sediment load and fine spawning gravels.
  • that are influenced by dams. The economic context for research includes large amounts of public funds for river restoration, along with substantial private investments in dams. The cultural context for research is highly contentious and dominated by advocacy
  • A series of small dams were built in Icicle Creek in 1937. A flow-competence approach was used to assess the restoration potential of the river to do the work of flushing sediments and reestablishing the predam stream channel characteristics