De impact van de Hoge Asvandam op de benedenloop van de Wadi Allaqi (Zuidoost-Egypte). Een multitremporele studie aan de hand van Corona, Landsat ETM+ en Asterbeelden
Dam ; Egypt ; Hydraulic works ; Impact study ; Landscape dynamics ; Remote sensing
Die voorkoms en betekenis van hangterrasse in die Hartbeespoortdamomgewing. (The existence and significance of slope terraces in the vicinity of the Hartbeespoort Dam)
De Damwijk op nieuwe sporen ? Groeipooleffecten van het stadsontwikkelingsproject Spoor Noord op de Damwijk in Antwerpen Noord
Le quartier du Dam sur de nouvelles voies ? Les effets du pôle de croissance du projet de développement Chemin Nord sur le quartier du Dam à Anvers Nord
Les villes ont toujours évolué et les autorités essaient de trouver les solutions les plus efficientes : la ville d'Anvers n'échappe pas à la règle. Le quartier du Dam situé au nord de la ville d'Anvers est une zone à difficultés car longtemps
, un plan supralocal de rénovation s'avèrerait indispensable. Sur la base d'une étude faite dans le quartier du Dam et sur la base d'un nombre d'interviews, cinq pôles de croissance ont été envisagés mais la question cruciale est de savoir si les pôles
Silenced rivers: the ecology and politics of large dams
Dam ; Environment ; Hydraulic works ; Impact study ; Political geography ; Project
Devastating critique of the environmental effects and human consequences of dams around the world. Considers the powerful political and economic interests behing large dam projects, many proposed and built for large international aid projects
Jökulhlaup initiation by ice-dam flotation : the significance of glacier debris content
Ice-dam flotation is a commonly described mechanism for the initiation of jökulhlaups (catastrophic floods)from ice-dammed lakes, but predictions of the critical lake depth required for flotation often differ from the actual lake depth at which
flotation occurs. Glacier debris content is identifed as an insufficiently recognized variable in ice-dam flotation. It is demonstrated that high debris contents could suppress flotation, and thereby affect the timing, mechanism and magnitude of catastrophic
lake drainage events. The density of the part of the glacier forming the ice dam is the key to predicting ice-dam flotation.
Formation and failure of volcanic debris dams in the Chakachatna River valley associated with eruptions of the Spurr volcanic complex, Alaska
Alaska ; Cold area ; Dam ; Glacial lake ; Holocene ; Lahar ; Mudflow ; Natural hazards ; Quaternary ; Stream ; Volcanic eruption ; Volcanism
In this paper, evidence for several episodes of debris dam formation associated with eruptions of the Spurr volcanic complex are described. Dam failure conditions and peak discharge are estimated with a dam-break model and regression equations
that relate peak discharge to dam and reservoir characteristics.
Dams, sediment sources and reservoir silting in Romania
Dams and geomorphology. Special issue
Dam ; Dammed lake ; Earth surface processes ; Hydraulic works ; Romania ; Sediment budget ; Sedimentation ; Silting ; Watershed
The AA. analyzed 138 reservoirs for which there is a determination of the silting time. They try to make a synthesis of the knowledge stage of the dam lakes silting in Romania on the basis of the relations with the territory morphodynamics
and considering the substantial accumulations of new data. The factual material that they have is structured as follows : the construction of dams and the arrangement of reservoirs in Romania; the problem of sediment sources and, the silting of reservoirs.
Geoarchaeological studies in the environs of the ancient dam of glosses, Akarnania, NW Greece
Aetolia and Acarnania ; Archaeology ; Dam ; Geoarchaeology ; Geomorphology ; Greece ; Stratigraphy
The Glosses dam (Akarnania, Northwest Greece) is one of the best preserved ancient dams in Greece. The article deals with Greece, Akarnania, geoarchaeology, morphodynamic activity and stability and alluvial fan stratigraphy. - (IfL)
Climatic change ; Dam ; Dendrochronology ; Dendrology ; Floodplain ; Florida ; Forest ; Human impact ; Hydraulic works ; Hydrological regime ; Stream ; United States of America
Shifts in the hydrologic regime of Florida's Apalachicola River have been attributed to anthropogenic changes throughout its watershed, including local dam construction. To assess impacts of those shifts on floodplain forests, the AA. reconstructed
tree growth using dendrochronology and compared these trends with hydrological and climatic variables. Comparisons of stream-gage data before and after dam construction on the Apalachicola River revealed statistically significant mean declines in annual
River channel change following dam removal in an ephemeral stream
Australia ; Base level ; Dam ; Ephemeral stream ; Fluvial erosion ; Hydraulic works ; New South Wales ; River bed ; Stream
The aim of this study is to analyse the geomorphic responses of the ephemeral Bushrangers Creek, central western New South Wales, Australia, following the 2002 removal of 15 m high dam. Comparisons of pre- and post-dam removal survey data indicate
that there has been repeated base-level lowering upstream of the former dam site. Longitudinal profiles of the thalweg before and after dam removal show an average bed lowering of 0.5 m and reveal a 90 m long channel with a slope in excess of two-times greater
than the pre-dam removal channel has formed upstream of the former dam wall.
Shoreline erosion : a cautionary note in using small farm dams to determine catchment erosion rates
Australia ; Cattle ; Dam ; Erosion ; Erosion rate ; Gully erosion ; Hydraulic works ; Sediment transport ; Victoria ; Watershed
Data from 10 small dams in SE Australia show that shoreline erosion due to farm livestock access to the dams can account for a significant proportion (up to 85%) of sediment contained in the dam. The volumes of sediment resulting from such shoreline
erosion may be of the same order as the volumes produced by gully erosion in the dam's catchments, prompting caution in using farm dams to which livestock have access to determine small catchment erosion rates. Other issues, related to the trap efficiency
, also mean that erosion estimates based on farm dam sedimentation should be treated with caution.
The geomorphic influences of beaver dams and failures of beaver dams
Dams and geomorphology. Special issue
Biogenic process ; Dam ; Flood ; Fluvial dynamics ; North America ; Rodent ; Stream
The AA. examine the zoogeomorphological influences of the construction of beaver dams. They restrict their discussion to North America and the species C. canadensis. Removal of beavers by overtrapping in the 16th-19th centuries severely reduced
their number and the number of ponds and dams. Partial recovery of beaver populations in the 20 th century has allowed reoccupation of the entirety of the pre-contact range, but at densities of only one-tenth the numbers. During the past 20 years, numerous
cases of dams failure have been documented that resulted in outburst floods.
Hydrogeomorphic effects of beaver dams in Glacier National Park, Montana
Biogenic process ; Biogeography ; Dam ; Fluvial processes ; Montana ; National park ; Rodent ; Sediment budget ; Sedimentation ; Stream ; Stream flow ; United States of America
This study provides additional data on sedimentation and stream flow in order to better understand the efficacy of beaver dams to trap sediment and alter the flow regime of streams, respectively. Data are collected on sedimentation depth (thickness
) and volume, as well as stream velocity and discharge above and below beaver dams in eastern Glacier National Park (GNP), Montana. In addition, measurements of dam and pond morphology are examined in relation to sedimentation and flow alteration patterns.
The 1786 earthquake-triggered landslide dam and subsequent dam-break flood on the Dadu river, southwestern China
Herein the discussion is focused on 2 aspects of the conclusion. It is believed that dam overtopping was the primary cause of the Dadu river landslide dam failure, although aftershocks may have further weakened the embankment. Using physically based