Experimental study of wind directional variability in the vicinity of a model valley
Aeolian features ; Aeolian transport ; Aerosol ; Atmospheric pollution ; Experimentation ; Modelling ; Topography ; Valley ; Wind ; Wind speed
This paper reports the results of a preliminary study examining the effects of valley presence on airflow direction and focuses on valleys situated in areas of low relief. Wind tunnel experiments are used to visualise near-surface airflow over
a series of models representing valleys oriented at different angles to mean airflow. This study has significance to the modelling of pollution dispersal and also aeolian sediment and nutrient dynamics in desert regions.
Holocene development of the River Lippe valley, Germany : a case study of anthropogenic influence
This article describes the Inselterrasse and Aue in detail and explains the Holocene development of the Lippe valley floor morphology, which is atypical for a central European river. It is shown that morphological evolution of the Lippe valley floor
is a special case of anthropogenic influence that might be an interesting addition to previous studies of human impacts on palaeohydrology, channel change and valley floor development (Gregory, 1995; Brown, 1996; Kalicki,1996).
Glacial geomorphology of Bonney drift, Taylor valley, Antarctica
The aim of this paper is to document the response of the East Antarctic Ice Sheet (EAIS) near the Dry Valleys to the excess warmth of the last interglaciation by establishing the behavior of Taylor Glacier. The AA. present a model for the deposition
by Taylor Glacier of Bonney drift in central Taylor Valley. Bonney drift is important because it records the penultimate advance of Taylor Glacier through central and lower Taylor Valley.
Fine resolution palaeoecology confirms anthropogenic impact during the Late Holocene in the Lower Hawkesbury valley, NSW
Australia ; Ecosystem ; Floodplain ; Holocene ; Human impact ; Humid environment ; New South Wales ; Palaeo-ecology ; Palaeo-environment ; Prehistory ; Riparian vegetation ; Sedimentation ; Settlement ; Valley
This paper uses a range of palaeoecological techniques, applied at fine resolution, to gain a better understanding of the lower Hawkesbury Valley over the last 820 years. By examining land-system response to Aboriginal and European management
Natural and human factors in recent Central Valley floods
Paper reviews flooding events of 1986 and 1997 in California's Central Valley, when subtropical storms precipitated heavily over watersheds draining into the Valley. Precipitation levels and patterns of flooding were different. After 1997, officials
Geomorphic controls on the physical and hydrologic properties of soils in a valley floor
The distribution of soil hydraulic and physical properties strongly influences runoff processes in landscapes. A technique that links the estimation and distribution of soil hydraulic properties in valleys, with easily identified geomorphic features
, was developed along a 2 km length of a valley at Brooks Creek in New South Wales, Australia. Soil physical and hydraulic property data were collected across a set of floodplain and fan features within the valley and analysed statistically to determine if soil
Geological and petrographic aspects of the calcarenitic facies in the Valley of the Temples of Agrigento (Central-Southern Sicily, Italy)
This paper contains the results of a geological and structural survey in the area of Agrigento and the Valley of the Temples. The main outcropping formation is characterized by a clayey-sandy pleistocenic sequence in which four calcarenitic bodies
Area of old hard rocks ; Czech Republic ; Fault ; Geomorphology ; Inselberg ; Tectonics ; Valley
Conspicuous Neogene tectonic forms, faultline valleys, fault-angle valleys, etc. were discovered in the SE marginal part of the Třebíč Massif. Relations between the Tertiary and older tectonics were studied. The regularity of special distribution
Geochronology of Bonney drift, Taylor Valley, Antarctica : evidence for interglacial expansions of Taylor glacier
This study focuses on glaciogenic sediments in Taylor Valley, which features Taylor Glacier, an outlet of the peripheral Taylor Dome of the East Antarctic Ice Sheet (EAIS). Here, the AA. present the geochronology of Bonney drift.
valleys, with fans at the outlet of the valleys. Valley form simulated by SIBERIA has been recognized in nature. This indicates that SIBERIA models natural processes efficiently. By modelling valley incision, decisions can be made on the depth of tailings
Environmental controls on the evolution of alluvial fans in Buena Vista Valley, North Central Nevada, during late Quaternary
This study evaluates the relative influences of the environmental factors on the evolution of alluvial fans in Buena Vista Valley, north-central Nevada. The objectives of this study include : delineating the surficial stratigraphy of the alluvial
regionally by Hawley and Wilson (1965); and, examining the driving forces of aggradation and entrenchment on alluvial fans in Buena Vista Valley.
Radiocarbon chronology of Ross Sea drift, eastern Taylor Valley, Antarctica : evidence for a grounded ice sheet in the Ross Sea at the Last Glacial Maximum
More than 250 radiocarbon dates of lacustrine algae and marine shells afford a chronology for Ross Sea drift in eastern Taylor Valley. Four major drift sheets in eastern Taylor Valley are differentiated. Evidence from ice-dammed lakes in Taylor
Valley and from shells from McMurdo Sound suggests grounding-line retreat from the vicinity of Ross island between 6500 and 8340 C 14 yr BP. Rising sea level may have triggered internal mechanisms within the ice sheet that led to retreat, but did
A three-dimensional assessment of the net volume of rock differentially eroded from below mountain tops to form valleys yields a range-wide constraint on feedback between valley development and the height of mountain peaks. The superelevation
of the range. It therefore appears that the location of the highest peak in the Olympics is controlled by the deep valleys excavated in the centre of the range.
Rapide development of ferricretes on a subtropical valley side slope
Iron-precipitation zones exposed by bluff retreat at Flanner Beach, North Carolina in 1996 had formed indurated ferricretes by 1998. This confirms the valley-side groundwater discharge model of ferricrete formation, and shows that, once the zone
Terrain analysis of the Racetrack basin and the sliding rocks of Death Valley
Années 1990 ; California ; Death Valley ; Domaine aride ; Eboulis ; El Niño ; Etats-Unis ; Géomorphométrie ; Playa ; Quaternaire ; Système d'information géographique ; Vitesse du vent
This paper reports on some of the chemical characteristics of late melt-season water from Kärkevagge (valley of the boulders) above the Arctic Circle in northern Sweden. These were measured in rain, late-lying snow, and water from the major stream
and lake, as well as from pond, tributary, and seep sources in the valley. A total of 71 samples was collected at 57 sites, in August 1996, for the purpose of characterizing the present weathering regime within this classic U-shaped glacial valley
Last century valley floor modifications of the Trigno river (Southern Italy) : a preliminary report
for the last decades significant modifications of the channel pattern and a marked reduction of the floodplain width, accompained by a progressive valley floor terracing due to channel bed lowering. Analyses of possible controls on river behaviour, both natural