This paper describes the relevant geomorphic features with special reference to river responses associated with active faults in Siang Valley of Arunachal Pradesh. The optically Stimulated Luminescence (OSL) dating is applied on the alluvial cover
Genesis of active sand-filled polygons in lower and central Beacon Valley, Antarctica
Antarctique ; Coin de glace ; McMurdo Dry Valleys ; Pergélisol ; Périglaciaire ; Région polaire ; Sol figuré ; Zone froide
In this study, the AA. describe and characterise sand-filled wedges and polygons and propose a descriptive model for their formation in lower and central Beacon Valley from detailed analysis of a 2-m resolution aerial photography and other
Anatolia ; Fault ; Fluvial terrace ; Geomorphogenesis ; Graben ; Isotope dating ; Meander ; Pleistocene ; Quaternary ; Tectonics ; Turkey ; Valley ; Vertical movement
and the rate of vertical displacement in Eskişehir region. The Porsuk River flows in a meandering valley incised mostly in an ancient fluvial plain. One abandoned meandering valley and two patchy but widespread terraces in the present meandering valley
Sediment storage and transport in Pancho Rico Valley during and after the Pleistocene-Holocene transition, Coast Ranges of central California (Monterey County)
climate of the Pleistocene-Holocene transition caused intense debris-flow erosion of PRC-tributary valleys. The influence of multiple mechanisms on sediment storage and transport in the Pancho Rico Valley-Salinas Valley system exemplifies the complexity
Thermal characterisation of active layer across a soil moisture gradient in the McMurdo Dry Valleys, Antarctica
Antarctique ; Bilan énergétique ; Changement climatique ; Dry Valleys ; Humidité du sol ; Modèle numérique ; Mollisol ; Périglaciaire ; Température du sol
Here, the AA. present results of a study to characterise soil thermal properties along a soil moisture gradient adjacent to Lake Fryxell in Taylor Valley, Antarctica. The goals were to characterise the thermal characteristics of these relatively wet
soils (compared to the rest of the McMurdo Dry Valleys landscape), and to assess the response of the active layer to possible increases in soil moisture. The AA. measured subsurfaces temperatures at depths from 3 to 50 cm at 4 locations along a natural
Irrigation agriculture and the sedimentary record in the Palpa Valley, southern Peru
This paper reports the results of sedimentological-pedological investigations in the Palpa Valley in the coastal desert of southern Peru, the northern extension of the Chilean Atacama, where sediment-laden river water is used for irrigation
. An adapted facies classification is used to deduce a generalised stratigraphical sequence of the valley bottom sediments. Chronological constraints from radiocarbon dating and archaeological finds are used to reconstruct sedimentation rates for fossil
to recent irragric anthrosols. Actualistic case studies are used to quantify present-day irrigation sedimentation. The investigations result in a clarification of the sedimentological and geomorphic history of this valley and a quantification of irrigation
A radar transparent layer in a temperate valley glacier : Bench Glacier, Alaska
Radar surveys of Bench Glacier, Alaska, collected over five field seasons between 2002 and 2006 reveal a surface layer of radar transparent ice in this temperate valley glacier. This transparent layer has similar radar characteristics to the cold
Railroad abandonment : a catalyst for urban renewal in the San Fernando Valley, California
, thus contributing to revitalization. The Burbank Branch line, located in the San Fernando Valley just north of Los Angeles, is examined as a case study.
A rockfall was triggered in the Tolminka valley at Polog in the beginning of May, 2004. Rockfall didn't endangered settlements or infrastructure, but it caused many disturbances in natural environment. After the rockfall we could observe many
impacts of rockfalls on the natural landscape. We put special emphasis on damming of the valley, filling up the lake with sediments from upstream of the rockfall and to the ratio between the rockfall slope and erosion of the river. - (L'A.).
New geoarchaeological investigations of the valley systems in the Aksum area of northern Ethiopia
Recent geoarchaeological investigations of the valley systems to the north and northeast of Aksum have revealed indications of a relatively recent alluvial sequence, probably within the last millennium. The implication is that both during and prior
colluvial and alluvial additions. In the last 4 to 5 centuries, the pace of alluvial aggradation appears to have increased markedly, and has deposited at least half of the sediment captured in the valley systems and lower slopes to the north of Aksum
Valley morphology and sediment cascades within a wetland system in the KawaZulu-Natal Drakensberg Foothills, eastern South Africa
, and proceeds, using observations from this and other similar wetland systems in the region, to discuss successive breaks in connectivity with increasing spatial scale and time. Implications for valley morphology are discussed, and channel incision is shown
to play an important role in long-term valley and wetland morphodynamics in certain geomorphological settings, creating a diversity of geomorphological features and hydrological regimes.
Bank-collapse processes in a valley-bottom gully, western Iowa
Freeze-thaw cycle ; Gully erosion ; Iowa ; Mass movement ; Meltwater ; Precipitation ; Underground water ; United States of America ; Valley ; Watershed
Widening and bank-slope reduction of a valley-bottom gully in western Iowa was correlated to increasing subsurface flow over a 36-year period. To study bank collapse at this gully, the AA. measured rainfall, air temperature, hydraulic head near
Quantifying sediment storage in a high alpine valley (Turtmanntal, Switzerland)
This study quantifies sediment deposits of different high alpine landforms in a meso-scale alpine catchment of the Swiss Alps (Turtmann Valley) by applying a combination of geophysical surveying and GIS modelling techniques at different scales. Mean
thickness values of each landform type calculated from these data was used to estimate the sediment volume in the hanging valleys and the trough slopes. Sediment volume of the remaining subsystems was determined by modelling an assumed parabolic bedrock
-Daban with volcanic plateau. This rift may be as a morphotype of dry rift basin of the Baikal type (rift valley) because it has a full set of their typical structural elements and their unified forms. Relief of the rift and its mountain surroundings
are composed of five belts: the belt of plains and the belt of tilted piedmonts, the apical belt, the belt of slopes, and the belt of valley bottoms in its mountain frame. Instead of them there is a large group of interzonal land forms.
Collapse structures ; Ebro ; Evaporite ; Mass movement ; Natural hazards ; Radar ; Remote sensing ; Spain ; Subsidence ; Valley
Differential Interferometric Synthetic Aperture Radar (DInSAR) has been applied to detect and measure different types of natural and human-induced ground deformation in a stretch of the Ebro River valley (Spain) excavated in salt-bearing evaporites