A note on the vertical distribution of boulder fields in the archipelago of Åland (Ahvenanmaa)
Boulder field ; Coastal environment ; Fluvioglacial features ; Periglacial features ; Sea level ; Sedimentary ; Spatial distribution ; Sweden
The distribution of boulder fields situated in three different parishes in Åland is discussed. It has been found that the majority of the boulder fields are situated at altitudes that correspond to Ancylus-transgressions and an early Litorina
Paleoclimatic field studies in and along the Qinling Shan (Central China)
This article gives a survey of the question of Pleistocene glaciations in the area of the Loess Plateau (Central China) and the results of the latest field investigations in the years 1989 and 1993.
Diurnal freeze-thaw depth in rockwalls: field measurements and theoretical considerations
but both diurnal and seasonal freezing occur. Diurnal frost and thaw depths were determined from the field data and compared with the theoretical values calculated by the modified Berggren equation. The seasonal frost depth, which could not be directly
determined from the field data, was also estimated on the basis of the analysis of the diurnal freeze-thaw depths.
This study of consumption extends the field of enquiry to include the full range of goods and services consumed by households rather than concentrating upon the narrower field of mass produced articles which has been the concern of those
are derived from field surveys conducted in two relatively large ria-type estuaries (Raritan Bay and Delaware Bay) on the northeastern coast of the United States. A generic classification is presented for typical dune forms, identifying their dimensions
A field test of Tubino's (1991) model of alternate bar formation
This study investigates the fluvial dynamics of straight natural stream channels. In particular, this experimental field study quantitatively assesses a physically based non-linear mathematical theory of alternate bar formation under unsteady
The use of topographic scale models in predicting eolian dust erosion in hilly areas: field verification of a wind tunnel experiment
Eolian erosion of natural dust in an area of 53 ha, situated in the northern Negev Desert, is investigated both in the wind tunnel (erosion simulations on a topographic scale model) and in the field. The wind tunnel results and the field results
The present study adresses to the questions how the shoreface-connected ridges along the central part of the Dutch coast were formed and what their behaviour is under the present hydrodynamic conditions. The study is based on field observations
and model computations. The field observations focus on the present hydrodynamic and sediment transport processes, on the resulting morphological and sedimentological response, and on the geologic evolution of the ridges. - (AGD)
Vegetation types in this zone in the Department of La Paz east of Lake Titicaca includes scrub forest, grassland, rock and boulder fields, wetlands and agricultural and ruderal fields. Strong human impact is said to explain most of these vegetation
Colluvial boulder fields are ubiquitous on desert hillslopes in the Basin and Range Province. Five chronometric methods indicate that colluvial boulder fields in this region have been active in the late Pleistocene and Holocene. A new method
is presented to constrain the ages of colluvial boulder fields, using the presence of stable rock varnish and 36Cl. Rather than interpreting colluvial deposits from the traditional desert geomorphology framework of relict or active, the AA. suggest
Different field measurements based on soil mapping were performed to assess the erosion intensity of the area. Landsat digital data were used to calculate the C and K factors of the Wischmeier-Smith formula. These results were compared with field
measurement data. The factors of USLE were stored and processed using a GIS. The field measurement results and the values of soil erosion estimated by the Wischmeier-Smith formula were compared. An estimate of the intensity of soil erosion by distinctive
a vegetated NNE aspect and severely eroded SSW slope, with a sub-horizontal basal pediment. Field rainfall and runoff experiments were carried out. Field results were substantiated by data collected in specially devised laboratory tests. Discussion
Forest, soil, rice, weeds and regrowth were studied in the fields off local farmers in permanent plots during 2-5 years. The fields covered all currently cultivated soil types and forest types. This study is concerned with the full shifting
Textural analyses were conducted in order to quantify the soil status in two nearby fields with 80 m and 200 m spacing of shelter hedges with unequal wind exposure and within the fields themselves. Chosen soil status indicators are the content
-natural grassland, limestone pavement and ancient field boundaries have been replaced by uniform grassland fields. The great increase in fertiliser and silage usage may pose a threat to groundwater quality in the area.
Recent field research and modeling experiments by the AA. suggest that Würm glaciation of Tian Shan Mountains had much larger extent than it was previously believed. Their reconstruction is based upon glacio-geomorphological evidence. Their data
: with a gradual and with an abrupt change in snow-line elevation. It yielded ice-marginal positions which agreed with the field observations.
vegetation was described at 33 field plots using four quantitative methods. After radiometric correction of the image, the spectral TM bands were processed following three different methods. A conclusion is that a balance has to be found between the more
accurate, but time-consuming field surveys to gather information on erosion-controlling factors and a loss of accuracy with the use of quick remote sensing methods.