Airborne Laser Scanning or LiDAR data are widely used nowadays in river valleys for topography and hydro-morphology. However, the large data sets of unprocessed 3D point clouds require some challenging treatment and end-users may prefer to deal with DTMs (Digital Terrain Models) derived from LiDAR surveys. Without any complementary data (such as field survey or photographs) detecting position a...

An abandoned stream valley, here called Florence Valley, was found in eastern Erie County, Ohio. Florence Valley is about one mile long and connects the valleys of Chappel Creek and the Vermilion River. There is evidence that Florence Valley was formed as a result of the capture of a tributary of the Vermilion River by Chappel Creek. Chappel Creek, at the junction of Florence Valley and the val...

Alpine landscapes have evolved rapidly over the last two centuries. River embankments and urbanization have aff ected most of the large alluvial plains, agriculture has radically changed and its relative landscapes also. Forests are gaining space in most of the Alpine countries and tourism has modifi ed landscapes in several areas, both in alpine forelands and high valleys. In Switzerland, the ...

In this paper, we propose a new methodology for extracting river networks from satellite images. It combines morphological generalised geodesic transformations with hydrological overland flow simulations. The method requires the prior generation of a geodesic mask and a marker image by applying a series of transformations to the original image. These images are then combined so as to produce a ...

A 7000-year record of sediment accumulation from the San Bernardino ciénega in southeastern Arizona/northeastern Sonora records changes in effective moisture. Periods of rapid sedimentation between ca. 700 to 1100 cal yr BP and ca. 4100 to 4400 cal yr BP at San Bernardino are associated with a highstand at pluvial Lake Cochise, the presence of aquatic pollen taxa in New Mexican packrat middens ...

The Densu River Basin has come under serious threat from a number of human activities such as farming, lumbering, sand winning, animal grazing, dam construction among others. These activities have significant implications on the fluvial processes of the river such as erosion, braiding and flooding. The study examined the current fluvial processes and landforms and the dynamics in the river morp...

The Lower Acheulian site of Ambrona (Fig. 1A)–like the Torralba site 2.5 km south–occupies a singular position in the NW Iberian Range due to its relation with an Tertiary and Quaternary karstic landscape and with three large hydrographic basins of the Iberian Peninsula: those of the rivers Duero and Tajo (both Atlantic) and the Ebro-Jalón Mediterranean basin. Since the Lower Pleistocene, the r...

In the BC central interior, fine-textured glaciolacustrine sediments are an important soil parent material on many productive forest sites, particularly along major river valleys such as the Fraser and Nechako. With easy proximity to major transportation routes and wood processing facilities, many such sites were harvested early in the history of logging in this region, long before the advent o...

[1] The sculpture of valleys by flowing water is widely recognized, and simplified models of incision by this process (e.g., the stream power law) are the basis for most recent landscape evolution models. Under steady state conditions a stream power law predicts that channel slope varies as an inverse power law of drainage area. Using both contour maps and laser altimetry, we find that this inv...

Blastomycosis is a fungal disease endemic to the Mississippi and Ohio River valleys and to the southeastern United States [1 ]. From the time blastomycosis was first isolated from the skin by Gilchrist in 1896 [2] , numerous epidemiologic, laboratory, and clinical data have been collated in an attempt to fully define this disease process. There is wide variability in the clinical presentation, ...