Vegetation was added to a fully developed sandy point bar in the meander of a constructed stream. Significant changes in the flow structure and bed topography were observed. As expected, the addition of vegetative resistance decreased the depth-averaged streamwise velocity over the bar and increased it in the open region. In addition, the secondary circulation increased in strength but became c...

Field investigations at Dugway Proving Ground in western Utah have produced new data on the chronology and human occupation of late Pleistocene and early Holocene lakes, rivers, and wetlands in the Lake Bonneville basin. We have classified paleo-river channels of these ages as “gravel channels” and “sand channels.” Gravel channels are straight to curved, digitate, and have abrupt bulbous ends. ...

The Psi-s plot represents the geometry of a line by determining Psi, the orientation angle or heading, at points along the line, and plotting that value against s, the cumulative curvilinear distance along the line. No matter how convoluted the line is, the Psi-s plot will be a single-valued function of s; it is much easier to parameterize such a single-valued function. Straight lines on the Ps...

Background: Health equity is “having fair access to healthcare, utilizing it according to actual needs, paying for it based on financial capacity and finally, having an acceptable level of health”. Health equity is an underlying principle of the universal declaration of human rights. Equitable distribution of hospital beds increases people’s access to healthcare services and as a result, improv...

We review a number a recent advances in the study of two-dimensional statistical models with strong geometrical constraints. These include folding problems of regular and random lattices as well as the famous meander problem of enumerating the topologically inequivalent configurations of a meandering road crossing a straight river through a given number of bridges. All these problems turn out t...

Tropical rivers provide about 60% of the global transport of organic and inorganic carbon from continents to the coastal zone. These inputs combine with organic material from productive mangrove forests, seagrass beds, and coral reefs to make tropical coastal ecosystems important components in the global carbon cycle. Carbon exchange has been measured over multiple spatial scales, ranging from ...

[1] Hydrodynamic exchange between a stream and its bed plays an important role in solute transport in rivers. Stream-subsurface exchange is known to occur due to several different mechanisms and different approaches have been used to model the resulting solute transport, but there has been little investigation of the ability of the various models to represent specific exchange processes. This w...

a total of 3528 specimens of freshwater turtles belonging to two families viz., geoemydidae (brown river turtle, kachuga smithi; indian saw-backed turtle, k. tecta; brahminy rrive turtle, hardella thurgi; spotted pond turtle, geoclemys hamiltonii) and trionychidae (indian soft-shell turtle, aspederates gangeticus; peacock soft-shell turtle, a.hurum; narrow-headed soft-shell turtle, chitra indic...

Abstract The existence of ancient fluvial systems on Mars is widely accepted, but little known about how quickly they formed, or what environmental conditions controlled their evolution. We analyzed a sequence well-preserved inner-bank bar deposits within the meander bends multistacked sinuous ridge in Aeolis Dorsa and compared them to similar features Earth establish required for formation. Ou...

One special focus of ESAs ERS ENVISAT Tandem (EET) Campaigns were high northern latitudes. Considering the good potential of EET Crossinterferometry (CInSAR) for DEM generation over relatively flat areas, one objective was to fill the gap in the SRTM DEM coverage at latitudes above 60 deg. North. To address this topic, develop methodologies, and asses potential and limitations we investigated s...