Several studies have indicated that certain pesticides are present in California rivers at levels which could be harmful to aquatic life. Generally, these studies have been conducted during certain seasons, but not year-round. Since yearround pesticide concentration data was limited for many California rivers having significant amounts of agricultural runoff, water was collected weekly from one...

I wish to congratulate William Evan Rivers, DO, and his coauthors 1 for their original contribution in the Novem-ber 2008 issue of JAOA—The Journal of the American Osteopathic Association. Although a small pilot study, the results of the research conducted by these individuals represent an enormous amount of time and dedication. The osteopathic medical profession needs more original research to...

The objective of this study was to investigate the possibility of a generic rating curve with a small number of adjustable parameters for the restricted class of bedrock step-pool rivers. The motivation for this study arose from Utah Valley University’s long-term program of groundwater development in the Trans-Mexican Volcanic Belt, which requires hydrographs for bedrock step-pool rivers near r...

1. Rivers are subject to thresholds of several types that define significant changes in processes and morphology and delimit distinctive riverine landscapes and habitats. Thresholds are set by the conditions that govern river channel process and form, amongst which the most important are the flow regime, the quantity and calibre of sediment delivered to the channel, and the topographic setting ...

We use archaeological data and spatial methods to reconstruct the dispersal of farming into areas of sub-Saharan Africa now occupied by Bantu language speakers, and introduce a new large-scale radiocarbon database and a new suite of spatial modelling techniques. We also introduce a method of estimating phylogeographic relationships from archaeologically-modelled dispersal maps, with results pro...

Background Bangladesh is basically a low lying flat land country, is endowed with enormous inland fishery resources which contribute a significant part of freshwater fish production. Inland fisheries in Bangladesh contain different types of water bodies’ character e.g. flowing rivers, beel—usually deeper depression in the floodplain, haor—extensive low lying areas comprising several perennial b...