We developed a geochemical atlas of the Colorado River in Grand Canyon and in its tributary, the Little Colorado River, and used it to identify provenance and habitat use by Federally Endangered humpback chub, Gila cypha. Carbon stable isotope ratios (δ(13)C) discriminate best between the two rivers, but fine scale analysis in otoliths requires rare, expensive instrumentation. We therefore corr...

The Fraser and Columbia River estuaries switch between two extremes of mixing on very small horizontal scales; over as little as tens of meters, conditions can vary between that of a highly stratified estuary and a well-mixed river. Over this transition, suspended particulate matter concentration (C) and settling rates (Ws) can also rapidly change. Understanding the sedimentological processes t...

The general biology and seasonal ecology of eels from a riffle section of the lower reaches of Ireland’s largest river system, the River Shannon, were investigated. Eels at this location occurred in high densities, had a slow growth rate and were predominantly male at maturation. Although they fed to some degree all year round, foraging activity of the eels was highest in the months of May to S...

That river systems are networks consisting of links and nodes is one of their most obvious characteristics. Despite the ubiquity of confluences and tributary networks, the first century of modern fluvial geomorphology paid little consistent attention to river junctions and the interactions between tributaries and the main stem (Kennedy, 1984). Important exceptions include classic contributions ...

1. introduction the analysis of drainage networks is a powerful tool to detect recent tectonic activity and uplift, as river channels are very sensitive to changes in the parameters that control their shapes and. climate changes, tectonics and lithology affect river equilibrium conditions and hence, river geometry. a river is in dynamic equilibrium when erosion keeps pace with sedimentation and...

Effluent discharges from municipal, industrial, and agricultural activities constitute major sources of pollution on land and water bodies. During the 1990s, large-scale application of Constructed Wetlands (CWs) as a remediation option drew much attention globally from the public and green groups alike. The most common application of CWs is for flow management in river system and little is docu...

Methylmercury (MeHg), dissolved organic carbon (DOC), and sulfate (SO(4)(=)) relationships were investigated in the mining-influenced St. Louis River watershed in northeast Minnesota. Fewer wetlands and higher SO(4)(=) in the mining region lead to generally lower availability and solubility of DOC in mining streams compared to non-mining streams. MeHg concentrations, however, are similarly low ...

Estimates of riparian vegetation water use are important for hydromorphological assessment, partitioning within human and natural environments, informing environmental policy decisions. The objectives this study were to calculate the actual evapotranspiration (ETa) (mm/day mm/year) derive annual consumptive (CU) in acre-feet (AF) select areas Little Colorado River watershed Navajo Nation, north...