A common approach used to mitigate riverbank erosion and maintain watercourse alignments has been through the application of riprap or larger, more stable particles channel boundaries along reaches interest. However, very often, these large become dislodged from their intended locations (failed measures), becoming part bed material composition. In natural systems, immobile sediments boulders ca...

Future developments in AI and robotics, brain interfaces, the Internet and virtual and augmented reality, will make possible new types of integration of humans and machines which will change how we think, learn and live. This paper uses a story about a future scenario involving systems of this kind to respond to crises and disasters to explore the possibilities of collective intelligence and co...

Significant concentrations of oxalate (dissolved plus particulate) were present in sediments taken from a diversity of aquatic environments, ranging from 0.1 to 0.7 mmol/liter of sediment. These included pelagic and littoral sediments from two freshwater lakes (Searsville Lake, Calif., and Lake Tahoe, Calif.), a hypersaline, meromictic, alkaline lake (Big Soda Lake, Nev.), and a South San Franc...

the parameters used to determine the trophic state of a water body are: total phosphorus (tp),transparency (secchi disk depth) and chlorophyll a. however, these parameters show strong seasonalfluctuations which may hinder the estimation of trophic state. some authors have proposed that sediments be used as an additional tool to evaluate the trophic state of a water body. the aim of this study w...