Fresh Water Rivers are one of the most important aquatic ecosystems in arid and semi-arid regions of Iran in point of biodiversity and drinking water views. Damghanroud River is one of these rivers at Semnan province that during past years has been threatened by drought and anthropogenic pollutions. This river supplies some parts of drinking water of Damghan city and some vicinity villages. The...

Aquatic ecosystems are major sinks for pollutants which can have adverse effects on biodiversity. Thus, it is important to understand the nature of pollution-induced change in aquatic ecosystems. We show that brown bullheads (Ameiurus nebulosus) may have evolved in response to chronic pollution exposure. We collected adults from the Detroit River (polluted site) and Belle River (control site). ...

In Ni and Wang (2007) two solutions are given to determine the division of the cost of cleaning a river among the agents located along the river. For each solution the authors give three different motivations, namely (i) an axiomatic characterization, (ii) the solution is the Shapley value of an appropriately defined cooperative TU-game, and (iii) the solution belongs to the Core of the associa...

A 5 km stretch of the river Przemsza, in southern Poland, was investigated with the aim of finding out if a gradient of metal pollution was present along the river and to determine the bioavailable flow of Cd, Pb and Zn between water, sediment and submerged macrophytes. In situ experiments in pots as well as experiments in sealed jars were performed by using Potamogetonpectinatus and Myriophyll...

n agents located along a river generate residues that then require cleaning to return the river to its natural state, which entails some cost.We propose several rules to distribute the total pollutant-cleaning cost among all the agents. We provide axiomatic characterizations using properties based on water taxes. Moreover, we prove that one of the rules coincides with the weighted Shapley value...

Thraulodes quevedoensis new species (type locality: Quevedo, Ecuador) is described from adults and nymphs. This species was found in a moderately polluted river running through a highly altered agricultural and urban landscape of western Ecuador.

In this study we have worked on the evaluation of heavy metal contamination in the sediments taken from the Tisza River and its tributaries, and thereby used the sequential extraction method, geochemical normalization, the calculation of the enrichment factor (EF), and the methods of statistical analysis. The chemical fractionation of Ni, Cu, Zn, Cr, Pb, Fe, and Mn, carried out by using the mod...

River water is a very important natural resource of water for meeting the requirements of various sectors in the world and for this reason cannot be looked upon in isolation [1]. The Hasdeo River is second largest tributary of the Mahanadi River system in East Central India. Hasdeo River in Chhattisgarh is influenced by the various problems imparted by excessive industrialization, urbanization ...

Abstract Shahdadroud River is one of the most important rivers in Kerman province that during previous years has been threatened by drought and anthropogenic pollution. This river supplies some parts of drinking water of Kerman city and some vicinity villages. The main objective of the present study is consideration of pollution situation of the river; for this purpose, limnological and biolo...