Abstract The current study tried to investigate the hydrodynamic characteristics and pollution mixing dispersion from sub-branch through river confluence using numerical model of Flow3D. A was used with length, width, height (7 × 1 1) m. Also, nested mesh in junction refine modeling result depiction. It observed that if there is a water level difference on both sides junction, will occur much f...

some biological characteristics of broodstock and juvenile kutum, rutilus kutum. were investigated using data collected from the estuaries of tajen and shirood rivers (tr and sr) (southern caspian sea basin) as well as from the caspian sea in 2012. the results showed higher condition factors (cf) in the male broodstocks kutum than those estimated in the female broodstock of both tr and sr. the ...

Abstract Assessment of Manning’s unevenness factor is critical significance in hydraulic readings open channel stream. ( n n ) obligatory for the computation releases, water levels, and backwater curves, as well plan curve additions. The correct value roughness coefficient ), i. H. a that accurately reflects observed d...

Decisions about flood risk management are usually based on the reduction in flood risk compared to the implementation costs of the strategy. It is common practice to express flood risk (the combination of flood probabilities and potential flood damages) into a single number. The downside of this approach is that explicit information about how the system responds to the whole range of possible d...

A large amount of accurate river cross-section data is indispensable for predicting river stages. However, the measured river cross-section data are usually sparse in the transverse direction at each cross-section as well as in the longitudinal direction along the river channel. This study presents three algorithms to resample the river cross-section data points in both the transverse and longi...

The Seine river watershed is characterized by a high population density and intense agricultural activities. Data show low microbiological water quality in the main rivers (Seine, Marne, Oise) of the watershed. Today, there is an increasing pressure from different social groups to restore microbiological water quality in order to both increase the safety of drinking water production and to rest...