scholarly journals Numerical Modelling of Heavy Metals Transport Processes in Riverine Basins

10.5772/35931 ◽  
2012 ◽  
Author(s):  
Seyed Mahmood ◽  
Ali Roshanfekr
Keyword(s):  
Heavy Metals ◽  
Numerical Modelling ◽  
Transport Processes

Numerical modelling of flow and transport processes in a calciner for cement production

2007 ◽  
Vol 171 (2) ◽  
pp. 81-95 ◽  
Author(s):  
D.K. Fidaros ◽  
C.A. Baxevanou ◽  
C.D. Dritselis ◽  
N.S. Vlachos
Keyword(s):  
Numerical Modelling ◽  
Transport Processes ◽  
Cement Production ◽  
Flow And Transport

Emissions of heavy metals into river basins of Germany

2003 ◽  
Vol 47 (7-8) ◽  
pp. 251-257 ◽  
Author(s):  
U. Scherer ◽  
S. Fuchs ◽  
H. Behrendt ◽  
T. Hillenbrand
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Urban Areas ◽  
Municipal Wastewater ◽  
River Basins ◽  
Large River ◽  
Transport Processes ◽  
Point Sources ◽  
Geographical Information ◽  
Large River Basins

The input of seven heavy metals (Cd, Cr, Cu, Hg, Ni, Pb and Zn) into the large river basins of Germany via various point and diffuse pathways were estimated for the period of 1985 through 2000. To quantify the emissions via point sources a nationwide survey on heavy metal data of municipal wastewater treatment plants and industrial direct discharges was carried out. The input via diffuse pathways was calculated using an adapted version of the model MONERIS. This model accounts for the significant transport processes, and it includes a Geographical Information System (GIS) that provides digital maps as well as extensive statistical information. For a comparison of the calculated heavy metal emission with the measured heavy metal load at monitoring stations the losses of heavy metals due to retention processes within the river systems have to be considered. Therefore heavy metal retention was calculated according to the retention functions given by Vink and Behrendt. For the large river basins a good correspondence could be found between estimated and measured heavy metal loads in rivers. The total emission into the North Sea decreased for each metal during the period of 1985 to 2000. The reduction varies between 87% for Hg and 41% for Ni mainly caused by the decline via point sources. Today's emissions of heavy metals into river basins of Germany are dominated by the input via diffuse pathways. The most important diffuse emission pathways are “paved urban areas” and “erosion”.

scholarly journals Numerical modelling of hydrodynamics and sediment transport processes during storm events in a non-perennial river

2010 ◽  
Vol 58 (1) ◽  
pp. 36-48 ◽  
Author(s):  
Raaj Ramsankaran ◽  
Christian Maerker ◽  
Andreas Malcherek
Keyword(s):  
Sediment Transport ◽  
Numerical Modelling ◽  
Hydrodynamic Model ◽  
Transport Processes ◽  
Bed Load ◽  
Experimental Measurements ◽  
Storm Events ◽  
Practical Applications ◽  
Load Transport ◽  
Load Sediment

Numerical modelling of hydrodynamics and sediment transport processes during storm events in a non-perennial riverThis article presents the numerical modelling of hydrodynamics and sediment transport processes in the seasonal Pathri Rao River, which flows in the Northern part of India. Modelling is made by the coupled application of the hydrodynamic model called TELEMAC-2D and the morphodynamic model called SediMorph. The hydrodynamic model results are validated with the observed data and it has been found that the present model provides reasonable predictions. Likewise, the validation of the morphodynamic model is also presented. For this purpose, the suspended and bed load transport modules are validated separately for four runoff events observed during the investigations. The validation of the former is approached by comparing the depth-averaged suspended transport concentrations against experimental measurements made at the make-shift gauging station and subsequent comparison against experimental measurements. On the other hand, due to non-availability of the observed values on bed load sediment transport, the bed load sediment transport and bed evolution numerical results could not be validated quantitatively and was approached only on qualitative basis. In general, both validations present an acceptable agreement with measurements and scientific facts. Further, this study demonstrates that the coupled TELEMAC-2D/SediMorph system could be used with confidence for practical applications in the Pathri Rao River.

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