Corrosion and deposition in Karoon River, Iran, based on hydrometric stations

Author(s):  
Mehdi Derakhshannia ◽  
Shahab Dalvand ◽  
Behrouz Asakereh ◽  
Kaveh Ostad Ali Askari
Keyword(s):  
2010 ◽  
Vol 7 (2) ◽  
pp. 123-136
Author(s):  
Seyed Abdolsaheb Mortezavizadeh ◽  
Seyed Ahmadreza Hashemi ◽  
Golam Reza Eskandary

2015 ◽  
Vol 17 (1) ◽  
pp. 109-120
Author(s):  
Zahra Khoshnood ◽  
Reza Khoshnood

Abstract In 2009, 36 fish were sampled from two stations in the Karoon River near an industrial site. Two species of fish, Barbus grypus and Hypophthalmichthys molitrix were analyzed for total mercury (Hg) concentration in liver and muscle tissues. The average concentrations of total Hg in liver of B. grypus were 18.92 and 10.19 μg.g-1 in stations 1 and 2 respectively. The corresponding values for total Hg in edible muscle of Barbus grypus were 8.47 and 0.08 μg.g-1. The average concentrations of Hg in the liver of H. molitrix were 25.49 and 12.52 μg.g-1 in stations 1 and 2 respectively. The values for H. molitrix were 11.88 and 3.2 μg.g-1 in station 1 and station 2 respectively. The results showed that the bioavailability of Hg has increased considerably after industrialization and that these values were higher than the standard values as a result of anthropogenic activities in the region.


2007 ◽  
Vol 134 (1-3) ◽  
pp. 305-312 ◽  
Author(s):  
K. Naddafi ◽  
H. Honari ◽  
M. Ahmadi

Geomorphology ◽  
2018 ◽  
Vol 304 ◽  
pp. 30-39 ◽  
Author(s):  
Saleh Yousefi ◽  
Somayeh Mirzaee ◽  
Saskia Keesstra ◽  
Nicola Surian ◽  
Hamid Reza Pourghasemi ◽  
...  

2012 ◽  
Vol 60 (1) ◽  
pp. 16-32 ◽  
Author(s):  
Hamid Shahraiyni ◽  
Mohammad Ghafouri ◽  
Saeed Shouraki ◽  
Bahram Saghafian ◽  
Mohsen Nasseri

Comparison Between Active Learning Method and Support Vector Machine for Runoff ModelingIn this study Active Learning Method (ALM) as a novel fuzzy modeling approach is compared with optimized Support Vector Machine (SVM) using simple Genetic Algorithm (GA), as a well known datadriven model for long term simulation of daily streamflow in Karoon River. The daily discharge data from 1991 to 1996 and from 1996 to 1999 were utilized for training and testing of the models, respectively. Values of the Nash-Sutcliffe, Bias, R2, MPAE and PTVE of ALM model with 16 fuzzy rules were 0.81, 5.5 m3s-1, 0.81, 12.9%, and 1.9%, respectively. Following the same order of parameters, these criteria for optimized SVM model were 0.8, -10.7 m3s-1, 0.81, 7.3%, and -3.6%, respectively. The results show appropriate and acceptable simulation by ALM and optimized SVM. Optimized SVM is a well-known method for runoff simulation and its capabilities have been demonstrated. Therefore, the similarity between ALM and optimized SVM results imply the ability of ALM for runoff modeling. In addition, ALM training is easier and more straightforward than the training of many other data driven models such as optimized SVM and it is able to identify and rank the effective input variables for the runoff modeling. According to the results of ALM simulation and its abilities and properties, it has merit to be introduced as a new modeling method for the runoff modeling.


Water ◽  
2017 ◽  
Vol 9 (12) ◽  
pp. 965 ◽  
Author(s):  
Mohammad Keikhosravi Kiany ◽  
Seyed Masoodian ◽  
Robert Balling ◽  
Bohumil Svoma

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Farzin Salmasi ◽  
Ahmad Ayaseh ◽  
Ali Hoseinzadeh Dalir ◽  
Hadi Arvanaghi

AbstractIn this study, flow pattern in Beshar River as a main branch of Karoon River has been analyzed using CCHE2D. For this purpose, a 12-km reach upstream of Shahmokhtar hydrometric station near Yasuj city was considered. The CCHE2D model was calibrated using different Manning’s roughness coefficients and different turbulent models; for this purpose, numerical results were compared with observation data for three different discharges. The results showed that for the medium and high discharges, less Manning’s roughness coefficients (0.015 ≥ n ≥ 0.025) and for low discharge, higher Manning’s roughness coefficients (0.035 ≤ n ≤ 0.050) are more suitable. Also, k–ε turbulent model is more effective in this study. Besides, variations of hydraulic parameters like water depth, velocity, shear stress and Froude number are calculated and discussed. The analysis of the flow and velocity pattern in the straight and meander reaches of the river shows that the changes trend of the water surface gradient and velocity in the cross sections of this two reaches are different. Due to effect of secondary currents, latitude gradient of the water surface and depth average velocities increase to the outer bank of the bend. But in the straight reach, latitude gradient of the water surface is almost zero and the maximum velocities are in the center-line of flow. The R-squared (RSQ) and linear correlation coefficient (r) factors between velocity and shear stress show that there is linear and direct relationship between these two hydraulic parameters in the entire study reach.


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