Rivers are discussed as sources of water supply for various uses including agriculture, industry anddrinking. Thus, monitoring the quality of these resources due to the recent drought and urban and ruraldevelopment is one of the important tasks in the field of environmental management. In this study,nine stations sampled seasonally the Karoon river, Dez, Karkheh in a one-year period from Octobe...

Due to existence of uncertainties in input geometrical properties of fractures, there is not any unique solution for assessing the stability of slopes in jointed rock masses. Therefore, the necessity of applying probabilistic analysis in these cases is inevitable. In this study a probabilistic analysis procedure together with relevant algorithms are developed using Discrete Fracture Network-Dis...

Background & Aims of the Study: The current study was designed to determine the quality of sediments in Karun in Ahvaz, Iran, according to aquatic pollution indices. Materials and Methods: The sediment samples were obtained from six river stations in summer and winter. The sediment samples were air-dried, sifted, homogenized, and stored in plastic bags, and the concentrations of metals were...

In this study, a novel least square support vector machine (LSSVM) model integrated with gradient-based optimizer (GBO) algorithm is introduced for the assessment of water quality (WQ) parameters. For purpose, three stations, including Ahvaz, Armand, and Gotvand in Karun river basin, have been selected to electrical conductivity (EC) total dissolved solids (TDS). First, prove superiority LSSVM-...

drought is a natural hazard that has significant impact on economic, agricultural, environmental, and social aspects. in the present study details analysis of rainfall data has been carried out for the years 1981-2011. standard precipitation index (spi) has been used to evaluate the precipitation deficit in the karun watershed of iran. the results indicated that 1981-82,82-83,83-84,84-85,88-89,...

elymais regions include the elevated plains and valleys of bakhtiary mountains in east of karun river and in fact it is the northeast of khozestan province. although the exact determining of the region extend is difficult but during its life the extend has changed in terms of the new conquests of parthians and some more or less important parts of elymais were dominated by small neighboring stat...