Drought is the most significant constraint for crop production in arid and semi-arid regions. In order to assess drought tolerance in fifteen rapeseed (Brassica napus) cultivars using yield-based drought tolerance indices, two experiments were conducted at the research station of College of Agriculture, Shiraz University, Shiraz, Iran during 2009-2010 growing season. The cultivars 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-...

this study was conducted to determine taxonomic feature of fishes from the headwaters of three riverine systems in kohgiluyeh and boyer-ahmad province (k & b) in southwestern iran during 2011 to 2013. fifteen species belonging to 4 families, and 3 orders from the karun river system, 10 species belonging to 4 families and 3 orders from the zohreh river system and 8 species belonging to 2 fam...

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...

Floods have various impacts, including loss of life and damage to property. Flood- management reservoirs can help mitigate floods, but their operation also worsen flood impacts. This paper presents a novel forensic engineering approach assess the role reservoir on control. Fourteen criteria are employed for assessing forecast-based prereleases water from storage reduce impact flooding. The prop...