garra rufa , a bottom dwelling freshwater fish and native to the middle east, is distributed in the southwestern of iran and the tigris basin. considering the importance of length-weight relationships data of a species in different habitats, the length-weight relationship of g. rufa from 13 rivers in the persian gulf and the tigris basins was explored. the value of exponent b ranged from 2.74 t...

Members of Nemacheilidae Family, Turcinoemacheilus genus were subjected to molecular phylogenetic analysis in this study. This genus was reported in 2009 to inhabit in Karoon River drainage, in contrary to previous assumption that it was the endemic species in the Basin of Tigris River. It was sampled from three stations placed in different tributaries in Karoon drainage and evaluated to unders...

the present study was conducted to provide a detailed descriptive osteology of barbus cyri from southern caspian sea for the first time and comparing it with those of b. lacerta from the tigris and urmia lake basins. for this purpose, twelve specimens of b. cyri were collected from safidrud river using electrofishing device and fixed in 10% buffered formalin. then, the specimens were cleared an...

The project appraisal method in the Netherlands distinguishes direct effects, indirect distribution effects and indirect generative effects. In general transport models are available for calculating the benefits of transport projects to travellers as part of the direct effects. The TIGRIS XL model, a Land-Use and Transport Interaction model, adds indirect distribution effects for the housing an...

in this study, by examining the character of the morphometric and meristic characters of garra variabilis samples which is obtained from different locality in tigris river, morphometric characters which are transformed, subjected to discriminant analysis and depending on grouping model, number of discriminant functions and according to importance of these in terms of explaining total variance, ...

in this study 485 specimen of garra rufa (heckel, 1843) from 29 populations from six river systems and basins including tigris, karkheh, karun, persis (helleh and mond), hormuz and maharlu were collected by a 5mm mesh sized seine net, anesthetized in 1% clove oil solution, fixed in 10% formalin and transferred to the laboratory for further investigations. some 28 morphometric, 25 morphometric p...

A Geographic Information System (GIS) requires both interactive edit/query, and power-ful spatial analysis capabilities -for large volumes o-f geographic data. This spatial analysis requirement has led to the investigation o-f the mathematical -field o-f topology. The major problems o-f previous topological systems have been the construction o-f a logically consistent topological structure and ...

The essential objective of this study is the development an appropriate model to obtain low cost optimization design sewage network. complexity and huge number discrete non-linear constraints in problems system make their treatment important. For aim, adaptive Genetic Algorithm (GA) efficient effective with a consistent layout proposed. MATLAB code was used optimize network for Al Jafriya neigh...

Abstract The influence of Karun river inflow on salinity intrusion from the Arabian Gulf towards upper reaches Shatt Al-Arab estuary was evaluated by using Mike11, a one-dimensional numerical modeling technique. simulations results indicated that, during moderate and low flow conditions river, freshwater at 10 40 m 3 /s, respectively, could be capable keeping extent to not exceeded confluence l...

Abstract In the province of Maysan, Al Butera River is one most significant tributaries Tigris River. It has a length 48.8 km and reaches Central Marshes in south Maysan from downstream Regulator. Villages farmland suffer significant. The purpose this project to examine enhance River, which suffered harm sedimentation bank encroachment, particularly during flooding April 2019.. Using available ...