s: Calculation of sediment load through Rivers is one of basic issues through designing of Hydraulic structures. Studies about possibility of dam hydro and power plant and other hydraulic structure without consider of sedimentation behavior has very important role practically. Some empirical experience has been presented experimentally, defining and modifying of these equations and presentation...

One of the most important subjects in relation of water resources quality in the many of river is the chemical composition of waters and conservation of water quality in the watershed. Geological formations in any region of the earth are the main surface and foundation that water flows on the bed and strata of formation, which in fact they affect their characteristics on water quality as positi...

the algae of gargar river (one of branches of karoon river) which were investigated in samples collected from habitats (epilithic, epiphytic, epipelic) at eleven station between december 2004 and september 2005.this river receive types of sewage such as municipal wastewater, agriculture and aquaculture wastewater the flora consisted of 5 class and 24 genera belonging to the bacillariophycea (12...

Power supply is a key issue for decision-makers. The reservoir operation of multi-reservoir systems an important aspect to consider in efforts increase power generation. This research studies system comprising the Khersan-I (KHI), Karoon-III (KAIII) and Karoon-IV (KAIV) with intent being To achieve this, Two-Point Heading Rule was integrated new optimization algorithm, namely Seagull Optimizati...

A simple, sensitive and rapid method for determination of trace amounts of nitrite ion in real samples is reported. The reaction is initiated by adding known volumes of a nitrite ion solution of identified concentration to acidic solutions of thionine which causes decolorizaiton of reagent with time. The absorbance changes is then monitored spectrophotometrically at l...

a simple, sensitive and rapid method for determination of trace amounts of nitrite ion in real samples is reported. the reaction is initiated by adding known volumes of a nitrite ion solution of identified concentration to acidic solutions of thionine which causes decolorizaiton of reagent with time. the absorbance changes is then monitored spectrophotometrically at lmax = 602nm at 25 °c. calib...

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Introduction: Soil has an important role in nutrient cycle and an important function in storage, refinement, and movement of nutrients for the living and non-living parts. Soil pollution of heavy metals and elements is one of the common pollution impacts of human activities, especially industry. Realization of distribution pattern of these elements and their anthropogenic sources is a major par...