نتایج جستجو برای: discharge coefficient

تعداد نتایج: 268903  

Journal: :Journal of Applied Research and Technology 2005

Journal: :Applied Water Science 2022

Abstract Gabion weirs are environment-friendly structures widely used for irrigation and drainage network purposes. These structures' hydraulic performance is fundamentally different from solid weirs' due to their porosity the existence of a through-flow discharge. This paper investigates reliability suitability number Machine learning models estimation gabion weirs. Generally, three Boosting e...

Journal: :محیط شناسی 0
علی جعفری دانشجوی دکتری برنامه ریزی محیط زیست، دانشکدة محیط زیست، دانشگاه تهران مسعود طاهریون دانشجوی دکتری مهندسی محیط زیست، دانشکدة محیط زیست، دانشگاه تهران احمدرضا یاوری دانشیار گروه برنامه ریزی و مدیریت محیط زیست، دانشکدة محیط زیست، دانشگاه تهران اکبر باغوند دانشیار گروه برنامه ریزی و مدیریت محیط زیست، دانشکدة محیط زیست، دانشگاه تهران

water quality trading is a new approach in pollution control which satisfies water quality standards suggesting minimum cost solutions. this method uses tradable discharge permits based on pollution transfer coefficient in a river. this paper tries to establish a water quality trading program in a river basin according to transfer coefficients between pollution sources and evaluate cost effecti...

ژورنال: علوم آب و خاک 2002
تورج هنر, , علیرضا کشاورزی, , محمود جوان, ,

Side weirs as flow diversion devices are widely used in irrigation, land drainage and urban sewage systems. In the present study, the effects of the length and height of inclined side weir crest on discharge coefficient were investigated in prismatic and nonprismatic rectangular channels.. In this study, 675 laboratory tests were conducted. Analysis of experimental tests showed that the disch...

تورج هنر, , علیرضا کشاورزی, , محمود جوان, ,

Side weirs as flow diversion devices are widely used in irrigation, land drainage and urban sewage systems. In the present study, the effects of the length and height of inclined side weir crest on discharge coefficient were investigated in prismatic and nonprismatic rectangular channels.. In this study, 675 laboratory tests were conducted. Analysis of experimental tests showed that the disch...

Journal: :civil engineering infrastructures journal 0
mojtaba saneie research deputy of soil conservation and watershed management research institute jalal sheikhkazemi msc. hydraulic structure engineering, faculty of civil engineering, university of sistan & baluchestan mehdi azhdary moghaddam associate prof., faculty of civil engineering, university of sistan & baluchestan, zahedan, iran

dam spillways are the structures that lead rightly and safely the outflow downstream, so that the dam integrity can be guaranteed. many accidents with dams have been caused by an inadequate spillway design or insufficient capacity. to accurately respond the hydraulic spillways, designers use physical modeling for designing this kind of structures. the scale effect in the spillway modeling, as a...

2013
M. R. Mustafa M. H. Isa R. B. Rezaur

Prediction of highly non linear behavior of suspended sediment flow in rivers has prime importance in the field of water resources engineering. In this study the predictive performance of two Artificial Neural Networks (ANNs) namely, the Radial Basis Function (RBF) Network and the Multi Layer Feed Forward (MLFF) Network have been compared. Time series data of daily suspended sediment discharge ...

In this study electrical discharge process was used to increase surface wear resistance of pure aluminum. Pulse-on-time and pulse current were considered as input parameters of the electrical discharge process. Experimental results reveal that the electrical discharge process is a successful method for improving the surface wear resistance of aluminum, so that this method has greatly increased ...

مصطفی‌ زاده, بهروز , کهنوجی, محمد ,

The emitter discharge is affected by parameters such as pressure, irrigation water temperature, manufacturer’s coefficient of variation, and emitter clogging. In order to study the effects of irrigation water temperature on emitter discharge and to determine the discharge-pressure variations and manufacturer’s coefficient of variations, an experimental trickle irrigation system was designed and...

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