توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱The effect of submerged vanes on hydraulic properties of open channel flow
نویسنده(ها):
اطلاعات انتشار: پنجمین کنفرانس هیدرولیک ایران، سال
تعداد صفحات: ۹
Submerged sill or vane is a small flow training structure, which has been widely used in some countries to prevent erosion from the outer bank of the rivers, sediment control diversion at water intakes and bridge crossing successfully. Although this technique has broad range of applications, but the potential of submerged vane technique as a control measure have not been fully explored. This paper summarizes the most significant effect of submerged vanes on hydraulic parameters such velocity, momentum, pressure, drag force, hydraulic gradient, energy gradient and flow regime of open channel flow. For this purpose, a series of laboratory tests were conducted for both with and without vanes conditions in the laboratory. The results showed that relative velocity, relative momentum and relative pressure profiles along the flume over vanes array were changing with the number of vanes. When the number of vanes increased from zero to five, the relative velocity and relative momentum increased and relative pressure reduced gradually over the vanes. The drag force inserted by vanes at lower water level was much greater than the higher water level. The hydraulic gradient reduced when the water depth ratio rose for a constant discharge. A small rise in vane height or drop in water depth would cause a high reduction in hydraulic gradient over the vanes array.<\div>

۲Simulation of biological measures to reduce runoff and erosin from nothern Karoon river watershed, Iran, using EUROSEM
نویسنده(ها): ، ،
اطلاعات انتشار: اولین همایش منطقه ای بهره برداری از منابع آب حوضه های کارون و زاینده رود (فرصتها و چالشها)، سال
تعداد صفحات: ۹
The objective of this study was to investigate the role of biological measures on runoff and erosion reduction using EUROSEM. The study area was a part of Vanak catchment in the Northern Karoon river watershed, Iran. Runoff and sediment data were collected from two experimental plots located in two catchments for a few periodical rainfall events. Parameterization, calibration and validation of model carried out on input parameters. The simulation of biological soil and water conservation technique indicated that the biological protection approach caused significant differentials in generated total runoff, total soil loss, peak flow rates and time to peak flow rates as compared to that of control. Biological conservation techniques reduced output sediment as well as total runoff to the amount of 60 to 80 percent by achievement of a sustainable ecosystem in the catchment,.<\div>
نمایش نتایج ۱ تا ۲ از میان ۲ نتیجه