نتایج جستجو برای: Slit check dam
تعداد نتایج: 74586 فیلتر نتایج به سال:
Eroded sediments from catchment areas transport by streams and deposit in downstream less steep areas. Despite reducing the useful life of various hydraulic structures including reservoir dams, flood walls, and bridges, this phenomenon changes the main river hydraulic conditions and increases the flood prone farms in the riverbank area. Check dams are among the structures that can prevent form ...
Check dams are one of the structures used to control debris flows. In this study, in order to evaluate the effect of hydraulic parameters on debris sediment trapping rate by the slit trapezoidal check dams with different angles, and to develop an empirical relation for determination of trapping coefficient of the dam reservoirs, three physical models of the check dams were used. The tests were ...
Woody debris flows (i.e., carrying wood) are common in mountainous and forested areas. They can cause more severe hazards due to the effects of LW (woody larger than 1 m length 10 cm width) compared without LW. Mitigation structures for have considered little regulating effect on influence regulation sediment. Thus, model tests were conducted discuss slit-check dams woody flow. Research results...
T he advantages of using a rubber dam are well-known when performing operative and endodontic procedures. These benefits include the following: disolation of the operating field to keep it dry and clean; dimproved access and visibility; dpotentially improved properties of dental materials; dprotection of the patient and dentist; dimproved operating efficiency. 1 Preparing teeth for indirect res...
In this research, fractal relationships were used to evaluate the particle size distribution of the check dam. Three check dams with height of 2, 2 and 2.6 meters were selected and the hole was drilled same the height of the check dam at the sediment deposits. Then, depending on the color of the deposited layers, the thickness of the layers was determined and sampling was down from each layer t...
One of the simple methods for erosion control, flood mitigation and flood damage reduction in the streams is building the checkdams. The present study was carried out to evaluate the performance of checkdams, location across the streams in the retention of the fine sediments in Droudzan watershed in Southern Iran. For this purpose, a number of streams with many stabilized check dams which were ...
One of the simple methods for erosion control, flood mitigation and flood damage reduction in the streams is building the checkdams. The present study was carried out to evaluate the performance of checkdams, location across the streams in the retention of the fine sediments in Droudzan watershed in Southern Iran. For this purpose, a number of streams with many stabilized check dams which were ...
abstract spacing between check dams depends on the stream bed slope, effective height of check dams and slope of deposited sediments behind the check dams. the slope of deposited sediments is more important than the other two factors because of complications in the way of its occurrence and its measurement after several years of dam construction. this research presents the effective factors aff...
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