نتایج جستجو برای: flood maximum flow rate

تعداد نتایج: 1630931  

Journal: :جنگل و فرآورده های چوب 0
مریم مرادنژادی دانشجوی کارشناسی ‏ ارشد مهندسی جنگل، دانشکدة منابع طبیعی دانشگاه تهران، کرج، ایران مقداد جورغلامی دانشیار گروه جنگل داری و اقتصاد جنگل، دانشکدة منابع طبیعی دانشگاه تهران، کرج، ایران آرش ملکیان استادیار گروه احیای مناطق خشک و کوهستانی، دانشکدة منابع طبیعی دانشگاه تهران، کرج، ایران

forest cover is one of the most effective factors in reducing flooding in northern iran, so that in recent years the destruction, land use changing and uncontrolled harvesting of forest areas, has greatly increased the number and magnitude of floods. so far, there have been few studies on forest hydrology in iran, particularly the northern hyrcanian forests. this study examines the impact of a ...

Journal: : 2022

In this study, flood risk areas were determined with Hec-RAS hydraulic model for the Küçük Aksu River in Antalya, Turkey. Firstly, models developed according to different recurrence flow rates and, propagation maps and depth generated. As a result of that was by using 100-year rate, it seen 6.04 ha residential area 33.73 agricultural is submerged. The maximum water level as 11.60 m rate. Then, ...

Journal: :journal of rangeland science 0
nafiseh moghadasi gorgan university of agricultural sciences and natural resources iman karimiraf university of tehran vahedberdi sheikh gorgan university of agricultural sciences and natural resources

extensive flood damages all over the world necessitate its control and operation. hydrologic impacts of land use change appear in many ways such as total runoff, and flood peak flow. this study was performed in 2014 and aimed to investigate the impacts of land use changes on the occurrence of floods in the catchment of boostan dam in golestan province, iran. for this purpose, watershed modeling...

Varkesh-Chai River with approximately 69 kilometer and north-south trend, in one of the main and permanent rivers of Tabriz city, That 10 villages with worn out texture have established in its main bed. Field studies show that, villages’development has been without knowing the rules governing hydraulic behavior, prediction of river hydrological behavior, and no respecting the main bed of river,...

Journal: :The Journal of the Marine Acoustics Society of Japan 2003

2008
Hongming He Qian Yu Jie Zhou Yong Q. Tian Robert F. Chen

r Publis .030 : +1 413 mass.ed Summary Flood routing processes in the middle Yellow River basin are complex since they consist of three types of flood: bidirectional, convergent and divergent flood flows between the main channel and its tributaries. We propose three computation schemes to simulate the complex flood routing: a simple scheme for a single main channel with no tributary or backwate...

Journal: :journal of water sciences research 2013
m moazamnia h bonakdari

flow-rate measurement in rivers under different conditions is required for river management purposes including water resources planning, pollution prevention, and flood control. this study proposed a new discharge estimation method by using a mean velocity derived from a 2d velocity distribution formula based on tsallis entropy concept. this procedure is done based on several factors which refl...

Journal: :JCP 2011
Changjun Zhu Zhenchun Hao

In view of the abnormal phenomenon that a flood peak increased in August 2004 and July 2005 along the lower Yellow River, the experiments of this abnormal phenomenon is studied. It is found that the flood increase was due to the decrease the channel roughness in the propagation of high concentrated flood carrying the extra fine sediment which was discharged from xiaolangdi reservoir. Experiment...

H Bonakdari M Moazamnia

Flow-rate measurement in rivers under different conditions is required for river management purposes including water resources planning, pollution prevention, and flood control. This study proposed a new discharge estimation method by using a mean velocity derived from a 2D velocity distribution formula based on Tsallis entropy concept. This procedure is done based on several factors which refl...

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