Results 41 to 50 of about 30,293 (128)

مکان‌یابی نقشه‌های خطرپذیری سیلاب رودخانه دز با رویکرد پدافند غیرعامل (محدوده مطالعاتی: شهرستان دزفول) [PDF]

open access: yesپدافند غیرعامل, 2022
کاهش آسیب پذیری کاربری­های شهری جهت تقلیل میزان خسارات، از مهم­ترین اهدافی است که امروزه برنامه­ریزان و مدیران شهری درصدد اجرای آن می­باشند که این مهم با بهره­گیری از رویکردهای جدید مدیریت بحران از قبیل پدافند غیرعامل، قابل دستیابی می­باشد و می­تواند در ...
حامد پورصمصام   +3 more
doaj  

Effect of sediment load boundary conditions in predicting sediment Delta of Tarbela Reservoir in Pakistan

open access: yes, 2019
Setting precise sediment load boundary conditions plays a central role in robust modeling of sedimentation in reservoirs. In the presented study, we modeled sediment transport in Tarbela Reservoir using sediment rating curves (SRC) and wavelet artificial
Ahmad, I.   +7 more
core   +1 more source

بررسی نقش عامل‌های مؤثر در طغیان رود تلار مازندران در رخداد اسفند 1397 با استفاده از مدل HEC-RAS [PDF]

open access: yesپژوهش‌های آبخیزداری
مقدمه و هدف رخداد بارش ­های شدید که در مدت زمان کوتاه حجم زیادی از نزولات جوی را به‌همراه دارد، غالباً باعث بروز مشکلات پرشماری برای جوامع انسانی، گیاهی و جانوری می­ شود.
ولی الله کریمی   +1 more
doaj   +1 more source

Developing Guidelines for Two-Dimensional Model Review and Acceptance [PDF]

open access: yes, 2018
Two independent modelers ran two hydraulic models, SRH-2D and HEC-RAS 2D. The models were applied to the Lakina River (MP 44 McCarthy Road) and to Quartz Creek (MP 0.7 Quartz Creek Road), which approximately represent straight and bend flow conditions ...
Homan, Joel, Toniolo, Horacio
core  

برداشت شن و ماسه از رودخانه و مخاطرات مربوط به تغییرات سرعت و پروفیل طولی در زمان های سیلابی مطالعه موردی: حوضه آبریز رودخانه باراندوزچای استان آذربایجان غربی [PDF]

open access: yesهیدروژئومورفولوژی
مدیریت حوضه‌های آبریز بدون توجه به نقش بهره‌برداران محلی و دولتی، سیاست‌های حفظ منابع آب و خاک را با ناکامی مواجه می‌نماید و در درازمدت آثار و تبعات منفی زیادی بر جای خواهد گذاشت.
علی پرویش, هیراد عبقری
doaj   +1 more source

Flood risk assessment in an urban area: Vila Nova de Gaia [PDF]

open access: yes, 2013
This paper proposes a methodology for flood risk assessment in a non fluvial urban flood. Two hazard classifications were considered; one with water depth and flow velocity classes and other with the product of water depth and flow velocity.
Fernandez, P., Moreira, M., Mourato, S.
core  

Ice-Cover and Jamming Effects on Inline Structures and Upstream Water Levels

open access: yes, 2017
River ice cover is a reoccurring phenomenon in the Northern United States every year. Sheets and layers of ice result in a rise of water surface elevation and may lead to ice jams in a river.
Ahmad, Sajjad   +3 more
core   +1 more source

Sediment transport modelling around bridge at Sungai Tuiusing 1D quasi unsteady flow HEC-RAS [PDF]

open access: yes, 2015
Sungai Tui is located in the state of Pahang where huge amount of rainfall during monsoon season subjected to sediment transport process. The river responses by increased or decreased sediment carrying capacity, changing in channel cross section, erosion
Amaran, Krishnamuthi
core  

Flood magnitude-frequency and lithologic control on bedrock river incision in post-orogenic terrain [PDF]

open access: yes, 2006
Mixed bedrock-alluvial rivers - bedrock channels lined with a discontinuous alluvial cover - are key agents in the shaping of mountain belt topography by bedrock fluvial incision.
Annandale   +111 more
core   +1 more source

Assessing the Risk of 100-year Freshwater Floods in the Lamprey River Watershed of New Hampshire Resulting from Changes in Climate and Land Use [PDF]

open access: yes, 2013
What is the coastal resource issue the project sought to address? Both the magnitude and frequency of freshwater flooding is on the rise in seacoast NH and around much of New England.
Miller, Steve   +8 more
core   +6 more sources

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