نتایج جستجو برای: georas
تعداد نتایج: 87 فیلتر نتایج به سال:
Climatic variability, unplanned land use pattern and encroachment into the flood plain are affecting the hydrology of Bagmati river basin of Nepal. In this study, methodology to improve present flood management system with non-structural countermeasures has been elaborated. Study of hydrological condition, basin scale rainfall runoff modeling and inundation analysis is helpful to prepare commun...
Flood pron areas of rivers are generally hazardous. Regionalizing these hazardous areas in terms of the degree of hazard they produce is very important for regional flood management, insurance companies and land users. Therefore, this research has tried to regionalize the potential hazard of the flood prone areas of the Morghak River using HEC-GeoRAS model as an example for all flood plains...
در ایران همه ساله پهنه های وسیعی از اراضی مرغوب و حاصلخیز سواحل رودخانه و مسیل ها بر اثر عبور جریان های سیلابی فرسایش یافته و تخریب می شوند. بنابراین جهت ساماندهی و مدیریت رودخانه ها و کنترل فرسایش لازم است که ضمن شناخت و پیش بینی رفتار هیدرولیکی جریان، نواحی مستعد فرسایش کناری شناسایی گردیده و اقدامات لازم جهت کنترل آنها به عمل آید. به همین علت در تحقیق حاضر وضعیت فرسایش کناری رودخانه بابلرود ...
تحقیق حاضر با هدف پهنهبندی سیلاب و تعیین حد بستر و حریم رودخانۀ مارون با استفاده از نرمافزار HEC-RAS در محیط GIS پیریزی شد. با استفاده از نرمافزار GIS نقشههای کاربری اراضی، توپوگرافی، و مدل رقومی ارتفاع تهیه شد. در گام بعد، مشخصات شبکۀ رودخانهای و مشخصات هندسی رودخانه با استفاده از نرمافزار HEC- GeoRAS استخراج شد. در نهایت، با استفاده از مدل هیدرولوژیکی HEC-HMS اقدام به مدلسازی و تخمین ...
Abstract River flood has become a severe disruption toward the community, and it can trigger loss of life, damage infrastructure properties, suffer economic, social cultural, environmental degradation. Flood hazard analysis downstream Comal Watershed in Pemalang Regency, Central Java, was designed to generate map reduce effects disaster. The simulated for five, 10, 25, 50 years using HEC-RAS Ar...
Asthma development and pathogenesis are influenced by the interactions of airway epithelial cells and innate and adaptive immune cells in response to allergens. Oxidative stress is an important mediator of asthmatic phenotypes in these cell types. Nuclear erythroid 2-related factor 2 (Nrf2) is a redox-sensitive transcription factor that is the key regulator of the response to oxidative and envi...
An approach to generate river cross-sections from the Advanced Spaceborne Thermal Emission and Reflection Radiometer Global Digital Elevation Model (ASTER GDEM) is discussed. The low resolution and the inadequate vertical accuracy of such global data present difficulties in differentiating features of hydraulic importance, which necessitate pre-processing of the DEMs before they are used. A ver...
This paper shows the combined use of remotely sensed data and hydraulic geometry methods as an alternative to rainfall-runoff models. Hydraulic geometric data and boolean images of water sheets obtained from satellite images after storm events were integrated in a Geographical Information System. Channel cross-sections were extracted from a high resolution Digital Terrain Model (DTM) and superi...
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