نتایج جستجو برای: georas extension

تعداد نتایج: 149179  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان - دانشکده کشاورزی 1394

رودخانه ها مهم ترین منابع حیاتی طبیعت هستند. دشت های سیلابی و دلتای رودخانه ها از دیرباز از اهمیت ویژه ای برخوردار بوده و همواره شرایط مناسبی برای استقرار و سکونت بشر و توسعه فعالیت های اقتصادی فراهم نموده اند. اما این نواحی همواره توسط حوادث طبیعی مانند سیلاب ها مورد تهاجم قرار گرفته اند. امروزه، کاربرد روش های سیستمی به خاطر توانایی پردازش حجم بالایی از داده ها در مدت زمان کوتاه در برنامه ریز...

Journal: :Düzce Üniversitesi bilim ve teknoloji dergisi 2021

Dünyamızda küresel ısınmanın etkisi ile deniz seviyesinin yükselmesi, mevsimlerin değişmesi ve ekosistemin bozulması sonucu taşkınlar meydana gelebilmektedir. Taşkınları önlemek için iyi bir planlama projelendirme gerekmektedir. Bu çalışma pürüzlülük katsayısının açık kanal akımına araştırılmıştır. Çalışmada amaç, mevsimsel değişim bitki örtüsünün değişmesine bağlı olarak kanaldaki akımı incele...

تاجداری, خسرو, رضائی, پرویز, میرقاسمی, سید اسماعیل,

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...

ژورنال: :پژوهش های جغرافیایی (منتشر نمی‏شود) 2007
گلاله غفاری کریم سلیمانی ابوالفضل مساعدی

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 ...

ژورنال: اکو هیدرولوژی 2020

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 ...

Journal: :international journal of agricultural science, research and technology in extension and education systems 2013
hassan ibrahim zhou jing li min

this research was based on primary data collected through well designed and pre-tested questionnaire, to determine awareness of farmers on extension methods used by adp in kano state of nigeria. multistage sampling technique was used, in which three local governments were randomly selected. secondly, three wards one each from the selected local governments (danbatta, gaya and madobi) were rando...

Journal: :international journal of agricultural science, research and technology in extension and education systems 2013
muhammad israr nafees ahmad dawood jan tahir ali shah m. m. shafi

present study was conducted in the three provinces of pakistan with the objectives to study the curricula relevancy with the participatory extension, supervision and administration and its practical applicability at the field level. for this extension agents of the selected provinces were selected purposively. mail questionnaire were used as instruments for data collection form 227 respondents ...

Journal: :international journal of agricultural science, research and technology in extension and education systems 2013
ajieh patrick chuks

this study examined the accuracy between extension professionals and farmers regarding their perceptions of privatization and commercialization of agricultural extension services. the study was carried out in delta state, nigeria and it had a sample size of 224 respondents comprising of 134 extension professionals of the delta state agricultural programme (dtadp) and 90 farmers that were random...

Journal: :IOP conference series 2022

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...

Journal: :American journal of physiology. Lung cellular and molecular physiology 2015
Thomas E Sussan Sachin Gajghate Samit Chatterjee Pooja Mandke Sarah McCormick Kuladeep Sudini Sarvesh Kumar Patrick N Breysse Gregory B Diette Venkataramana K Sidhaye Shyam Biswal

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...

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