نتایج جستجو برای: wind sediments

تعداد نتایج: 111368  

ژورنال: تحلیل فضایی مخاطرات محیطی 2020
Fotoohi, Samad, negaresh, Hossein, soraya, reza,

Seasonal lakes or playas are considered as a major source of wind sediments and dust storms due to locating in post-topographic areas in dry and desert areas with strong winds system and also the presence of fine-grained and separated particles. Sediments and wind deposits in Sistan have caused the lives of thousands of people in these areas and especially the students to be at risk. The volume...

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ژورنال: پژوهش های فرسایش محیطی 2018
Asghari-Kaljahi, Ebrahim, Hoseinpour, Sakineh, Nadiri, Ata Ollah,

Extended abstract 1- Introduction Urmia Lake as the largest domestic lake in Iran is drying. Climate change in the northwest of Iran, rainfall reduction and evaporation, due to the increase in average temperature in the Northwest of the country accompanied with the involvement of human factors such as dam construction, have caused an irreparable environmental hazard in the northwestern of Ira...

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ژورنال: مطالعات جغرافیای مناطق خشک 2022
abravesh, sadegh, ghohrodi-TALI, manijeh, mohamadkhan, shirin, sarvati, mohammad reza,

Abstract The destructive effects of wind erosion on the environment and human activities have led to the identification and quantification of sources of wind sediments as an important issue for planners. Due to the importance of the subject, in this study, the origin of wind sediments in Jalali sands has been investigated. To achieve this, after mapping the geomorphological facies of the study...

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2004
JENNIFER JOYCE PAUL W. JEWELL

Understanding the nature and extent of methane production and flux in aquatic sediments has important geochemical, geotechnical, and global climate change implications. Quantifying these processes is difficult, because much of the methane flux in shallow sediments occurs via ebullition (bubbling). Direct observation of bubble formation is not possible, and bubbling is episodic and dependent upo...

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2008
Ronald Greeley Patrick L. Whelley Lynn D. V. Neakrase Raymond E. Arvidson Nathan T. Bridges Nathalie A. Cabrol Philip R. Christensen Kaichang Di Daniel J. Foley Matthew P. Golombek Kenneth Herkenhoff Amy Knudson Ruslan O. Kuzmin Ron Li Timothy Michaels Steven W. Squyres Robert Sullivan Shane D. Thompson

[1] Abundant wind-related features occur along Spirit’s traverse into the Columbia Hills over the basaltic plains of Gusev Crater. Most of the windblown sands are probably derived from weathering of rocks within the crater, and possibly from deposits associated with Ma’adim Vallis. Windblown particles act as agents of abrasion, forming ventifacts, and are organized in places into various bed fo...

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Journal: :مرتع و آبخیزداری 0
محمد اکبریان مربی دانشگاه هرمزگان، ایران سیّد حسن کابلی دانش آموخته دکتری مرتعداری، دانشکده منابع طبیعی، دانشگاه تهران، ایران. نوازاله مرادی مربی دانشگاه هرمزگان، ایران.

determining the relative sensitivity of land to erosion and its factors, could be the basis of soil conservation programs. the aim of this study is to compare water and wind erosion functions in land degradation of dasht-e-jeihoon using psiac and irifr.ea models and the source studying of aeolian sediments in geomorphologic facieses as homogeneous units. the results indicate that in dasht-e-jei...

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Journal: :international journal of advanced biological and biomedical research 2014
alireza shahryary

in order to determine the source and critical areas of wind erosion, sistan plain, irifr-e.a method was applied. according to geomorphological investigations, the studied area consists of the following two main units namely: pediment with 1 type and 8 geomorphological facies, and playa with 2 types of flatland and desert type that includes 9 geomorphological facies. on the basis of sediment, th...

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2017
Anthony Reisinger James C. Gibeaut Phillippe E. Tissot

Suspended sediment dynamics of Corpus Christi Bay, Texas, USA, a shallow-water wind-driven estuary, were investigated by combining field and satellite measurements of total suspended solids (TSS). An algorithm was developed to transform 500-mModerate Resolution Imaging Spectroradiometer (MODIS) Aqua satellite reflectance data into estimated TSS values. The algorithm was developed using a reflec...

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ژورنال: پژوهش های فرسایش محیطی 2017
Baharvand, Mehdi, Khanbabai, Zahra, Maghsoudi, 1Mehran, Mahboobi, Sedigheh, Mohammadi, Abotaleb,

Extended abstract 1- Introduction     Granulometric analysis is a common tool used to understand and determine the origin of wind sands, and is applied in desertification studies; to realize such knowledge, the parameters of sand particles size as well as statistical analysis such as mean, standard deviation, kurtosis, skewness, etc. are used. One of the most common types of sand dunes formed...

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ژورنال: مهندسی اکوسیستم بیابان 2021
Miri, Abbas, Rezaei Torshizi, Mohsen ,

Introduction: Wind erosion results from desertification in arid and semi-arid regions and is intensified by any decrease in rainfall and vegetation. Sistan region, located in southeastern Iran, has been exposed to severe wind erosion and dust storms for about 23 years as a result of frequent and prolonged drought in the region and desiccation of Hamoun lakes. Therefore, finding appropriate meth...

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