نتایج جستجو برای: gully erosion mapping using overlay index

تعداد نتایج: 3802357  

ژورنال: :پژوهش های دانش زمین 0
امیر صفاری دانشیار ژئومورفولوژی، دانشگاه خوارزمی مهدی احمدی دانشجوی دکتری ژئومورفولوژی و مدیریت محیط، دانشگاه خوارزمی سعید رحیمی هرآبادی دانشجوی دکتری ژئومورفولوژی و مدیریت محیط، دانشگاه خوارزمی

شناسایی عوامل موثر در گسترش فرسایش خندقی و پهنه بندی آن یکی از ابزارهای اساسی و مهم جهت مدیریت و کنترل این پدیده و انتخاب مناسب ترین گزینه در مقابله با گسترش این پدیده می باشد. از این رو هدف از این پژوهش انتخاب مهمترین معیارهای تاثیرگذار در پهنه بندی خطر فرسایش خندقی با استفاده از دو روشahp و anp، مشخص کردن نوع کاربری هایی که در محدوده مناطق با حساسیت بسیار زیاد و زیاد قرار دارند و در نهایت مقا...

2013
Henrique G. Momm Ronald L. Bingner Robert R. Wells Seth M. Dabney Lyle D. Frees

Gully erosion can account for significant volumes of sediment exiting agricultural landscapes, but is difficult to monitor and quantify its evolution with traditional surveying technology. Scientific investigations of gullies depend on accurate and detailed topographic information to understand and evaluate the complex interactions between field topography and gully evolution. Detailed terrain ...

2016
Q. H. Hu

This paper estimates the soil erosion rate and erosion-induced carbon sink using a new approach, and distinguish the contribution from topsoil erosion, gully erosion and landslides. The role of conservation programs on reducing soil erosion is also assessed. Special comments: 1. The abstract is too long and needed to be simplified. Besides, as the soil erosion rate estimated in this paper is mu...

Journal: :آب و خاک 0
حسین شهاب آرخازلو حجت امامی غلامحسین حق نیا اباذر اسمعلی

introduction: gully erosion is an important type of soil erosion in iran and ardebil province (moghimi and salami, 2011; khatibi, 2006). increasing the cross section of gullies is an indicator for gully developing (deng et al, 2015). topography and soil properties are two important factors in gully developing in various regions of worldwide (poesena et al, 2003). despite the importance of soil ...

Journal: :Earth Surface Processes and Landforms 2023

Gully erosion has been identified as a severe land degradation process with environmental and socio-economic consequences. Identifying areas susceptible to gully will aid in developing strategies inhibit future degradation. Various approaches have implemented predict map susceptibility but are mostly restricted small geographical extents because of limitations. Here, we introduce novel method t...

Extended abstract 1- Introduction Soil erosion is the most important cause of land degradation and the cause of water loss, soil loss, sedimentation in water resources, and maximum flood intensification (Liu et al., 2019). Models are the most important tools for estimating and mapping of erosion at the watershed level. As the experimental models are dependent on used coefficients and region c...

Journal: :آب و خاک 0
سلیمان پور سلیمان پور صوفی صوفی احمدی احمدی

abstract gully erosion is a kind of water erosion that has high priority in fars province due to sediment production and enormous damages to land, roads and infrastructures. in this study, 15 gullies were selected and their morphometric characteristics, such as catchment area, soil, cover vegetation and climate were measured. in order to determine influential factors on the sediment production ...

2002
Yang Qinke Li Rui

Astract: This paper shows how recent situation of soil erosion evaluation and prediction on a regional scale based on the techniques of spatial information. The study, which was carried out in central China, identified sediment discharge, precipitation, soil composition, gully density and land use as erosion factors at the regional level. It showed that soil erosion can be assessed and predicte...

Journal: :آب و خاک 0
مریم محمدابراهیمی محمدرضا جوادی مهدی وفاخواه

introduction: soil erosion by water is one of the most important processes of land degradation, especially in semi-arid areas. among different types of the soil erosion, gully erosion accounts as one of the most critical processes which can cause soil destruction, changes in landscape and water resources filling of reservoir of dams,decrease in water transport capacity of rivers and agricultura...

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