Paper Information

Journal:   JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY)   JANUARY-FEBRUARY 2017 , Volume 30 , Number 6 #A0043; Page(s) 1978 To 1992.
 
Paper: 

DETERMINATION OF EFFECTIVE FACTORS ON THE OCCURRENCE OF DIGITATED GULLY EROSION IN THE AGHEMAM(2) WATERSHED

 
 
Author(s):  MOHAMMAD EBRAHIMI M., JAVADI M.R.*, VAFAKHAH M.
 
* DEPARTMENT OF NATURAL RESOURCES, NOUR BRANCH, ISLAMIC AZAD UNIVERSITY, NOUR, IRAN
 
Abstract: 

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 agricultural lands destruction in the lowland areas. Based on the Posen definition, gully is a river with high slope walls and an erosive high slope and active head which occurs by erosion resulted from the surface flow (usually during or after high density rainfalls). Different factors play role in occurrence and development of gullies and sediment production resulted of this kind of erosion which includes slope, amount and distribution of rainfall intensity, construction operations, vegetable cover destruction, land-use change, unsuitable utilization, and susceptibility of bed materials to the erosion and flood. Considering the importance of gully erosion and the way of its occurrence and development and its control, more comprehensive studies are needed to be done. Although, some studies have done in this subject that some of them are depicted below:
Rinkez et al showed that gully erosion is further occurred in soils with high exchangeable sodium percentage and sodium absorption ratio and they depicted that these two factors are important indices for soil diffusion amount in gullies. Buma and imson investigated factors such as electricity conductivity, calcium carbonate percentage, and the type of clay mineral in white, brown, and gray samples of marl in the Peter area, Spain. According to their results, factors such as electrical conductivity and sodium absorption ratio had high correlation with erosivity of the Bad Lands.

 
Keyword(s): LITHOLOGY, LANDUSE, GULLY EROSION, PHYSICAL AND CHEMICAL CHARACTERISTICS OF THE SOIL
 
References: 
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