:: Volume 17, Issue 58 (9-2017) ::
جغرافیایی 2017, 17(58): 285-301 Back to browse issues page
Analysis of affecting factors on creating Gully in the eastern shores of Urmia Lake
Sayyad Asghari saraskanroud *
urmia university
Abstract:   (5835 Views)
Gully erosion is one of the erosive processes that mostly contribute to shape the earth surface. The development of gullies causes the loss of a great amount of soil and can be considered as one of the principal causes of geo- environmental degradation in eastern shores of Urmia Lake. The aim of this study is to evaluate the factors influencing on dynamic of area Gullies in a time period one year. For this purpose, in this research was used amount of Electrical conductivity (EC), Sodium Adsorption Ratio (SAR), PH of soil type, morphometric for classification and analysis of affecting factors in creating Gully erosion and climatology index , humidity index in regional formations for analysis of creating potential of Gully. Analysis of texture selective samples indicated fine particles of geological formations because of the weak structure of Aggregates have provided Suitable conditions for Longitudinal and latitudinal development of Gully. So that morphometric monitoring results of area Gullies is indicator high dynamic and growth rate area Gullies. The high concentration of soluble salts In particular, high levels (EC and SAR) have caused dissolution erosion and Piping erosion. Results indicated that creating of Gully erosion in area is impressed from two factors: 1. Climatic factors that create runoff and change in permeability rate 2. Physical and chemical characteristics of area soil.
Keywords: Gully erosion, morphometric, Physical and chemical characteristics of soil, rate of PH, EC, SAR
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Type of Study: Research | Subject: Special
Received: 2015/06/14 | Accepted: 2015/11/29 | Published: 2017/09/21

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Volume 17, Issue 58 (9-2017) Back to browse issues page