Assessment of Urbanization effects on geomorphic characteristics of streams, Case study: Nour city, Mazandaran Province

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ESMAILI R.; LORESTANI G.

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Journal: Researches in Earth Sciences Year:2016 | Volume:6 | Issue:24 Page(s): 78-93

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Title

Assessment of Urbanization effects on geomorphic characteristics of streams, Case study: Nour city, Mazandaran Province

Author(s)

ESMAILI R. | LORESTANI G. | Issue Writer Certificate

Keywords

Urban streamsQ2

Stream classificationQ2

Nour cityQ2

MazandaranQ2

Abstract

Urbanization modifies fluvial systems more than other human activities. Impervious surfaces increase runoff and sediment supply. Therefore, urban stream adjust channel morphology as a consequence of urbanization. In this research, effects of urbanization on stream channels, in Nour city of Mazandaran province are studied. Aerial photographs and satellite images were used to document land cover, extent of urban areas and drainage network. Then, each stream was divided into reaches. Field surveys were achieved in 12 reaches, including measurements of channel dimension, sediment characteristics, geomorphic units, riparian vegetation and engineering structures. The streams have incised channels, very low gradients (<0. 003), width-to-depth ratios <10 and cohesive channel banks. Channel reaches in the Nour city were categorized into five channel types, including adjusting-but could recover, adjusting-unable to recover naturally, channelized-channel altered, Channelized-engineered and Channelized-culverted. Then, stream channel hazards were identified for each type of channel. Urban channel modification was described as a qualitative model. This method provides a potential framework for urban stream management by identifying hazards relating to individual reaches and consideration to suggesting possible management options.

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APA: Copy

ESMAILI, R., & LORESTANI, G.. (2016). Assessment of Urbanization effects on geomorphic characteristics of streams, Case study: Nour city, Mazandaran Province. RESEARCHES IN EARTH SCIENCES, 6(24 ), 78-93. SID. https://sid.ir/paper/207356/en

Vancouver: Copy

ESMAILI R., LORESTANI G.. Assessment of Urbanization effects on geomorphic characteristics of streams, Case study: Nour city, Mazandaran Province. RESEARCHES IN EARTH SCIENCES[Internet]. 2016;6(24 ):78-93. Available from: https://sid.ir/paper/207356/en

IEEE: Copy

R. ESMAILI, and G. LORESTANI, “Assessment of Urbanization effects on geomorphic characteristics of streams, Case study: Nour city, Mazandaran Province,” RESEARCHES IN EARTH SCIENCES, vol. 6, no. 24 , pp. 78–93, 2016, [Online]. Available: https://sid.ir/paper/207356/en

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