ARTICLE INFO

Article Type

Original Research

Authors

Madadi   A. (*1)
Ghale   E. (1)
Ebadi   E. (1)
Nezafat Takaleh   B. (1)
Pasban   AH. (1)






(1) Department of Geomorphology, Faculty Social Sciences, Mohaghegh Ardabili University, Ardabil, Iran

Correspondence

Address: Faculty Social Sciences, Mohaghegh Ardabili University, Uni‐ versity Street, Ardabil, Iran. Postal Code: 5619913131.
Phone: +98 (45) 31505972
Fax: -
aghil48madadi@yahoo.com

Article History

Received:  July  18, 2020
Accepted:  September 15, 2020
ePublished:  March 18, 2021

BRIEF TEXT


The study of soil erosion as a geomorphological process resulting in the reduction of the fertility, destruction of soil, filling the dams' reservoirs, obstruction of the irrigation canals, muddying rivers' water and reduction of water quality has been of great importance from past.

Physiographic and topographic, lithological and soil, climatic and hydrological, geomorphological, and vegetation factors affect soil erosion and sedimentation [Kaviani et al., 2013]. Moazami & Feyznia (2008) modeled Jarahi river sedimentation using multivariable regression method. The results showed this method is proper and efficient for modelling. Motamedi & Azari (2018) in their study in some sub-basins in Khorasan Razavi concluded that the amount of sediment is dependent on form factor coefficient, annual precipitation in level of 5%. Shi et al. (2014) studied the impact of land-uses and physiographic parameters on sedimentation in China. They showed Agriculture land-use is the most influential factor in sedimentation. Ares et al. (2016) analyzed suspended sediment concentration controlling factors in Pampas region in Argentina. They used multivariable regression for modelling. They concluded that generalized linear model can explain 85% of the changes in sediments concentration.

This study aimed to find out the relationship between geomorphological characteristics and sedimentation in Nirchai basin.

There is no research type is mentioned.

The current research is carried out in all 27 sub-basins of Nirchai basin from 2006 to 2016.

There are no sampling method and number reported

The Shapiro-Wilk test and Kolmogorov-Smirnov test were used for the analysis in SPSS 22. ARC GIS software was also used in this study.

Sedimentation in sub-basins The annual sedimentation in all sub-basins are presented in Table 2. According to Table 2, the amount of annual sedimentation in all sub-basins vary from 0.1 tons per year to 11.26 tons per year. Geomorphological characteristics of the sub-basins Sub-basin 1 is the largest one with the area of 23.78〖km〗^2 and sub-basin 8 is the smallest one with 1 〖km〗^2. Sub-basins' slop varies from 5.03% to 36.52% (Table 2). For morphometric analysis of the basin and make comparisons between various sub-basins, some indices such as form factor coefficient, form factor, compactness coefficient, elongation ratio, roundness ratio, and Lemnisk ratio were used (Table 3). According to Table 4, basin branch ratio varies from 0.052 in sub-basin 27 to 0.395 in sub-basin 1. Drainage density means the expansion of drainage system or each basin's streams number in the area of the basin.

The results of the current research are consistent with the results of Mansouri et al., 2017; Ebrahimijam & Ahmadian, 2014; Mohseni Tabrizi et al., 2012; Ziyari et al., 2016; Podratchi, 1993 in terms of the impact of the indicators in the extension of the defenseless spaces and dysfunctionality.

Offering flexible round-the-clock functions such as night drugstores, clinics, markets, and so on. Construction of the stamping grounds for the residents using proper vegetation, flooring, colorful urban furniture in defenseless spaces. Allocation of the urban defenseless spaces to holding the festivals and outdoor markets. Allocation of the defenseless spaces to outdoor playgrounds and surrounding them by fences. Lightening such spaces and asking the owners to install nigh lamps at their doors.

There is no limitation reported.

The awareness of the reasons for defenselessness and insecurity in urban spaces and their impact on the residents' life quality plays an important role in helping the managers and the experts in the renovation of the urban fabrics such as the valuable fabric of Oudlajan. The results show Oudlajan is not secure according to the studied indicators. Lack of proper plans to improve such places leads to the increase in violence, unsafety, criminal activities and leaving population from that area.

We tend to thank Mr. Kazemi, Mr. Najafi, and Hosseini, the facilitation office (Mr. Dushen, Ms. Nourie, and Ms. Shamshiri).

None.

None.

This study is carried out at the first author's personal expense.

TABLES and CHARTS

Show attach file


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