Identifying the most suitable plant species form Nebkhas to stabilize sand movement by application of AHP model (case study: Samad-Abad, Sarakhs, Iran)

Yousefi, mohamadjavad; Rashki, Alireza; Farzam, Mohammad; ,

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Volume 19, Issue 66 (9-2019)

جغرافیایی 2019, 19(66): 253-267

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Identifying the most suitable plant species form Nebkhas to stabilize sand movement by application of AHP model (case study: Samad-Abad, Sarakhs, Iran)

Mohamadjavad Yousefi¹

, Alireza Rashki ^*

¹, Mohammad Farzam¹

1- Ferdowsi unuversity of mashhad

Abstract: (5692 Views)

Environmental crisis and the consequence loss of natural resources are the main reasons in which force the managers to think of the ways to manage risks and solve environmental tensions. One of the most problematic environmental issues in saad-abad region located at Sarakhs city, IRI, is the moving sands which attack residential centers, roads and the infrastructures. Therefore, environmental systems respond to the moving sands by nebkhas which balance the imposed pressure caused by wind erosion. Thus, nebkhas are considered as a significant factor to maintain the equilibrium among the forces created from environmental resistance powers and degrading moving sands imposed on residential systems. However, the most suitable plant species must be identified in order to manage the nebkhas to gain the aforementioned goals. The aim of this study is to identify the most suitable plant species in nebkhas in order to evaluate the amount of moving sands fixed in the study area using AHP model through morphometric characteristics.

Key words: Samadabad- Sarakhs - Nebkha- AHP- stabilized sand

Study area:

This study was conducted in Saad-Abad as a center of wind erosion located in south parts of Sarakhs region, Iran, near Turkmenistan boundary and Tajan River with 35’ 58” to 36’17” longitude and 61’3” to 61’12” latitude, 21523 ha of area, 750 meters of average height from sea level, 187.6 mm of mean annual precipitation, 14.4 mean annual temperature and NW to SE dominant wind direction. Stipagrostis, Alhaji and Peganum showed to be the most suitable species for nebkhas formation.

Materials and Methods:

Proceeding field investigations and satellite imagery analysis, the study area was determined. Using 6 transects (3 upwind and 3 leeward) each 100 meters long, we measured nebkhas morphometric characteristics (including height, length & volume) and plant characteristics (including height, perimeter & volume). Fourteen nebkhas were analyzed for each species (Stipagrostis, Alhaji and Peganum). AHP model was used in order to compare and determine the most suitable species for stabilizing moving sands.

Results:

The final weight was calculate as 0.1964, 0.4875 and 0.3161 for Stipagrosis, Peganum and Alhagi, respectively. Therefore, as it is clearly explained by AHP model, Peganum is introduced as the most suitable plant species for stabilizing moving particles in the region proceeding with Alhagi.

Conclusion:

Regarding nebkhas morphometric characteristics and plant morphological features as the input criteria for AHP model, the results introduced Peganum as the most suitable species for stabilizing moving sands proceeding with Alhagi and Stipagrosis.

Keywords: Sarakhs, Nebkha, Sand stabilization, AHP model

Full-Text [PDF 719 kb] (1019 Downloads)

Type of Study: Research | Subject: Special
Received: 2017/02/17 | Accepted: 2018/05/20 | Published: 2019/09/1

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Yousefi M, Rashki A, Farzam M. Identifying the most suitable plant species form Nebkhas to stabilize sand movement by application of AHP model (case study: Samad-Abad, Sarakhs, Iran). جغرافیایی 2019; 19 (66) :253-267
URL: http://geographical-space.iau-ahar.ac.ir/article-1-2822-en.html

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