الگوی فضایی میزان تاب‌آوری کالبدی سکونتگاه‌های روستایی شهرستان املش در برابر زمین‌لغزش

نوع مقاله : مقاله برگرفته از پایان نامه

نویسندگان

1 دانشجوی دکتری، گروه جغرافیا، دانشکده علوم انسانی، واحد رشت، دانشگاه آزاد اسلامی، رشت، ایران.

2 استادیار، گروه جغرافیا، دانشکده علوم انسانی، واحد رشت، دانشگاه آزاد اسلامی، رشت، ایران.

3 استاد، گروه جغرافیا، دانشکده علوم انسانی، واحد رشت، دانشگاه آزاد اسلامی، رشت، ایران.

چکیده

در این پژوهش میزان تاب‌آوری کالبدی سکونتگاه‌های روستایی شهرستان املش در برابر زمین‌لغزش به سه روش تحلیل سلسله‌مراتبی، جمع وزنی و شاخص هم‌پوشانی بررسی شد و سپس با استفاده از شاخص‌های آمار مکانی، الگوی فضایی میزان تاب‌آوری روستاها تعیین گردید. بدین منظور از 10 معیار شیب، فاصله از گسل، کیفیت ابنیه، مواد و مصالح، عمر ساختمان، لرزه‌خیزی، زمین‌شناسی، جهت شیب، عرض معابر و ارتفاع به ترتیب اهمیت استفاده شد. همچنین از دو روش آماره I موران محلی و تحلیل نقاط داغ (G* گتیس-اورد) برای شناسایی الگوها استفاده شد. نتایج نشان داد که میزان تاب‌آوری کالبدی سکونتگاه‌های روستایی در مقابل زمین‌لغزش بین تاب‌آوری خیلی کم تا خیلی زیاد متغیر بوده و روستاهای با تاب‌آوری خیلی بالا در محدوده شمال شرقی و روستاهای با تاب‌آوری خیلی پایین در محدوده شمال غربی و در بخش جلگه‌ای و کوهپایه‌ای شهرستان املش قرار دارند. در ناحیه کوهستانی شهرستان نیز روستاهای با تاب‌آوری کم و متوسط در هر سه مدل موردبررسی قابل‌مشاهده بودند. در این راستا نتایج آماره I موران محلی بیانگر وجود خوشه بالا - بالا (HH) و پایین - پایین (LL) در شمال شرقی و شمال غربی ناحیه موردمطالعه است که این الگوها در روستاهای ناحیه جلگه‌ای و کوهپایه‌ای نیز پدیدار شده‌اند. همچنین وجود نقاط داغ گرم و سرد در شمال شرق و شمال غرب شهرستان به اثبات رسیده و با 3 انحراف معیار مثبت و منفی در سطح اطمینان 99 درصد در ناحیه جلگه‌ای و کوهپایه‌ای نمایان شده‌اند. اکثر روستاهای شهرستان دارای تاب‌آوری متوسط نسبت به پدیده زمین‌لغزش بوده و رفتار تصادفی آن‌ها توسط دو آماره I موران محلی و تحلیل نقاط داغ مورد تأیید قرار گرفت. درمجموع نقاط روستاهای با تاب‌آوری بالا و پایین با الگوی خوشه‌ای بالا - بالا و پایین - پایین I موران محلی و نقاط داغ و سرد G* گتیس-اورد در هر سه مدل تحلیل سلسله‌مراتبی، جمع وزنی و شاخص هم‌پوشانی منطبق بودند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Spatial Pattern of Physical Resilience of Rural Settlements in Amlash County Against Landslides

نویسندگان [English]

  • Khalil Mehrzad 1
  • Eisa Pourramzan 2
  • Nasrollah MolaeiHashjin 3
1 PhD Candidate, Department of Geography, Faculty of Humanities, Rasht Branch, Islamic Azad University, Rasht, Iran.
2 Assistant Professor, Department of Geography, Faculty of Humanities, Rasht Branch, Islamic Azad University, Rasht, Iran.
3 Professor, Department of Geography, Faculty of Humanities, Rasht Branch, Islamic Azad University, Rasht, Iran.
چکیده [English]

In this research, the physical resilience of the rural settlements of Amlash County against landslides was investigated using hierarchical analysis, weighted summation, and overlap index. Then, the spatial pattern of the resilience of the villages was determined using spatial statistics indicators. For this purpose, ten criteria of slope, distance from fault, building quality, materials and materials, building life, seismicity, geology, the direction of slope, width of passages, and height were used in order of importance. Also, two methods of local Moran's I statistic and hot spot analysis (G* Gettys-Ord) were used to identify patterns. The results showed that the physical resilience of rural settlements against landslides varies from very low to very high. Villages with very high resilience are in the northeastern region, and towns with very low resilience are in the northwestern region and the plains. They are located in the foothills of Amlash County. In the mountainous area of the County, villages with low and medium resilience were also visible in all three investigated models. In this regard, the results of the local population statistics show the presence of high-high (HH) and low-low (LL) clusters in the northeast and northwest of the studied area, and these patterns have also appeared in the villages of the plains and foothills. Also, the existence of hot and cold hot spots in the northeast and northwest of the County has been proven, and with three positive and negative standard deviations at the 99% confidence level, they have been shown in the plains and foothills. Most of the counties' villages have moderate resilience to landslides, and their random behavior was confirmed by local Moran's I statistics and hot spot analysis. In total, the points of villages with high and low resilience with high-high and low-low cluster patterns of local Moran's I and hot and cold spots of G* Gettys-Ord in all three models of hierarchical analysis, weighted summation, and matching overlap index were. 

کلیدواژه‌ها [English]

  • Physical resilience
  • Criteria
  • Hierarchical analysis model
  • Spatial pattern
  • Amlash County

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پژوهش های روستائی
دوره 15، شماره 1
خرداد 1403
صفحه 32-53

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  • تاریخ دریافت: 28 مرداد 1402
  • تاریخ بازنگری: 22 آبان 1402
  • تاریخ پذیرش: 23 آبان 1402

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