ارزیابی و پایش تخریب کاربری اراضی پیرامون رود دره های شهری با رویکرد اکولوژی سیمای سرزمین (مطالعه موردی: روده دره قشلاق)

محورهای موضوعی : محیط زیست شهری

مرتضی قبادی ¹ , علیرضا سپه وند ² , معصومه احمدی پری ³

1 - استادیار، گروه محیط زیست و شیلات، دانشکده کشاورزی و منابع طبیعی، دانشگاه لرستان. * (مسوول مکاتبات)
2 - استادیار، گروه آبخیزداری، دانشکده کشاورزی و منابع طبیعی، دانشگاه لرستان.
3 - دکتری، گروه محیط زیست، دانشکده محیط زیست، دانشگاه تهران.

تاریخ دریافت : 1397/10/22 تاریخ پذیرش : 1398/08/24 تاریخ انتشار : 1400/11/01

کلید واژه: رود دره قشلاق, برگشت پذیری, اکولوژی سیمای سرزمین, Fragstat,

چکیده مقاله :

زمینه و هدف: ارزیابی و تعیین آستانه برگشت پذیری بر اساس خصوصیات ترکیب و توزیع سرزمین، به برنامه ریزی و مدیریت بهینه سرزمین کمک می کند. از این رو این مطالعه با هدف ارائه یک نمونه از کاربرد روش کمی برآورد آستانه برگشت پذیری با رویکرد اکولوژی سیمای سرزمین برای اراضی پیرامون رود دره قشلاق به انجام رسیده است.روش بررسی: ارزیابی و پایش بر اساس خصوصیات ترکیب و توزیع ساختار سرزمین و برای پنج معیار برگشت پذیری شامل قابلیت برگشت پذیری، سرعت برگشت پذیری، حداکثر برگشت پذیری، میزان برگشت پذیری و امکان برگشت پذیری انجام شده است. روش مشاهده و ثبت خصوصیات کمی سیمای سرزمین به کمک پنجره متحرک در محیط نرم افزاری Fragstat در طی دو بازه زمانی 2000 و 2018 می باشد.نتایج: نتایج این مطالعه نشان می دهد که مقدار آسیب پذیری پهنه های پیرامون رود دره قشلاق به ترتیب عبارت است از پهنه A، D، C و B با 33% ، 25%، 23 % و 20%. همچنین نتایج برگشت پذیری پهنه ها نیز نشان داد که پهنه های A و D در برابر تغییرات و نیرو های وارده قابلیت برگشت پذیری ندارند و میزان برگشت پذیری پهنه B از همه پهنه ها بیشتر است.بحث و نتیجه گیری: بررسی خصوصیات ترکیب و توزیع ساختار سرزمین، شناخت مناسبی از میزان آسیب پذیری کاربری اراضی ایجاد می کند و کاربرد روش کمی برآورد آستانه برگشت پذیری با رویکرد اکولوژی سیمای سرزمین برای ارزیابی و پایش سرزمین مناسب است.

چکیده انگلیسی:

Background and Objective: Assessment of the resilience threshold based on the characteristics of landscape causes an appropriate management for vulnerability and identifying resilience areas. This study assessed the resilience threshold with the landscape ecology approach by using quantitative methods in the Gheshlagh river valley.Material and Methodology: The study area was classified into five homogeneous zones based on the characteristics of the composition and distribution of the landscape structure, and the vulnerability and resilience of the zones were determined. The vulnerability was calculated based on the status of the signs and their changes, and the resilience of the zones was determined based on 5 resilience criteria including ability of resilience, speed of resilience, maximum resilience, amount of resilience, and possibility of resilience. The method of recording the quantitative characteristics of the landscape was completed using moving windows in the fragstat environment during the two periods of 2000 and 2018.Findings: The results of the vulnerability assessment of the zones showed that the vulnerability of the zones were 33%, 25%, 23% and 20% for A, D, C and B, respectively. The results of the resilience of zones showed that the zones A and D are not resilience against the changes, and also the amount of resilience B is more than all zones, the speed of resilience C is also more than the other zones.Discussion and Conclusion: The characteristics of the composition and distribution of the landscape structure have significant effects on the environment and the resilience threshold with the landscape ecology approach is a suitable tool for assessing and monitoring of urban land use.

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