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تحلیل توسعه فیزیکی شهر زاهدان در برابر سیلاب شهری (مورد مطالعه: دی1398 با روش سازمان حفاظت خاک آمریکا (SCS)) | ||
| برنامه ریزی توسعه کالبدی | ||
| مقاله 6، دوره 12، شماره 3 - شماره پیاپی 39، آذر 1404، صفحه 101-122 اصل مقاله (2.7 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.30473/psp.2026.75770.2784 | ||
| نویسندگان | ||
| صمد فتوحی* 1؛ مسعود سعیدی2؛ لیلی لطیفی2 | ||
| 1دانشیار گروه جغرافیای طبیعی، دانشکده جغرافیا و برنامه ریزی محیطی، دانشگاه سیستان و بلوچستان، زاهدان، ایران | ||
| 2دانشجوی دکتری ژئومورفولوژی، دانشکده جغرافیا و برنامه ریزی محیطی، دانشگاه سیستان و بلوچستان، زاهدان، ایران | ||
| چکیده | ||
| هر ساله مخاطرات طبیعی از جمله سیل، خسارات مالی و جانی زیادی به همراه دارد. از این رو شناسایی مناطق مستعد به سیل در شهرها از اهمیت زیادی برخوردار است. توسعه شهری زاهدان در چند دهه گذشته تأثیر قابل توجهی بر افزایش رواناب سطحی و خطر وقوع سیلابهای شهری داشته است. بررسی چهار مرحله توسعه شهری با استفاده از مدل SCS-CN بیانگر کاهش ظرفیت نگهداشت آب از 81/35 میلیمتر به 08/5 میلیمتر و افزایش درصد رواناب از 21/24درصد به 22/83درصد است. همچنین دبی پیک هیدروگراف سیل از 44/25 مترمکعب بر ثانیه در مرحله اول توسعه، به 85/99 مترمکعب بر ثانیه در مرحله چهارم توسعه شهری رسیده که نشاندهنده افزایش شدت جریان آب در زمان وقوع سیلاب است. عوامل اصلی مؤثر در این روند شامل بارشهای شدید و کوتاهمدت، توسعه بیبرنامه شهری، کاهش نفوذپذیری خاک، و تجاوز به حریم مسیلها هستند. با توجه به یافتهها، اجرای سیاستهای مدیریت شهری پایدار، توسعه سیستمهای زهکشی کارآمد، و استفاده از مصالح نفوذپذیر برای کاهش خطرات سیلابهای شهری ضروری بهنظر میرسد. | ||
| کلیدواژهها | ||
| سیلاب شهری زاهدان؛ مدل SCS-CN؛ رواناب سطحی؛ توسعه شهری؛ GIS | ||
| عنوان مقاله [English] | ||
| Investigating the physical development of Zahedan city against urban flooding in January 2019 using the US Soil Conservation Service (SCS) method | ||
| نویسندگان [English] | ||
| Samad Fotoohi1؛ Masoud Saeedi2؛ Leila Latifi2 | ||
| 1Associate Professor, Department of Physical Geography, Faculty of Geography and Environmental Planning, University of Sistan and Baluchestan, Zahedan | ||
| 2Ph.D. Student in Geomorphology, Faculty of Geography and Environmental Planning, University of Sistan and Baluchestan, Zahedan, Iran | ||
| چکیده [English] | ||
| Natural hazards, including floods, cause significant financial and human losses every year. Therefore, identifying flood-prone areas in cities is of great importance. The urban development of Zahedan in recent decades has had a considerable impact on increasing surface runoff and the risk of urban flooding. The analysis of four stages of urban development using the SCS-CN model indicates a reduction in water retention capacity from 35.81 mm to 5.08 mm and an increase in runoff percentage from 24.21% to 83.22%. Additionally, the flood peak discharge in the hydrograph has risen from 25.44 cubic meters per second in the first development stage to 99.85 cubic meters per second in the fourth stage, demonstrating the increased intensity of water flow during flood events. The main factors contributing to this trend include intense short-term precipitation, unplanned urban development, reduced soil permeability, and encroachment on floodplain areas. Given these findings, implementing sustainable urban management policies, developing efficient drainage systems, and utilizing permeable materials are essential measures to mitigate urban flood risks. | ||
| کلیدواژهها [English] | ||
| GIS, SCS-CN model, Surface Runoff, Urban Development, Urban Flood Zahedan | ||
| مراجع | ||
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