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ارزیابی خطر زمینلغزش با استفاده از مدلهای ال.ان.آر.اف و دبلیو.آی.ان.اف در حوزهی آبخیز خارستان، استان فارس | ||
| پژوهش های آبخیزداری | ||
| مقاله 3، دوره 31، شماره 1 - شماره پیاپی 118، فروردین 1397، صفحه 23-36 اصل مقاله (974.38 K) | ||
| نوع مقاله: پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/wmej.2018.116960.1066 | ||
| نویسندگان | ||
| معصومه زارع* 1؛ محمد شعبانی2؛ سید مسعود سلیمان پور3؛ امین رستمی راوری2 | ||
| 1کارشناسارشد منابع طبیعی- آبخیزداری ادارهی کل منابع طبیعی و آبخیزداری استان فارس | ||
| 2استادیار دانشگاه آزاد اسلامی واحد مرودشت | ||
| 3استادیار پژوهشی بخش تحقیقات حفاظت خاک و آبخیزداری، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان فارس، سازمان تحقیقات، آموزش و ترویج کشاورزی، شیراز، ایران | ||
| چکیده | ||
| زمین لغزش یکی از مهمترین عوامل فرسایش خاک و از جمله بلایای طبیعی است که هرساله زیانهای مالی و جانی فراوانی را بههمراه دارد. از این رو شناسایی این پدیده، عوامل مؤثر در وقوع زمین لغزش، و تعیین مناطق حساس برای کاهش زیانهای ناشی از آن ضروری است. هدف از این مطالعه ارزیابی خطر زمین لغزش در حوزهی آبخیز خارستان اقلید فارس است. ابتدا نقشهی هر یک عوامل مؤثر بر وقوع زمین لغزش شامل شیب، جهت، ارتفاع، بارش، فاصله از گسل، فاصله از جاده، فاصله از آبراه، زمینشناسی و نقشهی پراکنش زمین لغزش منطقه تهیه شد. برای تعیین نرخ هر یک از عوامل مؤثر در وقوع لغزش، لایه های اصلی و نقشهی پراکنش زمین لغزش ادغام، و سپس با استفاده از مدلهای ال.ان.آر.اف و دبلیو.آی.ان.اف محاسبه شد. سپس، با همپوشانی لایه های مختلف، نقشهی پهنه بندی خطر زمین لغزش تهیه شد. درنهایت، برای انتخاب مدل برتر، از سه شاخص، شاخص زمین لغزش، نسبت تراکم و مجموع کیفیت استفاده شد. نتایج نشان داد که 17/59 و 79/63 % از حوزه به ترتیب در پهنهی خطر زیاد و خیلی زیاد قرار دارند. مقدار مجموع کیفیت در مدل ال.ان.آر.اف 4/52 % است، که براساس آن میتوان نتیجهگیری کرد که عملکرد مدل ال.ان.آر.اف برای پهنه بندی خطر زمین لغزش در حوزهی آبخیز خارستان اقلید بهتر است. | ||
| کلیدواژهها | ||
| استان فارس؛ ال.ان.آر.اف؛ حوزهی آبخیز خارستان؛ دبلیو.آی.ان.اف؛ زمینلغزش | ||
| عنوان مقاله [English] | ||
| Landslide Risk Assessment Using LNRF and WPINF Models in Kharestan Watershed, Fars Province | ||
| نویسندگان [English] | ||
| Masoomeh Zare1؛ Mohammad Shabani2؛ Seyed Masoud Soleimanpour3؛ Amin Rostami Ravari2 | ||
| 1Watershed Management Expert, Fars, Natural Resources and Watershed Management Head of Office | ||
| 2Assistant Professor, Islamic Azad University, Marvdasht, Iran | ||
| 3Assistant Professor, Soil Conservation and Watershed Management Research Department, Fars Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Shiraz, Iran | ||
| چکیده [English] | ||
| Landslide is one of the most important factors of soil erosion, and is a natural disaster that makes numerous financial and life damages each year. Therefore, identifying this phenomenon, effective agents in landslide occurrence, and determination of susceptible areas is necessary for reducing damages of this phenomenon. The aim of this study is to evaluate landslide hazards in the Kharestan Watershed, Fars Province. Firstly, maps of the main factors affecting landslide occurrence including slope, direction, height, rainfall, distance from fault, distance from the road, distance from the waterway, land use, lithology and landslide were prepared. Each basic layer and landslide map was integrated to compute the rate of each parameter using LNRF and WINF models. Then, with overlapping different data layers, landslide hazard zonation maps were prepared. Finally, three indices including Landslide index (Li), Density ratio (Dr), and Quality summation (Qs) were used in order to choose the premier model. Results showed that in the LNRF model 17.59 and 79.63% of watershed were located in high and very high zone of risk map respectively. The quantity of Qs in the LNRF model is 4.52%. Based on these results it can be concluded that LNRF model shows a better performance for landslide hazard zonation. | ||
| کلیدواژهها [English] | ||
| Fars province, Kharestan watershed, Landslide, LNRF, WINF | ||
| مراجع | ||
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