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بررسی تأثیر خشکسالی بر میزان تولید رسوب برآوردی به روش منحنی‌سنجه رسوب (مطالعه موردی: ایستگاه هیدرومتری چمریز، رودخانه کر، حوضه آبخیز سد درودزن) | ||
| اکوهیدرولوژی | ||
| مقاله 2، دوره 11، شماره 1، فروردین 1403، صفحه 15-25 اصل مقاله (996.35 K) | ||
| نوع مقاله: پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ije.2024.373390.1798 | ||
| نویسندگان | ||
| عباس راهدان1؛ صمد محسنی هفت چشمه* 2؛ حسین یوسفی سهزابی3 | ||
| 1گروه احیای مناظق خشک و کوهستانی-دانشکده منابع طبیعی | ||
| 2گروه احیای مناطق خشک و کوهستانی، دانشکده منابع طبیعی، دانشگاه تهران | ||
| 3دانشکده علوم و فناوری های نوین، دانشگاه تهران، تهران، ایران | ||
| چکیده | ||
| یکی از اثراتی که خشکسالی بر حوضه آبخیز می‌گذارد، تأثیر بر میزان تولید رسوب است. هدف از مطالعه حاضر بررسی تأثیر خشکسالی بر میزان تولید رسوب برآوردی به روش منحنی‌سنجه رسوب واقع در ایستگاه هیدرومتری چمریز صورت گرفت. در این مطالعه با استفاده از داده‌های طولانی مدت ایستگاه هیدرومتری چمریز واقع در بالادست سد درودزن، میزان تغییرات دبی رسوب تولیدی در هر سال به روش‌های مختلف منحنی‌سنجه رسوب محاسبه گردید. سپس با ارزیابی روش‌های به کار گرفته شده، بهترین روش جهت انجام آنالیزهای بعدی انتخاب شد (روش غیرپارامتری (CF2)). سپس با استفاده از داده‌های هواشناسی ایستگاه مورد نظر، دو شاخص خشکسالی SPI و RDI محاسبه و در نهایت با میانگین دبی رسوب تولیدی در هر سال مقایسه و آنالیز شدند. نتایج نشان داد که با افزایش مقدار شاخص خشکسالی SPI و RDI (به سمت ترسالی)، میزان دبی رسوب افزایش یافته که نشان‌دهنده تاثیر مثبت شرایط آب و هوایی بر تولید رسوب یک حوضه می‌باشد. در نهایت با بررسی وضعیت تولید رسوب در سال‌های متمادی با وضعیت خشکسالی و ترسالی، می‌توان نتیجه گرفت که در سالی که خشکسالی اتفاق افتاده، به‌دلیل تاثیر خشکسالی بر وضعیت پوشش گیاهی، رطوبت خاک و عوامل دیگر، در سال‌های پس از وقوع خشکسالی، نسبت به سال‌هایی که خشکسالی در طبقه نرمال بوده و پس از آن ترسالی اتفاق افتاده است، میزان دبی رسوب افزایش قابل توجهی داشته است. | ||
| کلیدواژه‌ها | ||
| خشکسالی؛ تولید رسوب؛ شاخص خشکسالی؛ منحنی‌سنجه رسوب؛ ارزیابی مدل | ||
| عنوان مقاله [English] | ||
| The effect of drought on the amount of sediment estimated by sediment rating curve (Case Study: Chamriz hydrometric stations, Kor river, Doroudzan dam watershed) | ||
| نویسندگان [English] | ||
| Abbas Rahdan1؛ Samad Mohsenihaftcheshmeh2؛ Hossein Yosefi3 | ||
| 1university of Tehran | ||
| 2university of TehDepartment of Reclamation of Arid and Mountainous Region, Faculty of Natural Resources, University of Tehranran | ||
| 3Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran | ||
| چکیده [English] | ||
| One of the effects of droughts on the catchment area is the impact on sediment production. The purpose of this study was to investigate the effect of drought on the amount of sediment production estimated by the sediment gauge curve located at the Chamriz hydrometric station. In this study, using the long-term data of the Chamriz hydrometric station located upstream of the Darudzen dam, the rate of changes in the produced sediment discharge in each year was calculated using different methods of the sediment curve. Then, by evaluating the applied methods, the best method for performing the subsequent analyses was selected (the non-parametric method (CF2)). Then, using the station's meteorological data, two SPI and RDI drought indicators were calculated, and finally, they were compared with the average annual sediment discharge rate. The results showed that by increasing the amount of drought index (SPI) and RDI (toward tiredness), the amount of sediment discharge increased, indicating the positive effect of climate conditions on the sediment yield of a basin. Finally, by examining the state of sediment production in many years of drought, it can be concluded that during the year of the drought, due to the effect of drought on vegetation status, soil moisture, and other factors, in the years after the occurrence Drought has caused a significant increase in sediment deposition compared to years when the drought was normal on the floor, and since then it has been terrible. | ||
| کلیدواژه‌ها [English] | ||
| Drought, sediment production, drought index, sediment rating curve, model evaluation | ||
| مراجع | ||
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