بررسی عدم قطعیت‌های مدل مفهومی بارش-رواناب برای شبیه‌سازی حوضۀ آبریز طالقان با روش بیزین

نوع مقاله : پژوهشی

نویسندگان

1 دانشجوی دکتری مهندسی محیط زیست- منابع آب دانشکدۀ محیط زیست، پردیس دانشکده‏های فنی دانشگاه تهران

2 دانشیار دانشکدۀ محیط زیست، پردیس دانشکده‏های فنی دانشگاه تهران

چکیده

طالقان‌رود به دلیل منتهی شدن به سد طالقان که تأمین‏کنندۀ آب شرب این منطقه و نیز بخشی از شهر تهران است و نیز به دلیل استقرار مناطق مسکونی زیاد در حاشیۀ آن، یکی از رودخانه‏های مهم کشور محسوب می‏شود. داده‏های بلندمدت دبی رودخانه برای طراحی ایستگاه‏های برق‏آبی و مدیریت منابع آب ضروری‌اند. در جایی که ایستگاه‏های پایش موجود پراکنده است و نمی‏تواند داده‏های هیدرولوژیکی کافی برای حوضه فراهم کند، مدل‏های بارش-رواناب ابزارهایی پرکاربرد برای گسترش دادن داده‏های هیدرولوژیکی در زمان و مکان هستند. در مقالۀ حاضر امکان‏پذیری اعمال مدل مفهومی بارش-روانابی با نام HYMOD، به حوضۀ آبریز رودخانۀ طالقان بررسی شد‌. همچنین، سه روش تخمین بیزین برای برآورد عدم قطعیت‏های پارامتری برای کالیبراسیون مدل و تحلیل عدم قطعیت به‏کار گرفته شد. نتایج نشان می‏دهند با استفاده از این روش و پس از اعمال صحت‏سنجی، دبی تخمینی به طور رضایت‏بخشی با دبی مشاهداتی تطابق دارند؛ که بیانگر این است که شبیه‏سازی حوضۀ یادشده با استفاده از این مدل هیدرولوژیکی به‌خوبی انجام شده است و اعمال HYMOD برای تخمین سری‏های زمانی طولانی از دبی رودخانه در محدودۀ مطالعه‌شده، نتایج منطقی ارائه می‏دهد.

کلیدواژه‌ها


عنوان مقاله [English]

Investigation of Uncertainties in a Rainfall-Runoff Conceptual Model for Simulation of Basin using Bayesian Method

نویسندگان [English]

  • Zahra Sobhaniyeh 1
  • Mohammad Hossein Niksokhan 2
  • Babak Omidvar 2
1 Ph.D Candidate, School of Environment, College of Engineering, University of Tehran
2 Associate Professor, School of Environment, College of Engineering, University of Tehran
چکیده [English]

Taleghan River is among the most important rivers in Iran due to its flow to Taleghan Dam, supplying drinking water to this region in addition to being one of the sources for northwestern part of the city of Tehran. Long-term river discharge data are needed to design hydroelectric power stations and manage water resources. With the existing monitoring stations being scattered and not providing sufficient hydrological data for the basin, we employ rainfall-runoff models which are popular tools for expanding hydrological data over time and space. In this paper, the feasibility of applying a conceptual rainfall-runoff model called HYMOD to a part of Taleghan River Basin is investigated. The generalized probability estimation method was used for model calibration and uncertainty analysis. The results show that the observed discharges are satisfactorily consistent with the observations, indicating that the hydrological model is working well and applying HYMOD to estimate long time series of river discharge in the study area is turning reasonable results.

کلیدواژه‌ها [English]

  • Taleghanrood catchment
  • HYMOD
  • uncertainty
  • River discharge
  • Rainfall-Runoff Bayesian method
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