تحلیل رگبارهای حوضه سد کرخه و استخراج هیتوگراف طرح به روش هاف

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری مهندسی منابع آب، گروه آب دانشکده کشاورزی دانشگاه تبریز

2 دانشیار، گروه آب دانشکده کشاورزی دانشگاه تبریز

3 استادیار، گروه آب دانشکده کشاورزی دانشگاه تبریز

چکیده

تهیه هیتوگراف طرح در تعیین دقیق ابعاد شبکه‌های زهکش‌های شهری مهم است. یکی از مسائل مهم مرتبط با سیلاب‌ها، انتقال آب ناشی از آن بدون آسیب زدن به تأسیسات، مزارع، مناطق مسکونی و... است. این کار مستلزم تخمین دقیق مقدار سیل و سپس ابعاد مجاری آبروها، پل‌ها، دیواره سیل‌بند، کالورت و ... می‌باشد. هدف این تحقیق، رسم منحنی‌های هاف و هیتوگراف رگبار در شش ایستگاه در حوضه بالادست سد کرخه است. برای رسم منحنی‌های هاف از داده‌های باران‌نگار ثبات در ایستگاه‌های کامیاران، آبدانان، دره‌شهر، آران، کرند و کرمانشاه استفاده شد. برای این منظور، تعداد 1191 رگبار ثبت شده، در فصول مختلف و در 5 کلاس زمانی دسته‌بندی گردید. منحنی‌های هاف با استفاده از اطلاعات مذکور برای هر دسته، در هر فصل، رسم گردید. همچنین، رویدادهای هر دسته در یک فصل مشخص در یک گروه کلی ادغام و منحنی هاف هر کدام رسم گردید. به منظور مقایسه توزیع زمانی بارش ایستگاه‌های مختلف، سه شاخص جدید S، I و Q تعریف گردید که هر کدام به ترتیب، نسبت بارش تجمعی رسیده به‌ترتیب، در 25، 50 و 75 درصد مدت زمان بارش قرائت شده از منحنی هاف 10% به مقدار نظیر در منحنی 50% تعریف گردید. نتایج نشان داد، تقریباً در همه ایستگاه‌ها، مقدار کمیت شاخص S بیشتر از I و هر دو، بیش از شاخص Q بود. در ادامه، برای هر منحنی هاف، هیتوگراف رگبار طرح با استفاده از منحنی احتمال 50% استخراج شد. نتایج این مطالعه در مدیریت آب‌های سطحی در حوضه مورد مطالعه کاربرد دارد.

کلیدواژه‌ها


عنوان مقاله [English]

Analysis of storms of Karkheh dam basin and extraction of design hyetographs using the Huff method

نویسندگان [English]

  • ES Alavi 1
  • Y Dinpashoh 2
  • E Asadi 3
1 Ph.D student of Water Recourses Engineering, Department of Water Eng., Faculty of Agriculture, University of Tabriz.
2 Associate Professor, Department of Department of Water Eng., Faculty of Agriculture, University of Tabriz.
3 Assistant Professor, Department of Department of Water Eng., Faculty of Agriculture, University of Tabriz.
چکیده [English]

Providing design hyetograph is an important issue in accurate determination of urban drainage networks. One of the important relevant problems of floods, is its safe transmition without any damage to facilities, farms, habitat buildings and so on. This needs accurate determination of flood quantity and then dimensions of water pass ways, bridges, flash walls, culverts, and so on. The aim of this research is plotting the Huff curves and design storm hyetographs in the six selected stations in upstream of Karkheh dam watershed. In order to design of Huff curves, the recorded date of Kamiaran, Abdanan, Darreh-shahr, Kerned, and Kermanshah were used. For this purpose, the 1191 recorded storms classified in different seasons and in five classes of rainfall durations. The Huff curves were illustrated using the mentioned information for each of the classes as well as the seasons. Furthermore, all the events in a given class and season merged in a universal distinct class and then their Huff curves were plotted too. In order to possibility of comparison of temporal distribution of rainfalls in stations, three new indices denoted by S, I, and Q were defined, each of them shows the ratio of cumulative rain depths received in 25, 50 and 75 percentages of storm durations extracted from the 10 percent Huff curves to the corresponding values obtained from the 50 percent Huff curve.  Results showed that nearly in all the stations the quantity of S-index was greater than I-index, and both of them were greater than Q-index. Results of this study have practical application in surface water management in the watershed area.

کلیدواژه‌ها [English]

  • Design Hyetograph
  • Design storm
  • Design flood
  • Huff curve
  • Temporal distribution of rainfall
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