نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد، گروه مهندسی آب، دانشکده کشاورزی، دانشگاه ایلام
2 استادیار، گروه مهندسی آب، دانشکده کشاورزی، دانشگاه ایلام
چکیده
شبکه‌های جمع‌آوری آب‌های سطحی وظیفه جمع‌آوری، انتقال و هدایت آنها را به نزدیک‌ترین نقطه خروجی قابل قبول به عهده دارند. در این پژوهش، شبیه‌سازی و ارزیابی سامانه انتقال رواناب شهر ایلام با مدل ریاضی ASSA که به‌وسیله شرکت اتودسک توسعه یافته، انجام گرفت. در این تحقیق، کل منطقه مورد مطالعه شهر ایلام را که شامل حوضه داخل و خارج شهر است، به 46 زیرحوضه تقسیم شد. خصوصیات فیزیکی هر یک از زیرحوضه‌ها با استفاده از نرم‌افزار ArcGIS و پیمایش میدانی مشخص شد. درون شهر ایلام چهار مسیل اصلی وجود دارد که رواناب زیرحوضه‌ها را به خارج از شهر هدایت می‌کنند. رواناب حاصل از زیرحوضه‌ها با سه روش استدلالی، استدلالی اصلاح‌شده و SWMM محاسبه شد. نتایج پژوهش نشان داد، سامانه جمع‌آوری شهر ایلام تنها در دوره بازگشت دو سال توانایی انتقال سیلاب را دارد و در دوره‌های بازگشت پنج سال و بالاتر، قسمت عمده‌ای از مسیل‌های اصلی درون شهر، دچار طغیان شده و باعث آب‌گرفتگی و خسارت در محیط شهری می‌شوند و لذا، سامانه جمع‌آوری کارایی خود را از دست می‌دهد.
کلیدواژه‌ها
عنوان مقاله [English]
Application of rainfall-runoff methods in hydrological analysis of Ilam City collecting runoff networks
نویسندگان [English]
- Mozhdeh Mohamadi 1
- Jafar Mamizadeh 2
- Eghbal Ehsanzadeh 2
1 MSc Student, Faculty of Agriculture, Ilam University, Ilam, Iran
2 Assistant Professor, Faculty of Agriculture, Ilam University, Ilam, Iran
چکیده [English]
Surface water collection networks are responsible for collecting, transporting and directing runoff to the nearest acceptable outlet. In this research, simulation and evaluation of Ilam City runoff system with the ASSA mathematical model developed by the Autodesk Inc. was carried out. In the present research, the entire study area, which includes in-city and outsides, was divided into 46 sub-basins. The physical properties of each sub-basin were determined using the ArcGIS software and field investigation. Within the Ilam City there are four main channels that lead the runoff of sub-basins out of the city. The runoff from sub-basins was calculated using three methods of rational, modified rational and SWMM. The results of the study showed that the collecting system only had a flood transfer ability during the two year return period and during the return periods greater than five years the major part of the main channels in the city were waterlogged and damaged.
کلیدواژه‌ها [English]
- ArcGIS
- ASSA software
- Rainfall
- Rational
- Runoff
- Subbasin
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