A corrected time-area technique for one-dimensional flow

نویسندگانSaghafian, B - Shokoohi, A.R
نشریهInternational Journal of Civil Engineering
ارائه به نام دانشگاهSoil Conservation & Watershed Management Institute, Tehran, Iran
شماره صفحات34-41
شماره مجلد4
نوع مقالهFull Paper
تاریخ انتشار2006
رتبه نشریهISI
نوع نشریهچاپی
کشور محل چاپایران

چکیده مقاله

Time–Area method is one of the most widely applied techniques of watershed routing, and can be potentially used as a distributed model. In this paper, a fundamental flaw in the arrangement of subareas in the original time-area histogram is identified for one-dimensional flow. This is conducted on the basis of comparing time-area hydrograph with that of the kinematic wave theorem. Accordingly, a revised time-area algorithm is developed as a substitute for the original time-area. It is proved that in the revised approach, subareas must be reversely arranged. It is also shown that the revised time-area hydrograph is in perfect agreement with the hydrograph derived by the kinematics wave theory.

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