چكيده لاتين :
Time-Area method is one ofthe most widely applied techniques ofwatershed routing, and
can be potentially used as a distributed model. In this paper, afundamental flaw in the arrangement
of subareas in the original time-area histogram is identified for one-dimensional flow. This is
conducted on the basis ofcomparing time-area hydrograph with that ofthe 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.
