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Çѱ¹¼öÀÚ¿øÇÐȸ / v.35, no.6, 2002³â, pp.715-727
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( Development of an Estimation Method for Travel Time )
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The travel time of a flood through a river reach can be estimated by dividing the river length by the mean velocity with which the flood passes downstream. It is closely related to storage constant for the watershed routing of a flood. There are so many empirical formulas available for the estimation of travel time but the results computed generally show great different depending on individual formulas. In the present study, the mean velocity data computed in the process of water surface profile computation for a probability flood through more than 100 different river reaches were collected along with the mean river bed slope of each river reach. And then, a regression analysis is made between the mean river bed slope and the mean velocity, which showed a wide scatter along the mean regression curve, which appears to be due to the different in the magnitude of probability rainfall and size of watershed area. Therefore, methods have been developed to remove the effect of these factors and generalized empirical equation is proposed to relate the mean velocity to mean river bed slope of a reach. Hence, if the mean river bed slope of a river reach is estimated from the longitudinal river profile, the mean velocity can be computed by the generalized equation along with the probability rainfall and watershed area of the river reach under consideration, which leads to the estimation of travel time through a river reach.
 
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µµ´Þ½Ã°£;Æò±ÕÀ¯¼Ó;Æò±Õ°æ»ç;travel time;mean velocity;mean river bed slope;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.35, no.6, 2002³â, pp.715-727
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200211921477194)
¾ð¾î : Çѱ¹¾î
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