Abstract
SUMMARY In case of natural watercourses a permanent, gradually varying flow occurs only very rarely. Moreover at those wa*** courses where bed-load has a role, nearly always non-steady flow is the case. Any change in the flow evidently affects the dist*** covered by one step and the lengths of the rest periods between the single steps. For this reason no restriction has been m*** in the model for the density functions characteristic of the distribution of step lengths of a studied particle as of random *** ables, that is the step lengths are independent of each other and they represent a random variable having not necessarily only type of density function. As it is well-known, Einstein (2) supposed the distances covered by one step to be equal; while Hul and Sayre (15) applied in their model as starting condition the approach that the step lengths of the bed-load are of exponer*** distribution. To take into account the rest periods caused real difficulties at establishing the model. According to the perio...
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
