Asked 11th Jul, 2022

Why the Sediment transport rate is different for total simulation time and the accumulated monthly sediment drift rate?

Dear All,
I have an issue regarding a sediment transportation simulation. I have computed the sediment transport rate based on a 20 years wave climate, and simulated the sediment drift for the total time span and either by monthly filtering of the data, the monthly sediment transport is also computed. However there is a problem that the summation of monthly sediment transport is much more than what I have calculated for the total time span. Is it possible this happening? Is there any reason behind this?
I appreciate it if you could share your Idea with me.

All Answers (2)

15th Jul, 2022
Matthew Eliot
University of Western Australia
There are several potential reasons, which are hard to distinguish based on what you've written. However, the 'obvious' answer is that sediment transport is ALWAYS a timescale-dependent parameter. The cumulative answer will always be larger the shorter the timescale you are applying it to. This was discussed in some seminal papers like de Vriend et al (1991) and Cowell et al (2003), along with some discussion by Pilkey. For a 'light version' try Gallop et al (2015). It is one of the concepts behind 'morphological' parameters.
1 Recommendation
25th Jul, 2022
Saeideh Baghanian
Khaje Nasir Toosi University of Technology
I appreciate your valuable information and support.

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