Open Access2DH COMPUTATION OF TRANSIENT SEA BED EVOLUTIONS
Author(s) -
H.J. de Vriend
Publication year - 1986
Publication title -
proceedings of conference on coastal engineering/proceedings of ... conference on coastal engineering
Language(s) - English
Resource type - Journals
eISSN - 2156-1028
pISSN - 0589-087X
DOI - 10.9753/icce.v20.123
Subject(s) - computation , sediment transport , transient (computer programming) , flow (mathematics) , current (fluid) , harmonic , geology , sediment , mechanics , diffraction , mathematical model , geomorphology , geotechnical engineering , oceanography , physics , mathematics , computer science , optics , algorithm , operating system , quantum mechanics
The interaction between the constituent models for waves, currents, sediment transport and bottom level changes in a class of compound 2DH mathematical models of transient sea bed evolutions in the coastal zone is investigated mathematically, using the theory of characteristics and a harmonic analysis technique. This leads to contrary indications as to the importance of including diffraction in the wave model and to the unambiguous conclusion that the bottom slope effect on the sediment transport is indespensable for the mathematical system to be inherently stable. This conclusion is shown to imply that depth-integrated current model are insufficient to describe the flow in this type of morphological computations for the nearshore zone or complex coastal areas.