project objectives

The overarching aim of this project is to develop a quantitative understanding of the morphodynamics and sedimentology of the tidally-influenced fluvial zone (TIFZ). This aim will be addressed through accomplishing the following objectives:

  1. Quantify the bed morphology of the TIFZ, identify the principal bedforms and track the development of bars through use of historical data and production of repeat high-resolution DEMs.
  2. Quantify the 3D flow field, bedload and suspended load transport rates and grain size over and around key bars, on flood, ebb, spring/neap tides and the freshet.
  3. Determine the relationships between flow structure, sediment transport, bedform dynamics, bar morphology, and their dependence on different fluvial and tidal flows using Delft3D with boundary conditions derived from
    1 and 2.
  1. Establish the typical facies type and thickness, frequency and spatial distribution of different elements of the alluvial architecture of large bars in the TIFZ.
  2. Distinguish the diagnostic structures of fluvial, fluvial-tidal and tidal-fluvial deposits across and down the TIFZ.
  3. Adapt and apply Delft3D to the TIFZ to simulate channel and bar evolution over time periods of days, years and decades and produce the preserved stratigraphy for comparison to data from 4.