Longitudinal training dams (LTDs) are constructed in the River Waal in the Netherlands. They are aligned parallel to the river shore and divide the river into a main and side channel. The existing groynes are removed yielding more discharge capacity at high flows. The side channel creates possibly a sheltered environment for species compared to the traditional groyne field (Collas, 2014). Although the lay-out of the LTDs has been extensively studied using numerical models (e.g. Huthoff et al., 2011), the morphodynamic response is yet unclear and depends strongly on the dimensions (length and height) of the openings. The inlet and openings (see Fig. 1) are sill-type structures which can be changed relatively easy. These sills are designed in such a way that they serve as a barrier for water and bed load sediment. To make long-term morphological predictions, it is necessary to understand the bed load transport processes over these sills. Suspended sediment transport is not considered in this study. We developed an analytical model to predict sediment transport paths on a slope, using a correction on the well-known critical Shields parameter.
|Publication status||Published - 2017|
|Event||NCR-Days 2017 - Wageningen, Netherlands|
Duration: 1 Feb 2017 → 3 Feb 2017
|Period||1/02/17 → 3/02/17|
|Other||Netherlands Centre for River Studies is a corporation of the Universities of Delft, Utrecht, Nijmegen, Twente and Wageningen, UNESCO-IHE, RWS-WVL and Deltares|