Dataset for the article "Pathways of water and sediment in the Biesbosch Freshwater Tidal Wetland"
datasetposted on 06.08.2018, 00:00 by Eveline van der DeijlEveline van der Deijl, M. (Marcel) van der Perk
This dataset was collected as part of the NWO-TTW project "Delta engineering - Drowning or Emerging (project no. 12431). This project and the fieldwork was facilitated by Staatsbosbeheer. In this project we aim to identify the flow paths of water and sediment in the Biesbosch, a small inland delta within the lower Rhine and Meuse delta, in the southwest of the Netherlands. This area forms a network of channels that connect previously embanked areas, in which water and sediment have been reintroduced by newly created river diversions. Specific objectives of this study were to determine the major flow paths of water and sediment to, within, and out of the system and to determine the relative contribution of the feeding Rivers Rhine and Meuse to the sediment budget of the channels and surrounding wetlands. Moreover, this study explored the usefulness of synoptic moving boat measurements for gaining a quick overview of sediment transport and pathways in deltas within a short period of time. For this purpose, we compared sediment budgets using existing series of observations of channel depth with sediment budgets derived from synoptic field surveys to document water flow and sediment concentrations within the Biesbosch freshwater tidal channel-wetland system. For this, we used the data from this dataset, which comprises: 1) polygons of large channel sections , 2) the water surface of the study area, 3) polygons of channel sections for VADCP data analysis, 4) Difference in channel bed level for the monitoring period, 5) Depthmean velocities as measured during the synoptic monitoring campaigns, and 6) suspended sediment concentrations, electrical conductivity, and water depth, as measured during the synoptic monitoring campaigns. Channel bed elevation was measured by Rijkswaterstaat during bathymetric surveys for the years 2007 and 2013. Within the period 26-11-2015 to 13-5-2016, 13 moving boat campaigns were carried out to obtain synoptic snapshots of water flow velocities, directions, and origin, and suspended sediment concentrations.