Print Email Facebook Twitter Observations of cross-shore chenier dynamics in Demak, Indonesia Title Observations of cross-shore chenier dynamics in Demak, Indonesia Author Tas, S.A.J. (TU Delft Environmental Fluid Mechanics) van Maren, D.S. (TU Delft Environmental Fluid Mechanics; Deltares) Reniers, A.J.H.M. (TU Delft Environmental Fluid Mechanics) Date 2020 Abstract Cheniers are important for stabilising mud-dominated coastlines. A chenier is a body of wave-reworked, coarse-grained sediment consisting of sand and shells overlying a muddy substrate. In this paper we present and analyse a week of field observations of the dynamics of a single chenier along the coast of Demak, Indonesia. Despite relatively calm hydrodynamics during the one-week observational period, the chenier migrated surprisingly fast in the landward direction. The role of the tide and waves on the cross-shore chenier dynamics is explored using velocity moments as a proxy for the sediment transport. This approach shows that both tide and waves are capable of transporting the sediment of the chenier system. During calm conditions (representative for the south-east monsoon season), the tides generate a landward-directed sediment transport when the chenier crest is high relative to mean sea level. Waves only generate substantial sediment transport (direct, via skewness, and indirect, via stirring) when the chenier is submerged during periods with higher waves. The cross-shore chenier dynamics are very sensitive to the timing of tide and waves: most transport takes place when high water levels coincide with (relatively) high waves. Subject CheniersField measurementsIndonesiaMangrovesMuddy coastSediment transport To reference this document use: http://resolver.tudelft.nl/uuid:9836848e-1ce2-4407-97b6-6a0e6fab4c36 DOI https://doi.org/10.3390/jmse8120972 ISSN 2077-1312 Source Journal of Marine Science and Engineering, 8 (12), 1-18 Part of collection Institutional Repository Document type journal article Rights © 2020 S.A.J. Tas, D.S. van Maren, A.J.H.M. Reniers Files PDF jmse_08_00972_v2.pdf 3.51 MB Close viewer /islandora/object/uuid:9836848e-1ce2-4407-97b6-6a0e6fab4c36/datastream/OBJ/view