Print Email Facebook Twitter Impact of Coral Reef Mining Pits on Nearshore Hydrodynamics and Wave Runup During Extreme Wave Events Title Impact of Coral Reef Mining Pits on Nearshore Hydrodynamics and Wave Runup During Extreme Wave Events Author Klaver, S. (Deltares; National University of Singapore; Royal HaskoningDHV; Student TU Delft) Nederhoff, C. M. (Deltares) Giardino, A. (Deltares) Tissier, M.F.S. (TU Delft Environmental Fluid Mechanics) van Dongeren, A. R. (Deltares; IHE Delft Institute for Water Education) van der Spek, A.J.F. (TU Delft Coastal Engineering; Deltares) Date 2019 Abstract Small island developing states are among the most vulnerable areas to the impact of natural hazards and climate change. Flooding due to storm surges and extreme waves, coastal erosion, and salinization of freshwater lenses are already a serious threat and could lead to irreversible consequences in the coming decades. Reef flat mining is one of the most common practices to source the required material for the implementation of coastal protection measures, but concerns remain that partial removal of the protective reef could increase wave loading on the islands. However, the available data and knowledge on the effects of these mining pits are currently very limited. This study provides new insights on the effects that pits may have on nearshore hydrodynamics and wave runup. Results are based on a large numerical data set of fringing reefs, derived using the validated XBeach nonhydrostatic+ process-based model. Model results indicate that excavation pits cause a decrease in infragravity wave energy around the fundamental mode of the reef, which is partly caused by reduced wave transmission. Additionally, changes in sea and swell wave energy are attributed to reduced transmission, “a decrease” in wave dissipation, and (triad) wave–wave interaction. Furthermore, in 13% of all modeled cases, an increase in wave runup is observed, mainly due to more sea and swell wave energy reaching the shoreline. This probability is lowest for narrow pits relative to the reef flat width or pits located further from shore. Subject coastal floodingcoral reefshydrodynamicsmining pitswave runupXBeach To reference this document use: http://resolver.tudelft.nl/uuid:e7cb786d-1392-4528-8e4d-199fd447ec89 DOI https://doi.org/10.1029/2018JC014165 ISSN 2169-9275 Source Journal Of Geophysical Research-Oceans, 124 (4), 2824-2841 Part of collection Institutional Repository Document type journal article Rights © 2019 S. Klaver, C. M. Nederhoff, A. Giardino, M.F.S. Tissier, A. R. van Dongeren, A.J.F. van der Spek Files PDF Klaver_et_al_2019_Journal ... Oceans.pdf 2.08 MB Close viewer /islandora/object/uuid:e7cb786d-1392-4528-8e4d-199fd447ec89/datastream/OBJ/view