Geographic information system data considerations in the context of the enhanced bathtub model for coastal inundation

Williams, LLLück-Vogel, Melanie2022-11-072022-11-072022-10Williams, L. & Lück-Vogel, M. 2022. Geographic information system data considerations in the context of the enhanced bathtub model for coastal inundation. Transactions in GIS. http://hdl.handle.net/10204/125201361-16821467-9671https://doi.org/10.1111/tgis.12995http://hdl.handle.net/10204/12520This study determines input data appropriateness for geographic information system-based enhanced bathtub model (eBTM) modeling of coastal inundation in an urban setting. Various tests were conducted concerning digital surface models (DSMs) to determine: (a) the highest appropriate resolution achievable from available LiDAR data and consider variations between derived sub-meter DSMs; (b) optimal DSM horizontal resolution for coastal inundation modeling based on “out-the-box” solutions; and (c) mechanisms to address the challenge presented by DSMs regarding overhanging structures for a study site in False Bay, South Africa. Results showed that while sub-meter DSMs are achievable, low point cloud densities may result in the misrepresentation of structures, which affects the inundation extents. High horizontal resolution DSMs are required for inundation modeling in an urban setting to account for narrow thoroughfares. Challenges posed by first return LiDAR depicting bridges as solid structures could be circumvented by modifying the input water source for the eBTM processing.AbstractenEnhanced bathtub modeleBTMDigital surface modelsDSMGeographic information system data considerations in the context of the enhanced bathtub model for coastal inundationArticleWilliams, L., & Lück-Vogel, M. (2022). Geographic information system data considerations in the context of the enhanced bathtub model for coastal inundation. Transactions in GIS, http://hdl.handle.net/10204/12520Williams, LL, and Melanie Lück-Vogel "Geographic information system data considerations in the context of the enhanced bathtub model for coastal inundation." Transactions in GIS (2022) http://hdl.handle.net/10204/12520Williams L, Lück-Vogel M. Geographic information system data considerations in the context of the enhanced bathtub model for coastal inundation. Transactions in GIS. 2022; http://hdl.handle.net/10204/12520.TY - Article AU - Williams, LL AU - Lück-Vogel, Melanie AB - This study determines input data appropriateness for geographic information system-based enhanced bathtub model (eBTM) modeling of coastal inundation in an urban setting. Various tests were conducted concerning digital surface models (DSMs) to determine: (a) the highest appropriate resolution achievable from available LiDAR data and consider variations between derived sub-meter DSMs; (b) optimal DSM horizontal resolution for coastal inundation modeling based on “out-the-box” solutions; and (c) mechanisms to address the challenge presented by DSMs regarding overhanging structures for a study site in False Bay, South Africa. Results showed that while sub-meter DSMs are achievable, low point cloud densities may result in the misrepresentation of structures, which affects the inundation extents. High horizontal resolution DSMs are required for inundation modeling in an urban setting to account for narrow thoroughfares. Challenges posed by first return LiDAR depicting bridges as solid structures could be circumvented by modifying the input water source for the eBTM processing. DA - 2022-10 DB - ResearchSpace DP - CSIR J1 - Transactions in GIS KW - Enhanced bathtub model KW - eBTM KW - Digital surface models KW - DSM LK - https://researchspace.csir.co.za PY - 2022 SM - 1361-1682 SM - 1467-9671 T1 - Geographic information system data considerations in the context of the enhanced bathtub model for coastal inundation TI - Geographic information system data considerations in the context of the enhanced bathtub model for coastal inundation UR - http://hdl.handle.net/10204/12520 ER -26160