NASADEM and MERITDEM are available at 90m and 1km resolutionsĮach global dataset - i.e., each DEM/resolution pair - is in a folder named according to:.This collection includes multiple global flood datasets derived from three different DEMs ( NASA, MERIT, and LIDAR) and at different resolutions. Within that folder, data are organized according to one path structure for global datasets and one path structure for historic event datasets. LIDAR is the Global LiDAR Lowland DTM (GLL_DTM_v1).ĭata are stored in netCDF files in Azure Blob Storage in the West Europe Azure region, in the following folder:.MERITDEM is the Multi-Error-Removed Improved Terrain DEM, derived from SRTM and AW3D.NASADEM is the SRTM-derived NASADEM product.This documentation will refer to three DEMs: See the complete methodology documentation for more information. Flood extents must thus be interpreted as the area that is potentially exposed to flooding without coastal protection. It also does not include the mitigating effect of coastal flood protection. In its current version, the model does not account for varying roughness over land and permanent water bodies such as rivers and lakes, and it does not account for the compound effects of waves, rainfall, and river discharge on coastal flooding. The attenuation factor simulates the dampening of the flood levels due to the roughness over land. Unlike a simple ‘bathtub’ model, this model attenuates the water level over land with a maximum attenuation factor of 0.5 m km-1. The water level at the coastline is extended landwards to all areas that are hydrodynamically connected to the coast following a ‘bathtub’ like approach and calculates the flood depth as the difference between the water level and the topography. At the coastline, the model is forced by extreme water levels containing surge and tide from GTSMip6. Deltares Global Flood Map Notebooks and documentation for AI-for-Earth-managed datasets on Azure View on GitHub Deltares Global Flood Map Overviewĭeltares has produced inundation maps of flood depth using a model that takes into account water level attenuation and is forced by sea level. Deltares Global Flood Map | AIforEarthDataSets Skip to the content.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |