MERIT Hydro: A High‐Resolution Global Hydrography Map Based on Latest Topography Dataset
Tokyo Institute of Technology · The University of Tokyo · +3 more institutions
Abstract
Abstract High‐resolution raster hydrography maps are a fundamental data source for many geoscience applications. Here we introduce MERIT Hydro, a new global flow direction map at 3‐arc sec resolution (~90 m at the equator) derived from the latest elevation data (MERIT DEM) and water body data sets (G1WBM, Global Surface Water Occurrence, and OpenStreetMap). We developed a new algorithm to extract river networks near automatically by separating actual inland basins from dummy depressions caused by the errors in input elevation data. After a minimum amount of hand editing, the constructed hydrography map shows good agreement with existing quality‐controlled river network data sets in terms of flow accumulation…
Citation impact
- FWCI
- 55.34
- Percentile
- 100%
- References
- 25
Authors
6Topics & keywords
- Hydrography
- Streamflow
- Elevation (ballistics)
- Hydrology (agriculture)
- Physiographic province
- Surface runoff
- Remote sensing
- Channel (broadcasting)
- Climate action