| Description |
MERIT Hydro is a high-resolution global hydrography dataset developed to enhance the accuracy of river networks and watershed boundaries. By correcting errors in existing digital elevation models, it provides detailed information on river flow directions, streamlines, and catchment areas. The dataset is utilized in hydrological modeling and water resource management. |
| Folder |
/datasets/geospatial/MERIT_Hydro |
| Discipline |
Geospatial / Hydrology / Earth Sciences |
| DOI |
10.1029/2019WR024873 |
| Link |
Access Data |
| Public |
true |
| Publication Date |
2019-05-28 |
| Downloaded |
2024-12-05 |
| Data Type |
GeoTIFF rasters |
| Dataset Size |
197G |
| Number of Files |
6903 |
| Usage |
$ module avail
$ module load datasets
$ module load geospatial/MERIT_Hydro/2019-05-28 |
| Usage Policy Link |
http://creativecommons.org/licenses/by/4.0/, https://opendatacommons.org/licenses/odbl/1-0/ |
| Usage Policy |
This dataset is distributed under a dual license: Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) and the Open Data Commons Open Database License (ODbL 1.0). Users may use, share, adapt, and redistribute the data provided that proper credit is given to the original authors and source, a link to the license is included (https://creativecommons.org/licenses/by-nc/4.0/ or https://opendatacommons.org/licenses/odbl/1-0/), and any modifications are clearly indicated. Under CC BY-NC 4.0, use is restricted to non-commercial purposes; under ODbL 1.0, derivative databases must be shared under the same license terms. Redistribution of the full dataset in its original form is not permitted without permission from the authors. Users are responsible for ensuring that the dataset is appropriate for their applications. |
| Citation |
Yamazaki, D., Ikeshima, D., Sosa, J., Bates, P. D., Allen, G. H., & Pavelsky, T. M. (2019). MERIT Hydro: a high-resolution global hydrography map based on latest topography dataset. Water Resources Research, 55, 5053–5073. https://doi.org/10.1029/2019WR024873 |
| BibTeX |
📜 View BibTeX citation@article{https://doi.org/10.1029/2019WR024873,
author = {Yamazaki, Dai and Ikeshima, Daiki and Sosa, Jeison and Bates, Paul D. and Allen, George H. and Pavelsky, Tamlin M.},
title = {MERIT Hydro: A High-Resolution Global Hydrography Map Based on Latest Topography Dataset},
journal = {Water Resources Research},
volume = {55},
number = {6},
pages = {5053-5073},
keywords = {global hydrology, hydrography, river network, topography},
doi = {https://doi.org/10.1029/2019WR024873},
url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019WR024873},
eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2019WR024873},
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 area and river basin shape. The location of river streamlines was realistically aligned with existing satellite-based global river channel data. Relative error in the drainage area was <0.05 for 90\% of Global Runoff Data Center (GRDC) gauges, confirming the accuracy of the delineated global river networks. Discrepancies in flow accumulation area were found mostly in arid river basins containing depressions that are occasionally connected at high water levels and thus resulting in uncertain watershed boundaries. MERIT Hydro improves on existing global hydrography data sets in terms of spatial coverage (between N90 and S60) and representation of small streams, mainly due to increased availability of high-quality baseline geospatial data sets. The new flow direction and flow accumulation maps, along with accompanying supplementary layers on hydrologically adjusted elevation and channel width, will advance geoscience studies related to river hydrology at both global and local scales.},
year = {2019}
} |