Veins of the Earth: a Flexible Framework for Mapping, Modeling, and
Monitoring the Earth’s River Networks
Abstract
The tandem rise in satellite-based observations and computing power has
changed the way we (can) see rivers across the Earth’s surface. Global
datasets of river and river network characteristics at unprecedented
resolutions are becoming common enough that the sheer amount of
available information presents problems itself. Fully exploiting this
new knowledge requires linking these geospatial datasets to each other
within the context of a river network. In order to cope with this wealth
of information, we are developing Veins of the Earth (VotE), a flexible
system designed to synthesize knowledge about rivers and their networks
into an adaptable and readily-usable form. VotE is not itself a dataset,
but rather a database of relationships linking existing datasets that
allows for rapid comparison and exports of river networks at arbitrary
resolutions. VotE’s underlying river network (and drainage basins) is
extracted from MERIT-Hydro. We link within VotE a newly-compiled dam
dataset, streamflow gages from the GRDC, and published global river
network datasets characterizing river widths, slopes, and intermittency.
We highlight VotE’s utility with a demonstration of how vector-based
river networks can be exported at any requested resolution, a global
comparison of river widths from three independent datasets, and an
example of computing watershed characteristics by coupling VotE to
Google Earth Engine. Future efforts will focus on including real-time
datasets such as SWOT river discharges and ReaLSAT reservoir areas.