Global River Deltas and vulnerability¶
Global river delta dataset combines 2174 delta locations with polygons that define delta area. We define delta area as the extent of geomorphic activity created by deltaic channel movement, and delta progradation. We focus on channel network activity because it defines the most flood-prone zone and creates the resources and natural infrastructures that make deltas attractive sites for habitation. We define deltaic polygons with five points that encompass deltaic activity. These five points mark visible traces of deltaic activity with two points capturing the lateral extent of deposition along the shoreline, and with three points enclosing the up and downstream extent of deposition. The convex hull around these five points defines a delta polygon. You can read the open source paper here and you can download the data used to create the feature collection from the supplementary material here.
Earth Engine Snippet¶
var convex_hull = ee.FeatureCollection("projects/sat-io/open-datasets/delta/delta-convex-hull"); var convex_hull_bound = ee.FeatureCollection("projects/sat-io/open-datasets/delta/delta-convex-bounds");
Edmonds, Douglas A., Rebecca L. Caldwell, Eduardo S. Brondizio, and Sacha MO Siani. "Coastal flooding will disproportionately impact people on river deltas." Nature communications 11, no. 1 (2020): 1-8.
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Curated by: Samapriya Roy
Keywords: : Fluvial Geomorphology, Hydrology, Rivers, Coastal Rivers, Tidal, River Mouth, Vulnerability, Poverty
Last updated: 2021-04-24