Posted April 22, 2026 · Submitted by Amara Okeke, University of Cape Town
Excessive groundwater extraction drives land subsidence that compounds relative sea-level rise across low-lying, rapidly urbanising deltas. Combining satellite geodesy with piezometric records, we map subsidence rates and attribute them to aquifer compaction. Scenario analysis indicates that managed aquifer recharge in targeted zones could halve projected subsidence over the coming decades, informing sustainable groundwater governance.
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Amara Okeke, Priya Nair (2026). Groundwater Depletion and Land Subsidence in a Rapidly Urbanizing Delta. TerraNova preprint.
Sofia Reyes, Henrik Vasquez
Nutrient export from agricultural catchments varies sharply with hydrological state, complicating efforts to manage downstream water quality. Using high-frequency in-stream chemistry, we demonstrate that nitrate export is governed by the ac…
Read preprint →Amara Okeke, Priya Nair, Liam O'Connor
Accurate monitoring of coastal wetland extent is hindered by gradual, sub-pixel land-cover transitions that conventional classification methods fail to capture. We train a convolutional segmentation model to map wetland extent across four d…
Read preprint →Amara Okeke, Sofia Reyes
Whether grazing management can durably enhance soil carbon storage remains contested. We report a three-year replicated field experiment contrasting continuous and rotational grazing on semi-arid grassland. Rotational grazing significantly…
Read preprint →