Mon Aug 24, F. Flechtner
• Sorted by Date • Sorted by Last Name of First Author •
Wu, Chengcheng, Park, Edward, Tran, Dung Duc, Wang, Jingyu, Le Duy, Nguyen, Vasilopoulos, Grigorios, and Lu, Chengpeng, 2026. Impact of sand mining on groundwater–surface water interactions in the Vietnamese Mekong Delta. Journal of Hydrology, 677:135874, doi:10.1016/j.jhydrol.2026.135874.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2026JHyd..67735874W,
author = {{Wu}, Chengcheng and {Park}, Edward and {Tran}, Dung Duc and {Wang}, Jingyu and {Le Duy}, Nguyen and {Vasilopoulos}, Grigorios and {Lu}, Chengpeng},
title = "{Impact of sand mining on groundwater-surface water interactions in the Vietnamese Mekong Delta}",
journal = {Journal of Hydrology},
keywords = {Sand extraction, Groundwater depletion, Surface water-groundwater interaction, GRACE, Mekong Delta},
year = 2026,
month = sep,
volume = {677},
eid = {135874},
pages = {135874},
abstract = "{Sand mining is a pressing socio-environmental concern in the Vietnamese
Mekong Delta (VMD), profoundly reshaping river morphology,
sediment transport, and hydrological processes. Although
previous research has identified the adverse effects of sand
extraction on surface water and channel morphology, its impact
on groundwater has never been examined. This study addresses
this unexplored relationship by providing the first
investigation of how sand mining influences groundwater storage
and surface water--groundwater (SW--GW) interactions, using an
integrated approach of long-term field observations, remote
sensing data, and hydrological records. Spatiotemporal analyses
reveal a declining trend in groundwater storage anomalies (GWSA)
and groundwater levels (GWLs), particularly in areas of intense
mining activity. GWL decline rates in the unconfined aquifers
within 1995--2017 vary spatially with a mean decline of 0.03
m/year. The maximum rate of GWL decline is 0.09 m/year and
observed at the northeast and the minimum rate is 0.01 m/year
and observed at coastal delta. GWSA has declined over 20 years
in three phases: a sharp decrease (2002--2006, 3.2 {\texttimes}
{}10$^{7}$ m$^{3}$/year), partial recovery (2006--2015, 8
{\texttimes} {}10$^{6}$ m$^{3}$/year), and a slower decline
(since 2015, 4 {\texttimes} {}10$^{6}$ m$^{3}$/year). The
findings indicate that extensive riverbed incision caused by
sand mining deepens channels, disrupts sediment redistribution,
and accelerates groundwater depletion while reducing aquifer
recharge. As a result, riverbed hydraulic connectivity is
weakened, leading to a diminished SW-GW exchange. A conceptual
model is proposed to illustrate the mechanisms driving these
changes. These insights suggest that regulating sand extraction
intensity, monitoring incision hotspots, and integrating
sediment management with groundwater governance may help
mitigate long-term hydrological degradation in the VMD and
similar large deltas.}",
doi = {10.1016/j.jhydrol.2026.135874},
adsurl = {https://ui.adsabs.harvard.edu/abs/2026JHyd..67735874W},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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