The three-dimensional groundwater salinity distribution and fresh groundwater volumes in the Mekong Delta, Vietnam, inferred from geostatistical analyses

نویسندگان

چکیده

Abstract. Over the last decades, economic developments in Vietnamese Mekong Delta have led to a sharp increase groundwater pumping for domestic, agricultural and industrial use. This has resulted alarming rates of land subsidence salinization. Effective management, including strategies work towards sustainable use, requires knowledge about current salinity distribution, particular available volumes fresh groundwater. At moment, no comprehensive dataset spatial distribution is available. To create 3D model total dissolved solids (TDS), an existing geological thickness aquifers aquitards updated. Next, maps drainable porosity each aquifer are interpolated based on sedimentological description borehole data. Measured TDS groundwater, inferred from resistivity measurements boreholes soft incomplete data (derived domestic wells) combined indicator kriging routine obtain full probability (x,y,z) location. statistical with yields estimates volume (TDS < 1 g L?1) aquifer. Uncertainty these follow Monte Carlo analysis (sequential simulation). Results yield estimated 867 billion cubic metres uncertainty range 830–900 metres, which somewhat higher than previous assessments volumes. The resulting can instance be used flow salt transport modelling as well storage recovery projects support informed management decisions, e.g. prevent further salinization system subsidence, at https://doi.org/10.5281/zenodo.4441776 (Gunnink et al., 2021).

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ژورنال

عنوان ژورنال: Earth System Science Data

سال: 2021

ISSN: ['1866-3516', '1866-3508']

DOI: https://doi.org/10.5194/essd-13-3297-2021