2026-10-14T05:13:02Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33995340 2026-09-25T13:20:41Z category_7 category_272 category_45 category_64 category_135 portal_87 item_type_3 month_year_09_2026

Quantifying unregistered groundwater via census-registry integration for Chile Héctor Leopoldo Venegas-Quiñones (25110198) Pablo A. Garcia-Chevesich (19522990) Madeleine Guillen (25110201) Edgard González (25110204) Javier Ticona (25110207) José Díaz (486109) Julia Zea (14910894) Francisco Alejo (25110210) John McCray (25110213) Medicine Environmental Sciences not elsewhere classified Sociology Cancer Computational Biology groundwater governance unregistered extraction sustainable groundwater management census-based water demand estimation aquifer depletion water rights administration domestic wells water security <p>Sustainable groundwater governance requires accurate extraction accounting, yet unregistered domestic wells create persistent blind spots worldwide. Chile exemplifies this challenge: its 1981 Water Code established market-oriented water rights while exempting domestic wells from registration. This study develops an integrated framework quantifying discrepancies between registered entitlements and unregistered household extraction by combining spatially audited national water rights records with geocoded census microdata (2017, 2024), alongside piezometric analysis from 474 monitoring wells.</p> <p>Results revealed approximately 200 000 unregistered extraction points, indicating that approximately 76% of domestic groundwater withdrawal occurs outside formal visibility. Well dependence increased 12.3% between census periods despite network expansion. After climate correction, 86.7% of monitored wells exhibited declining trends significantly correlated with discrepancy metrics. Ensemble projections indicate high-discrepancy alluvial systems face potential exhaustion by 2030. This census-registry integration offers replicable methodology for bridging administrative records with physical aquifer conditions, supporting SDG 6 monitoring across regions with substantial unregistered groundwater use.</p> 2026-09-25T13:20:41Z Dataset Dataset 10.6084/m9.figshare.33995340.v1 https://figshare.com/articles/dataset/Quantifying_unregistered_groundwater_via_census-registry_integration_for_Chile/33995340 CC BY 4.0