Supplementary data for "Preparing for the Next Drought: Delineating Safe Groundwater Reserves in Post‑Subsidence Cities"

This repository contains the supplementary datasets supporting the manuscript entitled "Preparing for the Next Drought: Delineating Safe Groundwater Reserves in Post‑Subsidence Cities", which is currently under review for publication in Nature Urban Sustainability. The study develops a hydro‑geomechanical framework (IVHG–NPCH–SPB–SPV) to define subsidence‑proof pumping limits for post‑subsidence Tianjin, North China Plain. The framework quantifies the intrinsic vertical hydraulic gradient (IVHG), maps the new pre‑consolidation head (NPCH) and safe pumping buffer (SPB), and derives zone‑specific and city‑scale safe pumping volumes (SPVs) for drought contingency planning. Repository contents: Well_data.zip – Hydraulic head time series recorded at all monitoring wells used in this study GNSS_data.zip – GNSS‑derived subsidence time series InSAR_data.zip – InSAR‑derived subsidence time series at 1‑km grids Zone_kml.zip – KML files for the 10 management zones defined by this study, including city and district boundary files Figures.zip – All figures and related files Supplementary_Data1.xls – NPCH and SPB values at 168 well sites Supplementary_Data2.xls – Key parameters for estimating zone‑specific SPVs