Objective The coupling coordination relationship, spatiotemporal characteristics and influencing factors between digital new quality productivity and water resource utilization efficiency were explored, in order to provide a scientific basis for promoting the synergistic development of the digital economy and high-efficience water resource utilization. Methods Using panel data of prefecture-level cities in Jiangxi Province from 2011 to 2022, the evaluation index system was constructed for digital new quality productivity and water resource utilization efficiency. The Super-SBM model, kernel density estimation, and geographical detector methods were employed to analyze the spatiotemporal characteristics of their coupling coordination degree and its driving factors. Results ① The level of digital new quality productivity in Jiangxi Province exhibited a year-by-year increasing trend, with significant disparities among the cities. Water resource utilization efficiency demonstrated a relatively stable “W”-shaped trend, namely, initially declining, then rising, declining again, and rising once more, resulting in an overall decline in efficiency. ② The coupling coordination degree showed a year-by-year increasing trend, with most cities transitioning from disorder to coordination. Spatially, it presented a distribution pattern characterized by large contiguous areas with small, scattered patches. The degree of coupling coordination is projected to increase in the future, with most cities expected to transition from primary to good coordination by 2027. ③ The primary driving factors of coupling coordination included effective agricultural irrigation area, topography, urbanization rate, and water resource endowment. The interaction effects between these factors manifested primarily as two-factor and nonlinear enhancements. Conclusion The level of coordinated development between digital new quality productivity and water resource utilization efficiency in Jiangxi Province was relatively low, with significant disparities among cities. Formulating regionally differentiated development strategies and optimizing policy support systems for multi-factor synergistic development is essential for achieving balanced progress in digital new quality productivity and water resource utilization.
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