| Analysis of spatiotemporal evolution characteristics and driving forces of water footprint in inland river basins of Gansu Province |
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| DOI：10.7606/j.issn.1000-7601.2025.04.23 |
| Key Words: water footprint temporal and spatial distribution center of gravity transfer driving force inland river basin of Gansu Province |
| Author Name | Affiliation | | LI Xiaopeng | College of Agriculture and Forestry Economics and Management, Lanzhou University of Finance and Economics, Lanzhou, Gansu 730020, China | | LI Yupeng | College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China | | LI Yuannong | College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China | | LI Tong | College of Agriculture and Forestry Economics and Management, Lanzhou University of Finance and Economics, Lanzhou, Gansu 730020, China |
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| Abstract: |
| The inland river basins of Gansu Province are important ecological security barriers for the northwest and even the whole country. It is crucial for the sustainable utilization of water resources in this region so as to evaluate the water resource utilization status and explore the contradiction between water resource utilization and economic development. The water footprint method was applied to calculate the water footprint of inland river basins of Gansu Province from 2009 to 2023. The level of water resource pressure was evaluated. The main driving factors of water footprint changes were quantitatively analyzed using the IPAT-LMDI model. The results showed that the total water footprint of the watershed showed an overall upward trend from 2009 to 2023, with an average annual volume of 9.791 billion cubic meters and an average annual increase of 416 million cubic meters. Among them, agricultural water footprint, ecological water footprint, domestic water footprint, urban public water footprint, and export water footprint all showed an upward trend, while industrial water footprint and import water footprint showed a downward trend. The average annual agricultural water footprint was 7.863 billion cubic meters, accounting for the highest proportion (80.31%) among all types of water footprints, showing a fluctuating upward trend. But the overall intensity of agricultural water footprint showed a significant downward trend. In the past 15 years, in terms of agricultural water footprint, the grain water footprint was 3.545 billion cubic meters, accounting for the largest proportion (45.09%). The water resources in the inland river basins of Gansu Province were facing significant usage pressure. The per capita water footprint was higher than the national average and showed an upward trend annually. The water footprint pressure index (1.20) was relatively high, while the overall economic benefits of water resources (annual average was 32.08 CNY·m-3) were relatively low. The center of gravity of water footprint and agricultural water footprint had shifted to the northwest by 20.41 km and 15.23 km, respectively. The trajectory of the center of gravity had always been within Shandan County and Minle County, without significant structural changes. Among the driving factors of water footprint change in the inland river basin of Gansu Province, the economic factor had a significant driving effect, with a high contribution value from economic effects (mean of 32.168 billion cubic meters), while technological and population effects exhibited inhibitory roles (mean of -1.395 billion cubic meters and -2.680 billion cubic meters, respectively). |
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