该研究团队绘制了1984-2018年约290万条河流的日流量图，以评估全球河流系统的近期变化。
课题组人员发现，河流出口以流量显著减少为主，而上游流量显著增加的可能性是流量显著减少的1.7倍。这些变化导致大约29%的全球陆表经历显著的径流上游转移。
研究发现，最小河流的变化最大：侵蚀潜力增加（河流功率增加约5%），洪水频率增加（百年一见的洪水增加约42%），以及可能的营养动态（季节性流态改变）。
研究通过绘制数百万条河流的地图，从“细节尺度”揭示了详细的变化。研究结果强调，广泛采用这种方法可以揭示水圈的其他变化。
附：英文原文
Title: More flow upstream and less flow downstream: The changing form and function of global rivers
Author: Dongmei Feng, Colin J. Gleason
Issue&Volume: 2024-12-13
Abstract: We mapped daily streamflow from 1984 to 2018 in approximately 2.9 million rivers to assess recent changes to global river systems. We found that river outlets were dominated by significant decreases in flow, whereas headwaters were 1.7 times more likely to have significantly increased flow than decreased. These changes result in a significant upstream shift in streamflow experienced by about 29% of the global land surface. We found the most changes in the smallest steams in our study: increases in erosion potential (approximately 5% increase in stream power), flood frequency (approximately 42% increase in 100-year floods), and likely nutrient dynamics (altered seasonal flow regimes). We revealed these changes using “detail at scale” by mapping millions of individual rivers. Widely adopting this approach could reveal other changes to the hydrosphere.
DOI: adl5728
Source:https://www.science.org/doi/10.1126/science.adl5728