Degradation of floodplain integrity within the contiguous United States

Degradation of floodplain integrity within the contiguous United States
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美国本土洪泛区完整性退化

DOI:
10.1038/s43247-023-00877-4
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发表时间:
2023
影响因子:
7.9
通讯作者:
Carver, Dan
Carver, Dan
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Morrison, Ryan R.;Simonson, Kira;McManamay, Ryan A.;Carver, Dan

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尽管洪泛平原景观产生了许多水文、地质和生态效益,但人类活动继续以比其他景观类型更高的速度退化泛滥平原。这种大规模的景观改变得到了广泛的认可,但以前还没有评估过量化人类活动对这种退化负有责任的程度的全面的国家数据集。在这项研究中,我们通过在空间上量化人为应激源对近80,000个泛滥平原单元的影响来分析毗邻的美国泛滥平原的完整性。我们通过广泛可用的地理空间数据集展示了人类修改的普遍性,我们使用这些数据集来量化洪水衰减、地下水储存、栖息地提供、泥沙调节以及有机物和溶质调节这五个基本泛滥平原功能的泛滥平原完整性指标。我们的结果表明,泛滥平原退化在空间上是不同的,美国近70%的泛滥平原的完整性很差。我们强调,量化空间上明确的洪泛区要素的完整性可以使恢复工作针对最迫切需要保护的地区。
Despite the numerous hydrological, geological, and ecological benefits produced by floodplain landscapes, floodplains continue to be degraded by human activities at a much higher rate than other landscape types. This large-scale landscape modification has been widely recognized, yet a comprehensive, national dataset quantifying the degree to which human activities are responsible for this degradation has not previously been evaluated. In this research, we analyze floodplain integrity for the contiguous United States by spatially quantifying the impact of anthropogenic stressors on almost 80,000 floodplain units. We demonstrate the prevalence of human modifications through widely available geospatial datasets, which we use to quantify indicators of floodplain integrity for five essential floodplain functions of flood attenuation, groundwater storage, habitat provision, sediment regulation, and organics and solute regulation. Our results show that floodplain degradation is spatially heterogeneous and that the integrity of nearly 70% of floodplains in the United States is poor. We highlight that quantifying the integrity of spatially explicit floodplain elements can allow for restoration efforts to be targeted to the areas in most desperate need of preservation.
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