Supporting Data for a Numerical Investigation of the Implications of Altered Channel-Floodplain Connectivity on Hydrodynamic Flood Wave Processes
Supporting Data for a Numerical Investigation of the Implications of Altered Channel-Floodplain Connectivity on Hydrodynamic Flood Wave Processes
复制标题
改变河道-漫滩连通性对水动力洪水波过程影响的数值研究的支持数据
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
C. Byrne
中科院分区：
文献类型：
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作者：
C. Byrne
随着发达国家河流的严重变化，水动力过程和泛滥平原的连通性发生了巨大变化。本文的研究集中在两个水动力过程的定量化：洪水波衰减和河道-滩地通量。这三个研究章节的目的是：(1)评估洪水波衰减的生态系统服务如何随着河流工程实践的实施以及当代河流恢复工作的实施而变化；(2)描述洪水波衰减对当代和变化的条件的敏感性；以及(3)通过横向通量度量表征河道-泛滥平原的连通性。所有章节的目标都是利用在美国新墨西哥州格兰德河进行的高分辨率二维水动力建模技术实现的。模型是为历史、修复前、当代和变化的条件而创建的。第一章的结果表明，历史条件比当代条件提供了更多的衰减。突然蓄水会造成衰减，并改变洪水的波形。第二章的结果表明，衰减对总的水流面积和可供蓄水的面积最为敏感，同时也显示了地形和粗糙度变化过程的差异。第三章通量结果显示，由于人为影响，质量通量和动量通量不同，嵌入的泛滥平原特征类型提供了更大和更不均匀的横向连通性。这里给出的结果是
With severely altered rivers throughout the developed world, hydrodynamic processes and floodplain connectivity have changed drastically. The research presented here focuses on quantification of two hydrodynamic processes: flood wave attenuation and channel-floodplain fluxes. Objectives of the three research chapters were to (1) evaluate how the ecosystem service of flood wave attenuation has changed with the implementation of river engineering practices as well as contemporary river restoration efforts, (2) describe the sensitivities of flood wave attenuation to contemporary and altered conditions, and (3) characterize channel-floodplain connectivity through lateral flux metrics. All chapter objectives were met using high-resolution, two-dimensional hydrodynamic modeling techniques conducted on the Rio Grande, New Mexico, USA. Models were created for historical, pre-restoration, contemporary, and altered conditions. Chapter 1 results indicate that historical conditions provided more attenuation than contemporary conditions. Sudden storage of water creates attenuation and alters flood wave shape. Chapter 2 results suggest that attenuation is most sensitive to total area for flow and area available for water storage while also displaying differences in process between topographic and roughness alterations. Chapter 3 flux results show differences in mass and momentum flux due to anthropogenic impacts and inset floodplain feature types provide greater and more heterogeneous lateral connectivity. Results presented here have