Data for: Measuring Streambank Erosion: A Comparison of Erosion Pins, Total Station, and Terrestrial Laser Scanner

This is data for the manuscript "Measuring Streambank Erosion: A Comparison of Erosion Pins, Total Station, and Terrestrial Laser Scanner" by Dan Myers ([e-mail]), Dr. Rick Rediske, and Dr. Jim McNair of the Annis Water Resources Institute (Muskegon, MI, USA). The abstract is included below:

Streambank erosion is important to watershed managers because it can be the dominant entry pathway of sediment to streams and also damages aquatic habitat for fish and invertebrates, riparian areas, and infrastructure. Bank erosion is difficult to measure and quantify and both models and field methods are needed to assess the significance of this important source. Our objectives were to 1) evaluate and compare three techniques for quantifying sediment pollution from streambanks: erosion pins, total station surveyor, and laser scanning, 2) spatially assess streambank erosion rates in the Indian Mill Creek watershed of Michigan, USA, and 3) relate streambank erosion results with a modeling study of nonpoint source pollution in the Indian Mill Creek watershed. We were unable to detect significant differences between measurement techniques. Total station and laser scanner data were correlated, but neither erosion pins and total station nor erosion pins and laser scanner were correlated. The terrestrial laser scanner collected high resolution data on barren streambanks with a clear line of sight, but the coarser erosion pin or total station techniques are preferable for vegetated banks because of better coverage. We estimate that streambank erosion contributes 2,020 Mg yr-1 of sediment to Indian Mill Creek, which is 28.5% of the total sediment load. This research is important for watershed managers addressing the sources of fish and macroinvertebrate community impairments in Indian Mill Creek and other watersheds that are degraded by excessive sediment.

本数据集对应由美国密歇根州马斯基根安尼斯水资源研究所的Dan Myers（邮箱：[e-mail]）、Rick Rediske博士与Jim McNair博士共同撰写的学术论文《Measuring Streambank Erosion: A Comparison of Erosion Pins, Total Station, and Terrestrial Laser Scanner》。以下为该论文的摘要：
河岸侵蚀对流域管理者而言至关重要，其既是沉积物输入溪流的主要途径，同时也会破坏鱼类、无脊椎动物的水生栖息地、河岸带区域与基础设施。河岸侵蚀的量化与测量难度较高，因此需结合模型与野外方法，以评估这一重要污染源的影响程度。本研究的目标包含三点：1）评估并对比三种用于量化河岸侵蚀所致沉积物污染的技术：侵蚀针（erosion pins）、全站仪（total station）与地面激光扫描仪（terrestrial laser scanner）；2）对美国密歇根州印第安米尔溪流域的河岸侵蚀速率开展空间评估；3）将河岸侵蚀的研究结果与印第安米尔溪流域的非点源污染（nonpoint source pollution）建模研究相结合。
本研究未检测到不同测量技术间存在显著差异。全站仪与地面激光扫描仪的数据呈现显著相关性，但侵蚀针分别与全站仪、侵蚀针与地面激光扫描仪的数据均无相关性。地面激光扫描仪可在视线通畅的裸露河岸采集高分辨率数据，但针对植被覆盖的河岸，侵蚀针或全站仪技术因覆盖效果更佳，更为适用。
经估算，河岸侵蚀每年向印第安米尔溪输入2020 Mg的沉积物，占该溪流总沉积物负荷的28.5%。本研究对于致力于解决印第安米尔溪及其他因过量沉积物导致生态退化的流域中鱼类与大型无脊椎动物群落受损问题的流域管理者而言，具有重要的参考价值。