Ephemeral Stream Network Extraction from Lidar‐Derived Elevation and Topographic Attributes in Urban and Forested Landscapes
Ephemeral Stream Network Extraction from Lidar‐Derived Elevation and Topographic Attributes in Urban and Forested Landscapes
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从城市和森林景观中激光雷达导出的高程和地形属性中提取短暂流网络
DOI：
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
K. Hopkins
中科院分区：
文献类型：
--
作者：
M. Metes;Daniel K. Jones;M. Baker;A. Miller;D. Hogan;J. V. Loperfido;K. Hopkins
数字河流网络中水源渠道的代表性不足可能会导致水源栖息地丧失、河流埋藏和流域功能程度的不确定性。高分辨率（<2米）高程数据可用性的提高使得源头水道的描绘变得更加容易。在这项研究中，利用光探测和测距获得的海拔数据来预测美国马里兰州皮埃蒙特森林和城市流域的短暂河流网络。开发了一种使用地形开放度（TO）和湿度指数来远程预测河流网络范围的方法。将预测的网络与每个流域的临时网络的全面现场调查进行比较，以评估性能。还与美国地质调查局国家水文学数据集 (NHD) 和流量累积方法进行了比较，其中单个流域面积阈值定义了渠道的启动。尽管 NHD 和流量累积方法导致佣金误差较低，但这些网络中的遗漏误差最高。基于 TO 的网络检测到大量的临时通道，但佣金错误较高。在所有方法中都很难检测到河岸不明确或源自地下水渗漏的小型短暂渠道。森林流域和城市流域之间的比较也凸显了利用人类改造景观中的地形属性来识别水源渠道的困难。
Under‐representations of headwater channels in digital stream networks can result in uncertainty in the magnitude of headwater habitat loss, stream burial, and watershed function. Increased availability of high‐resolution (<2 m) elevation data makes the delineation of headwater channels more attainable. In this study, elevation data derived from light detection and ranging was used to predict ephemeral stream networks across a forested and urban watershed in the Maryland Piedmont USA. A method was developed using topographic openness (TO) and wetness index to remotely predict the extent of stream networks. Predicted networks were compared against a comprehensive field survey of the ephemeral network in each watershed to evaluate performance. Comparisons were also made to the U.S. Geological Survey National Hydrography Dataset (NHD) and a flow accumulation approach where a single drainage area threshold defined channel initiation. Although the NHD and flow accumulation methods resulted in low commission errors, omission errors were highest in these networks. The TO‐based networks detected a larger number of ephemeral channels, but with higher commission error. Small ephemeral channels with less defined banks or originating at groundwater seeps were difficult to detect in all methods. Comparisons between forested and urban watersheds also highlight the difficulty of identifying headwater channels using topographic attributes in human‐modified landscapes.
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DOI：
10.1002/wat2.1504
发表时间：
2021-02
期刊：
Wiley Interdisciplinary Reviews: Water
影响因子：
--
作者：
M. Shanafield;Sarah A. Bourke;M. Zimmer;K. Costigan
通讯作者：
M. Shanafield;Sarah A. Bourke;M. Zimmer;K. Costigan
影响因子：
4.7
作者：
Ward, Adam S.;Schmadel, Noah M.;Wondzell, Steven M.
通讯作者：
Wondzell, Steven M.
影响因子：
3.2
作者：
Jensen, Carrie K.;McGuire, Kevin J.;Prince, Philip S.
通讯作者：
Prince, Philip S.
影响因子：
3.4
作者：
Clubb, Fiona J.;Mudd, Simon M.;Limaye, Ajay B.
通讯作者：
Limaye, Ajay B.