Defining Dunes: Evaluating How Dune Feature Definitions Affect Dune Interpretations from Remote Sensing
Defining Dunes: Evaluating How Dune Feature Definitions Affect Dune Interpretations from Remote Sensing
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DOI：
10.2112/jcoastres-d-17-00082.1
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发表时间：
2018-01
影响因子：
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通讯作者：
P. Wernette;S. Thompson;R. Eyler;Hannah Taylor;C. Taube;A. Medlin;Claire Decuir;C. Houser
中科院分区：
文献类型：
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作者：
P. Wernette;S. Thompson;R. Eyler;Hannah Taylor;C. Taube;A. Medlin;Claire Decuir;C. Houser
摘要韦内特，P.；汤普森，S.；艾勒，R.；泰勒，H.；陶布，C.；梅德林，A.； Decuir, C. 和 Houser, C.，2018。定义沙丘：评估沙丘特征定义如何影响遥感沙丘解释。海岸弹性是海滩-沙丘系统在风暴后恢复到之前状态的能力，这种弹性受到风暴前海滩和沙丘形态以及风暴气候（即风暴频率和强度）的影响。激光雷达和运动结构等遥感技术的改进使得能够快速收集和生成用于评估风暴影响和恢复的数字高程模型。尽管快速的风暴后评估需要采用一致的方法来提取沙丘形态，但相对较少的注意力集中在定义沙丘的不同部分上。本文的目标是研究沙丘特征的定义如何驱动用于提取沙丘的方法并综合沙丘特征的全面定义。对提取海滩和沙丘形态的现有方法的分析表明，海滩-沙丘过渡（即沙丘趾）的定义方式存在很大差异。许多定义是递归的或包含不明确的术语，导致沙丘脚趾或脊线位置取决于用户对定义的解释。其他定义在很大程度上依赖于用户在特征提取过程的不同阶段对沙丘特征的解释。对视觉解释的依赖可能会导致不同解释者得出截然不同的特征位置。考虑到不同定义对沙丘弹性评估的影响以及沙丘特征定位的法律含义，本研究提出了一系列沙丘特征的语义模型。海岸形态的语义建模对于一致、准确地评估海岸恢复并根据一套一致的标准预测未来的海岸评估至关重要。
ABSTRACT Wernette, P.; Thompson, S.; Eyler, R.; Taylor, H.; Taube, C.; Medlin, A.; Decuir, C., and Houser, C., 2018. Defining dunes: Evaluating how dune feature definitions affect dune interpretations from remote sensing. Coastal resiliency is the ability of a beach–dune system to recover to a previous state after a storm, and this resiliency is affected by prestorm beach and dune morphology and storm climate (i.e. storm frequency and intensity). Improvements in remote sensing technology such as LIDAR and structure from motion have enabled rapid collection and production of digital elevation models used to assess storm impact and recovery. Although rapid poststorm assessment requires a consistent approach for extracting dune morphology, relatively little attention has focused on defining the different parts of a dune. The goals of this paper are to examine how the definition of a dune feature drives the methodology used to extract dunes and to synthesize a comprehensive definition of dune features. An analysis of existing approaches for extracting beach and dune morphology demonstrates that there is considerable variation in how the beach–dune transition (i.e. dune toe) is defined. Many definitions are recursive or include ambiguous terminology, resulting in a dune toe or crest line position dependent on user interpretation of the definition. Other definitions rely heavily on user interpretation of dune features at varying stages in the feature extraction process. Reliance on visual interpretation can result in substantially different feature locations across different interpreters. Given the impact of varying definitions on dune resiliency assessments and legal implications for dune features location, this study proposes a series of semantic models for dune features. Semantic modelling of coastal morphology is vital for consistently and accurately assessing coastal recovery and predicting future coastal assessments on the basis of a consistent set of criteria.