Microtopography of bare peat: a conceptual model and objective classification from high‐resolution topographic survey data

Smith M.W.; Warburton J.

摘要

Abstract > Peatlands globally are at risk of degradation through increased susceptibility to erosion as a result of climate change. Quantification of peat erosion and an understanding of the processes responsible for their degradation is required if eroded peatlands are to be protected and restored. Owing to the unique material properties of peat, fine‐scale microtopographic expressions of surface processes are especially pronounced and present a potentially rich source of geomorphological information, providing valuable insights into the stability and dominant surface process regimes. We present a new process‐form conceptual framework to rigorously describe bare peat microtopography and use Structure‐from‐Motion (SfM) surveys to quantify roughness for different peat surfaces. Through the first geomorphological application of a survey‐grade structured‐light hand‐held 3D imager (HhI), which can represent sub‐millimetre topographic variability in field conditions, we demonstrate that SfM identifies roughness signatures reliably over bare peat plots (1?m 2 ), although some smoothing is observed. Across 55 plots, the roughness of microtopographic types is quantified using a suite of roughness metrics and an objective classification system derived from decision tree analysis with 98% success. This objective classification requires just five roughness metrics, each of which quantifies a different aspect of the surface morphology. We show that through a combination of roughness metrics, microtopographic types can be identified objectively from high resolution survey data, providing a much‐needed geomorphological process‐perspective to observations of eroded peat volumes and earth surface change. Copyright ? 2018 John Wiley & Sons, Ltd. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><abstract xmlns =“http://www.wiley.com/namespaces/wiley”type =“main”xml：lang =“en”> <title type =“main”>抽象</ title> >泥炭地全球泥炭地由于气候变化，通过增加对侵蚀的易感性来降解的风险。如果要保护并恢复侵蚀的泥炭块，则需要泥炭侵蚀和对负责劣化的过程的理解。由于泥炭的独特物质性质，表面过程的细微微波表达尤其明显，并且具有潜在丰富的地貌信息来源，为稳定性和主要的表面处理制度提供有价值的见解。我们提出了一种新的过程形式概念框架，以严格描述裸泥微波术，并使用结构 - 从运动（SFM）调节，以量化不同泥炭表面的粗糙度。通过测量级结构灯手持式3D成像仪（HHI）的第一地形施加，其可以代表现场条件下的亚毫米地形变异性，我们证明SFM在裸泥地图上可靠地识别粗糙度签名（＆ 1虽然观察到一些平滑，但是观察到一些平滑的m 2 </ sup>。在55个绘图中，使用粗糙度度量套件和目标分类系统量化了微拷贝类型的粗糙度，并从决策树分析中获得了98％的成功。该目标分类只需要五个粗糙度度量，每种粗糙度测量都量化了表面形态的不同方面。我们表明，通过组合粗糙度指标，可以客观地从高分辨率测量数据识别微选曲类型，为观察侵蚀的泥炭体积和地面表面变化提供了急需的地貌过程视角。版权？ 2018年John Wiley＆amp; SONS，LTD。</ p> </ abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-22319/'>《Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group》</a> <b style="margin: 0 2px;">|</b><span>2018年第8期</span><b style="margin: 0 2px;">|</b><span>共18页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Smith M.W.&option=202" target="_blank" rel="nofollow">Smith M.W.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Warburton J.&option=202" target="_blank" rel="nofollow">Warburton J.;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>School of GeographyUniversity of LeedsWoodhouse Lane Leeds LS2 9JT UK;</p> <p>Department of GeographyDurham UniversityLower Mountjoy South Road Durham DH1 3LE UK;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/163.html" title="地球物理学">地球物理学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=peat&option=203" rel="nofollow">peat;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=microtopography&option=203" rel="nofollow">microtopography;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Structure‐from‐Motion&option=203" rel="nofollow">Structure‐from‐Motion;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=structured‐light imager&option=203" rel="nofollow">structured‐light imager;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=roughness&option=203" rel="nofollow">roughness;</a> </p> <div class="translation"> 机译：泥炭;微拷贝;结构 - 从运动;结构灯成像仪;粗糙度; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> 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