Quantifying river incision into low‐relief surfaces using local and catchment‐wide        <sup xmlns='http://www.wiley.com/namespaces/wiley'>1010        Be denudation rates

Wolff Reinhard; Hetzel Ralf; Strobl Marcus

摘要

Abstract > Relief generation in non‐glaciated regions is largely controlled by river incision into bedrock but datable fluvial terraces that allow quantifying incision rates are not always present. Here we suggest a new method to determine river incision rates in regions where low‐relief surfaces are dissected by streams. The approach consists of three steps and requires the 10 Be concentrations of a stream sediment sample and a regolith sample from the low‐relief surface. In the first step, the spatial distribution of 10 Be surface concentrations in the given catchment is modelled by assuming that denudation rates are controlled by the local hillslope angles. The slope–denudation rate relation for this catchment is then quantified by adjusting the relation between slope angle and denudation rate until the average 10 Be concentration in the model is equal to the one measured in the stream sediment sample. In the second step, curved swath profiles are used to measure hillslope angles adjacent to the main river channel. Third, the mean slope angle derived from these swath profiles and the slope–denudation relation are used to quantify the river incision rate (assuming that the incision rate equals the denudation rate on adjacent hillslopes). We apply our approach to two study areas in southern Tibet and central Europe (Black Forest). In both regions, local 10 Be denudation rates on flat parts of the incised low‐relief surface are lower than catchment‐wide denudation rates. As the latter integrate across the entire landscape, river incision rates must exceed these spatially averaged denudation rates. Our approach yields river incision rates between ~15 and ~30?m/Ma for the Tibetan study area and incision rates of ~7 </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”> <标题类型=“main”>抽象</ title> >浮雕生成在非漫游区域主要由河切口控制到基岩，但是允许量化切口速率的可持续河梯度并不总是存在。在这里，我们建议一种新的方法来确定河流切口速率，其中河流解剖到低浮雕表面。该方法由三个步骤组成，需要 10 </ sup>是流沉积物样品的浓度和来自低浮雕表面的极锂样品。在第一步中，通过假设通过当地山坡角度控制剥蚀速率来建模给定集水区中的 10 </ sup>是表面浓度的空间分布。然后通过调节倾斜角度和剥落速率之间的关系，直到模型中的平均 10 </ sup>浓度等于流沉积物样品中测量的该流域之间的关系来量化该集水器之间的斜率关系。在第二步中，弯曲的条形轮廓用于测量与主河道相邻的山坡角度。第三，使用来自这些条带简档的平均倾斜角和斜坡剥离关系来量化河道切口速率（假设切口速率等于相邻山坡上的剥落速率）。我们将我们的方法应用于西藏南部和中欧（黑森林）的两个学习区。在两个区域中，本地 10 </ sup>在切割的低浮雕表面的平坦部分的剥削速率低于集距离剥削速率。随着后者整合在整个景观中，河道切口率必须超过这些空间平均剥削速率。我们的方法在藏族研究区和切口率为〜7的河南切口率〜15〜30？m / ma之间 </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11期</span><b style="margin: 0 2px;">|</b><span>共15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=Wolff Reinhard&option=202" target="_blank" rel="nofollow">Wolff Reinhard;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Hetzel Ralf&option=202" target="_blank" rel="nofollow">Hetzel Ralf;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Strobl Marcus&option=202" target="_blank" rel="nofollow">Strobl Marcus;</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>Institut für Geologie und Pal?ontologieWestf?lische Wilhelms‐Universit?t MünsterCorrensstr. 24 D‐48149 Münster Germany;</p> <p>Institut für Geologie und Pal?ontologieWestf?lische Wilhelms‐Universit?t MünsterCorrensstr. 24 D‐48149 Münster Germany;</p> <p>Institut für Geologie und Pal?ontologieWestf?lische Wilhelms‐Universit?t MünsterCorrensstr. 24 D‐48149 Münster Germany;</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=river incision&option=203" rel="nofollow">river incision;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=low‐relief surface&option=203" rel="nofollow">low‐relief surface;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=cosmogenic 10 Be&option=203" rel="nofollow">cosmogenic 10 Be;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Tibet&option=203" rel="nofollow">Tibet;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=geomorphology&option=203" rel="nofollow">geomorphology;</a> </p> <div class="translation"> 机译：河切口;低浮雕表面;宇宙原性10是;西藏;地貌;地貌; 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Quantifying river incision into low‐relief surfaces using local and catchment‐wide 1010 Be denudation rates

摘要

Quantifying river incision into low‐relief surfaces using local and catchment‐wide ^{1010 Be denudation rates}