Distribution of erosion intensity in the Jingjiang reach influenced by the Three Gorges Dam

机译：三峡大坝京江侵蚀强度分布

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Abstract > Elucidation of the fluvial processes influenced by dams provides better understanding of river protection and basin management. However, less attention has been given to the erosion intensity distribution of riverbeds and its association with channel morphology and hydrological conditions. Based on hydrological and topographic data, the spatial and temporal distributions of erosion intensity (2002–2014) influenced by the Three Gorges Dam (TGD) were analyzed for the Jingjiang reach of the Yangtze River. The mechanisms underlying the distribution of erosion intensity in response to hydrological conditions were investigated. The results are as follows: (1) The erosion intensities of different discharges were not uniform, and moderate flow (10 000–27 000?m 3 /s) produced the largest erosion magnitude among all flow ranges. Owing to the hydrological changes caused by flood reduction and prolongation of moderate flow duration after the TGD began operating, up to 70% of the erosion amount was caused by moderate flows. (2) The lateral distribution of erosion intensity was extremely uneven, as the proportion of cumulative erosion of the low‐flow channel within the bankfull channel reached 88% in 2013. This caused the channel to become narrower and deeper. (3) The longitudinal distribution of erosion intensity was inhomogeneous. The erosion intensity in the wide reaches was greater than that in the narrow reaches, leading to smaller differences in channel morphology along the river. (4) Changes in hydrological conditions influenced by the TGD, significant reduction of sediment concentration along with flood abatement, and increased duration of moderate flow discharges were the main factors affecting erosion distribution in the post‐dam period. Our conclusions can be applied to the Yangtze River as a </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> >阐明受水坝影响的河流过程可以更好地了解河流保护和盆地管理。然而，已经对河床的侵蚀强度分布及其与信道形态和水文条件相关的关注较少。基于水文和地形数据，分析了由三峡大坝（TGD）影响的侵蚀强度（2002-2014）的空间和时间分布于长江景江。研究了响应水文条件的侵蚀强度分布的机制。结果如下：（1）不同放电的侵蚀强度并不均匀，并且中等流动（10 000-27 000？m 3 </ sup> / s）在所有流程范围内产生最大的腐蚀幅度。由于在TGD开始运行后的洪水降低和中等流动持续时间延长的水文变化，高达70％的侵蚀量是由中度流动引起的。（2）侵蚀强度的横向分布极为不均匀，因为2013年银行渠道内的低流量通道的累积腐蚀比例达到了88％。这导致通道变得较窄和更深。（3）腐蚀强度的纵向分布不均匀。宽距离的侵蚀强度大于狭窄到达的强度，导致沿河沿河的通道形态差异较小。（4）受TGD影响的水文条件的变化，沉积物浓度的显着降低以及洪水减少，中等流量排放的增加是影响后坝后时期腐蚀分布的主要因素。我们的结论可以应用于长江作为一个 </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12期</span><b style="margin: 0 2px;">|</b><span>共12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=Han Jianqiao&option=202" target="_blank" rel="nofollow">Han Jianqiao;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Sun Zhaohua&option=202" target="_blank" rel="nofollow">Sun Zhaohua;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Li Yitian&option=202" target="_blank" rel="nofollow">Li Yitian;</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>Institute of Soil and Water ConservationNorthwest A&</p> <p>F University Yangling Shaanxi P. R. China;</p> <p>State Key Laboratory of Water Resources and Hydropower Engineering ScienceWuhan University Wuhan Hubei P. R. China;</p> <p>State Key Laboratory of Water Resources and Hydropower Engineering ScienceWuhan University Wuhan Hubei P. R. China;</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=Three Gorges Dam&option=203" rel="nofollow">Three Gorges Dam;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Yangtze River&option=203" rel="nofollow">Yangtze River;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=erosion intensity&option=203" rel="nofollow">erosion intensity;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=dam impacts&option=203" rel="nofollow">dam impacts;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=fluvial process&option=203" rel="nofollow">fluvial process;</a> </p> <div class="translation"> 机译：三峡大坝;长江;侵蚀强度;水坝影响;河流过程; </div> </li> <li> <span class="lefttit">入库时间</span> <span>2022-08-20 02:29:57</span> </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> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704023138974.html">Distribution of erosion intensity in the 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