Revisiting lake sediment budgets: How the calculation of lake lifetime is strongly data and method dependent

Lemma Hanibal; Admasu Teshager; Dessie Mekete; Fentie Derbew; Deckers Jozef; Frankl Amaury; Poesen Jean; Adgo Enyew; Nyssen Jan

摘要

Abstract > Lake sedimentation has a fundamental impact on lake lifetime. In this paper, we show how sensitive calculation of the latter is to the quality of data available and assumptions made during analysis. Based on the collection of a large new dataset, we quantify the sediment masses (1) mobilized on the hillslopes draining towards Lake Tana (Ethiopia), (2) stored in the floodplains, (3) transported into the lake, (4) deposited in the lake and (5) delivered out from the lake so as to establish a sediment budget. In 2012–2013, suspended sediment concentration (SSC) and discharge measurements were made at 13 monitoring stations, including two lake outlets. Altogether, 4635 SSC samples were collected and sediment rating curves that account for land cover conditions and rainfall seasonality were established for the 11 river stations, and mean monthly SSC was calculated for the outlets. Effects of the floodplain on rivers' sediment yield (SY) were investigated using measurements at both sides of the floodplains. SY from ungauged rivers was assessed using a model that includes catchment area and rainfall, whereas bedload and direct sediment input from lake shores were estimated. As a result, the gross annual SY was <fi>c.</fi> 39.55 (± 0.15) Mt, dominantly from Gilgel Abay and Gumara Rivers. The 2.57 (± 0.17) Mt sediment deposited in floodplains indicate that the floodplains serve as an important sediment sink. Moreover, annually <fi>c.</fi> 1.09 Mt of sediment leaves the lake through the two outlets. Annual sediment deposition in the lake was <fi>c.</fi> 36.97 (± 0.22) Mt and organic matter accumulation was 2.15 Mt, with a mean sediment trapping efficiency of 97%. Furthermore, SSC and SY are generally higher at the beginning of the rainy season because soils in cultivated fiel </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> >湖沉降对湖泊的影响根本。在本文中，我们展示了后者的敏感性计算是对可用数据的质量和分析期间的假设。基于一个大型数据集的收集，我们量化沉积物质量（1）在山坡上流动的山坡（埃塞俄比亚），（2）储存在洪水平坦，（3）被运送到湖中，（4）沉积在湖泊和（5）从湖中交付，以建立沉积预算。在2012 - 2013年，悬浮沉积物浓度（SSC）和放电测量是在13个监测站，包括两个湖门网站。共收集4635个SSC样品，并为11河站建立了占地面覆盖条件和降雨季节性的沉积物评级曲线，为网点计算了平均月度SSC。利用洪水两侧的测量研究了洪泛区对河流沉积物产量（SY）的影响。使用包括集水区和降雨的模型评估了来自Ungauged River的SY，而估计来自湖岸的床单和直接沉积物。因此，每年毛额SY是</ FI> 39.55（±0.15）MT，从Gilgel Abay和Gumara Rivers显着。沉积在洪水中的2.57（±0.17）MT沉积物表明洪泛平板作为一个重要的沉积物水槽。此外，每年<fi> c。</ fi> 1.09 mt沉积物通过两个出口离开了湖泊。湖中的年沉积物沉积</ Fi> 36.97（±0.22）Mt和有机物积累为2.15吨，平均沉积物诱捕效率为97％。此外，雨季开始时，SSC和SY通常在雨季开始时，因为耕种的土壤 </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3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=Lemma Hanibal&option=202" target="_blank" rel="nofollow">Lemma Hanibal;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Admasu Teshager&option=202" target="_blank" rel="nofollow">Admasu Teshager;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Dessie Mekete&option=202" target="_blank" rel="nofollow">Dessie Mekete;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Fentie Derbew&option=202" target="_blank" rel="nofollow">Fentie Derbew;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Deckers Jozef&option=202" target="_blank" rel="nofollow">Deckers Jozef;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Frankl Amaury&option=202" target="_blank" rel="nofollow">Frankl Amaury;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Poesen Jean&option=202" target="_blank" rel="nofollow">Poesen Jean;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Adgo Enyew&option=202" target="_blank" rel="nofollow">Adgo Enyew;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Nyssen Jan&option=202" target="_blank" rel="nofollow">Nyssen Jan;</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>Bahir Dar Institute of TechnologyBahir Dar UniversityBahir Dar Ethiopia;</p> <p>Bahir Dar Institute of TechnologyBahir Dar UniversityBahir Dar Ethiopia;</p> <p>Bahir Dar Institute of TechnologyBahir Dar UniversityBahir Dar Ethiopia;</p> <p>College of Agriculture and Environmental SciencesBahir Dar UniversityBahir Dar Ethiopia;</p> <p>Department of Earth and Environmental SciencesKU LeuvenB‐3001 Heverlee Belgium;</p> <p>Department of GeographyGhent UniversityB‐9000 Gent Belgium;</p> <p>Department of Earth and Environmental SciencesKU LeuvenB‐3001 Heverlee Belgium;</p> <p>College of Agriculture and Environmental SciencesBahir Dar UniversityBahir Dar Ethiopia;</p> <p>Department of GeographyGhent UniversityB‐9000 Gent Belgium;</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=suspended sediment concentration&option=203" rel="nofollow">suspended sediment concentration;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=floodplain deposition&option=203" rel="nofollow">floodplain deposition;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=lake sedimentation&option=203" rel="nofollow">lake sedimentation;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=sediment budget&option=203" rel="nofollow">sediment budget;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Lake tana&option=203" rel="nofollow">Lake tana;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Ethiopia&option=203" rel="nofollow">Ethiopia;</a> </p> <div class="translation"> 机译：悬浮沉积物浓度;洪泛区沉积;湖泊沉降;泥沙预算;塔纳湖;埃塞俄比亚; </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> <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" 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href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=阳亚平&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 阳亚平</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=马雪洋&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,马雪洋</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=王林&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,王林</a> <span> <a href="/journal-cn-4955/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 湖泊科学 </a> </span> <span> . 2016</span><span>,第004期</span> </span> </div> </li> <li> <div> <b>5. </b><a class="enjiyixqcontent" href="/academic-journal-cn_detail_thesis/0201295914863.html">淡水湖泊沉积物污染评价方法比较--以北大港水库为例</a> <b>[J]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=祁艳丽&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 祁艳丽</a> <a 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href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=肖琳&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,肖琳</a> <span> <a href="/conference-cn-24885/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 第九次全国环境微生物学术研讨会 </a> <span> <span> . 2006</span> </span> </div> </li> <li> <div> <b>7. </b><a class="enjiyixqcontent" href="/academic-degree-domestic_mphd_thesis/02031620271.html">基于相容数据压缩的LFSR重新播种方法研究</a> <b>[A] </b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=吴孝银&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 吴孝银</a> <span> . 2008</span> </span> </div> </li> </ul> <ul style="display: none;"> <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/patent-detail/061204527347.html">一种河流、湖泊沉积物重金属生态毒性风险的综合评价方法</a> <b>[P]</b> . <span> 中国专利： CN110135714B </span> <span> . 2021.07.13</span> </div> </li> <li> <div> <b>2. </b><a class="enjiyixqcontent" href="/patent-detail/06120113179861.html">一种浅剖快速识别浅水湖泊沉积物污染分层信息方法</a> <b>[P]</b> . <span> 中国专利： CN113218894A </span> <span> . 2021-08-06</span> </div> </li> <li> <div> <b>3. </b><a class="enjiyixqcontent" href="/patent-detail/06130453200523.html">METHOD AND DEVICE FOR IMPROVING BOTTOM SEDIMENT OF DAM LAKE, LAKE, AND HARBOR</a> <b>[P]</b> . <span> 外国专利：  JPH11131437A </span> <span> . 1999-05-18</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：改善大湖，湖泊和港口底部沉淀的方法和装置 </span> </p> </li> <li> <div> <b>4. </b><a class="enjiyixqcontent" href="/patent-detail/06130409291499.html">Self-propelled quays are used to remove sediment and solid waste from tubular streams, rivers, lakes and lakes.</a> <b>[P]</b> . <span> 外国专利：  NI201500108A </span> <span> . 2017-07-11</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：自走式码头用于清除管状溪流，河流，湖泊和湖泊中的沉积物和固体废物。 </span> </p> </li> <li> <div> <b>5. </b><a class="enjiyixqcontent" href="/patent-detail/06130448190346.html">Method to remove undesired solutes, e.g. alkali, salts or acids, from lake water; involves separating part of lake off using dam or wall and having pipe in lower part of dam to connect lake parts</a> <b>[P]</b> . <span> 外国专利：  DE10010152A1 </span> <span> . 2001-09-06</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：去除不良溶质的方法湖泊水中的碱，盐或酸;涉及使用大坝或墙将湖的一部分分开，并在大坝的下部安装管道以连接湖泊部分 </span> </p> </li> </ul> </div> </div> </div> <div class="theme cardcommon" style="overflow: auto;display:none"> <h3 class="all_title" id="enpatent55">相关主题</h3> <ul id="subject"> </ul> </div> </div> </div> </div> <div class="right rightcon"> <div class="details_img 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