Sediment imprint of the severe 2002 summer flood in the Lehnmühle reservoir, eastern Erzgebirge (Germany)

EG Quaternary Science Journal Pub Date : 2011-12-08 DOI:10.3285/EG.61.1.01

L. Kämpf, A. Brauer, P. Dulski, K. Feger, F. Jacob, E. Klemt

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引用次数: 10

Abstract

Aseriesof �18 �shortcor eshasb eenobtaine dfr omtheLehnmuhler eservoir �( operationsince �1932) �ine asternEr zgebirge �( Ger- many) �inordertoinv estigatetheeffe ctsofthese vereflo ode ventinA ugust �2002 �onse dimentationb ycombiningmicr ofacies � andhighr esolution �µ-X RFscanningte chniques. �Adistinctgrade ddetritallay er, �uniqueforthewholer ecord, �app earsinalmost � theentir er eservoirbasin, �ranginginthicknessfr om �33 �mmatpr oximalsitesclosetotheriv erinflo wto �5 �mmatdistalsites. � Thetotalse dimentinfluxduringthise ventwasestimate dtoappr oximately �2,400 �tons. �Ar oundtw o-thirdsofthese dimentwas � dep ositedinthesouther n-centralp artofthebasin �( approx. �32 �% �ofthebasinar ea) �duetobasinmor phometryandpr oximityto � theinflo w. �Anenhance dfluxoffinesiltandclay stoar easne arthedamwasobser vedandislik elydriv enb yaste adycur rent � to wardsthedam. �O ccurrenceofdetritalmaterialinalateralbayr evealsthatse dimentderiv ednotonlyfr omthemaininflo w � butalsofromsurfacerunoffthroughnon-permanentlywaterbearingstreamchannelsaroundthereservoir. � � Inadditiontothee xceptional �2002 �flo odlay er, �22 �micr oscopicallythindetritallay ersw eredete ctedinthese dimentcor es, �most � ofthematthede epestcor elo cationsclosetothemaindam. �Achr onologyofdetritallay erswasestablishe db y � 137 Csdatingof � thr eecor ese quencesandwastransfer redtoothercor esb ydetaile dcor relationbase donfourlithologicalmark ers. �Thecom - parisonwithinstr umentaldatar evealsthat �64 �% �ofthetotal �22 �flo ode ventso verthelastthr eede cadeswithadailydischar ge �> � 8 � m3s-1�ofthemaininflowingstreamresultedindepositionofalayerofdetritalmaterialinthereservoirbasin.�

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德国Erzgebirge东部lehnm hle水库2002年夏季特大洪水的沉积物印记

2002年8月，通过结合微相和高分辨率的微x射线扫描技术，获得了一系列的“18”短通道通道(自1932年开始运行)和“21”通道(Ger- many)，以研究这些通道通道通道的影响。“在整个记录中都是独一无二的”，“几乎覆盖了整个储层盆地”，厚度范围从“33”毫米厚的极值点到接近极值点的极值点到“5”毫米厚的极值点。“在这些风险中，总尺寸流入估计约为2400吨。”大约三分之二的空间位于盆地的南部和中部。“32%”的盆地是由于“盆地”更接近“入水口”，“土壤和粘土的流动增加”，“大坝”被观测到，“不像被驱动的废物和水流”，以保护大坝。碎屑物质的横向分布表明，这些物质的来源不仅来自主要的入流，还来自储层周围非永久性含水河道的地表。除了“2002年”的几个特例外，“2002年”的“微观尺度”的“微观尺度”在这些尺度上都有明显的变化，“大多数”的“微观尺度”都接近于“主尺度”。通过对4个岩性标记物的详细关系分析，建立了3个岩性标记物的岩性层序定年和岩屑转移的岩性本体论。与仪器数据的对比表明，在总流量为22立方米的河流中，有64%的河流日流量为8立方米/立方米/立方米，导致沉积了大量碎屑物质

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EG Quaternary Science Journal

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