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首页> 外文会议>Erosion and sediment yields in the changing environment >Investigating an Alpine proglacial sediment budget using field measurements, airborne and terrestrial LiDAR data
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Investigating an Alpine proglacial sediment budget using field measurements, airborne and terrestrial LiDAR data

机译：使用野外测量，机载和地面LiDAR数据调查高山湖泊冰川沉积物预算

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摘要

The ongoing recession of Alpine glaciers since the end of the Little Ice Age (LIA) has exposed stores of glacial sediment to the activity of paraglacial processes. Slope wash, fluvial processes and mass movements (including debris flows, slides and falls) within the proglacial area (i.e. the area within the LIA terminal moraines) have received comparatively little attention in previous studies of the (pro)glacial sediment budget that have focused mainly on suspended and bedload sediment transport in proglacial streams. Additionally, there is a need for research concerning the relative importance of non-glacial and glacial contributions to the sediment budget and the downstream consequences of increased proglacial geomorphic activity. The PROSA joint project (High-resolution measurements of morphodynamics in rapidly changing PROglacial Systems of the Alps) is designed to tackle these problems through a quantification of the aforementioned hillslope and channel processes within the forefield of the Gepatsch Glacier (Central Alps, Austria) using high-resolution LiDAR data. On the local scale, field measurements and digital elevation models from multi-epoch terrestrial LiDAR data will be combined to map and quantify sediment (re-)mobilisation, erosion and deposition. The catchment-scale sediment budget will be established by multi-epoch high-resolution airborne LiDAR data, upscaling of local findings using geomorphological models including the appraisal of slope-channel coupling, and an assessment of fluvial sediment export beyond the outlet of the catchment (which consists of a reservoir). This paper summarises the processes effective in proglacial systems, works out research needs with respect to sediment budgets in changing proglacial areas, and outlines the research framework of the PROSA joint project. It complements two papers on preliminary results published in this volume.
机译：自小冰河时代（LIA）结束以来，高山冰川持续衰退，使冰川沉积物的储层暴露于冰期之下。在以前的（前）冰川沉积物预算研究中，冰川区（即LIA终端mo沟内的区域）内的边坡冲刷，河流过程和物质运动（包括泥石流，滑坡和坠落）很少受到关注。主要涉及冰川河溪流中的悬浮泥沙和底泥沙的输送。另外，有必要研究非冰河和冰河对沉积物预算的相对重要性以及增加的冰河地貌活动的下游后果。 PROSA联合项目（对阿尔卑斯山快速变化的冰川系统中形态动力学的高分辨率测量）旨在通过量化上述Gepatsch冰川（奥地利中部阿尔卑斯山）前场内的山坡和河道过程来解决这些问题。高分辨率LiDAR数据。在地方尺度上，将结合多时期陆地LiDAR数据的现场测量结果和数字高程模型，以绘制地图并量化沉积物（重新）迁移，侵蚀和沉积。集水区规模的泥沙预算将由多时期的高分辨率机载LiDAR数据，使用地貌模型（包括对坡道-通道耦合的评估）以及对流域出口以外河流沉积物出口的评估（其中包括一个水库）。本文总结了冰川系统有效的过程，提出了在变化的冰川区域中有关沉积物预算的研究需求，并概述了PROSA联合项目的研究框架。它补充了本卷中发表的两篇有关初步结果的论文。

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  • 来源
  • 会议地点 Chengdu(CN)
  • 作者

    TOBIAS HECKMANN; FLORIAN HAAS; DAVID MORCHE; KARL-HEINZ SCHMIDT; JOACHIM ROHN; MICHAEL MOSER; MATTHIAS LEOPOLD; MICHAEL KUHN; CHRISTIAN BRIESE; NORBERT PFEIFER; MICHAEL BECHT;

  • 作者单位

    Dept of Physical Geography, Cath. University of Eichstaett-lngolstadt, Ostenslrasse 18, D-85072 Eichstaett, Germany;

    Dept of Physical Geography, Cath. University of Eichstaett-lngolstadt, Ostenslrasse 18, D-85072 Eichstaett, Germany;

    Institute for Geosciences and Geography, University of Halle- Wittenberg, Germany;

    Institute for Geosciences and Geography, University of Halle- Wittenberg, Germany;

    Dept of Applied Geology, University of Erlangen-Nuremberg, Germany;

    Dept of Applied Geology, University of Erlangen-Nuremberg, Germany;

    Dept of Geomorphology and Soil Science, Technical University of Munich, Weihenstephan, Germany;

    Institute of Meteorology and Geophysics, University of Innsbruck, Austria;

    Institute of Photogrammetry and Remote Sensing, Vienna University of Technology, Austria;

    Institute of Photogrammetry and Remote Sensing, Vienna University of Technology, Austria;

    Dept of Physical Geography, Cath. University of Eichstaett-lngolstadt, Ostenslrasse 18, D-85072 Eichstaett, Germany;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    proglacial sediment budget; airborne LiDAR; terrestrial LiDAR; central alps; tyrol;

    机译：湖泊沉积物预算；机载激光雷达地面激光雷达中央阿尔卑斯山蒂罗尔;

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