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The use of LiDAR elevation data to map channel continuity in southeast Australia

机译：使用LiDAR高程数据来绘制澳大利亚东南部的通道连续性

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摘要

In forests managed for timber production, headwater streams are protected from timber harvesting through establishment of buffer zones. However, uncertainty about the location and extent of channels affects sustainable timber harvest planning. The capability of Light Detection and Ranging (LiDAR) data to produce a good DEM enables the identification of headwater streams under forest cover, and detection of convergent areas related to channelisation processes. The aim of this study is to test the capability of LiDAR elevation data in estimating the channel network, and in identifying channel heads and disconnected channels. The estimated channel network is compared to that obtained using a classical method - TauDEM -on the basis of a slope-area threshold. The study area is part of the Lower Cotter experimental catchments, an alpine headwater catchment located in the Brindabella Range in southeastern Australia. While the TauDEM cannot detect disconnected channels, LiDAR provides complementary results for channel continuity. However, both methods are inaccurate in predicting the location of channel heads. Additional hydrologic data from the paired-catchments are recommended to develop a logistic regression model of the channel initiation for accurate channel network extraction.
机译：在管理木材生产的森林中，通过建立缓冲区来保护源头水流免于砍伐木材。但是，有关渠道的位置和范围的不确定性会影响可持续的木材采伐计划。光检测和测距（LiDAR）数据产生良好的DEM的能力可以识别森林覆盖下的源头水流，并检测与通道化过程相关的会聚区域。这项研究的目的是测试LiDAR海拔数据在估算通道网络以及识别通道头和断开通道方面的能力。在斜率阈值的基础上，将估计的信道网络与使用经典方法TauDEM获得的信道网络进行比较。研究区域是下科特实验流域的一部分，该流域是位于澳大利亚东南部布林达贝拉山脉的高山源水集水区。尽管TauDEM无法检测到断开的通道，但LiDAR可提供互补的结果以保持通​​道连续性。但是，两种方法在预测通道头的位置时都不准确。建议使用来自成对汇水区的其他水文数据来开发通道启动的逻辑回归模型，以准确地提取通道网络。

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  • 来源
  • 会议地点 Melbourne(AU);Melbourne(AU);Melbourne(AU)
  • 作者

    XIAOYING SUN; CHRISTOPHER THOMPSON; BARRY CROKE;

  • 作者单位

    Integrated Catchment Assessment and Management Centre (iCAM), Fenner School of Environment and Society (FSES), The Australian National University, Canberra, Australia Capital Territory 0200, Australia,Mathematical Sciences Institute (MSI), The Australian National University, Canberra, Australia Capital Territory 0200,Australia;

    Integrated Catchment Assessment and Management Centre (iCAM), Fenner School of Environment and Society (FSES), The Australian National University, Canberra, Australia Capital Territory 0200, Australia;

    Integrated Catchment Assessment and Management Centre (iCAM), Fenner School of Environment and Society (FSES), The Australian National University, Canberra, Australia Capital Territory 0200, Australia,Mathematical Sciences Institute (MSI), The Australian National University, Canberra, Australia Capital Territory 0200,Australia;

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

    channel network; channel head; disconnected channel; light detection and ranging (LiDAR); digital elevation model (DEM);

    机译：渠道网络；通道头断开通道；光检测和测距（LiDAR）；数字高程模型（DEM）;

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