Structure-from-Motion Photogrammetry and Rare Earth Oxides can quantify diffuse and convergent soil loss and source apportionment
作者机构：CREWWGeographyFaculty of EnvironmentScience and EconomyUniversity of ExeterExeterDevonEX44RJUnited Kingdom Environment and Sustainability InstituteUniversity of ExeterPenrynCornwallTR109FEUnited Kingdom Lancaster Environment CentreLancaster UniversityBailriggLancasterLA14YQUnited Kingdom GeographyFaculty of EnvironmentScience and Economy.University of ExeterExeterDevonEX44RJUnited Kingdom
出 版 物：《International Soil and Water Conservation Research》 (国际水土保持研究（英文）)
年 卷 期：2023年第11卷第4期
页 面：633-648页
核心收录：
学科分类：082802[工学-农业水土工程] 0907[农学-林学] 08[工学] 09[农学] 0710[理学-生物学] 090707[农学-水土保持与荒漠化防治] 0828[工学-农业工程] 0818[工学-地质资源与地质工程] 0903[农学-农业资源与环境] 0815[工学-水利工程] 0901[农学-作物学] 0833[工学-城乡规划学] 0713[理学-生态学] 0834[工学-风景园林学（可授工学、农学学位）]
基 金：funded by and carried out under the UK Department for Environment Rural Affairs project 'Piloting a cost-effective framework for monitoring soil erosion in England and Wales'
主 题：Soil erosion Structure-from-Motion Photogrammetry Rare Earth Oxides Tracers Sediment Rainfall simulator Sheetwash Rilling Interrill
摘 要：Accurately quantifying rates of soil erosion requires capturing both the volumetric nature of the visible,convergent fluvial pathways(also known as rills)and the subtle nature of the less-visible,diffuse pathways(interrill areas).The aim of this study was to use Rare Earth Oxide(REO)tracers and Structure-from-Motion(SfM)photogrammetry to elucidate retrospective information about soil erosion rates and sediment sources during different soil erosion conditions,within a controlled laboratory *** experimental conditions created erosion events consistent with diffuse and convergent erosion *** tracers allowed the sediment transport distances of over 2 m to be described,and helped resolved the relative contribution of diffuse and convergent soil erosion;interrill areas were also iden-tified as a significant sediment sources soil loss under convergent erosion *** the potential for SfM photogrammetry to resolve sub-millimetre elevations changes was demonstrated,under some conditions non-erosional changes in surface elevation,such as compaction,exceeded volumes of soil loss via diffuse *** discrepancies between SfM Photogrammetry calculations and REO tagged sediment export were beneficial,identifying that during soil erosion events sediment in both aggregate and particle form is deposited within the convergent features,even when the rill extended the full length of the soil *** combination of SfM photogrammetry and REO tracers has provided a novel platform for building a spatial understanding of patterns of soil loss and source apportionment between rill and interrill erosion.
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