Comparison of gully erosion estimates using airborne and ground-based LiDAR on Santa Cruz Island, California

Perroy, Ryan L.; Bookhagen, Bodo; Asner, Gregory P.; Chadwick, Oliver A.

doi:10.1016/j.geomorph.2010.01.009

Cited by 225 publications

(192 citation statements)

References 40 publications

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“…Removal of productive lands has severe economic consequences as reduction in productivity results in a net loss as well as the effort and finances required to mitigate further damage from gullying. Other major damages caused by gully extension is the undermining of existing infrastructure such as fences, buildings, roads and utilities (Perroy et al, 2010).…”

Section: Consequences Of Soil Erosionmentioning

confidence: 99%

Tracing shallow lateral preferential pathways of fluid movement using electrical geophysics

Finn

Lackie

2018

ASEG Extended Abstracts

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Section: Consequences Of Soil Erosionmentioning

confidence: 99%

Tracing shallow lateral preferential pathways of fluid movement using electrical geophysics

Finn

Lackie

2018

ASEG Extended Abstracts

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“…Apesar deste método ainda ser amplamente utilizado, outras formas de levantamentos de dados têm sido aplicadas, fornecendo maior amostragem de dados, rapidez e precisão, como é o caso dos levantamentos topográficos convencionais ou com uso de equipamento laser (Light Amplification by Stimulated Emission of Radiation) escâner terrestre (PERROY et al, 2010).…”

Section: Mapeamento E Monitoramento De Voçorocasunclassified

“…Atualmente, os estudos mostram uma busca por métodos automáticos ou semiautomáticos, em abordagem orientada a objeto, para detecção, mapeamento e monitoramento, bem como para cálculos volumétricos e modelos preditivos de risco de erosão (PERROY et al, 2010;SHRUTHI, KERLE e JETTEN, 2011e 2012JOHANSEN et al, 2012;WANG et al, 2014). Alkhasawneh et al (2014) realizaram estudo para determinar a susceptibilidade a deslizamentos e movimentos de massa, em função de variáveis topográficas e geológicas, com auxílio de algoritmos de árvores de decisão.…”

Section: Mapeamento E Monitoramento De Voçorocasunclassified

Detecção de formação erosiva (voçoroca) por meio de classificação hierárquica e por árvore de decisão

2014

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Este estudo teve por objetivo verificar a possibilidade de reconhecimento de feições erosivas do tipo voçoroca utilizando análise orientada a objeto (OBIA - Object-Based Image Analysis). A área de estudo está localizada no município de Uberlândia, em Minas Gerais. Em função do objetivo, definiu-se uma rede semântica hierárquica multinível para representação do conhecimento especialista. Foram usados dados espectrais oriundos de imagem IKONOS e dados de intensidade e altimétricos provenientes de perfilamento com ALS (Airborne Laser Scanner). Os objetos foram gerados por meio de segmentação multirresolução (FNEA-Fractal Net Evolution Approach) aplicada aos dados espectrais e altimétricos. O reconhecimento das feições foi realizado por classificação hierárquica e por árvores de decisão (algoritmo CART-Classification And Regression Trees). A metodologia permitiu a identificação da relevância dos dados de entrada, parâmetros de segmentação e atributos a serem usados para classificação das voçorocas. Os resultados obtidos com a classificação hierárquica e com CART foram bastante similares, os quais evidenciaram a possibilidade do uso do método semiautomatizado a partir dos parâmetros previamente identificados e analisados.

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“…Mapping gullies using remote sensing began in the 1970s (e.g., Patton and Schumm, 1975) but advancing digital technology in the 21st century now allows for even more detailed mapping using geographic information systems (GIS) and digital elevation models (DEM). Mapping the extent of incised channels can involve visual detection (hand digitizing) in conjunction with delineating a zone around channels based on channel size using GIS (called buffering) (e.g., Perroy et al, 2010) or more automated approaches using digital terrain analysis (Evans and Lindsey, 2010;Castillo et al, 2014) or object-oriented classification of gullies (Shruthi et al, 2011;Johansen et al, 2012). Quantifying erosion rates along incised channels often involves calculating the surface elevation difference between current and pre-gully DEMs (Perroy et al, 2010;Evans and Lindsay, 2010), or using a time series of DEMs (Brasington et al, 2000;Fuller et al, 2003;Martínez-Casasnovas, 2003;Wheaton et al, 2010;Picco et al, 2013).…”

Section: Introduction and Objectivementioning

confidence: 99%

Delineating incised stream sediment sources within a San Francisco Bay tributary basin

2016

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Abstract. Erosion and sedimentation pose ubiquitous problems for land and watershed managers, requiring delineation of sediment sources and sinks across landscapes. However, the technical complexity of many spatially explicit erosion models precludes their use by practitioners. To address this critical gap, we demonstrate a contemporary use of applied geomorphometry through a straightforward GIS analysis of sediment sources in the San Francisco Bay Area in California, USA, designed to support erosion reduction strategies. Using 2 m lidar digital elevation models, we delineated the entire river network in the Arroyo Mocho watershed (573 km 2 ) at the scale of ∼ 30 m segments and identified incised landforms using a combination of hillslope gradient and planform curvature. Chronic erosion to the channel network was estimated based on these topographic attributes and the size of vegetation, and calibrated to sediment gage data, providing a spatially explicit estimate of sediment yield from incised channels across the basin. Rates of erosion were summarized downstream through the channel network, revealing patterns of sediment supply at the reach scale. Erosion and sediment supply were also aggregated to subbasins, allowing comparative analyses at the scale of tributaries. The erosion patterns delineated using this approach provide land use planners with a robust framework to design erosion reduction strategies. More broadly, the study demonstrates a modern analysis of important geomorphic processes affected by land use that is easily applied by agencies to solve common problems in watersheds, improving the integration between science and environmental management.

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Comparison of gully erosion estimates using airborne and ground-based LiDAR on Santa Cruz Island, California

Cited by 225 publications

References 40 publications

Tracing shallow lateral preferential pathways of fluid movement using electrical geophysics

Tracing shallow lateral preferential pathways of fluid movement using electrical geophysics

Detecção de formação erosiva (voçoroca) por meio de classificação hierárquica e por árvore de decisão

Delineating incised stream sediment sources within a San Francisco Bay tributary basin

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