Impacts of improved grazing land management on sediment yields, Part 1: Hillslope processes

Bartley, Rebecca; Corfield, J; Abbott, Brett N.; Hawdon, Aaron; Wilkinson, Scott N.; Nelson, Brigid

doi:10.1016/j.jhydrol.2010.05.002

Cited by 67 publications

(51 citation statements)

References 32 publications

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“…The area has granodiorite lithology [82,83] and is dominated by chromosol soil, a sandy clay loam, known locally as red goldfields soil. Chromosol soils, which cover approximately 12% of the Burdekin River basin, contain numerous gullies and are a priority for management intervention [84].…”

Section: Study Sitementioning

confidence: 99%

Assessment of UAV and Ground-Based Structure from Motion with Multi-View Stereo Photogrammetry in a Gullied Savanna Catchment

Koci

Jarihani

Leon

et al. 2017

IJGI

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Abstract:Structure from Motion with Multi-View Stereo photogrammetry (SfM-MVS) is increasingly used in geoscience investigations, but has not been thoroughly tested in gullied savanna systems. The aim of this study was to test the accuracy of topographic models derived from aerial (via Unmanned Aerial Vehicle, 'UAV') and ground-based (via handheld digital camera, 'ground') SfM-MVS in modelling hillslope gully systems in a dry-tropical savanna, and to assess the strengths and limitations of the approach at a hillslope scale and an individual gully scale. UAV surveys covered three separate hillslope gully systems (with areas of 0.412-0.715 km 2 ), while ground surveys assessed individual gullies within the broader systems (with areas of 350-750 m 2 ). SfM-MVS topographic models, including Digital Surface Models (DSM) and dense point clouds, were compared against RTK-GPS point data and a pre-existing airborne LiDAR Digital Elevation Model (DEM). Results indicate that UAV SfM-MVS can deliver topographic models with a resolution and accuracy suitable to define gully systems at a hillslope scale (e.g., approximately 0.1 m resolution with 0.4-1.2 m elevation error), while ground-based SfM-MVS is more capable of quantifying gully morphology (e.g., approximately 0.01 m resolution with 0.04-0.1 m elevation error). Despite difficulties in reconstructing vegetated surfaces, uncertainty as to optimal survey and processing designs, and high computational demands, this study has demonstrated great potential for SfM-MVS to be used as a cost-effective tool to aid in the mapping, modelling and management of hillslope gully systems at different scales, in savanna landscapes and elsewhere.

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Section: Study Sitementioning

confidence: 99%

Assessment of UAV and Ground-Based Structure from Motion with Multi-View Stereo Photogrammetry in a Gullied Savanna Catchment

Koci

Jarihani

Leon

et al. 2017

IJGI

Self Cite

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“…When grazing pressure is increased, grasslands' and even forests' geomorphic systems may be pushed toward a state more characteristic of a desert biome by decreasing riparian biomass, resulting in reduced cover and increased patches of bare ground (Teague et al 2010). The riparian changes induced by activities of cattle increase the influence of rain splash, sheet wash, and rill formation and can induce gully development (Bartley et al 2010). Within the immediate channel and riparian environments, cattle grazing degrades stream banks, alters hydrologic and sediment processes, changes channel geometry by increasing width to depth ratios (Trimble and Mendel 1995), and dramatically increases suspended sediment yields (Vidon et al 2008).…”

Section: Interactions With Other Factors Influencing Geomorphologymentioning

confidence: 99%

The Stream Biome Gradient Concept: factors controlling lotic systems across broad biogeographic scales

et al. 2015

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We propose the Stream Biome Gradient Concept as a way to predict macroscale biological patterns in streams. This concept is based on the hypothesis that many abiotic and biotic features of streams change predictably along climate (temperature and precipitation) gradients because of direct influences of climate on hydrology, geomorphology, and interactions mediated by terrestrial vegetation. The Stream Biome Gradient Concept generates testable hypotheses related to continental variation among streams worldwide and allows aquatic scientists to understand how results from one biome might apply to a less-studied biome. Some predicted factors change monotonically across the biome/climate gradients, whereas others have maxima or minima in the central portion of the gradient. For example, predictions across the gradient from drier deserts through grasslands to wetter forests include more permanent flow, less bare ground, lower erosion and sediment transport rates, decreased importance of autochthonous C inputs to food webs, and greater stream animal species richness. In contrast, effects of large ungulate grazers on streams are expected to be greater in grasslands than in forests or deserts, and fire is expected to have weaker effects in grassland streams than in desert and forest streams along biome gradients with changing precipitation and constant latitude or elevation. Understanding historic patterns among biomes can help describe the evolutionary template at relevant biogeographic scales, can be used to broaden other conceptual models of stream ecology, and could lead to better management and conservation across the broadest scales.

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“…Other major sources of erosion/runoff in plantation forests include roads (and their sidecast), landing sites, shallow landslides, and channel scouring/gullying [20][21][22]. Similar processes, but at a finer spatial scale, can take place with intensive grazing [23][24][25], particularly where rotational paddocks are cyclically grazed to bare ground and left to recover. The recovery time depends on weather conditions and soil moisture/fertility [26].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Changes in Land Cover and Sediment Runoff in a New Zealand Catchment Dominated by Plantation Forestry and Livestock Grazing

Kamarinas

Julian

Hughes

et al. 2016

Water

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Land cover can change frequently on intensively managed landscapes, affecting water quality across different spatiotemporal scales. Multi-resolution datasets are necessary in order to assess the extent and trends of these changes, as well as potential cross-scale interactions. In this study, both spatial and temporal analyses of land disturbance (i.e., soil exposure from vegetation removal) and water quality were performed on datasets ranging from daily to yearly time scales. Time-series analyses of land disturbance were compared against the water quality variables of total suspended solids (TSS), turbidity, and visual clarity for the Hoteo River catchment on the North Island of New Zealand for the 2000-2013 period. During forest harvest and recovery phases, exotic forests were the dominant disturbance, up to five times the area of grassland disturbance; while after recovery, grasslands assumed the dominant role, for up to 16 times the area of forest disturbance. Time-series of TSS from field sampling (2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013) and TSS-event analyses (2012-2014) displayed distinct nonlinear patterns, suggesting that after major events, sediment that is stored in the landscape is exhausted and a period of sediment build-up follows until the next major event. Time-series analyses also showed a connection between trends in connected land disturbance and visual water clarity, with connected disturbance having the potential to be a water quality indicator. Future research should be conducted at even finer spatiotemporal scales over longer periods in order to identify effects of localized land disturbances on downstream water quality.

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Impacts of improved grazing land management on sediment yields, Part 1: Hillslope processes

Cited by 67 publications

References 32 publications

Assessment of UAV and Ground-Based Structure from Motion with Multi-View Stereo Photogrammetry in a Gullied Savanna Catchment

Assessment of UAV and Ground-Based Structure from Motion with Multi-View Stereo Photogrammetry in a Gullied Savanna Catchment

The Stream Biome Gradient Concept: factors controlling lotic systems across broad biogeographic scales

Nonlinear Changes in Land Cover and Sediment Runoff in a New Zealand Catchment Dominated by Plantation Forestry and Livestock Grazing

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