Estimating short-term soil erosion rates after single and multiple rainfall events by modelling the vertical distribution of cosmogenic 7Be in soils

Jha, Abhinand; Schkade, Uwe; Kirchner, Gerald

doi:10.1016/j.geoderma.2014.12.020

Cited by 14 publications

(6 citation statements)

References 23 publications

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“…The temporal shift of erosion processes from interrilldominated at the start of erosion to channel-dominated in later stages of the erosive event has also been found by others (e.g., Liu et al (2011) and Wilson et al (2012)). The spatial scales at which erosion processes have been investigated with radionuclides varied from plot and hillslope (e.g., Jha, Schkade, and Kirchner (2015), Liu et al (2011) and Porto and Walling (2014)) to whole watershed assessments (e.g., Geeraert et al (2015), Gourdin et al (2014) and Wilson et al (2014)). Meteorically-delivered radionuclides such as Be-7 have less often been used in arid and semiarid environments as a short-term sediment tracer because low and highly variable precipitation regimes hinder reliable interpretation of radioactivity measurement (Kaste, Elmore, Vest, & Okin, 2011).…”

Section: Contribution Of Concentrated Flow To Total Erosionmentioning

confidence: 99%

A review of concentrated flow erosion processes on rangelands: Fundamental understanding and knowledge gaps

Nouwakpo

Williams

Al‐Hamdan

et al. 2016

International Soil and Water Conservation Research

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Section: Contribution Of Concentrated Flow To Total Erosionmentioning

confidence: 99%

A review of concentrated flow erosion processes on rangelands: Fundamental understanding and knowledge gaps

Nouwakpo

Williams

Al‐Hamdan

et al. 2016

International Soil and Water Conservation Research

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“…Heavy rainfall events have unique impacts which may include soil water saturation or flooding and related oxygen depletion, surface flooding, poor nutrient transport and ethylene production in plants, which restricts growth (Chen et al ., , ; Voesenek et al ., ). Heavy rainfall may reduce long‐term productive capacity of soil as a result of nutrient loss (Sepulveda et al ., ; Jha et al ., ; Burt et al ., ; Marzen et al ., ). Collectively, these studies demonstrate how the temporal pattern and event size of precipitation and resulting soil moisture regime represent an important knowledge gap.…”

Section: Introductionmentioning

confidence: 98%

Ecological responses to heavy rainfall depend on seasonal timing and multi‐year recurrence

Zheng

et al. 2019

New Phytologist

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Summary Heavy rainfall events are expected to increase in frequency and severity in the future. However, their effects on natural ecosystems are largely unknown, in particular with different seasonal timing of the events and recurrence over multiple years. We conducted a 4 yr manipulative experiment to explore grassland response to heavy rainfall imposed in either the middle of, or late in, the growing season in Inner Mongolia, China. We measured hierarchical responses at individual, community and ecosystem levels. Surprisingly, above‐ground biomass remained stable in the face of heavy rainfall, regardless of seasonal timing, whereas heavy rainfall late in the growing season had consistent negative impacts on below‐ground and total biomass. However, such negative biomass effects were not significant for heavy rainfall in the middle of the growing season. By contrast, heavy rainfall in the middle of the growing season had greater positive effects on ecosystem CO2 exchanges, mainly reflected in the latter 2 yr of the 4 yr experiment. This two‐stage response of CO2 fluxes was regulated by increased community‐level leaf area and leaf‐level photosynthesis and interannual variability of natural precipitation. Overall, our study demonstrates that ecosystem impacts of heavy rainfall events crucially depend on the seasonal timing and multiannual recurrence. Plant physiological and morphological adjustment appeared to improve the capacity of the ecosystem to respond positively to heavy rainfall.

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“…The model has been extensively tested by the developers in Australia and UK catchments with monitoring stations of rainfall, discharge and sediment flux [16,[35][36][37][38] but its ability needs to be verified in other geological and morpho-climate setting. isotopes is an effective approach with a high potential [13][14][15][16][17][18] although it requires a high degree of economic and time effort that frequently provides limited results in terms of spatial and temporal coverage of denudation rate estimation. In recent years, several factors such as advances in knowledge of numerical equations of landscape processes, increase of computational speed, and large availability of high-resolution digital elevation models (DEMs) have promoted the improvement of many physically-based soil erosion models.…”

Section: Introductionmentioning

confidence: 99%

Testing the Prediction Ability of LEM-Derived Sedimentary Budget in an Upland Catchment of the Southern Apennines, Italy: A Source to Sink Approach

Gioia

Lazzari

2019

Water

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Landscape evolution models (LEMs) represent one of the most promising approaches to evaluate sedimentary budget, although factors such as the high number of parameters or the difficulty evaluating the robustness of the results can represent a limitation in their application in natural landscapes. In this paper, the Caesar–Lisflood LEM has been applied in a small catchment (i.e., about 9 km2) of southern Italy draining an artificial reservoir in order to test its ability to predict sediment flux and erosion rate. Short-term (i.e., about 20 years) estimation of the sediment volumes accumulated in the reservoir has been reconstructed by a bathymetric survey and compared to the results coming from the coeval LEM simulations. Results indicate a good accordance between LEM-based erosion volume estimations and direct sedimentation assessment, thus testifying to the high potential of such models to solve issues of sedimentary budget and short-term landscape modification.

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Estimating short-term soil erosion rates after single and multiple rainfall events by modelling the vertical distribution of cosmogenic 7Be in soils

Cited by 14 publications

References 23 publications

A review of concentrated flow erosion processes on rangelands: Fundamental understanding and knowledge gaps

A review of concentrated flow erosion processes on rangelands: Fundamental understanding and knowledge gaps

Ecological responses to heavy rainfall depend on seasonal timing and multi‐year recurrence

Testing the Prediction Ability of LEM-Derived Sedimentary Budget in an Upland Catchment of the Southern Apennines, Italy: A Source to Sink Approach

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