Evaluating ephemeral gullies with a process-based topographic index model

Daggupati, Prasad; Sheshukov, Aleksey Y.; Douglas-Mankin, Kyle R.

doi:10.1016/j.catena.2013.10.005

Cited by 41 publications

(27 citation statements)

References 45 publications

(48 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the last decades, the importance of gully erosion has been widely recognized (Capra et al, 2009;Cheng et al, 2007;Daggupati et al, 2014;Nachtergaele et al, 2001;Stefano et al, 2013;Woodward, 1999). Poesen et al (2003) distinguished ephemeral gullies from rills by a critical cross-sectional area of 929 cm 2 (1 ft 2 ), while others defined it with a critical width, such as 0.3 m (Brice, 1966) or 0.5 m (Imeson and Kwaad, 1980).…”

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Estimation of the sediment transport capacity in eroding ephemeral gullies with a flume experiment method

Zhang

Dong

et al. 2015

CATENA

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Estimation of the sediment transport capacity in eroding ephemeral gullies with a flume experiment method

Zhang

Dong

et al. 2015

CATENA

View full text Add to dashboard Cite

“…Daggupati et al . (), using several topographic index‐ and process‐based models, obtained optimal κ values ranging from 0.17 to 0.3 and R 2 correlations from 0.39 to 0.5. A more recent study by Sheshukov et al .…”

Section: Resultsmentioning

confidence: 99%

Evaluating functional connectivity in a small agricultural catchment under contrasting flood events by using UAV

Calsamiglia

Gago

García-Comendador

et al. 2020

Earth Surf Processes Landf

View full text Add to dashboard Cite

Concentrated erosion, a major feature of land degradation, represents a serious problem for soil and water resources management and a threat to ecosystems. Understanding the internal mechanisms (de‐)coupling sediment pathways can improve the management and resilience of catchments. In this study, concentrated erosion and deposition forms were mapped accurately through field and aerial unmanned aerial vehicle (UAV) campaigns, in order to assess the evolution of connectivity pathways over a series of three contrasted and consecutive flood events occurring between October 2016 and January 2017 (return period ranging from 0.5 to 25 years) in a small Mediterranean agricultural catchment (Can Revull, Mallorca, Spain; 1.4 km2). In addition, a morphometric index of connectivity (IC) was used to identify the potential trajectories of different concentrated erosion forms and deposition areas. IC predictions were calibrated by identifying the optimal critical thresholds, i.e. those most consistent with field observations after each of the events studied. The results found that the index performed well in predicting the occurrence and the length/area of the different type of landforms, giving kappa (κ) coefficients of variation ranging between 0.21 and 0.92 and linear correlations R2 between 0.33 and 0.72. The type of landform affected the correspondence of IC predictions and field observations, with lower thresholds the greater the magnitude of their associated geomorphic processes. Rainfall magnitude proved to be a very important factor controlling the development of erosion and deposition landforms, with large differences in length/area between the contrasted events. The evolution of the observed trajectories revealed feedback dynamics between the structural and functional connectivity of the catchment, in which morphological changes determined the spatial distribution of the processes’ activity in the successive events and vice versa. © 2020 John Wiley & Sons, Ltd.

show abstract

“…In order to use the proposed gully model in regional watershed models, one of three methods is often employed to assess the magnitude of soil loss due to gully erosion within the watershed: (1) identification of all existing gullies in the watershed using air photographs and field work; (2) identification of potential gully initiation points and their density by a priori modeling of threshold conditions from detailed modeling of parameters such as slope, drainage area, runoff and rock fragments (Torri and Poesen, ); or the OFT‐SWAT model after Daggupati et al . () and/or; (3) based on statistical analysis of gully density and general gully dimensions from a statistical sampling of homogeneous soil–landscape regions as used in the Sednet Model (Prosser et al, ) or similar work by Zhao et al . () in the Chinese Loess Plateau.…”

Section: Introductionmentioning

confidence: 99%

Application of a simple headcut advance model for gullies

Allen

Arnold

Auguste

et al. 2017

Earth Surf Processes Landf

View full text Add to dashboard Cite

Gully erosion begins in streambanks and uplands as a consequence of adjustments in driving forces on the landscape imposed by changes in land use or climate. The deleterious effects of gullies worldwide have led to many site-specific studies of gully form and function. In the continental United States, gully erosion in agricultural land has destroyed valuable farmland yet, prediction of gully processes remains problematic on a national scale. This research has proposed a simple method to predict gully headcut advance. When combined with SWAT hydrologic flow routines, the model predicted gully headcut advance with reasonable accuracy on a daily time step for time periods exceeding two decades. The model was tested in two distinct land resource areas of the United States with differing climate, soils, cover and drainage. The inputs for the headcut model have been kept simple as the model will be applied over large areas. Model inputs consist of headcut height, headcut resistance (based on soil erodibility and a rootcover factor), and daily flow. The model is compared with an annual time step model used in assessment of headcut advance and appears to offer a better way to assess gully headcut advance.

show abstract

Evaluating ephemeral gullies with a process-based topographic index model

Cited by 41 publications

References 45 publications

WITHDRAWN: Estimation of the sediment transport capacity in eroding ephemeral gullies with a flume experiment method

WITHDRAWN: Estimation of the sediment transport capacity in eroding ephemeral gullies with a flume experiment method

Evaluating functional connectivity in a small agricultural catchment under contrasting flood events by using UAV

Application of a simple headcut advance model for gullies

Contact Info

Product

Resources

About