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- Author:
- Robert R. Wells, et al. ; Min Li; Qianjin Liu; Hanyu Zhang; Lizhi Wang; Jibiao Geng; Show all 6 Authors
- Source:
- Catena 2022 v.216 pp. 106356
- ISSN:
- 0341-8162
- Subject:
- catenas; coarse-textured soils; erodibility; fine-textured soils; hydraulic flumes; sandy loam soils; shear stress; silt loam soils; soil erosion; soil water
- Abstract:
- ... Antecedent soil moisture is known to exert a complex, perhaps controversial, effect on rill erodibility and critical shear stress. To understand their dynamic nature as a function of antecedent soil moisture, the rill erodibility and critical shear stress for sandy loam and silty loam soil, representing coarse-grained and fine-grained soil, respectively, were measured using a hydraulic flume under ...
- DOI:
- 10.1016/j.catena.2022.106356
- https://doi.org/10.1016/j.catena.2022.106356
- Author:
- Robert R. Wells, et al. ; Gang Liu; Seth M. Dabney; Daniel C. Yoder; Dalmo A.N. Vieira; Show all 5 Authors
- Source:
- Soil & tillage research 2019 v.192 pp. 121-133
- ISSN:
- 0167-1987
- Subject:
- Revised Universal Soil Loss Equation; algorithms; biomass; clay; clay fraction; cropland; data collection; databases; forests; grasses; land use; pastures; reduced tillage; regression analysis; sediments; soil organic carbon; soil quality; standard deviation; water stable soil aggregates; United States
- Abstract:
- ... Land management that improves soil quality is known to increase the amount of water-stable soil aggregates, but many current soil erosion models do not consider land management effects when estimating the size distribution of eroded sediment. Our objective was to develop a method to improve eroded sediment size estimates in response to alternative land management practices using information availa ...
- DOI:
- 10.1016/j.still.2019.04.012
- CHORUS:
- 10.1016/j.still.2019.04.012
- https://doi.org/10.1016/j.still.2019.04.012
- Author:
- Robert R. Wells, et al. ; Chao Qin; Henrique G. Momm; Ximeng Xu; Glenn V. Wilson; Fenli Zheng; Show all 6 Authors
- Source:
- Soil & tillage research 2019 v.191 pp. 306-316
- ISSN:
- 0167-1987
- Subject:
- automation; bank erosion; cameras; color; computers; laboratory experimentation; monitoring; photogrammetry; prediction; rivers; sediment transport; sediment yield; sediments; soil; ultrasonics
- Abstract:
- ... Accurate soil erosion monitoring provides a basis for soil erosion prediction and prevention. Channel bank erosion quantification is prerequisite to couple effectively the bank sediment supply system with fluvial sediment transport fluxes. The objectives of this study were to describe and evaluate methods for monitoring and data post-analysis of channel widening in the presence of a non-erodible l ...
- DOI:
- 10.1016/j.still.2019.04.002
- https://doi.org/10.1016/j.still.2019.04.002
4. Evaluation of Sediment Load Reduction by Natural Riparian Vegetation in the Goodwin Creek Watershed
- Author:
- Robert R. Wells, et al. ; Henrique G. Momm; Lindsey M. W. Yasarer; Ronald L. Bingner; Roger A. Kunhle; Show all 5 Authors
- Source:
- Transactions of the ASABE v.62 no.5 pp. 1325-1342
- ISSN:
- 2151-0032
- Subject:
- clay; pollutants; riparian vegetation; sand; sediment contamination; sediment yield; silt; streams; suspended sediment; watersheds
- Abstract:
- ... Natural riparian vegetation can contribute to edge-of-field filtering of nonpoint-source (NPS) pollutants and function as a conservation structure. The challenge resides in quantifying the performance of riparian vegetation. In this study, the impact of natural and constructed riparian vegetation in reducing sediment loads was evaluated at field and watershed scales in the Goodwin Creek experiment ...
- DOI:
- 10.13031/trans.13492
- https://doi.org/10.13031/trans.13492
- Author:
- Robert R. Wells, et al. ; Chao Qin; Fenli Zheng; Ximeng Xu; Bin Wang; Keyuan Zhong; Show all 6 Authors
- Source:
- Soil & tillage research 2018 v.178 pp. 22-31
- ISSN:
- 0167-1987
- Subject:
- equations; gully erosion; highlands; overland flow; photogrammetry; plow pans; plows; prediction; sediments; soil blocks; time series analysis; watersheds
- Abstract:
- ... Gully erosion contributes large amounts of sediment within watersheds around the world. Gully widening constitutes about 80% of total soil loss, especially in the presence of a plow pan which manifests a less or non-erodible soil layer. Current knowledge on sidewall toe scour (scour arcs) and tension crack processes in gully widening is limited. Thus, simulated channel sidewall expansion tests, wh ...
- Handle:
- 10113/5904947
- DOI:
- 10.1016/j.still.2017.12.008
- https://doi.org/10.1016/j.still.2017.12.008
- Author:
- Robert R. Wells, et al. ; Henriqie G. Momm; Sean J. Bennett; Show all 3 Authors
- Source:
- Earth surface processes and landforms 2018 v.43 no.2 pp. 543-552
- ISSN:
- 1096-9837
- Subject:
- landforms; landscapes; photogrammetry; prediction; rain; raindrop impact; rill erosion; runoff; sediments; soil; soil resources; watersheds
- Abstract:
- ... Soil‐mantled landscapes subjected to rainfall, runoff events, and downstream base level adjustments will erode and evolve in time and space. Yet the precise mechanisms for soil erosion also will vary, and such variations may not be adequately captured by soil erosion prediction technology. This study sought to monitor erosion processes within an experimental landscape filled with packed homogenous ...
- Handle:
- 10113/5934971
- DOI:
- 10.1002/esp.4268
- https://doi.org/10.1002/esp.4268
- Author:
- Robert R. Wells, et al. ; Maliheh Karamigolbaghi; Seyed Mohammad Ghaneeizad; Joseph F. Atkinson; Sean J. Bennett; Show all 5 Authors
- Source:
- Geomorphology 2017 v.295 pp. 529-536
- ISSN:
- 0169-555X
- Subject:
- data collection; databases; equations; erodibility; sediments; shear stress; soil erosion; uncertainty; United States
- Abstract:
- ... The submerged Jet Erosion Test (JET) is a commonly used technique to assess the erodibility of cohesive soil. Employing a linear excess shear stress equation and impinging jet theory, simple numerical methods have been developed to analyze data collected using a JET to determine the critical shear stress and erodibility coefficient of soil. These include the Blaisdell, Iterative, and Scour Depth M ...
- Handle:
- 10113/5810581
- DOI:
- 10.1016/j.geomorph.2017.08.005
- https://doi.org/10.1016/j.geomorph.2017.08.005
- Author:
- Robert R. Wells, et al. ; Henrique G. Momm; Ronald L. Bingner; Randall Emilaire; Jurgen Garbrecht; Roger A. Kuhnle; Show all 6 Authors
- Source:
- Hydrological sciences journal 2017 v.62 no.10 pp. 1564-1582
- ISSN:
- 2150-3435
- Subject:
- algorithms; data collection; hydrologic models; land management; landscapes; soil types; subwatersheds; topography
- Abstract:
- ... A qualitative trial-and-error approach is commonly used to define watershed subdivisions through varying a single topographic threshold value. A methodology has been developed to quantitatively determine spatially variable threshold values using topography and a user-defined landscape reference layer. Optimization and topographic parameterization algorithms were integrated to create solutions that ...
- DOI:
- 10.1080/02626667.2017.1346794
- https://doi.org/10.1080/02626667.2017.1346794
- Author:
- Robert R. Wells, et al. ; Henrique G. Momm; Ronald L. Binger; Show all 3 Authors
- Source:
- Natural Hazards 2015 v.79 no.Suppl 1 pp. 97-112
- ISSN:
- 0921-030X
- Subject:
- batch systems; cameras; color; computer software; computers; cropland; data collection; geographic information systems; georeferencing; gully erosion; image analysis; laboratory experimentation; mass movement; ravines; reflectance; soil; space and time; tillage
- Abstract:
- ... Field observations of ephemeral gully evolution in active croplands have often revealed the presence of a less erodible soil layer that is typically associated with tillage practices (i.e., plowpan). This more erosion-resistant layer limits channel incision forcing the gully channel to expand laterally through basal scour of the bank toe and gravitational mass movement of the gully channel sidewal ...
- Handle:
- 10113/5695360
- DOI:
- 10.1007/s11069-015-1615-z
- https://doi.org/10.1007/s11069-015-1615-z
- Author:
- Robert R. Wells, et al. ; Henrique G. Momm; Ronald L. Bingner; Yongping Yuan; Martin A. Locke; Show all 5 Authors
- Source:
- Journal of environmental quality 2014 v.43 no.5 pp. 1736-1753
- ISSN:
- 0047-2425
- Subject:
- AGNPS model; agricultural land; geographic information systems; losses from soil; nutrient transport; overland flow; pollution load; riparian areas; riparian buffers; sediment deposition; sediments; topography; topsoil; vegetation types; watersheds
- Abstract:
- ... Understanding all watershed systems and their interactions is a complex, but critical, undertaking when developing practices designed to reduce topsoil loss and chemical/nutrient transport from agricultural fields. The presence of riparian buffer vegetation in agricultural landscapes can modify the characteristics of overland flow, promoting sediment deposition and nutrient filtering. Watershed si ...
- Handle:
- 10113/59589
- DOI:
- 10.2134/jeq2013.10.0413
- https://doi.org/10.2134/jeq2013.10.0413
11. Emergence, persistence, and organization of rill networks on a soil-mantled experimental landscape
- Author:
- Robert R. Wells, et al. ; Sean J. Bennett; Lee M. Gordon; Vera Neroni; Show all 4 Authors
- Source:
- Natural Hazards 2014 v.79 no.1 pp. 7-24
- Subject:
- agricultural land; landscapes; prediction; rain; resource management; rill erosion; space and time; streams; surface drainage
- Abstract:
- ... Soil erosion remains a critical concern worldwide, and predicting the occurrence, location, and evolution of rills on hillslopes and agricultural landscapes remains a fundamental challenge in resource management. To address these questions, a relatively large soil-mantled landscape was subjected to continuous rainfall and episodes of baselevel lowering to force the development of a rill network sy ...
- Handle:
- 10113/63328
- DOI:
- 10.1007/s11069-015-1599-8
- https://doi.org/10.1007/s11069-015-1599-8
- Author:
- Robert R. Wells, et al. ; Karl R. Gesch; Richard M. Cruse; Henrique G. Momm; Seth M. Dabney; Show all 5 Authors
- Source:
- Soil Science Society of America journal 2015 v.79 no.2 pp. 650-659
- ISSN:
- 0361-5995
- Subject:
- accuracy; computer software; digital elevation models; engineering; hydrology; landforms; landscapes; photogrammetry; quantitative analysis; soil science; uncertainty
- Abstract:
- ... Measurement of geomorphic change may be of interest to researchers and practitioners in a variety of fields, including geology, geomorphology, hydrology, engineering, and soil science. Landscapes are often represented by digital elevation models. Surface models generated of the same landscape over a time interval can be compared with estimate geomorphic evolution. Any such morphologicalestimate of ...
- Handle:
- 10113/60589
- DOI:
- 10.2136/sssaj2014.10.0396
- https://doi.org/10.2136/sssaj2014.10.0396
- Author:
- Robert R. Wells, et al. ; Henrique G. Momm; Sean J. Bennett; Karl R. Gesch; Seth M. Dabney; Richard Cruse; Glenn V. Wilson; Show all 7 Authors
- Source:
- Soil Science Society of America journal 2016 v.80 no.1 pp. 203-214
- ISSN:
- 0361-5995
- Subject:
- automation; conservation practices; cost effectiveness; crop yield; drainage channels; erodibility; gully erosion; labor force; landscapes; model validation; photogrammetry; ravines; topographic slope
- Abstract:
- ... When flowing water concentrates on hillslopes, the erosivity of the water may only be limited by the erodibility of the soil. Over time, concentrated flow paths may become permanent drainage channels, and such rills and ephemeral gullies often have negative impacts on crop yield and downstream sedimentation. Spatiotemporal topographic assessments of rill and gully dimensions compliment hydraulic e ...
- DOI:
- 10.2136/sssaj2015.09.0320
- https://doi.org/10.2136/sssaj2015.09.0320
- Author:
- Robert R. Wells, et al. ; Lee M. Gordon; Sean J. Bennett; Show all 3 Authors
- Source:
- Water resources research 2012 v.48 no. pp. 1-15
- ISSN:
- 1944-7973
- Subject:
- digital elevation models; overland flow; prediction; rain; rill erosion; sediment transport; sediments; soil
- Abstract:
- ... Experiments were conducted using a soil-mantled flume subjected to simulated rain and downstream baselevel lowering to quantify the growth, development, and spatiotemporal evolution of rills and rill networks. Digital elevation models constructed using photogrammetric techniques greatly facilitated data acquisition and analysis. Results show that: (1) headcuts formed by baselevel lowering were the ...
- Handle:
- 10113/58939
- DOI:
- 10.1029/2012WR012283
- https://doi.org/10.1029/2012WR012283
- Author:
- Robert R. Wells, et al. ; Henrique G. Momm; Ronald L. Bingner; Seth M. Dabney; Lyle D. Frees; Show all 5 Authors
- Source:
- Open Journal of Hydrology 2013 v.3 no.1 pp. 38-49
- ISSN:
- 2163-0461
- Subject:
- agricultural land; data collection; gully erosion; hydrology; lidar; ravines; roughness; sediments; soil; surveys; technology; topography
- Abstract:
- ... Gully erosion produces significant amounts of sediment from agricultural landscapes, but is difficult to monitor and quantify with existing technology. Scientific investigations of gullies depend on accurate and detailed topographic information to understand and evaluate the complex interactions between field topography and gully evolution. Detailed terrain representations can be produced by new t ...
- Handle:
- 10113/63310
- DOI:
- 10.4236/ojmh.2013.31006
- https://doi.org/10.4236/ojmh.2013.31006
- Author:
- Robert R. Wells, et al. ; Sean J. Bennett; Ronald L. Bingner; Seth M. Dabney; Eddy J. Langendoen; Henrique G. Momm; Mathias J. M. Romkens; Glenn V. Wilson; Show all 8 Authors
- Source:
- Journal of water resource and protection 2015 v.7 no.3 pp. 228-246
- ISSN:
- 1945-3094
- Subject:
- Agricultural Research Service; drainage; environmental impact; history; pollutants; sediments; soil erosion; stream channels; United States
- Abstract:
- ... Most authorities concede sediment from soil erosion to be the largest single stream pollutant. Physical damage from sediment includes reservoir storage loss, navigation channel filling, stream channel morphology alterations, ecological impacts, and clogging of drainage pathways. Ultimately, soil erosion is a very expensive problem. In the United States, accelerated soil erosion has been an ongoing ...
- Handle:
- 10113/60625
- DOI:
- 10.4236/jwarp.2015.73019
- https://doi.org/10.4236/jwarp.2015.73019
- Author:
- Robert R. Wells, et al. ; Henrique G. Momm; James R. Rigby; Sean J. Bennett; Ronald L. Bingner; Seth M. Dabney; Show all 6 Authors
- Source:
- Catena 2013 v.101 pp. 114-121
- ISSN:
- 0341-8162
- Subject:
- agricultural soils; arable soils; equations; eroded soils; gully erosion; overland flow; time series analysis
- Abstract:
- ... Soil erosion, in its myriad forms, devastates arable land and infrastructure. As an integral landscape feature, gully erosion is a complex system as its evolution is controlled by upstream migration of a gully head (headcut face), incision of the gully bed (plunge pool) and gravitational mass-movement (widening) on gully channel sidewalls. Bed incision is often limited by the presence of a less er ...
- Handle:
- 10113/58898
- DOI:
- 10.1016/j.catena.2012.10.004
- https://doi.org/10.1016/j.catena.2012.10.004
- Author:
- Robert R. Wells, et al. ; Carlos V. Alonso; Sean J. Bennett; Show all 3 Authors
- Source:
- Soil Science Society of America journal 2009 v.73 no.2 pp. 521-530
- ISSN:
- 0361-5995
- Subject:
- sediment yield; overland flow; upland soils; agricultural soils; equations; clay loam soils; depth; highlands; soil texture; silt loam soils; gully erosion; sandy loam soils; prediction; Southeastern United States
- Abstract:
- ... In agricultural regions, gully erosion is now recognized as a dominant source of soil loss, and the development and upstream migration of headcuts is critical to the initiation, incision, and dissection of these upland areas. This study examined the effect of soil texture on headcut development and migration using four common soils from the southeastern United States, tested on bed surface slopes ...
- Handle:
- 10113/27013
- DOI:
- 10.2136/sssaj2008.0007
- https://doi.org/10.2136/sssaj2008.0007
- Author:
- Robert R. Wells, et al. ; Burcu Uyusur; Christophe J.G. Darnault; Preston T. Snee; Emre Koken; Astrid R. Jacobson; Show all 6 Authors
- Source:
- Journal of contaminant hydrology 2010 v.118 pp. 184-198
- ISSN:
- 0169-7722
- Subject:
- hydrodynamics; ionic strength; nanoparticles; porous media; preferential flow; quantum dots; surface tension; surfactants; vadose zone
- Abstract:
- ... To investigate the coupled effects of solution chemistry and vadose zone processes on the mobility of quantum dot (QD) nanoparticles, laboratory scale transport experiments were performed. The complex coupled effects of ionic strength, size of QD aggregates, surface tension, contact angle, infiltration and water content on the mobility and transport of QDs were demonstrated. As ionic strength incr ...
- Handle:
- 10113/58941
- DOI:
- 10.1016/j.jconhyd.2010.09.013
- PubMed:
- 21056511
- https://doi.org/10.1016/j.jconhyd.2010.09.013