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"Viktor O. Polyakov"
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- Author:
- Viktor O. Polyakov, et al. ; C. Jason Williams; Frederick B. Pierson; Osama Z. Al‐Hamdan; S. Kossi Nouwakpo; Justin C. Johnson; Patrick R. Kormos; Scott E. Shaff; Kenneth E. Spaeth; Show all 9 Authors
- Source:
- Ecosphere 2022 v.13 no.6 pp. e4145
- ISSN:
- 2150-8925
- Subject:
- Artemisia; Juniperus; Pinus; basins; canopy; mastication; rain; rainfall simulation; rangelands; runoff; sediment yield; sediments; shrublands; soil; soil erosion models; steppes; topographic slope; trees; woodlands; woody plants
- Abstract:
- ... The transition of sagebrush‐dominated (Artemisia spp.) shrublands to pinyon (Pinus spp.) and juniper (Juniperus spp.) woodlands markedly alters resource‐conserving vegetation structure typical of these landscapes. Land managers and scientists in the western United States need knowledge and predictive tools for assessment and effective targeting of tree‐removal treatments to conserve or restore sag ...
- DOI:
- 10.1002/ecs2.4145
- https://doi.org/10.1002/ecs2.4145
- Author:
- Viktor O. Polyakov, et al. ; Mark A. Nearing; Jeffry J. Stone; Show all 3 Authors
- Source:
- Geoderma 2020 v.361 pp. 114070
- ISSN:
- 0016-7061
- Subject:
- ecosystems; fluid mechanics; overland flow; rain; raindrop impact; rainfall simulation; rangelands; sediment yield; sediments; soil erosion; vegetation; Arizona
- Abstract:
- ... In order to predict and mitigate soil erosion it is necessary to understand the mechanism of detachment by raindrops and by shallow flow. The relative contribution of these drivers to the overall erosion process on arid rangelands is not well understood and field experimental data is limited. The experiment was conducted using simulated rainfall and overland flow on 56 small (2 m × 6 m) natural pl ...
- DOI:
- 10.1016/j.geoderma.2019.114070
- https://doi.org/10.1016/j.geoderma.2019.114070
- Author:
- Viktor O. Polyakov, et al. ; Li Li; Mark A. Nearing; Mary H. Nichols; D. Phillip Guertin; Michelle L. Cavanaugh; Show all 6 Authors
- Source:
- Soil & tillage research 2020 v.198 pp. 104520
- ISSN:
- 0167-1987
- Subject:
- computer software; digital elevation models; geographic information systems; kriging; lidar; rain; rainfall simulation; roughness; stony soils; surface roughness
- Abstract:
- ... Soil surface roughness (SSR) is often calculated based on the Digital Elevation Models (DEMs) obtained by interpolating points from terrestrial LiDAR measurements. This study aimed to investigate the effects of DEM interpolation and interpolation methods on quantification of SSR. A series of rainfall at the intensity of 59 and 178 mm hr⁻¹ were simulated on a 2 by 6.1 m stony soil plot under 12 % a ...
- DOI:
- 10.1016/j.still.2019.104520
- https://doi.org/10.1016/j.still.2019.104520
4. Evolution of rock cover, surface roughness, and its effect on soil erosion under simulated rainfall
- Author:
- Viktor O. Polyakov, et al. ; Li Li; Mark A. Nearing; Mary H. Nichols; Frederick B. Pierson; Michelle L. Cavanaugh; Show all 6 Authors
- Source:
- Geoderma 2020 v.379 pp. 114622
- ISSN:
- 0016-7061
- Subject:
- evolution; fluid mechanics; friction; pavements; rain; rain intensity; rainfall simulation; roughness; runoff; sediments; shear stress; soil erosion; stony soils; surface roughness
- Abstract:
- ... The dynamic interaction between erosion, surface morphology and flow hydraulics, causes steeper slopes to develop greater physical and hydraulic roughness, such that the slope can evolve toward a state of equilibrium wherein runoff velocity is independent of slope gradient. This study tests, under controlled condition, the hypothesis that erosion rate may also evolve toward a state wherein erosion ...
- DOI:
- 10.1016/j.geoderma.2020.114622
- https://doi.org/10.1016/j.geoderma.2020.114622
- Author:
- Viktor O. Polyakov, et al. ; Li Li; Mark A. Nearing; Mary H. Nichols; C. Larrabee Winter; Michelle L. Cavanaugh; Show all 6 Authors
- Source:
- Soil & tillage research 2020 v.200 pp. 104526
- ISSN:
- 0167-1987
- Subject:
- fractal dimensions; lidar; rain; rainfall simulation; rocks; roughness; soil heterogeneity; spatial variation; stony soils; surface roughness; temporal variation; topographic slope; water erosion
- Abstract:
- ... Soil surface roughness (SSR) is widely recognized as an important factor influencing water erosion processes. On semiarid hillslopes with stony soils, rock fragments accumulate as the result of preferential erosion of fine materials, often creating a rough, rocky surface. A series of rainfall events were simulated on a stony plot (2 × 6.1 m) at three slope gradients (5 %, 12 %, and 20 %) and rock ...
- Handle:
- 10113/6775208
- DOI:
- 10.1016/j.still.2019.104526
- https://doi.org/10.1016/j.still.2019.104526
- Author:
- Viktor O. Polyakov, et al. ; Williams C. Jason; Justin C. Johnson; Frederick B. Pierson; Cameron S. Burleson; Patrick R. Kormos; S. Kossi Nouwakpo; Show all 7 Authors
- Source:
- Water 2020 v.12 no.8 pp. -
- ISSN:
- 2073-4441
- Subject:
- Artemisia; Juniperus; Pinus; area; climate; ecosystems; hydraulic conductivity; land use; measurement; mechanical methods; occurrence; prediction; prescribed burning; pretreatment; rangelands; runoff; steppes; topographic slope; trees; vegetation structure; water repellent soils; woodlands; North America
- Abstract:
- ... Pinyon (Pinus spp.) and juniper (Juniperus spp.) woodland encroachment into sagebrush (Artemisia spp.) steppe communities throughout western North America has substantially altered the vegetation structure and hydrologic function of one of the most ecologically important rangeland ecosystems in the world. Various pinyon and juniper tree removal practices are employed to re-establish sagebrush step ...
- Handle:
- 10113/7079807
- DOI:
- 10.3390/w12082213
- https://doi.org/10.3390/w12082213
- Author:
- Viktor O. Polyakov, et al. ; Mark A. Nearing; Shui-qing Yin; Pasquale Borrelli; Show all 4 Authors
- Source:
- Catena 2017 v.157 pp. 357-362
- ISSN:
- 0341-8162
- Subject:
- Revised Universal Soil Loss Equation; Universal Soil Loss Equation; energy; planning; rain; rain intensity; rainfall energy; rill erosion; runoff; storms; teams; variance
- Abstract:
- ... Rainfall erosivity is the capability of rainfall to cause soil loss from hillslopes by water. Modern definitions of rainfall erosivity began with the development of the Universal Soil Loss Equation (USLE), where rainfall characteristics were statistically related to soil loss from thousands of plot-years of natural rainfall and runoff data. USLE erosivity combines the energy of the rainfall and th ...
- Handle:
- 10113/5710221
- DOI:
- 10.1016/j.catena.2017.06.004
- CHORUS:
- 10.1016/j.catena.2017.06.004
- https://doi.org/10.1016/j.catena.2017.06.004
- Author:
- Viktor O. Polyakov, et al. ; Mary H. Nichols; Mark A. Nearing; Mariano Hernandez; Show all 4 Authors
- Source:
- Soil science 2016 v.181 no.7 pp. 275-282
- ISSN:
- 0038-075X
- Subject:
- data collection; geometry; land degradation; mountains; rain; rangelands; runoff; sediment yield; sediments; soil science; watersheds; Arizona
- Abstract:
- ... Rock check dams are used throughout the world to mitigate erosion problems on degraded lands. Many restoration efforts on rangelands in the southwestern United States incorporate such structures; however, their impact on watershed response and channel morphology is not well quantified. In 2008, 37 porous rock structures were built on two small (4.0 and 3.1 ha) instrumented watersheds on an alluvia ...
- DOI:
- 10.1097/SS.0000000000000160
- https://doi.org/10.1097/SS.0000000000000160
- Author:
- Viktor O. Polyakov, et al. ; Teng Feng; Hongsong Chen; Kelin Wang; Xinbao Zhang; Wei Zhang; Show all 6 Authors
- Source:
- Geomorphology 2016 v.253 pp. 217-224
- ISSN:
- 0169-555X
- Subject:
- Revised Universal Soil Loss Equation; basins; cesium; desertification; karsts; land use; overland flow; radionuclides; runoff; seepage; soil erosion; storms; subsurface drainage; China
- Abstract:
- ... Reliable estimation of erosion in karst areas is difficult because of the heterogeneous nature of infiltration and sub-surface drainage. Understanding the processes involved is a key requirement for managing against karst rock desertification. This study used the revised Universal Soil Loss Equation (RUSLE) to estimate the annual soil erosion rates on hillslopes and compared them with 137Cs budget ...
- DOI:
- 10.1016/j.geomorph.2015.10.013
- https://doi.org/10.1016/j.geomorph.2015.10.013
- Author:
- Viktor O. Polyakov, et al. ; Mark A. Nearing; Mary H. Nichols; Mariano Hernandez; Li Li; Ying Zhao; Gerardo Armendariz; Show all 7 Authors
- Source:
- Hydrology and earth system sciences 2017 v.21 no.6 pp. 3221-3229
- ISSN:
- 1607-7938
- Subject:
- hills; hydrologic models; overland flow; rain; rain intensity; rainfall simulation; rainfall simulators; rocks; runoff; stony soils; surface roughness; topographic slope
- Abstract:
- ... Slope–velocity equilibrium is hypothesized as a state that evolves naturally over time due to the interaction between overland flow and surface morphology, wherein steeper areas develop a relative increase in physical and hydraulic roughness such that flow velocity is a unique function of overland flow rate independent of slope gradient. This study tests this hypothesis under controlled conditions ...
- Handle:
- 10113/6472361
- DOI:
- 10.5194/hess-21-3221-2017
- https://doi.org/10.5194/hess-21-3221-2017
- Author:
- Viktor O. Polyakov, et al. ; R. Scott Van Pelt; Shaymonkul X. Hushmurodov; R. Louis Baumhardt; Adrian Chappell; Mark A. Nearing; John E. Strack; Show all 7 Authors
- Source:
- Catena 2017 v.148 pp. 160-167
- ISSN:
- 0341-8162
- Subject:
- cesium; computer simulation; crop rotation; inventories; no-tillage; radionuclides; runoff; sediment yield; sediments; semiarid zones; soil; soil conservation; stubble tillage; terraces; water erosion; wind; wind erosion
- Abstract:
- ... Soil loss due to wind and water erosion degrades the soil on-site and results in environmental problems due to deposition in off-site areas downstream and downwind of the source field. Wind and water erosion may both occur to varying extents particularly in semi-arid environments. Soil conservation strategies require information about the processes of soil redistribution to mitigate its impact. Ho ...
- DOI:
- 10.1016/j.catena.2016.07.004
- https://doi.org/10.1016/j.catena.2016.07.004
- Author:
- Viktor O. Polyakov, et al. ; C. Jason Williams; Frederick B. Pierson; Kenneth E. Spaeth; Joel R. Brown; Osama Z. Al-Hamdan; Mark A. Weltz; Mark A. Nearing; Jeffrey E. Herrick; Jan Boll; Peter R. Robichaud; David C. Goodrich; Philip Heilman; D. Phillip Guertin; Mariano Hernandez; Haiyan Wei; Gerardo Armendariz; Sayjro K. Nouwakpo; Stuart P. Hardegree; Patrick E. Clark; Eva K. Strand; Jonathan D. Bates; Loretta J. Metz; Mary H. Nichols; Show all 24 Authors
- Source:
- Rangelands 2016 v.38 no.6 pp. 379-388
- ISSN:
- 0190-0528
- Subject:
- Artemisia; Juniperus; basins; conservation practices; decision making; ecological site descriptions; ecosystems; evaporation; financial economics; land use; landscapes; models; plant communities; prediction; range management; rangelands; runoff; soil; steppes; topographic slope; trees; watersheds; wind erosion
- Abstract:
- ... The utility of ecological site descriptions (ESD) in the management of rangelands hinges on their ability to characterize and predict plant community change, the associated ecological consequences, and ecosystem responsiveness to management. We demonstrate how enhancement of ESDs with key ecohydrologic information can aid predictions of ecosystem response and targeting of conservation practices fo ...
- Handle:
- 10113/5695467
- DOI:
- 10.1016/j.rala.2016.10.004
- https://doi.org/10.1016/j.rala.2016.10.004