Hydropedology: Interactions between pedologic and hydrologic processes across spatiotemporal scales

Yu, Jun; Li, Xiao yan; Guo, Li; Lin, Henry

doi:10.1016/j.earscirev.2017.05.014

Cited by 52 publications

(32 citation statements)

References 102 publications

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“…The knowledge of soil and water interaction is very important for evaluating the soil's role in water quantity and quality and the water's role in soil quantity and quality [65]. Soil architecture across microscopic to megascopic scales largely controls soil hydraulic properties and water infiltration processes [1,2]. In our study, an in-depth understanding of soil hydraulic properties in real soil-landscape systems explicitly reflects the universal heterogeneity of soil architecture in nature from an aspect of the soil-water feedback response.…”

Section: Discussionmentioning

confidence: 99%

“…The knowledge of soil hydraulic properties, including hydraulic conductivity and water retention, is of great importance for understanding hydrological responses such as water infiltration, surface runoff, and water storage. Soil architecture refers to the organization of soil from the microscopic to the megascopic scales and encompasses three interlinked components (solid components, pore space, and their interfaces) at each scale [1,2]. It is commonly recognized by two general categories: (1) soil architecture within a soil profile, such as mineral structure, aggregates, soil horizons, and pedons; and (2) soil architecture in the landscape including soil catena, soilscape, soil sequence, and pedosphere.…”

Section: Introductionmentioning

confidence: 99%

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Hydraulic Properties in Different Soil Architectures of a Small Agricultural Watershed: Implications for Runoff Generation

Dai

Wang

Zhou

et al. 2019

Water

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Soil architecture exerts an important control on soil hydraulic properties and hydrological responses. However, the knowledge of hydraulic properties related to soil architecture is limited. The objective of this study was to investigate the influences of soil architecture on soil physical and hydraulic properties and explore their implications for runoff generation in a small agricultural watershed in the Three Gorges Reservoir Area (TGRA) of southern China. Six types of soil architecture were selected, including shallow loam sandy soil in grassland (SLSG) and shallow loam sandy soil in cropland (SLSC) on the shoulder; shallow sandy loam in grassland (SSLG) and shallow sandy loam in cropland (SSLC) on the backslope; and deep sandy loam in grassland (DSLG) and deep sandy loam in cropland (DSLC) on the footslope. The results showed that saturated hydraulic conductivity (K sat ) was significantly higher in shallow loamy sand soil under grasslands (8.57 cm h −1 ) than under croplands (7.39 cm h −1 ) at the topsoil layer. Total porosity was highest for DSLC and lowest for SSLG, averaged across all depths. The proportion of macropores under SLSG was increased by 60% compared with under DSLC, which potentially enhanced water infiltration and decreased surface runoff. The landscape location effect showed that at the shoulder, K sat values were 20% and 47% higher than values at the backslope and footslope, respectively. It was inferred by comparing K sat values with 30 min maximum rainfall intensity at the watershed, that surface runoff would be generated in SSLC, DSLG, and DSLC sites by storms, but that no overland flow is generated in both sites at the shoulder and SSLG. The significantly higher K sat under grasslands in comparison to croplands at the backslope indicated that planting grasses would increase infiltration capacity and mitigate runoff generation during storm events. The findings demonstrated that croplands in footslope positions might be hydrologically sensitive areas in this small agricultural watershed.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydraulic Properties in Different Soil Architectures of a Small Agricultural Watershed: Implications for Runoff Generation

Dai

Wang

Zhou

et al. 2019

Water

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“…Bounded devices have a specific surface that is used to assess the soil erodibility, while the unbounded devices measure the amount of sediment that is received in the form of splashed sediment from the (unbounded) surrounding area. The unbounded devices that were selected for this study were: the funnel [35], the cup [36,37], and the gutter [38]. Another unbounded device, the tower of funnels, was also included in this research, although it has never been used before due to the different structure and data that can be obtained.…”

mentioning

confidence: 99%

Comparative Analysis of Splash Erosion Devices for Rainfall Simulation Experiments: A Laboratory Study

Fernández‐Raga

Campo

Rodrigo‐Comino

et al. 2019

Water

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For the study of soil erosion it is important to set up the experiments well. In the experimental design one of the key factors is the choice of the measurement device. This is especially important when one part of the erosion process needs to be isolated, such as for splash erosion. Therefore, the main aim of this research is to list the general characteristics of the commonly used splash erosion devices and to discuss the performance, to be able to relate them, and make suggestions regarding their use. The devices we selected for this comparative comparison were: the splash cup, funnel, Morgan tray, Tübingen cup, tower, and the gutter. The devices were tested under the same conditions (rainfall characteristics, slope, and soil type) to assess their hydrological response under different intensities of simulated rainfall. All devices were installed on a sloping plot (10°) with sandy soil, and were exposed to 10 min. of simulated rain with intensities ranging from 60 to 172 mm/h to measure the splashed sediment, and to describe problems and differences among them. The results showed that the Tübingen cup was the best performing device to measure kinetic energy of the rain, but, because of its design, it is not possible to measure the detached splashed sediment under natural (field) conditions. On the other hand, the funnel device showed a significant relation with rain intensity because it loses little sediment to washing. In addition, the device is easy to use and cheap. Therefore, this device is highly recommended to estimated splash erosion. to the good performance measuring the actual splash erosion, because it loses little sediment by washing. The device is also cheap and easy to install and manage.

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“…All of these descriptions are variable in time and space, yet the range may be restricted based on location and time. They are important controls on various biological, physical and chemical processes in the earth's critical zone (Vereecken et al, 2008;Lin et al, 2015;Ma et al, 2017). Therefore, intensive studies have been directed to observe, predict and explain variations in soil water processes across temporal and spatial scales.…”

Section: Soil Water Processesmentioning

confidence: 99%

Coupling soil water processes and the nitrogen cycle across spatial scales: Potentials, bottlenecks and solutions

Zhu

Castellano

Gao

2018

Earth-Science Reviews

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Interactions among soil water processes and the nitrogen (N) cycle govern biological productivity and environmental outcomes in the earth's critical zone. Soil water influences the N cycle in two distinct but interactive modes. First, the spatio-temporal variation of soil water content (SWC) controls redox coupling among oxidized and reduced compounds, and thus N mineralization, nitrification, and denitrification. Secondly, subsurface flow controls the movement of water and dissolved N. These two processes interact such that subsurface flow dynamics control the occurrence of relatively static, isolated soil solution environments that span a range of reduced to oxidized conditions. However, the soil water-N cycle is usually treated as a black box. Models focused on N cycling simplify soil water parameters, while models focused on soil water processes simplify N cycling parameters. In addition, effective ways to deal with upscaling are lacking. New techniques will allow comprehensive coupling of the soil water-N cycle across time and space: 1) using hydrogeophysical tools to detect soil water processes and then linked to electrochemical N sensors to reveal the soil N cycle, (2) upscaling small-scale observations and simulations by constructing functions between soil water-N cycle and ancillary soil, topography and vegetation variables in the hydropedological functional units, and (3) integrating soil hydrology models with N cycling models to minimize the oversimplification of N biogeochemistry and soil hydrology mechanisms in these models. These suggestions will enhance our understanding of soil water processes and the N cycle and improve modeling of N losses as important sources of greenhouse gas emission and water pollution.

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Hydropedology: Interactions between pedologic and hydrologic processes across spatiotemporal scales

Cited by 52 publications

References 102 publications

Hydraulic Properties in Different Soil Architectures of a Small Agricultural Watershed: Implications for Runoff Generation

Hydraulic Properties in Different Soil Architectures of a Small Agricultural Watershed: Implications for Runoff Generation

Comparative Analysis of Splash Erosion Devices for Rainfall Simulation Experiments: A Laboratory Study

Coupling soil water processes and the nitrogen cycle across spatial scales: Potentials, bottlenecks and solutions

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