Macropore Flow as a Groundwater Component in Hydrologic Simulation:Modelling, Applications and Results

Kumar, M. Ranjit; Meenambal, T.; Kumar, Vinod

doi:10.18520/cs/v112/i06/1197-1207

Cited by 4 publications

(2 citation statements)

References 50 publications

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“…However, the average annual cumulative loss load was significant, reaching up to 54.6 kg*ha À1 *yr À1 . This is mainly due to the abundance of pores in the cultivated layers of purple soil, which provided channels for preferred flow and sediment migration (Gachter et al 2004;Kumar et al 2017). During the rainfall process, raindrops eroded the soil, causing the soil aggregates to break into fine particles (Ramos et al 2007), resulting in erosion and sediment yield by runoff transport (Shen et al 2016).…”

Section: Discussionmentioning

confidence: 99%

Effect of natural rainfall on the migration characteristics of runoff and sediment on purple soil sloping cropland during different planting stages

Wang

et al. 2021

Journal of Water and Climate Change

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Due to the difficulty in monitoring subsurface runoff and sediment migration, their loss loads are still not clear and need further study. This study monitored water and soil loss occurring within experimental field plots for two calendar years under natural rainfall events. The sediment loss load was quantified by considering the corresponding water flow flux and its sediment concentration. The results showed that 60.04% of the runoff and 2.83% of the sediment were lost underground. The annual underground sediment loss reached up to 54.6 kg*ha−1*yr−1. A total of 69.68% of the runoff yield and 67.25% of the sediment yield were produced during the corn planting stage (CPS: March–July). Heavy rain and torrential rain events produced 94.45%, 65.46% of the annual runoff and 94.45%, 76.21% of the sediment yields during the corn-planting stage and summer fallow period (SFP: August–September). The rain frequency, rainfall, and rainfall duration of each planting stage significantly affected the resulting runoff and sediment yield. Measures aimed at the prevention and control of water-soil loss from purple soil sloping land should heavily focus on torrential rain and heavy rain events during the CPS and SFP. This paper aims to provide a practical reference for quantifying the water and soil loss from purple soil sloping cropland.

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Section: Discussionmentioning

confidence: 99%

Effect of natural rainfall on the migration characteristics of runoff and sediment on purple soil sloping cropland during different planting stages

Wang

et al. 2021

Journal of Water and Climate Change

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“…Results showed that total porosity was similar at all investigated locations. However, total porosity does not give data on the presence and architecture of micro-, meso-, and macropores which can cause differences in water and solute transport through the soil, and it is known that macropores have a big influence on increased water flow in soil [70]. It is also established that as bulk density increases, the K s decreases [71,72].…”

Section: Variability Of Soil Hydraulic Parameters and Layering Impactmentioning

confidence: 99%

Determination of Soil Hydraulic Parameters and Evaluation of Water Dynamics and Nitrate Leaching in the Unsaturated Layered Zone: A Modeling Case Study in Central Croatia

et al. 2021

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Nitrate leaching through soil layers to groundwater may cause significant degradation of natural resources. The aims of this study were: (i) to estimate soil hydraulic properties (SHPs) of the similar soil type with same management on various locations; (ii) to determine annual water dynamics; and (iii) to estimate the impact of subsoil horizon properties on nitrate leaching. The final goal was to compare the influence of different SHPs and layering on water dynamics and nitrate leaching. The study was conducted in central Croatia (Zagreb), at four locations on Calcaric Phaeozem, Calcaric Regosol, and Calcaric Fluvic Phaeozem soil types. Soil hydraulic parameters were estimated using the HYPROP system and HYPROP-FIT software. Water dynamics and nitrate leaching were evaluated using HYDRUS 2D/3D during a period of 365 days. The amount of water in the soil under saturated conditions varied from 0.422 to 0.535 cm3 cm–3 while the hydraulic conductivity varied from 3 cm day−1 to 990.9 cm day−1. Even though all locations have the same land use and climatic conditions with similar physical properties, hydraulic parameters varied substantially. The amount and velocity of transported nitrate (HYDRUS 2D/3D) were affected by reduced hydraulic conductivity of the subsoil as nitrates are primarily transported via advective flux. Despite the large differences in SHPs of the topsoil layers, the deeper soil layers, having similar SHPs, imposed a buffering effect preventing faster nitrate downward transport. This contributed to a very similar distribution of nitrates through the soil profile at the end of simulation period. This case study indicated the importance of carefully selecting relevant parameters in multilayered soil systems when evaluating groundwater pollution risk.

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Estimation of vineyard soil structure and preferential flow using dye tracer, X-ray tomography, and numerical simulations

et al. 2020

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Macropore Flow as a Groundwater Component in Hydrologic Simulation:Modelling, Applications and Results

Cited by 4 publications

References 50 publications

Effect of natural rainfall on the migration characteristics of runoff and sediment on purple soil sloping cropland during different planting stages

Effect of natural rainfall on the migration characteristics of runoff and sediment on purple soil sloping cropland during different planting stages

Determination of Soil Hydraulic Parameters and Evaluation of Water Dynamics and Nitrate Leaching in the Unsaturated Layered Zone: A Modeling Case Study in Central Croatia

Estimation of vineyard soil structure and preferential flow using dye tracer, X-ray tomography, and numerical simulations

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