Measuring Water Transmission Parameters in Vadose Zone Using Ponded Infiltration Techniques

The flow of soil water is characterized by water transmission parameters, field-saturated hydraulic conductivity, matric flux potential and sorptivity. Soil water flow is, in turn, the primary mechanism by which soil contaminants, such as excess plant nutrient, bacteria, viruses, salts, and industrial chemicals are transported. Consequently, knowledge of soil water transmission parameters is essential for understanding, preventing and remediating the contamination of soil water and ground water. This paper describes steady-state and transient methods for obtaining soil water transmission parameters from ponded infiltration under constant head and falling head conditions in surface rings and shallow auger holes. Also discussed are the conditions under which the various methods are most appropriate.

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Quasi 3D modelling of vadose zone soil-water flow for optimizing irrigation strategies: Challenges, uncertainties and efficiencies

Environmental Modelling & Software ◽

10.1016/j.envsoft.2017.03.008 ◽

2017 ◽

Vol 93 ◽

pp. 59-77 ◽

Cited By ~ 3

Author(s):

Meisam Rezaei ◽

Jan De Pue ◽

Piet Seuntjens ◽

Ingeborg Joris ◽

Wim Cornelis

Keyword(s):

Soil Water ◽

Water Flow ◽

Vadose Zone ◽

3D Modelling ◽

Soil Water Flow

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Effect of Organic Matter and Initial Moisture Content on Water Transmission Characteristics of Alfisols of Assam

Agropedology ◽

10.47114/j.agroped.2017.jun5 ◽

2019 ◽

Vol 27 (1) ◽

Author(s):

M. K. Nayak ◽

◽

D. K. Patgiri ◽

T. C. Baruah ◽

◽

...

Keyword(s):

Organic Matter ◽

Moisture Content ◽

Soil Water ◽

Initial Moisture Content ◽

Mean Diffusivity ◽

Wetting Front ◽

Transmission Parameters ◽

Increase With Increase ◽

Water Diffusivity ◽

Water Transmission

A study was conducted to study the effect of organic matter and initial moisture content on water transmission behaviour of three texturally different Alfisols. Saturated hydraulic conductivity showed a variable increase with increase in organic matter. Soil water diffusivity D (θ) showed an irregular trend with increasing levels of organic matter while sorptivity (s) increased with increasing levels of organic matter, penetrability (P) of wetting front decreased. Weighted mean diffusivity did not show any particular trend amongst the treatments, however, it was found to be higher in treated soils as compared to untreated control. Specific water capacity increased with increasing levels of organic matter, while capillary conductivity (k) did not show any definite trend. All the water transmission parameters except sorptivity were found to be increased with an increase in initial moisture content. Diffusivity was in general higher at lower initial moisture content indicating that soil water diffusivity was greatly influenced by initial moisture content. Prediction of D (θ) was, by and large, satisfactory in coarse textured soils and inconclusive in case of K (θ) relation in most of the soils.

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Evaluation of porous cup soil-water extractors: Physical factors

Soil Research ◽

10.1071/sr9790417 ◽

1979 ◽

Vol 17 (3) ◽

pp. 417 ◽

Cited By ~ 20

Author(s):

T Talsma ◽

PM Hallam ◽

RS Mansell

Keyword(s):

Soil Water ◽

Flow Distribution ◽

Water Entry ◽

Limiting Factors ◽

Physical Factors ◽

Transmission Properties ◽

Soil Water Flow ◽

Flow Impedance ◽

Water Transmission ◽

Flux Limiting

The performance and characteristics of small, porous cup, soil-water extractors, installed in a soil with known water-transmission properties, are described. Cup conductivities decreased sharply during an 8 week period and, in the absence of other flux limiting factors, would limit water entry in the permeable topsoil but not in the slowly permeable subsoil. Measured cup water uptake however was much less than that predicted from either cup conductivity or soil water transmission properties. This is attributed to flow impedance near the cup walls. Under these conditions flow distribution in a soil with extractor cups would be much closer to that of an unextracted soil than is predicted from soil water flow theory.

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Soil water flow due to surface topography in research drainage plots

age ◽

10.1002/agg2.20128 ◽

2020 ◽

Vol 3 (1) ◽

Author(s):

Sally Logsdon ◽

Cindy Cambardella

Keyword(s):

Surface Topography ◽

Soil Water ◽

Water Flow ◽

Soil Water Flow

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Heterogeneous soil water flow and macropores described with combined tracers of dye and iodine

Journal of Hydrology ◽

10.1016/j.jhydrol.2010.11.037 ◽

2011 ◽

Vol 397 (1-2) ◽

pp. 105-117 ◽

Cited By ~ 22

Author(s):

Kang Wang ◽

Renduo Zhang

Keyword(s):

Soil Water ◽

Water Flow ◽

Soil Water Flow ◽

Heterogeneous Soil

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Water Distribution from Artificial Recharge via Infiltration Basin under Constant Head Conditions

Water ◽

10.3390/w13081052 ◽

2021 ◽

Vol 13 (8) ◽

pp. 1052

Author(s):

Tiansong Qi ◽

Longcang Shu ◽

Hu Li ◽

Xiaobo Wang ◽

Yanqing Men ◽

...

Keyword(s):

Vadose Zone ◽

Water Distribution ◽

Artificial Recharge ◽

Buffer Zone ◽

Experimental Conditions ◽

Correlation And Regression Analysis ◽

Infiltration Basin ◽

Constant Head ◽

3D Software

The vadose zone plays a significant role during artificial recharge via the infiltration basin. Its thickness, lithology, heterogeneity, among others greatly affect the recharge efficiency. The main objective of this research is to establish the role of the vadose zone and the impacts of infiltration basin features and vadose zone factors on water distributions. In this work, an ideal conceptual model was considered, and mathematical models were built using HYDRUS (2D/3D) software package version 2.05. A total of 138 numerical experiments were implemented under seven types of experimental conditions. The experimental data were analyzed with the aid of correlation and regression analysis. The results showed that infiltration basin features and vadose zone factors had various impacts on water distribution, low permeability formation had various effects on evaporation depending on its depth, and there were consistent, similar, or different variation trends between infiltration and recharge. In conclusion, it is recommended that when the vadose zones are to be chosen as an infiltration basin site, the trade-off among the infiltration, recharge, storage, and evaporation should be seriously considered. This paper may contribute to a better understanding of the vadose zone as a buffer zone for artificial recharge.

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