Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Typical Model Studies01:30

Typical Model Studies

466
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
466
Boundary Layer Characteristics01:18

Boundary Layer Characteristics

254
When a fluid encounters a solid surface, a boundary layer forms due to the interaction between the fluid's motion and the stationary surface. This phenomenon is characterized by a thin region adjacent to the surface where viscous forces dominate, influencing the fluid's velocity profile. The development of the boundary layer begins at the leading edge of the surface and evolves as the fluid moves downstream.As the fluid flows over the surface, friction between the fluid and the wall slows down...
254
Precipitation Processes01:12

Precipitation Processes

679
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
679
Theories of Dissolution: Diffusion Layer Model01:15

Theories of Dissolution: Diffusion Layer Model

1.1K
Dissolution, the process by which drug particles dissolve in a solvent, is explained by the diffusion layer model, a theoretical framework that simulates the absorption of oral drugs and allows us to analyze experimental data.
This process starts with a thin layer, saturated with the drug, forming at the interface between the solid and liquid. The solute then diffuses from this layer into the main solution. The Noyes-Whitney equation suggests that the rate of dissolution relies on the diffusion...
1.1K
Moisture Content and Bulking of Aggregate01:10

Moisture Content and Bulking of Aggregate

239
The moisture content of aggregates is a crucial factor in construction, particularly in concrete mixing, as it influences the total water required in the mix. Moisture content represents the water coated on the exterior surface of the aggregate existing in a saturated and surface-dry condition. The total water content of a moist aggregate is the sum of its moisture content and water absorption.
When aggregates are exposed to rain or sit in stockpiles, they absorb moisture, which must be...
239
Precipitation Gravimetry01:03

Precipitation Gravimetry

8.0K
Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
8.0K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Regulating the Adsorption Configuration of Intermediates to Construct C─N Bonds From CO<sub>2</sub> for High-Efficiency N,N-Dimethylformamide Electrosynthesis.

Angewandte Chemie (International ed. in English)·2026
Same author

Mechanisms, injury patterns, and kinematic features of hamstring strain injuries in football (soccer): a systematic review and meta-analysis of video-analysis studies.

Frontiers in public health·2026
Same author

Association between C-reactive protein-triglyceride glucose related indices and all-cause and cardiovascular mortality in individuals with cardiovascular-kidney-metabolic syndrome.

Cardiovascular diabetology·2026
Same author

Effects of Multicomponent Digital Health Interventions on Multidimensional Physical Activity in Older Adults: Systematic Review, Meta-Analysis, and Meta-Regression of Randomized Controlled Trials.

Journal of medical Internet research·2026
Same author

Comparative efficacy of different mind-body exercises on functional capacity and quality of life in patients with chronic heart failure: a systematic review and network meta-analysis.

Frontiers in public health·2026
Same authorSame journal

Evaluation of hydrological models at gauged and ungauged basins using machine learning-based limits-of-acceptability and hydrological signatures.

Journal of hydrology·2026
Same journal

A Watershed-Scale Multi-Approach Assessment of Design Flood Discharge Estimates used in Hydrologic Risk Analyses for Forest Road Stream Crossings and Culverts.

Journal of hydrology·2026
Same journal

Nitrate sources and transformations in a river-reservoir system: Response to extreme flooding and various land use.

Journal of hydrology·2025
Same journal

Aquifer system deformation in the San Luis Valley: A new framework for modeling subsidence in agricultural regions.

Journal of hydrology·2025
Same journal

Uncovering the hidden world of riverbed sediments: The role of sediment heterogeneity and cross-bar channel fills in the hydrogeochemical dynamics of the hyporheic zone.

Journal of hydrology·2025
Same journal

Hydrologic responses to wildfires in western Oregon, USA.

Journal of hydrology·2025
See all related articles

Related Experiment Video

Updated: Oct 7, 2025

Exploring the Effects of Atmospheric Forcings on Evaporation: Experimental Integration of the Atmospheric Boundary Layer and Shallow Subsurface
13:27

Exploring the Effects of Atmospheric Forcings on Evaporation: Experimental Integration of the Atmospheric Boundary Layer and Shallow Subsurface

Published on: June 8, 2015

8.9K

A two-layer numerical model of soil moisture dynamics: Model development.

Junhao He1, Mohamed M Hantush2, Latif Kalin1

  • 1School of Forestry and Wildlife Sciences, 602 Duncan Drive, Auburn, AL 36849, USA.

Journal of Hydrology
|January 6, 2022
PubMed
Summary
This summary is machine-generated.

This study introduces a new two-layer model to simulate soil moisture flow, simplifying Richards

Keywords:
EvapotranspirationModelRichards equationRoot zoneSoil moistureVadose soil

More Related Videos

Author Spotlight: Advancing Agricultural Land Ecosystem Research with a Hydraulic Property Analyzer to Assess Soil Health
07:21

Author Spotlight: Advancing Agricultural Land Ecosystem Research with a Hydraulic Property Analyzer to Assess Soil Health

Published on: August 9, 2024

1.1K
In Situ Soil Moisture Sensors in Undisturbed Soils
08:20

In Situ Soil Moisture Sensors in Undisturbed Soils

Published on: November 18, 2022

6.7K

Related Experiment Videos

Last Updated: Oct 7, 2025

Exploring the Effects of Atmospheric Forcings on Evaporation: Experimental Integration of the Atmospheric Boundary Layer and Shallow Subsurface
13:27

Exploring the Effects of Atmospheric Forcings on Evaporation: Experimental Integration of the Atmospheric Boundary Layer and Shallow Subsurface

Published on: June 8, 2015

8.9K
Author Spotlight: Advancing Agricultural Land Ecosystem Research with a Hydraulic Property Analyzer to Assess Soil Health
07:21

Author Spotlight: Advancing Agricultural Land Ecosystem Research with a Hydraulic Property Analyzer to Assess Soil Health

Published on: August 9, 2024

1.1K
In Situ Soil Moisture Sensors in Undisturbed Soils
08:20

In Situ Soil Moisture Sensors in Undisturbed Soils

Published on: November 18, 2022

6.7K

Area of Science:

  • Environmental science
  • Soil physics
  • Hydrology

Background:

  • Simulating water moisture flow in variably saturated soils is complex due to the nonlinear nature of Richards' equation.
  • Shallow water tables exacerbate these challenges in soil moisture dynamics.

Purpose of the Study:

  • To develop and validate a simplified two-layer model for simulating vertically-averaged soil moisture flow.
  • To address the challenges posed by Richards' equation in variably saturated soils with shallow water tables.

Main Methods:

  • Derived a two-layer approximation of Richards' equation, converting the PDE into coupled ODEs.
  • Numerically solved the coupled ODEs using the iterative Huen's method.
  • Validated the model against HYDRUS-1D for various soil textures and boundary conditions.

Main Results:

  • The two-layer model demonstrated numerical stability and accuracy in simulating soil moisture content and flux.
  • The model effectively tracked soil moisture variations under different atmospheric and boundary conditions.
  • A simulation of a declining water table showed the model's robustness in dynamic desaturation scenarios.

Conclusions:

  • The developed two-layer model offers a computationally efficient alternative for simulating soil moisture dynamics.
  • This model is suitable for research in wetlands and for water resource planning, aiding in land-surface and groundwater integration.
  • It supports the management of conjunctive use of surface and groundwater resources.