• Organization: Department of Agriculture
• Updated: 2025-11-21

RETC is a computer program which may be used to analyze the soil water retention and hydraulic conductivity functions of unsaturated soils. These hydraulic properties are key parameters in any...

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• Organization: Department of the Interior
• Updated: 2020-08-26T00:00:00Z

Widespread nitrate contamination of groundwater in agricultural areas poses a major challenge to sustainable water resources. Efficient analysis of nitrate fluxes across large regions also remains...

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• Organization: Department of the Interior
• Updated: 2023-05-24T00:00:00Z

The vadose zone (unsaturated zone) in a soil is of particular interest because it is broadly applicable to desert soils, which are seldom saturated and usually dry. In the absence of strong...

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• Organization: Department of Agriculture
• Updated: 2025-11-21

This database contains measured soil water retention, hydraulic conductivity, and water diffusivity data, as well as pedological information of some 790 soil samples from around the...

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• Organization: Department of Agriculture
• Updated: 2025-11-21

SWMS_3D is a computer program for simulating water and solute movement in three-dimensional variably saturated media. The program numerically solves the Richards' equation for...

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• Organization: Department of the Interior
• Updated: 2021-09-29T00:00:00Z

Sand covers a significant portion of the Earth’s surface, including the Grand Falls area of Coconino County, AZ. The vadose zone (unsaturated zone) in a soil is of particular interest because it...

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• Organization: Department of the Interior
• Updated: 2020-08-21T00:00:00Z

This data release includes the detailed results from laboratory testing of colluvium and landslide deposit specimens collected from coastal bluffs near Mukilteo, Washington. The specimens were...

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• Organization: Department of Agriculture
• Updated: 2024-02-15

The HYDRUS program is a finite element model for simulating the one-dimensional movement of water, heat, and multiple solutes in variably saturated media. The program numerically solves the...

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• Organization: Department of the Interior
• Updated: 2022-01-11T00:00:00Z

Infiltrometers are devices used to measure the infiltration rates of water into soils or porous media (Bouwer, 1986). Cylinder infiltrometers are generally constructed from metal shaped into...

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• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

This data set contains information that can be used to examine water fluxes in soils beneath tree crops in an Amazonian agroforest. The data consists of repeated measurements of soil matrix...

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• Organization: Department of Agriculture
• Updated: 2025-11-21

SWMS_2D is a computer program for simulating water and solute movement in two-dimensional variably saturated media. The program numerically solves the Richards' equation for saturated-unsaturated...

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• Organization: Department of Agriculture
• Updated: 2024-02-15

HYDRUS-1D is a Microsoft Windows-based modeling environment for analysis of water flow and solute transport in variably saturated porous media. The software package includes the one-dimensional...

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• Organization: Department of the Interior
• Updated: 2023-10-16T00:00:00Z

This data release includes time-series, qualitative descriptions, and laboratory testing data from two monitoring stations installed in Puerto Rico following Hurricane Maria in 2017, which led to...

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• Organization: Department of Agriculture
• Updated: 2025-11-22

UNSATCHEM is a software package for simulating water, heat, carbon dioxide and solute movement in one-dimensional variably saturated media. The software consists of the UNSCHEM (version 2.0)...

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• Organization: Department of the Interior
• Updated: 2020-08-27T00:00:00Z

Soil gas methane and combustible gas concentrations collected from oil and gas well pad locations in Utah. Soil gas samples were measured on site and/or collected for later analysis as described...

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• Organization: Department of the Interior
• Updated: 2020-08-27T00:00:00Z

Data provided here describe geochemical correction of carbon-14 in dissolved inorganic carbon (DIC) for groundwater age dating. Datasets include major ion chemistry of groundwater samples, model...

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