Related topics: climate change · drought

AI magic bean could save farmers millions

Farmers across the world could jack up giant profits using an Artificial Intelligence soil monitoring system developed at Brunel University London.

NASA soil data joins the Air Force

Getting stuck on a muddy road is a hassle for anyone, but for the U.S. Army it could be far more serious—a matter of life and death in some parts of the world. That's one of the reasons the U.S. Air Force HQ 557th Weather ...

Video: SMOS 10 years in orbit

The ESA's Soil Moisture and Ocean Salinity (SMOS) satellite has been in orbit for a decade. This remarkable satellite has not only exceeded its planned life in orbit, but also surpassed its original scientific goals. It was ...

Tracking Typhoon Hagibis from space

Hagibis was the biggest typhoon to hit Japan in decades. With extreme events like this likely to increase in number and in severity as a consequence of climate change, satellites are playing an increasingly important role ...

Satellite data can reveal fire susceptibility in peatlands

When large areas of carbon-rich soil catch fire, the blaze emits massive amounts of carbon into the atmosphere and creates a thick haze. These blazes can usher in long-term climate impacts that affect the whole planet and ...

Satellites reveal peatland fire susceptibility

When large areas of carbon-rich soil catch fire, the blaze emits massive amounts of carbon into the atmosphere and creates a thick haze some residents of Southeast Asia know all too well. In 2015, the haze from peatland fires ...

The Australian winter was dry, the spring will likely be dry

Winter still has a few days to run, but it's highly likely to be one of Australia's warmest and driest on record. While final numbers will be crunched once August ends, this winter will probably rank among the top ten warmest ...

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Water content

Water content or moisture content is the quantity of water contained in a material, such as soil (called soil moisture), rock, ceramics, or wood on a volumetric or gravimetric basis. The property is used in a wide range of scientific and technical areas, and is expressed as a ratio, which can range from 0 (completely dry) to the value of the materials' porosity at saturation.

Volumetric water content, θ, is defined mathematically as:

where Vw is the volume of water and VT = Vs + Vv = Vs + Vw + Va is the total volume (that is Soil Volume + Water Volume + Void Space). Water content may also be based on its mass or weight, thus the gravimetric water content is defined as:

where mw is the mass of water and mb (or ms for soil) is the bulk material mass. To convert gravimetric water content to volumetric water, multiply the gravimetric water content by the bulk specific gravity of the material.

This text uses material from Wikipedia, licensed under CC BY-SA