Water content
hideWater 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.
For more information about Water content, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
News tagged with soil moisture
New Method to Measure Snow, Soil Moisture With GPS May Benefit Meteorologists, Farmers
Space & Earth / Earth Sciences
Nov 20, 2009 |
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(PhysOrg.com) -- A research team led by the University of Colorado at Boulder has found a clever way to use traditional GPS satellite signals to measure snow depth as well as soil and vegetation moisture, a technique expected ...
SMOS satellite instrument comes alive (w/ Video)
Space & Earth / Space Exploration
Nov 19, 2009 |
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The MIRAS instrument on ESA's SMOS satellite, launched earlier this month, has been switched on and is operating normally. MIRAS will map soil moisture and ocean salinity to improve our understanding of the ...
Seeing stars, Proba-2 platform passes its first health check
Space & Earth / Space Exploration
Nov 11, 2009 |
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(PhysOrg.com) -- Into its second week in orbit, Proba-2's spacecraft platform has proven to be in excellent health. This leaves the way clear for commissioning the many new technology payloads aboard the mini-satellite, ...
SMOS, Proba-2: Two new ESA satellites successfully lofted into orbit (w/ Video)
Space & Earth / Space Exploration
Nov 02, 2009 |
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(PhysOrg.com) -- The second satellite in ESA's Earth Explorer series - the Soil Moisture and Ocean Salinity (SMOS) mission - and the second demonstration satellite under ESA's Project for Onboard Autonomy ...
Soil moisture and ocean salinity satellite ready for launch
Space & Earth / Earth Sciences
Oct 29, 2009 |
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A new European Earth observation satellite will be launched in the early hours of Monday morning (2 November 2009) from the Plesetsk Cosmodrome in northern Russia.
SMOS and Proba-2 satellites installed in launch tower
Space & Earth / Space Exploration
Oct 28, 2009 |
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(PhysOrg.com) -- In readiness for launch on 2 November, ESA’s SMOS and Proba-2 satellites - encapsulated in the launcher fairing - have been transported from the cleanroom and installed in the launch tower ...
Final look at ESA's SMOS and Proba-2 satellites
Space & Earth / Space Exploration
Oct 21, 2009 |
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As preparations for the launch of SMOS and Proba-2 continue on schedule, the engineers and technicians at the Russian launch site say goodbye as both satellites are encapsulated within the half-shells of the ...
A tree's response to environmental changes: What can we expect over the next 100 years?
Oct 07, 2009 |
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The many environmental issues facing our society are prevalent in the media lately. Global warming, rainforest devastation, and endangered species have taken center stage. Our ecosystem is composed of a very delicate network ...
Satellite data instrumental in combating desertification
Space & Earth / Earth Sciences
Oct 07, 2009 |
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With land degradation in dryland regions continuing to worsen, the UN Convention to Combat Desertification has agreed on scientist-recommended indicators for monitoring and assessing desertification that signatory ...
UA developing network to improve weather forecasting
Space & Earth / Earth Sciences
Sep 22, 2009 |
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An interdisciplinary team of University of Arizona researchers is building a network of soil moisture probes to improve short-term and seasonal weather forecasting.
SMOS arrives safely at Russian launch site
Space & Earth / Space Exploration
Sep 18, 2009 |
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After leaving Thales Alenia Space in the south of France on 15 September, ESA’s SMOS Earth Explorer has arrived safely at the Plesetsk Cosmodrome in northern Russia, where it will be prepared for launch on ...
Weaknesses in dikes detected by space tech spin-off
Space & Earth / Earth Sciences
Sep 04, 2009 |
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A company from one of ESA's Business Incubation Centres has used space technology to develop a scanner to spot weaknesses in dike structures. It is being used to inspect dikes and dams on the Danube river ...
Water webs connect spiders, residents in Southwest
Jun 25, 2009 |
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(PhysOrg.com) -- If you are a cricket and it is a dry season on the San Pedro River in Arizona, on your nighttime ramblings to eat leaves, you are more likely to be ambushed by thirsty wolf spiders, or so ...
SMOS and Proba-2 launch rescheduled for November (w/Video)
Space & Earth / Space Exploration
Jun 22, 2009 |
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Following an agreement between ESA, Krunichev Space Centre and Eurockot Launch Services, ESA's next Earth Explorer mission SMOS and a secondary payload, the technology demonstrator Proba-2 satellite, will ...
Rainforest rehab in every sense
Jun 12, 2009 |
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Sophisticated sensors that measure leaf wetness, soil moisture and temperature are helping rehabilitate rainforest in the Springbrook World Heritage precinct in south-east Queensland.
