Navigation Links
Are existing large-scale simulations of water dynamics wrong?
Date:3/10/2008

MADISON, WI -- Soils are complicated porous media that are highly relevant for the sustainable use of water resources. Not only the essential basis for agriculture, soils also act as a filter for clean drinking water, and, depending on soil properties, they dampen or intensify surface runoff and thus susceptibility to floods. Moreover, the interaction of soil water with the atmosphere and the related energy flux is an important part of modern weather and climate models.

An accurate modeling of soil water dynamics thus has been an important research challenge for decades, but the prediction of water movement, especially at large spatial scales, is complicated by the heterogeneity of soils and the sometimes complicated topography.

Simulation models are typically based on Richards' equation, a nonlinear partial differential equation, which can be solved using numerical solution methods. A prerequisite of most solution algorithms is the partitioning of the simulated region into discrete grid cells. For any fixed region, such as a soil profile, a hill slope, or an entire watershed, the grid resolution is usually limited by the available computer power. But how does this grid resolution affect the quality of the solution"

This problem was explored by Hans-Joerg Vogel from the UFZ - Helmholtz Center of Environmental Research in Leipzig, Germany and Olaf Ippisch from the Institute for Parallel and Distributed Systems of the University of Stuttgart, Germany. The results are published in the article "Estimation of a Critical Spatial Discretization Limit for Solving Richards' Equation at Large Scales," Vadose Zone J. Vol. 7, p. 112-114, in the February 2008 issue of Vadose Zone Journal.

Vogel and Ippisch found that the critical limit for the spatial resolution can be estimated based on more easily available soil properties: the soil water retention characteristic. Most importantly, this limit came out to be on the order of decimeters fo
'/>"/>

Contact: Sara Uttech
suttech@soils.org
608-268-4948
Soil Science Society of America
Source:Eurekalert

Page: 1 2

Related biology news :

1. Stanfords nanowire battery holds 10 times the charge of existing ones
2. Titanium Group Signs Letter of Intent to Acquire Multimilion Dollar Medical Software Company and Its Existing Sales Network
3. Titanium Group Signs Letter of Intent to Acquire Multimilion Dollar Medical Software Company and Its Existing Sales Network
4. Texas Hospital nations first to use large-scale cocoon strategy against whooping cough
5. Microarray sequence capture speeds large-scale resequencing of targeted genomic regions
6. Computer simulations point to key molecular basis of cystic fibrosis
7. Dissolved organic matter in the water column may influence coral health
8. Why juniper trees can live on less water
9. Exeter scientists pour cold water on EU bird policy
10. Bacteria and nanofilters -- the future of clean water technology
11. Salamanders, headwater streams critical in food chain
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/17/2015)... June 17, 2015  Crossmatch™, a leading provider ... its U.are.U ® 4500 fingerprint readers have ... Eateries, Inc., a San Jose, CA ... increase security, improve accountability and reduce fraud at ... non-repudiable identity confirmation for employee sign in and ...
(Date:6/15/2015)... According to a new market research report ... Hybrid), Technologies (Recognition, IVR, OCR, Pattern & Image Recognition) ... Natural Language Processing Market is expected to grow to ... forecast period 2015-2020. Browse 65 market ...   through 155 P ages and in-depth TOC ...
(Date:6/10/2015)... According to a new ... (Ultrasound, TOF, Structured Light, Stereo Vision), Type(Image, Position, ... by Geography - Trends & Forecast to 2014 ... expected to reach $3,319.71 Million by 2020, growing ... 2020. Browse 71 market data tables ...
Breaking Biology News(10 mins):Togo's Eateries Improve Security and Accountability with Crossmatch Fingerprint Readers 2Togo's Eateries Improve Security and Accountability with Crossmatch Fingerprint Readers 3Natural Language Processing Market Worth $13.4 Billion by 2020 2Natural Language Processing Market Worth $13.4 Billion by 2020 3Natural Language Processing Market Worth $13.4 Billion by 2020 4Natural Language Processing Market Worth $13.4 Billion by 2020 53D Sensor Market Worth $3,319.71 Million by 2020 23D Sensor Market Worth $3,319.71 Million by 2020 33D Sensor Market Worth $3,319.71 Million by 2020 4
... may not be the answer to mitigating climate change by ... to an international team of plant biologists. The researchers found ... fungi (AMF) -- a type of fungus that is often ... then leads to higher decomposition rates of organic materials, said ...
... the methane on Earth comes from the ocean,s oxygen-rich waters, ... this potent greenhouse gas. Now researchers report that they have ... the most abundant microbes on the planet. The findings ... who made the discovery did not set out to explain ...
... part of the marine ecosystem, fostering biodiversity and protecting ... with pollution and harmful fishing practices, are one of ... One of the solutions to the crisis ... Tel Aviv University,s Department of Molecular Microbiology and Biotechnology, ...
Cached Biology News:Plants' fungi allies may not help store climate change's extra carbon 2Study identifies prime source of ocean methane 2Study identifies prime source of ocean methane 3Viruses could be the key to healthy corals 2
(Date:7/3/2015)... ... July 03, 2015 , ... DryLet, ... as animal waste reduction, bioremediation, wastewater treatment, aquaculture and grease, fat and ... that it will be showcasing, ManureMagic™, its industry-leading product for animal waste ...
(Date:7/3/2015)... ... July 03, 2015 , ... The Alexander Group, a ... service industries alike-- typically known for its consummate professionalism-- embarks each year in ... and break from their day jobs. , "Our motto has always been work ...
(Date:7/3/2015)... , July 3, 2015 ... till 22 september 2015 på  http://www.openinnovationinscience.at ... Innovation in Science" som hålls i ... en färsk undersökning med internationella forskare och ... (LBG) är hälsovetenskapens två största utmaningar bristen ...
(Date:7/3/2015)...  Pomerantz LLP announces that a class action lawsuit ... the "Company")(NYSE: PBYI ) and certain of its ... Court, Central District of California , ... class consisting of all persons or entities who purchased ... 2015 inclusive (the "Class Period").  This class action seeks ...
Breaking Biology Technology:DryLet to Highlight Benefits of Patented ManureMagic™ at North American Manure Expo in Chambersburg, PA July 14-15, 2015 2The Alexander Group Declares Their Independence with a Bit of Levity 2Lansering av världens första program för öppen innovation för att utbilda forskare 2Lansering av världens första program för öppen innovation för att utbilda forskare 3SHAREHOLDER ALERT: Pomerantz Law Firm Reminds Shareholders with Losses on their Investment in Puma Biotechnology, Inc. of Class Action Lawsuit and Upcoming Deadline - PBYI 2SHAREHOLDER ALERT: Pomerantz Law Firm Reminds Shareholders with Losses on their Investment in Puma Biotechnology, Inc. of Class Action Lawsuit and Upcoming Deadline - PBYI 3SHAREHOLDER ALERT: Pomerantz Law Firm Reminds Shareholders with Losses on their Investment in Puma Biotechnology, Inc. of Class Action Lawsuit and Upcoming Deadline - PBYI 4
... CMC Biologics, a leading biopharmaceutical contract manufacturing ... US 2,171,034 B1 covering a method for improving ... bioreactors. The invention is designed to optimize production ... process, wherein the bioreactor (fermenter) has an ultrafiltration ...
... 5, 2012  ZyGEM Corp. Ltd., a developer and ... DNA and other nucleic acids, and the US ... today announced the signing of a Cooperative Research ... simplified sample processing solutions for biothreat agents.  The ...
... smaller and smaller, flirting with new devices at the ... of our technology is reaching an end. Without an ... will stop. One promising alternative is graphene the ... a semiconductor, but it can be altered to display ...
Cached Biology Technology:CMC Biologics Strengthens its Innovative Biomanufacturing Technology Portfolio in Continuous Perfusion Systems 2ZyGEM and USAMRIID Sign CRADA for Development of Simplified Sample Processing Solutions for Biothreat Agents 2ZyGEM and USAMRIID Sign CRADA for Development of Simplified Sample Processing Solutions for Biothreat Agents 3'Nanowiggles:' Scientists discover graphene nanomaterials with tunable functionality in electronics 2'Nanowiggles:' Scientists discover graphene nanomaterials with tunable functionality in electronics 3
... wide mouth PYREX Fernbach-style culture flask is designed ... to volume ratio. It can also be used ... outside edges to achieve maximal oxygen transfer to ... I.D. and accepts cotton plugs or No. 13 ...
... depletion cocktail is tailored to ... from suspensions of rat spleen ... the StemSep (or compatible 0.5 ... system. The CD4+ T cell ...
Preparation TW--Compatibility: Push-on end cap seals suitable up to 70 C only -Hybridization Tube for Model HB-1D -Comp Dim: 200 80 mm -Material: borosilicate glass -Mfr Desig: Techne FHB-12...
Preparation TW--Compatibility: no end cap seals -Hybridization Tube for Hybrigene -Comp Dim: 240 80 mm -Material: borosilicate glass -Mfr Desig: Techne FHB-15...
Biology Products: