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:10/22/2014)... 20, 2014  Leading identity analyst firm Acuity Market ... the world,s population will have a chip-based National eID ... . Asia , with its ... for more than 60% of all National eID cards ... -- "The Global National eID Industry Report: ...
(Date:10/19/2014)... India over the last 30 years contributed only ... during that time, according to a new study ... ., "Energy access is fundamental to development: it ... education, communication, and health," says IIASA researcher Shonali ... energy access is widely agreed to be an ...
(Date:10/18/2014)... referred for evaluation of suspected genetic conditions, whole-exome ... percent, including detection of a number of rare ... according to a study appearing in JAMA ... with the American Society of Human Genetics annual ... coding regions of thousands of genes simultaneously using ...
Breaking Biology News(10 mins):Half the World's Population Will Have Chip-Based National Electronic Identity (eID) Cards by 2018 2Improved electricity access has little impact on climate change 2Whole-exome sequencing shows potential as diagnostic tool 2
... and the University of Sheffield have applied computing power to crack ... a partial answer to the age old question "what came first ... in this context is "chicken" or at least a particular ... particular chicken protein turns out to come both first and last. ...
... 2010) -- The Damon Runyon Cancer Research Foundation, ... career researchers and innovative cancer research, named 18 ... Award Committee review. The recipients of this ... basic and translational cancer research in the laboratories ...
... A North Carolina State University entomologist has for the ... termite queens to prevent other termites in the colony from ... In a study published online this week in ... Dr. Ed Vargo and colleagues from Japan and Switzerland show ...
Cached Biology News:Researchers apply computing power to crack egg shell problem 2Damon Runyon Cancer Research Foundation awards prestigious fellowships to 18 top young scientists 2Damon Runyon Cancer Research Foundation awards prestigious fellowships to 18 top young scientists 3Damon Runyon Cancer Research Foundation awards prestigious fellowships to 18 top young scientists 4Damon Runyon Cancer Research Foundation awards prestigious fellowships to 18 top young scientists 5Damon Runyon Cancer Research Foundation awards prestigious fellowships to 18 top young scientists 6Don't let your termites grow up to be mommies 2
(Date:10/22/2014)... and BOSTON , Oct. ... ), a leading global specialty pharmaceutical company, and Rhythm, ... granted an exclusive option to acquire Rhythm,s wholly owned ... a peptide ghrelin agonist, for the treatment of diabetic ... Rhythm has completed a successful Phase 2 trial of ...
(Date:10/22/2014)... 2014 Shimadzu Scientific Instruments introduces its ... for the pain management and clinical markets. The software ... review by allowing users to highlight and review results ... QuantAnalytics allows analysts to filter results by group or ... by eliminating the need to sift through analytes of ...
(Date:10/22/2014)... CA (PRWEB) October 22, 2014 ... from Sartorius, A & D Weighing, Rice Lake, ... CPA Semi-Micro Balance . The Sartorius CPA Semi-Micro ... an affordable high-quality, precise, and user-friendly laboratory balance. ... of laboratory equipment, their laboratory balances are well ...
(Date:10/22/2014)... According to new market research report "Cloud ... Deployment & Support), by Service Model (SaaS, PaaS, ... (Hybrid & Community)) - Global Forecast to 2019", ... Professional Services Market into various sub-segments with an ... identifies the drivers and restraints for this market ...
Breaking Biology Technology:Actavis Signs Option to Acquire Rhythm Subsidiary and its GI Development Product, Relamorelin 2Actavis Signs Option to Acquire Rhythm Subsidiary and its GI Development Product, Relamorelin 3Actavis Signs Option to Acquire Rhythm Subsidiary and its GI Development Product, Relamorelin 4Actavis Signs Option to Acquire Rhythm Subsidiary and its GI Development Product, Relamorelin 5Shimadzu Releases QuantAnalytics Open Access LCMS Software Package for Clinical Applications 2Pipette.com Launches the Addition of Sartorius CPA Semi-Micro Balance to Their Product Portfolio with Special Promotional Pricing 2Pipette.com Launches the Addition of Sartorius CPA Semi-Micro Balance to Their Product Portfolio with Special Promotional Pricing 3Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 2Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 3Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 4Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 5
... in venture funding over 10-year ... life of competition, PITTSBURGH, June ... at Hyde Park Prime,Steakhouse on Pittsburgh,s North Shore Olive earlier this week ... competition. A total,of $82,500 was awarded throughout all phases this year., ...
... amounts are in U.S. dollars, QUEBEC CITY, ... TSX: AEZ;), a global biopharmaceutical company focused on,endocrine ... the sale,of its Quebec City property for a ... Zentaris also entered into a long-term lease agreement,enabling ...
... over $235 Million, SOUTH SAN FRANCISCO, Calif., June ... that the company and,GlaxoSmithKline, Inc. (NYSE: GSK ) ... October 27, 2008, as scheduled. Under the,terms of the ... two of the,compounds in the collaboration for further development ...
Cached Biology Technology:EnterPrize Business Plan Competition Announces Final Phase Winners of Cash Awards Totaling $45,000 2AEterna Zentaris Sells Quebec City Building for $7.1 million 2Exelixis and GlaxoSmithKline Agree to Successfully Conclude Six-Year Discovery and Development Collaboration 2Exelixis and GlaxoSmithKline Agree to Successfully Conclude Six-Year Discovery and Development Collaboration 3Exelixis and GlaxoSmithKline Agree to Successfully Conclude Six-Year Discovery and Development Collaboration 4Exelixis and GlaxoSmithKline Agree to Successfully Conclude Six-Year Discovery and Development Collaboration 5
... Ideal for cell culture scale-up, these ... 10 7 - 10 9 range ... bottles or spinner flasks. • High mechanical ... leak tested prior to shipping • Certified ...
ABgene® supplies a 94kDa ultra-pure recombinant thermostable DNA polymerase obtained by high level expression of the Taq DNA polymerase gene in E. coli....
...
... 94kDa ultra-pure recombinant thermostable DNA polymerase obtained ... DNA polymerase gene in E. coli, Concentration: ... of Thermo Fisher Scientific, the world leader ... customers to make the world healthier, cleaner ...
Biology Products: