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:12/10/2014)... , Dec. 9, 2014 CIE San Diego ... that provides the connective tissue that enhances care coordination ... to easily share client-level information; earned a second $1 ... to organizations serving seniors aging in community and; will ... on December 11 th 4-6p. CIE ...
(Date:12/5/2014)... 4, 2014  Tute Genomics, a leader in cloud-based ... Series A1 funding led by UK-based Eurovestech. Peak Ventures ... the investment round. "We are at a ... next-generation sequencing and seeks new approaches for the diagnosis, ... , MD MBA, and CEO of Tute Genomics. "One ...
(Date:11/21/2014)... DALLAS , November 18, 2014 ... Security Systems Market by Systems (Video, RFID, Access Control, ... (SEZ, Factories, Hotels, Banks, Government), Component Service Geography - ... Security Systems Market is projected to be around $25 ... Billion by 2020, growing at a CAGR of 8.69%. ...
Breaking Biology News(10 mins):Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 3Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 4Tute Genomics Raises $2.3 Million to Scale Up Cloud-Based Genome Analytics and Accelerate Personalized Medicine 2Tute Genomics Raises $2.3 Million to Scale Up Cloud-Based Genome Analytics and Accelerate Personalized Medicine 3Industrial Security Systems Market Worth $38 Billion by 2020 2Industrial Security Systems Market Worth $38 Billion by 2020 3
... of us never considered eating the mud pies we made ... dining on dirt is nothing out of the ordinary. Now ... The Quarterly Review of Biology helps explain why. ... human geophagythe eating of earthis that it protects the stomach ...
... a researcher, please contact the Communications and External Relations staff member ... ORNL and its research and development activities, please refer to one ... or comment, you can send it to news@ornl.gov . ... Unsafe commercial motor vehicles may be off the ...
... like a computer. An organism,s genome is the software ... do. But instead of electronic circuitry, life relies on ... organisms to function. Now, researchers at the California Institute ... circuit ever created from scratch, made with DNA-based devices ...
Cached Biology News:Eating dirt can be good for the belly, researchers find 2Eating dirt can be good for the belly, researchers find 3Story tips from the Department of Energy's Oak Ridge National Laboratory, June 2011 2Caltech researchers build largest biochemical circuit out of small synthetic DNA molecules 2Caltech researchers build largest biochemical circuit out of small synthetic DNA molecules 3Caltech researchers build largest biochemical circuit out of small synthetic DNA molecules 4
(Date:12/19/2014)... --  ISN has released its third annual U.S. ... publication series. With data aggregated from over eight billion ... its online contractor management platform, ISNetworld, this three-part series ... statistics. The Contractor Performance ... available in two industry specific volumes: Oil & ...
(Date:12/17/2014)... The Activated Carbon Manufacturing industry ... IBISWorld updated its original industry research report. , ... intensified focus on environmental policy. Over the five years ... power plants and a range of other industrial facilities ... Sarah Kahn, “a range of downstream industrial sectors rely ...
(Date:12/17/2014)... Bellingham, Washington, USA (PRWEB) December 16, 2014 ... Kirstin Baum, manager at Philipps- Universität Marburg’s Department ... optics and photonics, in the newly released ... 2015-2016. “And never be too shy to ask ... STEM (science, technology, engineering, and mathematics) occupations ranging ...
(Date:12/17/2014)... N.J. (PRWEB) December 17, 2014 ... (Euronext: IPN; ADR: IPSEY), today announced ... (referred to as Somatuline®) was approved by the ... treatment of gastroenteropancreatic neuroendocrine tumors (GEP-NETs) in adult ... advanced or metastatic disease to improve progression-free survival ...
Breaking Biology Technology:ISN Releases Third Edition of US Contractor Health & Safety Performance Indicators Publication Series 2ISN Releases Third Edition of US Contractor Health & Safety Performance Indicators Publication Series 3Activated Carbon Manufacturing in the US Industry Market Research Report Has Been Updated from IBISWorld 2Activated Carbon Manufacturing in the US Industry Market Research Report Has Been Updated from IBISWorld 3Network, Multitask, Persevere: SPIE Women in Optics Planner Subjects Share from Experience 2Network, Multitask, Persevere: SPIE Women in Optics Planner Subjects Share from Experience 3Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 2Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 3Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 4Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 5Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 6Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 7Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 8
... 20 eResearchTechnology,Inc. (eRT), (Nasdaq: ERES ), ... interpretation services,announced today that Dr. Michael J. McKelvey, ... Baron, the Company,s Chief Financial,Officer, are scheduled to ... at 9:00 a.m. Eastern on May 28, 2008 ...
... Parents of children with,autism often grapple with a bewildering ... the disorder? Could it be genetic? What is it,like to ... therapies that,might alleviate some of my child,s symptoms?", On ... will have a unique opportunity to hear from researchers on ...
... on Regenesis, SCOTTSDALE, Ariz., May 20 ... the Provant(R) Wound Therapy,System, announced today the formation ... to guide advanced scientific investigations into the,mechanism of ... of Regenesis, platform technology to clinical and industrial,applications., ...
Cached Biology Technology:eResearchTechnology to Present at the FBR 12th Annual Spring Investor Conference on May 28th 2008 2First Annual Autism Conference at Packard Children's and Stanford Brings Parents and Researchers Together 2First Annual Autism Conference at Packard Children's and Stanford Brings Parents and Researchers Together 3Regenesis Biomedical Appoints Scientific Advisory Board Composed of Life Science and Electronics Experts 2Regenesis Biomedical Appoints Scientific Advisory Board Composed of Life Science and Electronics Experts 3
... Partially purified chicken intestinal cytoplasmic ... D receptor (VDR) from human, rat, ... tissues. This antibody does not ... MA1-710 detects both the occupied ...
... Polymerase is ideal for high-fidelity amplification ... such as cloning and mutagenesis. ... proprietary enzyme preparation containing recombinant DNA ... (3'Cut Site5' exonuclease) activity. Platinum ...
... offers precision beveling of micropipette ... The unique abrasive plate drive ... greater control of the beveling ... very rapidly and produces consistent ...
... 2 mM sodium phosphate buffer, pH 6.5. ... is a major lysosomal aspartyl protease in ... proenzyme. Overexpression of cathepsin D in human ... of relapse and metastasis. Cathepsin D degrades ...
Biology Products: