Navigation Links
Lost water of the Napa Valley vineyards
Date:12/16/2009

Getting the most out of every drop of water is a high priority for grape growers in the southern Napa Valley, where summers are hot and dry and vines have to be irrigated to make it through the growing season. But Stanford researchers have found that a significant portion of the water applied to the vines zips right by the plants, hardly even pausing.

"We found that about 10 percent of the water that is applied is lost below the vine rooting zone and does not have contact with the soil and vine roots," said Eve Hinckley, who worked on the project for her PhD thesis in the department of geological and environmental sciences at Stanford. "This is a conservative estimate."

The problem lies in deep cracks that are a chronic feature in the clay-rich soils of the areaDue to the physical and chemical properties of these soils, they naturally swell when wet and shrink as they dry, producing cracks. Hinckley says that tendency is exacerbated by the weekly cycle of irrigating during the growing season, when vines are typically watered for 4 hours a week. Under a regular regimen of swelling and shrinking, the cracks become more pronounced and water speeds through them without interacting with the soil.

Hinckley is presenting her results at the fall meeting of the American Geophysical Union on Wednesday, Dec. 16.

She gathered her data by burying devices called lysimeters about 16 inches down in the soil just below the root zone of the vines. That is also the depth to which many of the deep cracks penetrate in the vineyard where she did her study. The lysimeters captured water flowing through the soil, giving her data on the volume, chemical composition, and residence time of water in the soil.

The speedy passage of so much water through the cracks in the soil affects more than just the job of getting enough water to the vines. There are significant consequences on either end of that rapid flow. Upstream, it means that more
'/>"/>

Contact: Louis Bergeron
louisb3@stanford.edu
650-725-1944
Stanford University
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Newly identified enzymes help plants sense elevated CO2 and could lead to water-wise crops
2. Lehigh University professor receives Astellas Award for arsenic groundwater remediation efforts
3. Canna can: Ornamental eliminates pollutants from stormwater runoff
4. Uniform analyses for clean drinking water in Europe
5. UGA researchers lead team in discovery involving devastating freshwater fish parasite, Ich
6. Just like old times: Generating RNA molecules in water
7. K-State program will give young professionals skills to protect water resources
8. Geologists studying groundwater arsenic levels in India empower Bengali women, children
9. UMCES researchers launch freshwater marsh study
10. Nanyang Technological University and UK partners heightens cooperation in water industry
11. Ocean observing scientists and marine industries teaming up to sustainably monitor the water column
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/17/2014)... . Our eyes ... us with a continuous stream of information about our own ... in a car the world glides by us and ... effort, our brain calculates self-motion from this "optic flow". This ... gaze during our own movements. Together with biologists from the ...
(Date:4/17/2014)... One day about eight years ago, Katia ... Riverside, and her father were on a field trip in ... an orchid they had never seen before. , Unable to ... orchids. The orchid turned out to be an unnamed ... Lophiaris silverarum . , "Lophiaris" is the genus name, comprising ...
(Date:4/17/2014)... that devastate honeybees in Europe, Asia and the United ... appear to be impacting native honeybee populations at this ... invasive pests include including Nosema microsporidia and ... to be resilient to these invasive pests, which suggests ... in Europe, Asia and the United States currently are ...
Breaking Biology News(10 mins):How vision makes sure that little fish do not get carried away 2How vision makes sure that little fish do not get carried away 3How vision makes sure that little fish do not get carried away 4Orchid named after UC Riverside researcher 2Orchid named after UC Riverside researcher 3East African honeybees are safe from invasive pests… for now 2East African honeybees are safe from invasive pests… for now 3
... Scientists from the UK and Australia have seen the ... in action for the first time. The UK team, funded ... the Wellcome Trust, is based at Birkbeck College where ... perforin uses to punch holes in rogue cells. The research ...
... surface is 30 percent more acidic today than it was in ... - a rising trend that could both harm coral reefs and ... food web, scientists warn. Despite the seriousness of such changes ... complete suite of available tools to monitor rising acidification and other ...
... of ancient Earth with wingspans of up to 70 ... atmospheric levels in the atmosphere in the past. New ... have confirmed that dragonflies grow bigger with more oxygen, ... larger when oxygen was higher in the past. For ...
Cached Biology News:Immune system assassin's tricks visualised for the first time 2Speed installation of system to monitor vital signs of global ocean, scientists urge 2Speed installation of system to monitor vital signs of global ocean, scientists urge 3Speed installation of system to monitor vital signs of global ocean, scientists urge 4Speed installation of system to monitor vital signs of global ocean, scientists urge 5Speed installation of system to monitor vital signs of global ocean, scientists urge 6Speed installation of system to monitor vital signs of global ocean, scientists urge 7Speed installation of system to monitor vital signs of global ocean, scientists urge 8Raising giant insects to unravel ancient oxygen 2Raising giant insects to unravel ancient oxygen 3
(Date:1/15/2014)... (PRWEB) January 15, 2014 Look inside ... hard-working items for the lab, from fluid handling to ... (GIS)—ready to ship when you order. , Preferred ... Pumps , from the L/S® model for precise flow ...
(Date:1/15/2014)... 2014 A study has been launched to ... 1 track could help to tackle the problem of obesity. ... (a GP surgery based in Stowmarket) and academics at University ... Telemetry technology, which is inspired by equipment used to ...
(Date:1/15/2014)... 2013 was a banner year of continued ... saw continued independent research led by the team at ... $1 million grant from the Susanne Marcus Collins Foundation, ... peer reviewed journal, Amy Grant highlighted Brainwave Optimization® in ...
(Date:1/14/2014)... Carahsoft and CDS Federal Services have ... at 2pm EST (11am PST), “Natural Language Processing: Converting ... how technology can turn raw, heterogeneous data into actionable ... The online webinar will last approximately one hour. , ...
Breaking Biology Technology:Cole-Parmer Begins 2014 with the Release of Preferred Solutions 2Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 2Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 3Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 4Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 2Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 3Webcast - Natural Language Processing: Converting Raw Data into Actionable Knowledge – Hosted by Carahsoft and CDS Federal Services 2
... NEW YORK, Oct. 24, 2011 Celgene Corporation (Nasdaq: ... as its Focus Stock of the Week.  CELG carries ... Strong Buy. "We consider Celgene to be ... solid core product growth," said Steven Silver, Biotech Equity ...
... (Nasdaq: PCRX ), an emerging specialty pharmaceutical company, ... ended September 30, 2011 will be released before the market ... will host a conference call to discuss the company,s financial ... 2011 at 9 a.m. ET. The call can be accessed ...
... who developed a novel mouse model mimicking human preterm labor ... targeted it to stop the problem.   (Logo: ... published online the week of Oct. 24 by PNAS ... the researchers report their findings may lead to new strategies ...
Cached Biology Technology:S&P Capital IQ Picks Celgene Focus Stock of the Week 2S&P Capital IQ Picks Celgene Focus Stock of the Week 3Pacira Pharmaceuticals, Inc. Announces Timing for Third Quarter 2011 Financial Results Webcast and Conference Call 2Pacira Pharmaceuticals, Inc. Announces Timing for Third Quarter 2011 Financial Results Webcast and Conference Call 3Study Hints at Possible Therapeutic Strategy to Combat Premature Birth 2Study Hints at Possible Therapeutic Strategy to Combat Premature Birth 3