Featured Research

from universities, journals, and other organizations

Greater desertification control using sand trap simulations

Date:
September 27, 2013
Source:
Springer Science+Business Media
Summary:
A new simulation will help improve artificial sand-control measures designed to help combat desertification. In the fight against desertification, so-called straw checkerboard barriers (SCB) play a significant role. SCB consists of half-exposed criss-crossing rows of straws of wheat, rice, reeds, and other plants. Researchers have performed a numerical simulation of the sand movement inside the SCB. The results will help to understand sand fixation mechanisms that are relevant for sandstorm and land-desertification control.

A new simulation will help improve artificial sand-control measures designed to help combat desertification

In the fight against desertification, so-called straw checkerboard barriers (SCB) play a significant role. SCB consists of half -exposed criss-crossing rows of straws of wheat, rice, reeds, and other plants. The trouble is that our understanding of the laws governing wind-sand movement in SCB and their surrounding area is insufficient. Now, Ning Huang and colleagues from Lanzhou University in China have performed a numerical simulation of the sand movement inside the SCB, described in a paper just published in EPJ E. China is particularly affected by desertification, which affects 18 percent of its territory. The results will help us to understand sand fixation mechanisms that are relevant for sandstorm and land-desertification control.

The authors relied on a simulation of large eddies, which are circulations around an obstruction such as the SCB walls, to study the turbulence stress.. They also used a discrete particle-tracing method to numerically simulate the wind -sand movement inside the SCB. Specifically, they described the sand as a gas, using equations to describe their space-averaged hydrodynamics. They also analysed in detail the movement characteristics of sand particles, the transverse velocities of sand particles and wind-sand flow within the SCB using a model taking into consideration the coupling effects of wind field and sand particles.

Huang and colleagues found that the SCB contributed to a decrease in the sand transport rate in its interior, thus helping the sand fixation. What is more, as the transverse distance increases, the strength of wind-sand flow eddies decreases. Meanwhile, the sand accumulates near the interior walls of the SCB. Finally, as the number of SCBs increases, the wind is less able to transport sand.

Future studies will be designed to optimise SCB design, based on the authors' theoretical analysis. These findings could also be used to study the evolution to sand dunes.


Story Source:

The above story is based on materials provided by Springer Science+Business Media. Note: Materials may be edited for content and length.


Cite This Page:

Springer Science+Business Media. "Greater desertification control using sand trap simulations." ScienceDaily. ScienceDaily, 27 September 2013. <www.sciencedaily.com/releases/2013/09/130927092352.htm>.
Springer Science+Business Media. (2013, September 27). Greater desertification control using sand trap simulations. ScienceDaily. Retrieved April 17, 2014 from www.sciencedaily.com/releases/2013/09/130927092352.htm
Springer Science+Business Media. "Greater desertification control using sand trap simulations." ScienceDaily. www.sciencedaily.com/releases/2013/09/130927092352.htm (accessed April 17, 2014).

Share This



More Earth & Climate News

Thursday, April 17, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Change of Diet Helps Crocodile Business

Change of Diet Helps Crocodile Business

Reuters - Business Video Online (Apr. 16, 2014) Crocodile farming has been a challenge in Zimbabwe in recent years do the economic collapse and the financial crisis. But as Ciara Sutton reports one of Europe's biggest suppliers of skins to the luxury market has come up with an unusual survival strategy - vegetarian food. Video provided by Reuters
Powered by NewsLook.com
How Mt. Everest Helped Scientists Research Diabetes

How Mt. Everest Helped Scientists Research Diabetes

Newsy (Apr. 15, 2014) British researchers were able to use Mount Everest's low altitudes to study insulin resistance. They hope to find ways to treat diabetes. Video provided by Newsy
Powered by NewsLook.com
The Walking, Talking Oil-Drigging Rig

The Walking, Talking Oil-Drigging Rig

Reuters - Business Video Online (Apr. 15, 2014) Pennsylvania-based Schramm is incorporating modern technology in its next generation oil-drigging rigs, making them smaller, safer and smarter. Ernest Scheyder reports. Video provided by Reuters
Powered by NewsLook.com
In Washington, a Push to Sterilize Stray Cats

In Washington, a Push to Sterilize Stray Cats

AFP (Apr. 14, 2014) To curb the growing numbers of feral cats in the US capital, the Washington Humane Society is encouraging residents to set traps and bring the animals to a sterilization clinic, after which they are released.. Duration: 02:29 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins