Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Dartmouth study shows US Southwest irrigation system facing decline after 4 centuries

13.02.2014
Reduced snowmelt, socioeconomic factors reflect pressures on once isolated communities around world

Communal irrigation systems known as acequias that have sustained farming villages in the arid southwestern United States for centuries are struggling because of dwindling snowmelt runoff and social and economic factors that favor modernism over tradition, a Dartmouth College study finds.

The results reflect similar changes around the world, where once isolated communities are becoming integrated into larger economies, which provide benefits of modern living but also the uncertainties of larger-scale market fluctuations. The study appears in the journal Global Environmental Change.

A PDF of the study is available on request.

Acequias evolved in the Middle East and Roman Empire and were introduced into the Americas by Spanish colonizers in the early 1600s. The term acequia refers to both communities of farmers as well as engineered irrigation canals that carry snowmelt-driven runoff to farm fields as a way for the agricultural communities to share a scarce resource in arid regions. The acequias system, which is common in northern New Mexico and southern Colorado, provides a model of communal ownership that governs water rights, distribution, disputes and other issues.

Dartmouth Assistant Professor Michael Cox, the study's author, examined the acequias of the Taos Valley in northern New Mexico. He found the acequias are declining in terms of their agricultural productivity and have mostly lost their common property-based livestock pasturing system. The changes stem from a declining amount of snowmelt and a host of socio-economic factors, many resulting from population growth in the nearby city of Taos. The factors include state-level public policies that grant private water rights to individuals, which conflicts with the acequias' water sharing traditions; newcomers who are increasing demand for what water remains; increased tourism and land use development; and declining reliance on traditions in favor of modern, highly integrated economies.

Researchers typically focus on successful examples of community-based common-pool resource management systems, but Cox's study, which used a mix of interview, survey, remote sensing and census data, is among the few to explore the deterioration of such systems.

"While some of these changes can be attributed to declines in water availability, much of the change results from social drivers, including demographic changes, regional-to-global market forces and public policies," Cox says. "It thus seems quite unlikely that the acequias in Taos will return to their historical situation, meaning the acequia farmers must adapt to the current conditions."

Professor Cox is available to comment at Michael.E.Cox@dartmouth.edu.

The research was supported by the National Science Foundation.

Broadcast studios: Dartmouth has TV and radio studios available for interviews. For more information, visit: http://www.dartmouth.edu/~opa/radio-tv-studios/

John Cramer | EurekAlert!
Further information:
http://www.Dartmouth.edu

More articles from Ecology, The Environment and Conservation:

nachricht Joint research project on wastewater for reuse examines pond system in Namibia
19.12.2016 | Technische Universität Darmstadt

nachricht Scientists produce a new roadmap for guiding development & conservation in the Amazon
09.12.2016 | Wildlife Conservation Society

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

Im Focus: How to inflate a hardened concrete shell with a weight of 80 t

At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).

Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...

Im Focus: Bacterial Pac Man molecule snaps at sugar

Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.

The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...

Im Focus: Newly proposed reference datasets improve weather satellite data quality

UMD, NOAA collaboration demonstrates suitability of in-orbit datasets for weather satellite calibration

"Traffic and weather, together on the hour!" blasts your local radio station, while your smartphone knows the weather halfway across the world. A network of...

Im Focus: Repairing defects in fiber-reinforced plastics more efficiently

Fiber-reinforced plastics (FRP) are frequently used in the aeronautic and automobile industry. However, the repair of workpieces made of these composite materials is often less profitable than exchanging the part. In order to increase the lifetime of FRP parts and to make them more eco-efficient, the Laser Zentrum Hannover e.V. (LZH) and the Apodius GmbH want to combine a new measuring device for fiber layer orientation with an innovative laser-based repair process.

Defects in FRP pieces may be production or operation-related. Whether or not repair is cost-effective depends on the geometry of the defective area, the tools...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

Nothing will happen without batteries making it happen!

05.01.2017 | Event News

 
Latest News

Multiregional brain on a chip

16.01.2017 | Power and Electrical Engineering

New technology enables 5-D imaging in live animals, humans

16.01.2017 | Information Technology

Researchers develop environmentally friendly soy air filter

16.01.2017 | Power and Electrical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>