A new study from the International Institute for Applied Systems Analysis (IIASA) shows how improving communication and involvement could bring consensus solutions for the embattled Rio Grande/Bravo, which is shared between the USA and Mexico.
The Rio Grande (called Rio Bravo in Mexico) is the lifeline to an expansive desert in the southwest USA and northern Mexico. From Colorado to the Gulf of Mexico, over 3000km, people depend on the river to quench their thirst and irrigate their crops. The river also forms the boundary between the USA and Mexico for 2034 km.
Yet as the river flows from the US, along the border, and into Mexico, it brings with it conflicts and challenges. The water level in the river is declining as use exceeds supply—an unsustainable situation. Water demand is rising as the population in the region grows, and corresponding economic growth drives continued development.
At the same time, water pollution imperils and stresses the delicate ecosystems supported by the river. Ecosystems are often the last to be considered when water levels are low. Moreover, climate change is expected to lower water levels even further, exacerbating the problems.
Water allocation between the two countries is governed by the 1944 Treaty between the United States of America and the United Mexican States relating to the utilization of the waters of the Colorado and Tijuana Rivers, and of the Rio Grande. The treaty was made at a time when the water resources were plentiful in relation to the population, and the environment was not yet something that policymakers considered at all.
The new study suggests that in order to preserve the river for the future, the involved parties can take advantage of an existing binational mechanism that allows flexibility to adapt the treaty without changing its structure. The study elaborates on four policy recommendations on how to do this.
“Everyone wants to preserve their water supply, even when there is not enough water,” explains Luzma Fabiola Nava, a postdoctoral fellow in the IIASA water program and the author of the new study published in the journal Water. “The water supply isn’t enough anymore to meet the increasing demands. If we don’t allow for flexibility in the treaty, all these problems are going to get worse.”
Consensus solutions for an international quandary
Nava, a native of Mexico who did her PhD in international studies in Canada, made an extensive analysis of documents and case studies related to the Rio Grande/Bravo water management practices and policies. She conducted two rounds of fieldwork and 77 interviews with people across the Rio Grande/Bravo basin, asking them about their perceptions and interests related to the river.
“The interviewees included water managers in Colorado; pecan farmers, water engineers and managers, researchers, citizens, and environmental groups in New Mexico and Texas; and water managers, members of the academia, and environmental groups in Mexico: basically anyone who relies on the river or cares about it. We wanted to cast as wide a net as possible because these are the people who know the river—who better than them to talk about the existing problems and the potential solutions,” says Nava.
Based on the perspectives and interests gathered through the interviews and analysis, Nava and colleagues proposed four policy recommendations that could help strengthen water resources management in the region:
1. Allow for reciprocal and temporary water re-distribution, meaning that during times of drought, water could be moved from one purpose to another. For example during a drought it might make economic sense for a farmer to transfer their water to another use, like city or municipal use or fish farming. Such a scheme would allow them to temporarily transfer their water right to another willing user, who would give them back their water in times of water abundance.
2. Take better advantage of the many experts in the region, and bring them together to work and communicate among themselves.
3. Formulate small-scale strategies to reach sustainability across the basin. For example this could mean, for the region above Elephant Butte Dam in New Mexico, strengthening efforts to restore native habitats and protect the forest. For the region between Elephant Butte Dam to El Paso, Texas it could mean removing sediments in the river and to bring it alive even during the non-irrigation season. And for the binational stretch of the river, to agree on a common interpretation on water quality related issues that need to be solved.
4. To reach a binational agreement for the Rio Grande/Bravo, adapting the scope of the 1944 treaty to account for pressing current problems and future challenges.
IIASA Water Program Director Simon Langan says that the Nava’s work confirms the increasing importance of global drivers such climate change, population growth, and ecosystem health, at the regional level. He says, “This study adds to and complements the growing global recognition of the importance of water and the potential for increasing conflict where increasing demand for water exceeds supply. Nowhere is this more important in significant transboundary river basins where there is an urgent need to recognize and develop wider participation aimed at building consensus on solutions for future water management.”
Nava, L. F., Brown, C., Demeter, K., Lasserre, F., Milanes-Murcia, M., Mumme, S. and Sandoval-Solis, S. (2016) Existing opportunities to adapt the Rio Grande/Bravo Basin Water Resources Allocation Framework. Water 2016, 8, x; doi:10.3390/
Collaborators on this study included researchers from Canada, the USA, and Austria: including researchers at New Mexico State University, the University of Vienna, Université Laval in Canada, Colorado State University, and the University of California, Davis.
MSc Katherine Leitzell | idw - Informationsdienst Wissenschaft
Conservationists are sounding the alarm: parrots much more threatened than assumed
15.09.2017 | Justus-Liebig-Universität Gießen
A new indicator for marine ecosystem changes: the diatom/dinoflagellate index
21.08.2017 | Leibniz-Institut für Ostseeforschung Warnemünde
Controlling electronic current is essential to modern electronics, as data and signals are transferred by streams of electrons which are controlled at high speed. Demands on transmission speeds are also increasing as technology develops. Scientists from the Chair of Laser Physics and the Chair of Applied Physics at Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) have succeeded in switching on a current with a desired direction in graphene using a single laser pulse within a femtosecond ¬¬ – a femtosecond corresponds to the millionth part of a billionth of a second. This is more than a thousand times faster compared to the most efficient transistors today.
Graphene is up to the job
At the productronica trade fair in Munich this November, the Fraunhofer Institute for Laser Technology ILT will be presenting Laser-Based Tape-Automated Bonding, LaserTAB for short. The experts from Aachen will be demonstrating how new battery cells and power electronics can be micro-welded more efficiently and precisely than ever before thanks to new optics and robot support.
Fraunhofer ILT from Aachen relies on a clever combination of robotics and a laser scanner with new optics as well as process monitoring, which it has developed...
Plants and algae use the enzyme Rubisco to fix carbon dioxide, removing it from the atmosphere and converting it into biomass. Algae have figured out a way to increase the efficiency of carbon fixation. They gather most of their Rubisco into a ball-shaped microcompartment called the pyrenoid, which they flood with a high local concentration of carbon dioxide. A team of scientists at Princeton University, the Carnegie Institution for Science, Stanford University and the Max Plank Institute of Biochemistry have unravelled the mysteries of how the pyrenoid is assembled. These insights can help to engineer crops that remove more carbon dioxide from the atmosphere while producing more food.
A warming planet
Our brains house extremely complex neuronal circuits, whose detailed structures are still largely unknown. This is especially true for the so-called cerebral cortex of mammals, where among other things vision, thoughts or spatial orientation are being computed. Here the rules by which nerve cells are connected to each other are only partly understood. A team of scientists around Moritz Helmstaedter at the Frankfiurt Max Planck Institute for Brain Research and Helene Schmidt (Humboldt University in Berlin) have now discovered a surprisingly precise nerve cell connectivity pattern in the part of the cerebral cortex that is responsible for orienting the individual animal or human in space.
The researchers report online in Nature (Schmidt et al., 2017. Axonal synapse sorting in medial entorhinal cortex, DOI: 10.1038/nature24005) that synapses in...
Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a...
19.09.2017 | Event News
12.09.2017 | Event News
06.09.2017 | Event News
26.09.2017 | Life Sciences
26.09.2017 | Physics and Astronomy
26.09.2017 | Information Technology