Climate change, as well as population growth, indicates that water shortages in parts of the United States are long before the end of the century, according to a new study by AGU. The future of the earth.
Also, the authors of the new study will not be enough to have enough water to make more use of water in municipalities and industries. The results show that the reduction of water use in agriculture will be of the utmost importance in reducing water shortages in the future.
The new study is part of a larger 10-year US Forest Service Assessment of Renewable Resources, including Timber, Area Feed, Wildlife and Water.
"The new study not only provides the best estimate of future water supply and demand, but also looks at what we can do to reduce the projected shortfall," said Thomas Brown, a US Forest Service Rocky Mountain Research Station in Colorado and a leading research author.
To do this, researchers used different global climate models to look at future climate scenarios and how they could affect water supply and demand. They also took into account population growth.
On the water side, the authors used a water extraction model to estimate the amount of water that would become available across the country and modeled how water would be delivered inside and outside the stream or stored in tanks. for future use.
The new study found that climate change and population growth in some US regions, especially in the Central and South Alliance, Southwest and Central Rocky Mountains, as well as in California, as well as in some southern and regional areas, can pose serious problems. Midwest.
The new analysis is based on a comparison of future water supply with the estimated water demand in various water uses such as industry and agriculture.
The study found that per capita water consumption rates continue to decline in most water use sectors, but are not enough to avoid the expected water shortages due to population growth and the combined effects of climate change.
The authors of the study looked at various adaptive strategies to reduce the predicted water shortage, for example by increasing reservoir storage capacity, pumping more water from groundwater aquifers and shifting more water from streams and rivers. Increasing reservoir sizes is not promising to address water scarcity, especially in parts of the US that are expected to change climate change.
"If water is a limiting factor, the expansion of the reservoir is unlikely to keep water," said Browns.
Subsequent reductions in groundwater reserves and increased flows in the flow streams could help to alleviate future shortages in many areas, but will have serious social and environmental costs. If these costs are to be avoided, the improvement of irrigation efficiency will have to become an important priority and it will probably be important that water is channeled from agriculture to other sectors.
Brown warns that people should not read too much in the report on local water supply. The new study models are large water reservoirs and are not considered to take place on a city or county scale.
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Materials provided American Geophysical Union. Note: Content can be edited for style and length.