Lifting Water, Falling Water: Energy Balance of the Colorado River

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Presentation transcript:

Lifting Water, Falling Water: Energy Balance of the Colorado River Jesse Clah and Karl Flessa Geosciences, University of Arizona Space Grant Symposium Sheraton Phoenix Airport Hotel Tempe 1600 South 52nd Street Tempe, AZ 85281 Friday, April 22, 2017

Can a river system have a carbon footprint? How is water diverted? How is it transported? Where does it go? How much energy is needed to transport water? Colorado River Basin Source: New Yorker

Methods Identify reservoirs along the river and its tributaries. Determined which reservoirs produced energy via hydro-electric plant. Collect data on energy output of power plants for a 10 year average. Identify agencies that distribute water, how they do it and what power source they use. Calculate energy produced and consumed in terms of CO2 output (ton).

How is Colorado River Water diverted? Aqueducts within the basin Aqueducts for out-of-basin transfers Colorado River Basin. Water Projects are shown in black. Source: www.nap.edu Colorado River Aqueduct Source: www.mwdh2o.com/DocSvcsPubs/inspection-trip

Source : Bureau of Reclamation How is it Transported? Pumping stations Natural gravity fall Pipes Canal to reservoir to pumping plant Tijuana Aqueduct supply pipes Source: www.secner.com Whitsett Pumping Plant at Lake Havasu Source : Bureau of Reclamation

Where does it go? All over the Southwestern States Arizona California Colorado Nevada New Mexico Utah Wyoming Mexico Mexicali Tijuana Central Arizona Project runs 540 km through Arizona Source: Bureau of Reclamation

What Powers the Transport?

What Powers the Transport?

Results

Conclusions Only 5 projects use energy to move water 4 of the 5 use or reclaim energy via hydroelectric Tijuana Aqueduct uses a mix of energy: geothermal and natural gas The CAP uses all coal fired energy resulting in a carbon foot print of 4.7 tons per acre feet or 0.38 grams per liter. Most Colorado River water is “green” Source: www.watermart.com

Future Directions Collecting data on evaporation rates on open canals Data on energy used to treat, store and then deliver water to cities and homes. Can this research be applied to other river systems

Thank you