California’s water saving brings bonus effects- electricity savings and GHG reductionsLeave a Comment
- The decrease in water usage translated into a significant electricity saving of 1,830 gigawatt hours (GWh) resulting in GHG emissions saved of 524,000 metric tons of carbon dioxide equivalent (CO2e), the equivalent of taking 111,000 cars off the road for a year.
- water conveyance and use accounts for 19 per cent of total electricity demand and 32 per cent of total non-power plant natural gas demand state-wide
January 11, 2018 IOP Publishing read full ScienceDaily article here
Water-saving measures in California have also led to substantial reductions in greenhouse gas (GHG) emissions and electricity consumption in the state.
Measures to cut water use by 25 per cent across California were implemented in 2015, following a four-year drought in the state that caused the fallowing of 542,000 acres of land, total economic costs of $2.74 billion, and the loss of approximately 21,000 jobs.
The UC Davis researchers found that, while the 25 per cent target had not quite been reached over the one-year period — with 524,000 million gallons of water saved — the measures’ impact had positive knock-on effects for other environmental objectives.
In California, the water and energy utility sectors are closely interdependent. The energy used by the conveyance systems that move water from the wetter North to the drier and more heavily populated South — combined with utility energy use for treatment and distribution, end-user water consumption for heating, and additional pumping and treatment — accounts for 19 per cent of total electricity demand and 32 per cent of total non-power plant natural gas demand state-wide….
Edward S Spang, Andrew J Holguin, Frank J Loge. The estimated impact of California’s urban water conservation mandate on electricity consumption and greenhouse gas emissions. Environmental Research Letters, 2018; 13 (1): 014016 DOI: 10.1088/1748-9326/aa9b89