EIA: Drought in California triggers higher gas power generation

Droughts in California trigger higher natural gas power generation

The drought in California continues to increase in severity since California’s governor declared a state of drought emergency in January 2014, according to a report by the U.S. EIA.


As of September 30, 58% of the state was classified as experiencing exceptional drought, the most intense drought category. These dry conditions limit hydropower generation, requiring generation from other sources to make up for the shortfall.

In California, natural gas-fired capacity is often used to help offset lower levels of generation from hydropower facilities. The chart below shows how this inverse relationship can work: when monthly hydropower generation dips under 10-year average levels, monthly natural gas generation often rises above its 10-year average in response.

EIA: Drought in California triggers higher natural gas power generation chart

From January through June of 2014, natural gas generation in California was 3% higher compared to the same period in 2013 and 16% higher compared to the January-June average from the previous 10 years.

Wind and solar generation are also playing an increasingly significant role in California’s generation mix. For the first time, wind generation surpassed hydro generation in California, doing so in both February and March of 2014. In the California Independent System Operator’s (CAISO) Summer Loads & Resource Assessment, CAISO noted that the generation supply was expected to be adequate in order to meet peak electrical demand requirements in spite of drought-related concerns, in part because of recent renewable and natural gas capacity additions.

 

Press Release, October 6, 2014; Image: EIA

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