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Chapter 3 <br />System Description <br />Table 3-1. Monthly Average Climate Data Summary <br />THE CITY OF <br />PLE ASANTON. <br />January <br />1.51 <br />2.83 <br />February <br />2.17 <br />2.70 <br />March <br />3.63 <br />2.95 <br />April <br />4.94 <br />1.47 <br />May <br />6.16 <br />0.57 <br />June <br />7.10 <br />0.23 <br />July <br />7.53 <br />0.09 <br />August <br />6.61 <br />0.09 <br />September <br />4.98 <br />0.12 <br />October <br />3.50 <br />1.09 <br />November <br />1.93 <br />1.66 <br />December <br />1.41 <br />3.36 <br />f <br />Total 51.5 <br />17.2 <br />(a) Source: <br />California Irrigation Management Information System (CIMIS) data for Station #191: Pleasanton <br />(downloaded November 11, 2020). <br />(b) Source: <br />CIMIS data for Station #191: Pleasanton (data from October 2004 through October 2020). <br />3.4.2 Potential Effects of Climate Change <br />47.4 <br />50.6 <br />53.8 <br />56.9 <br />61.1 <br />67.0 <br />70.2 <br />69.3 <br />67.2 <br />61.0 <br />52.6 <br />47.1 <br />California Water Code now requires water suppliers to account for the impacts of climate change on water <br />supplies and supply reliability. A discussion of the effects of climate change on water demands, supplies, <br />and reliability can be found in Chapter 4, Chapter 6, and Chapter 7 of this UWMP. This section summarizes <br />those discussions. <br />In general, climate change is expected to increase water demand for irrigation and the year-to-year <br />variability of demands. This is the result of increased temperatures (which increases evapotranspiration) <br />and more variability in precipitation (which impacts supply availability and reliability). Also, natural <br />disasters such as wildfires, droughts, and floods are expected to increase in both frequency and intensity. <br />Responding to climate change generally takes two forms: mitigation and adaptation. Mitigation is taking <br />steps to reduce the contribution to the causes of climate change by reducing greenhouse gas (GHG) <br />emissions. Adaptation is the process of responding to the effects of climate change by modifying systems <br />and behaviors to function in a warmer climate. <br />In the water sector, climate change mitigation is generally achieved by reducing energy use, increasing <br />energy efficiency, and/or substituting fossil fuel -based energy sources for renewable energy sources. <br />Because water requires energy to move, treat, use, and discharge, water conservation results in energy <br />conservation. Adaptation initiatives include diversification of the City's water supply portfolio and <br />expanding recycled water use. <br />WEST YOST 3-5 City of Pleasanton <br />2020 Urban Water Management Plan <br />May 2021 <br />