![]() The reality behind closed doors is something else entirely. Jillian Kane appears to have it all - a successful career, a gorgeous home, a loving husband, and two wonderful children. If I leave, he'll destroy Addie and Drew. UC Davis researchers conducted the study using data provided by LADWP’s Office of Sustainability, Efficiency Solutions Engineering and the Water System’s Resource Development & Watershed Management.If I stay, he will kill me. “We hope utilities and agencies will recognize this win-win scenario and allocate energy efficiency dollars to water conservation.” “This study is highly relevant to both water and energy utilities, as well as government agencies with mandates to sustainably manage water supplies, achieve energy efficiency savings, and reduce GHG emissions,” said author Frank Loge, a professor in the UC Davis Civil and Environmental Engineering Department and director of the Center for Water-Energy Efficiency. This study may serve as a framework for multi-agency, inter-regional water conservation programs. While each local utility, such as LADWP, will gain a certain amount of energy savings by reducing energy-intensive water operations, these savings become more significant at the state-wide level. Cooperation is keyĪnother key takeaway from the study is the importance of establishing an appropriate system boundary for evaluating program performance. LADWP’s Sustainability Office and the Water System administers a variety of energy-saving and water conservation rebates and programs for residential and commercial customers. “This fruitful collaboration with UC Davis has given us valuable data we can use to effectively allocate resources and programs to better serve our customers.” “Although LADWP has been focused on water conservation and the developing local water resources for quite some time, this study validates our efforts and really highlights the added benefit of reducing energy intensive water operations and related greenhouse gas emissions,” said Nancy Sutley, LADWP Senior Assistant General Manager of External and Regulatory Affairs and Chief Sustainability Officer. Across the various scenarios, the estimated energy savings secured through water conservation programs (e.g., high-efficiency washing machines, toilets/urinals and irrigation systems) was cost-competitive with LADWP’s energy efficiency programs (e.g., more efficient lighting, HVAC and refrigeration systems). The study found that LADWP saved a considerable amount of energy through its water conservation programs. Researchers also analyzed data on the costs and estimated savings of LADWP's water conservation and energy efficiency programs. The first directly assessed the LADWP service territory the second had an expanded boundary that included LADWP’s imported water infrastructure systems and the third was a broader estimate for the entire regional hydrologic zone. UC Davis applied three different estimates of energy intensity, which is the amount of energy embedded within water. A system of water pumps delivers water to the LA basin from as far away as the Sacramento River in Northern California and Lake Havasu in Arizona. Unlike the LA Aqueduct, which is completely gravity-driven and actually produces electricity as water passes through hydroelectric plants, the State Water Project and the Colorado River Aqueduct are energy consumers. Los Angeles receives its water from three main sources: the State Water Project, the Colorado River Aqueduct and LADWP’s Los Angeles Aqueduct. “Using LADWP as a case study, we wanted to examine the energy savings secured through water conservation programs relative to energy efficiency programs.” It takes energy to move water “In California we use about 20 percent of statewide electricity and 30 percent of non-power plant natural gas to move, treat, and heat water,” said author Edward Spang, an assistant professor in the UC Davis Food Science and Technology Department and the Center for Water-Energy Efficiency. The study, published in the journal Environmental Research Letters, shows that customer-focused water conservation programs are just as cost-effective (and in some cases, are more cost-effective) as energy efficiency programs in reducing electricity use, GHGs and other energy-intensive operations. This is one of the main conclusions of a study conducted by UC Davis in collaboration with the Los Angeles Department of Water and Power ( LADWP). Conserving water goes beyond just saving water it plays a vital role in conserving energy and reducing greenhouse gas emissions (GHGs).
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