Energy for water and water for energy on Maui Island, Hawaii

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Energy for water and water for energy on Maui Island, Hawaii
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Energy and water systems are interconnected. This work first characterizes 2010 primary energy demand for direct water services and local freshwater demand for energy on Maui Island, Hawaii, then investigates scenarios for future changes in these demands. The goal of this manuscript is to dissect the relationship and trends of energy–water connections to inform policymaking decisions related to water and energy planning. Analysis proceeds by inventorying water and energy flows and adjusting to a 2010 base year, then applying intensity factors for energy or water used at a given stage for a given sector to determine absolute energy and water demands for the isolated system of Maui Island. These bottom-up, intensity-based values are validated against published data where available. Maui consumes about 0.05% of its freshwater for energy (versus >6% for the US on average) and about 32% of its electricity (19% of its on-island primary energy) for direct water services (versus 8% of primary energy for the US on average). These values could change with policy choices like increased instream flows, higher wastewater treatment standards, electricity fuel mix changes, desalination, or increased biofuels production. This letter contributes a granular assessment of both energy for water and water for energy in a single isolated system, highlighting opportunities to address energy–water interdependencies in a context that could be relevant in other communities facing similar choices.

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water and water systems use energy understanding how much each system uses the other is important for planners seeking to improve resilience by learning from experience in other places work characterizes the interconnections between energy and water systems for my island Hawaii as of 2010 with the hope of offering insights that will be useful in other regions Our work finds that well now is energy
system is unusually water independent water system is unusually energy dependence because of its reliance on imported oil for electricity which is unusual in the United States now energy is among the most expensive in the nation the energy sector's demand for water could grow with biofuel use which could mean increased competition for resources while water is abundant on the island overall people and farms are concentrated in the drier parts of the island pumping moving and treating water from the source to the end user on the mountainous island requires non-trivial amounts of energy in parallel mode is increasingly seeking to protect its unique environment by allowing more less energy-intensive sources of water to remain in streams for habitat and livelihoods and by demanding a higher standard of treatment for wastewater to protect the coastal environments both of these commitments will tend to raise the energy intensity of my water similarly the water sectors demand for energy is gaining scrutiny online yeah and relies primarily on imported fuels but concerns about climate change and self-reliance in that knowledge is moving toward using more local renewable fuels 1 possible option is to convert existing sugar crops to biofuel crops which may not increase water demand overall but would mean committing water
supplies to energy systems and increasing the risk of drought impacting energy systems to analyze the amount of energy used for malice water systems and the amount of water used for mines energy systems reverse cataloged all of my eyes water those using data from reports and interviews as this figure shows the most
water use is surface water for agriculture this cattle and helped us identify nodes where energy is used for water such as for groundwater pumping water treatment for wastewater treatment we also can clearly understand where water systems not use much
energy such as gravity-fed surface water irrigation systems that do not require treatment the scoping also helped identify where water is used for energy notably in the form of cooling water in the industrial sector Our analysis finds that most users about 32 per cent of its electricity or 19 per cent of its primary energy for water services about 2 and a half times the United States average in 2010 most of this use
was for residential and agricultural uses most of the users dedicated to end users like heating water which is consistent with other studies energy is used differently when water services are directly used by people as the washing and cooking versus water services for industry like agricultural irrigation these differences suggest the policy letter should be different for these demand types by contrast now uses much less than 1 per cent of its fresh water for energy systems considerably less than the roughly 6 per cent US average while energy system dependence on water is currently low the relationship could change with increased use of biofuels my island uses much more of its energy for water but much less of its water for energy compared with other U.S. communities Meyer is currently enacting policy changes that other communities are likely to see in such as reducing surface water consumption and increasing wastewater treatment standards to protect the environment and weighing options increased use of local renewable energy possibly including variegated biofuels because my the relevant case study for decision makers working on energy water access issues we intend the findings from this assessment to be useful for planners in other regions this research was supported by the will of one-dimensional the


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