Du Recharge

Gold is used in minute quantities in circuit boards for electric vehicles. Although more costly than its counterparts, in a recent discovery researchers determined that gold nanowires can be used to store electricity and create batteries that last 400 times longer than traditional lithium batteries. Gold nanowires are able to cycle through 200,000 recharges without significant corrosion or decline.

MAR is a term that covers artificial recharge, aquifer storage and recovery, riverbank and riverbed filtration, groundwater banking, and other mechanisms of purposeful water recharge to aquifers for later recovery. MAR use has grown rapidly over the last two decades, progressing from an often-experimental concept to a management tool used in over 1000 sites around the world.

Du Recharge

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New research by Water in the West shows that groundwater recharge is a cheaper alternative to surface storage. In fact, researchers found that the cost of recharge is cheaper than many other water supply options at $90 to 1,100 per acre-foot, or at a median cost of $390 per acre-foot, which broadly agrees with published values.

Groundwater recharge can act as a barrier to seawater intrusion in coastal basins and to the migration of contaminants. Other potential benefits include improving flows in rivers and streams, flood control, and wildlife and bird habitat.

Natural recharge is simply rain and streamflow that soaks into the ground to an underlying aquifer. Unfortunately, urban development often creates hard surfaces such as roads, rooftops, and parking lots that prevent rain from soaking back into the ground. While there is an increasing focus on identifying and protecting groundwater recharge zones (areas where the recharge to underlying basin is highest) these measures are often not enough to prevent chronic groundwater depletion.

In addition to having the right conditions for recharge, other critical elements must be in place: funding, permitting, and oversight by a water agency or entity to manage the operations and allocations.

Although relatively cheap, the costs of groundwater recharge and storage can still outstrip the finances of local communities. State assistance has therefore been critical in supporting local entities for water management, including recharge projects.

Research by Water in the West shows that state grants have provided an estimated $1.15 billion (2014 dollar value) in total funding for groundwater recharge and storage projects. Financing for these projects has come from several voter-approved bonds: Propositions 84, 1E, 50 and 13. Proposition 13 was solely dedicated to groundwater recharge and storage; the others were for general water management programs that integrated groundwater recharge and storage into projects.

In order to gain a better understanding of recharge projects in California and their role in groundwater management, Water in the West researchers obtained all available grant applications submitted to the Department of Water Resources for the four recharge-related grant programs listed above. This new study evaluated 136 grant applications filed over the past 14 years that were wholly or partly devoted to recharge. Funding requests ranged from feasibility studies and planning to construction.

Based on the grant applications obtained by Water in the West, the anticipated annual recharge capacity of funded projects is 306,727 acre-feet per year. However, if we consider both the awarded and declined recharge applications studied, the recharge potential is closer to 785,000 acre-feet per year.

The 78 awarded projects we studied were awarded at different funding levels. This map shows all grant proposals sized by their requested budget and shaded by granted percentages, including unfunded applications (0%). The number of unfunded and partially funded applications is evidence of unfulfilled need for recharge across the state.

The overlap of recharge projects with overdrafted groundwater basins suggests that there is capacity for recharge in many areas and there is interest in using recharge as a tool to address local needs and concerns.

There was considerable diversity in the purpose of the recharge-related projects submitted for grant funding. Some recharge projects would help replenish local groundwater supplies during wet years, so that it can be utilized during dry periods (i.e. conjunctive use and/or groundwater banking) while others would help mitigate land subsidence.

Some projects requested funding to buy and regrade land for recharge ponds. Others wanted to establish a groundwater bank. Some projects appeared to frame recharge as an ancillary benefit to maintenance work like dredging silt from reservoirs.

Water in the West's new research findings highlight the potential for groundwater recharge and storage to improve water reliability and security in California. However, several factors must be addressed at the local, regional, and state levels in order to take advantage of the opportunities that groundwater recharge presents.

Groundwater management is needed to ensure sustainability of groundwater resources. A number of groundwater districts have been doing this successfully for decades. Without some ability to manage groundwater demand, some agencies may be reluctant to implement recharge programs.

Funding is necessary to supplement local resources for recharge projects in many places and to aid in the implementation of groundwater management goals. Besides bonds, options for water funding include increasing the state sales tax, levying a statewide surcharge on water utility bills, providing groundwater management agencies the authority to levy fees on pumpers or other water users, or a combination of these options.

Data needs and sharing are crucial for improved groundwater management. Information on groundwater levels, along with increased transparency and accessibility of existing data, are necessary to to prioritize recharge needs and locations.

Regulatory certainty is key to investing in groundwater recharge and storage in order to guarantee that users who put water into the aquifer will be able to retrieve their investment in the future.

Research into potential issues around groundwater recharge is needed, both statewide and for individual basins, to ensure the successful implementation of recharge projects. Questions of groundwater contamination, impacts of surface flood flow diversions on groundwater-dependent ecosystems, and chemical interactions between recharge water and aquifer water are a few issues that need to be identified and studied moving forward.

Groundwater recharge will undoubtedly play an important role as part of a diversified water supply portfolio for California. It is proven, cost effective and presents a significant opportunity to help prepare the state for drier times that are sure to come. But how quickly?

Creating a more robust and cost-effective water supply option through local groundwater recharge for communities to reduce their dependence on imported water, which can be expensive and unreliable during drought.

[2] In order to simplify the recharge process, the following waste streams have been combined into one consolidated waste stream: Lab chemicals; Reactives and non-recyclable mercury; Contaminated Debris and sharps; Consolidated solvents, paints, oils, and misc liquids; and batteries.

[1] The Fire Prevention Division's main areas of activity involve work associated with the Fire and Life Safety: Construction Services program and Fire and Life Safety: Non-State Supported (NSS) Facilities/Services program. Under the Fire Prevention recharge, we segregate the two recharge groups based on application of either Title 24 or Title 19. Methodology for determining rates has been the same for multiple years and previously approved by the campus recharge committee. The Fire and Life Safety recharge program uses the simple hourly rate method of calculating recharge rates, for both Construction Services and for Fire and Life Safety Services to Non-State Supported organizations.

A recharge rate is developed using projected accumulated costs (both labor and non-labor expenses) and usage. Please review the Service Center Guidance and the Recharge Rate Worksheet for additional information.

Recharge Centers are operating units that provide goods and services and have total annual revenue (internal and external) of less than $2 million. The establishment of a recharge center should be coordinated with the Cost Analysis Office. For the full recharge center policy click here. For recharge center worksheets, click here.

Aquifer recharge (AR) and aquifer storage and recovery (ASR) are manmade processes or natural processes enhanced by humans that convey water underground. The processes replenish ground water stored in aquifers for beneficial purposes. Although AR and ASR are often used interchangeably, they are separate processes with distinct objectives. AR is used solely to replenish water in aquifers. ASR is used to store water, which is later recovered for use.

All recharge operations must comply with federal regulations regardless of whether or not they directly charge federal awards. Therefore, the purpose of the procedure manual is to provide guidance to administrators of recharge operations by detailing how to properly establish, maintain, and account for these operations in accordance with federal regulations and University policies.

In an effort to enhance University compliance surrounding recharge operations, Financial Services has developed a uniform recharge rate template. The rate template must be completed annually for each active recharge operation and at the inception of a new recharge. The recharge must also complete a recharge questionnaire that describes the operation. The questionnaire is completed once by the recharge and only updated if there are changes. The recharge is responsible for informing Financial Services of any changes. Pass Through recharges are not required to complete a questionnaire or annual recharge rate template but must complete an annual Pass Through Confirmation Form. ff782bc1db