10 Multi-Benefit Resources

The Untapped Potential of California’s Water Supply: Efficiency, Reuse, and Stormwater – Issue Brief

Author: Gleick et al., Pacific Institute, NRDC (2014)
Geography: Western U.S.
Level of Detail: Case study, Qualitative description

Availability: Publicly Available

Water Management Strategies: Agricultural efficiency, Commercial or industrial reuse, Delivery system efficiency, Distributed Stormwater Infrastructure, Indirect potable reuse, Infiltration and filtration, On site nonpotable reuse, Runoff storage, Urban and industrial nonpotable reuse, Urban indoor efficiency, Urban outdoor efficiency, Water Conservation and Efficiency, Water Reuse

Specific Benefits or Trade-offs: Ambient water quality, Demand reduction, Energy, Energy for water extraction, GHG emissions, Land and environment, Local economy, People and Community, Risk and Resilience, Supply augmentation, Water quality, Water Supply, Water supply reliability

Increased pressures on Californias water supply, including from population growth and intense periods of drought exacerbated by climate change, are leading to the overuse of surface water and groundwater. But with existing technology and conservation methods, the state can take vital steps to improve its resilience to drought and plan for a more sustainable water future. This issue brief, produced in collaboration with the Natural Resources Defense Council, is a statewide analysis of the potential for improved efficiency in agricultural and urban water use, water reuse and recycling, and increased capturing of local rainwater.

Co-benefits Assessment Methodology for Water Savings

Author: California Air Resources Board (2018)
Geography: Western U.S.
Level of Detail: Quantitative benefits

Availability: Publicly Available

Water Management Strategies: Agricultural efficiency, Agricultural land management, Distributed Stormwater Infrastructure, Environmental Remediation, Land Management, Low impact landscaping, Urban indoor efficiency, Urban outdoor efficiency, Water Conservation and Efficiency

Specific Benefits or Trade-offs: Demand reduction, Supply augmentation, Water Supply

Co-benefits Assessment Methodology for Water Savings presents three different water co-benefit assessment methods for three types of projects from the California Climate Investments. The three project types are agricultural irrigation, residential, commercial, or institutional water efficiency, and urban landscaping. The assessment methods are presented from a California perspective, however, the same methods could be applied in different locations with appropriate modifications for climate and other relevant factors.

Embedded Energy in Water Studies 1, 2 and 3

Author: California Public Utilities Commission (CPUC) (2010)
Geography: Western U.S.
Level of Detail: Case study, Quantitative benefits

Availability: Publicly Available

Water Management Strategies: Agricultural efficiency, Brackish desalination, Centralized Stormwater Infrastructure, Centralized wastewater treatment, Commercial or industrial reuse (on-site), Delivery system efficiency, Desalination, Direct potable reuse, Distributed Stormwater Infrastructure, Flood Control, Groundwater extraction, Groundwater Management, Groundwater recharge, Groundwater storage, Indirect potable reuse, Industrial treatment (on-site), Seawater desalination, Surface Water Storage, Urban and industrial nonpotable reuse, Urban indoor efficiency, Urban outdoor efficiency, Wastewater Treatment, Water Conservation and Efficiency, Water Reuse, Water Transfer

Specific Benefits or Trade-offs: End use energy, Energy, Energy for wastewater, Energy for water extraction, Energy for water treatment

CPUCs Embedded Energy in Water Studies provide a California statewide assessment of energy use by the water sector and energy use by water customers. There are three separate reports, each including supporting appendices and materials, that document methodology, data collection, case studies, and findings of the investigation.

Sustaining California Agriculture in an Uncertain Future

Author: Cooley, Christian-Smith, & Gleick, Pacific Institute (2009)
Geography: Western U.S.
Level of Detail: Quantitative benefits

Availability: Publicly Available

Water Management Strategies: Agricultural efficiency, Water Conservation and Efficiency

Specific Benefits or Trade-offs: Agriculture, Demand reduction, Energy, Energy for water extraction, Habitat and biodiversity, In stream flows, Land and environment, Local economy, People and Community, Risk and Resilience, Soil health, Supply augmentation, Water quality, Water Supply, Water supply reliability

Sustaining California Agriculture in an Uncertain Future examines the potential for agricultural efficiency in California. The report qualitatively and quantitatively explores the potential for water conservation and efficiency under the following management strategies: 1) efficient irrigation technology, 2) improved irrigation scheduling, and 3) regulated deficit irrigation. All three options show significant water savings as well as provide various co-benefits including, reduced water and energy costs, improved crop quality and yield,improved soil health, reduced vulnerability to drought, increased revenues, improved water quality, improved quantity and timing of instream flows, and fish and wildlife benefits.

Leveraging Sustainable Irrigated Agriculture via Desalination: Evidence from a Macro-Data Case Study in Israel

Author: Raveh & Ben-Gal, (2018)
Geography: Outside U.S.
Level of Detail: Case study, Quantitative benefits

Availability: Publicly Available

Water Management Strategies: Agricultural efficiency, Agricultural nonpotable reuse, Brackish desalination, Desalination, Seawater desalination, Water Conservation and Efficiency, Water Reuse

Specific Benefits or Trade-offs: Agriculture, Land and environment

Leveraging Sustainable Irrigated Agriculture via Desalination: Evidence from a Macro-Data Case Study in Israel examines the effects of desalinated water on agricultural crops in Israel. The study presents data on salt levels in different agricultural crops before and after watering with desalination plant water. The results showed measurable and significant decreases in sodium (Na), chloride (Cl), and magnesium (Mg) compared to when the crops were watered using irrigation. This reduction of salts in the crops provides a benefit because the high levels of salts in irrigated water sources was causing crop health issues.

Agricultural Water Conservation and Efficiency Potential in California

Author: NRDC, Pacific Institute (2014)
Geography: Western U.S.
Level of Detail: Qualitative description

Availability: Publicly Available

Water Management Strategies: Agricultural efficiency, Water Conservation and Efficiency

Agricultural Water Conservation and Efficiency Potential in California outlines the benefits of improving agricultural efficiency in California. The benefits cited include reduced consumptive use, improved water quality and instream flow, energy savings, increased yields, improved crop quality, reduced fertilizer, water, and energy costs, improved reliability of existing supplies, management flexibility, improved downstream water quality, and enhanced recreation.

Energy Down the Drain: The Hidden Costs of California’s Water Supply

Author: Cohen, Nelson, & Wolff, NRDC, Pacific Institute (2004)
Geography: Western U.S.
Level of Detail: Qualitative description

Availability: Publicly Available

Water Management Strategies: Agricultural efficiency, Delivery system efficiency, On site nonpotable reuse, Urban and industrial nonpotable reuse, Urban indoor efficiency, Urban outdoor efficiency, Water Conservation and Efficiency, Water Reuse

Specific Benefits or Trade-offs: Air quality, Ambient water quality, Demand reduction, Energy, Energy production, Habitat and biodiversity, Land and environment, Risk and Resilience, Water quality, Water Supply, Water supply reliability

Energy Down the Drain: The Hidden Costs of California’s Water Supply analyzes the connections between power and water resources in California. The report presents several key findings: 1) water conservation lowers energy use and energy bills, 2) water recycling is a highly energy efficient water source, 3) retiring agricultural land may increase energy use if the water is transferred to other agricultural or urban uses, 4) Retiring agricultural land can save energy if the water is dedicated to the environment, and 5) diverting water above dams costs an enormous amount of power and money. Based on these findings it is recommended that decision makers better integrate energy into water policy decision-making, as well as give water conservation higher priority.

Water-use efficiency and productivity: rethinking the basin approach

Author: Gleick, Smith, & Cooley, (2011)
Geography: Global
Level of Detail: Qualitative description

Availability: Paywall

Water Management Strategies: Agricultural efficiency, Delivery system efficiency, Urban indoor efficiency, Urban outdoor efficiency, Water Conservation and Efficiency

Specific Benefits or Trade-offs: Ambient water quality, Demand reduction, Drinking water quality, End use energy, Energy, Risk and Resilience, Water quality, Water Supply, Water supply reliability

Water-use efficiency and productivity: rethinking the basin approach is a response to a paper in Water International. The paper highlights major components of inefficient water use that were ignored, examines water productivity rather than just water efficiency, and discusses co-benefits. The co-benefits of water-use efficiency examined are improved water quality, increased production, improved water supply reliability, decreased energy demands, and reduced or delayed infrastructure investments.

Water Efficiency for Instream Flow: Making the Link in Practice

Author: Alliance for Water Efficiency, American Rivers, Environmental Law Institute (2011)
Geography: Western U.S.
Level of Detail: Qualitative description

Availability: Publicly Available

Water Management Strategies: Agricultural efficiency, Delivery system efficiency, Urban indoor efficiency, Urban outdoor efficiency, Water Conservation and Efficiency

Specific Benefits or Trade-offs: Demand reduction, In stream flows, Land and environment, Reputation, Risk and Resilience, Water Supply, Water supply reliability

Water Efficiency for Instream Flow: Making the Link in Practice examines the potential for linking water efficiency efforts to improving instream flows within the Colorado River Basin. The report concludes that improving water efficiency can allow for population and economic growth without requiring a large investment in new or expanded water supplies or wastewater. It also concludes that environment and state regulatory requirements can drive water efficiency efforts. The report includes a qualitative discussion on the following benefits: reduced surface or groundwater withdrawals, operational flexibility for water utility, and instream flows.

California Water Plan, Update 2009, Volume 2: Resource Management Strategies

Author: California Department of Water Resources (2009)
Geography: Western U.S.
Level of Detail: Decision support tool, Qualitative description

Availability: Publicly Available

Water Management Strategies: Agricultural efficiency, Agricultural land management, Brackish desalination, Centralized Stormwater Infrastructure, Centralized wastewater treatment, Delivery system efficiency, Desalination, Direct potable reuse, Drywells, Groundwater extraction, Groundwater Management, Groundwater recharge, Groundwater storage, Indirect potable reuse, Land Management, Recharge area protection, Reforestation and forest conservation, Riparian buffers, Seawater desalination, Spreading basins, Storm drains and pipes, Stream protection and restoration, Surface Water Storage, Urban indoor efficiency, Urban outdoor efficiency, Wastewater Treatment, Water Conservation and Efficiency, Water Reuse, Water Transfer, Wetland protection and restoration

Specific Benefits or Trade-offs: Demand reduction, Extreme events, Flooding, Habitat and biodiversity, Land and environment, People and Community, Recreation, Risk and Resilience, Supply augmentation, System resilience, Water quality, Water Supply, Water supply reliability

The California Water Plan presents a guide on water management strategies that can provide multiple benefits both regionally and statewide in California. The management strategies are organized by goals, such as reducing water demand, improving operational efficiency, or improving water quality, and the benefits are categorized under water supply, drought preparedness, water quality, operational flexibility, flood impacts, environmental benefits, energy benefits, recreation, and groundwater overdraft risk. The report also includes guidance on the quantitative analysis of multiple benefits for policymakers and water resource managers.