Exec Summary Report_11-15-04

• Basin: Statewide
• Title: SWSI Phase 1 Report - Executive Summary
• Date: 11/15/2004
• Author: CWCB
• SWSI - Doc Type: Final Report

Executive Summary
Table ES-5 Potential Benefits and Issues of Families of Options for Resolving Supply and Demand Gaps
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Conservation Options
Active Municipal & Industrial Conservation ^ Implementation costs can be significantly ~. May result in demand hardening and
Measures lower than new water supply development decrease supply reliabiliiy if conserved
^ No permit requirements to implement water is used for new growth and water
Examples: ^ Implementation is within control of the restrictions are needed during droughts
. Metering water provider and does not require . Customers may be unwilling to accept
. Increasing water rate pricing approval of other entities mandated conservation measures
^ Rebates for efficient water using ^ No new diversions required from rivers or ^ Impacts on utiliiy revenues as a result of
appliances streams reduced demand
^ Incentives for reducing high water use ^ Can stretch existing supplies ^ Loss of return flow credits that must be
landscaping ^ Potential water qualiiy benefits replaced with other sources
^ Restrictions on amount of lawn area ^ Lesser environmental impacts than new ^ May not increase supplies for providers
storage with augmentation plans if they receive full
^ Can reduce water and wastewater credit for all return flows
treatrnent, distribution, and collection ^ Some urban water providers may be at a
capital and operations and maintenance high level of conservation
costs
Agricultural Efficiency Measures ^ Can stretch existing supplies ^ Loss of return flows may impact
^ May reduce non-crop consumptive use downstream water rights and environment
Examples: . Potential water qualiiy benefits . Ability to pay
^ Ditch lining ^ No new diversions required from rivers or ^ Water rights limitations, cannot sell or
^ Conversion of flood irrigation to gated pipe streams transfer salvaged or saved water
. Installation of sprinklers . No permit requirements to implement . Potential compact issues
^ May increase downstream calls
^ May result in an unauthorized increase in
CU in historically water short systems
^ May impact groundwater tables and wells
in the area
Agricultural Transfers
Permanent Agricultural Transfer ^ Permanent water right ^ Local socio-economic impacts as a result
^ Usually more senior water rights with of dry-up of agricultural lands
The acquisition of agricultural water rights greater reliability and less storage required ^ Dry-land has a substantially lower
and the cessation of irrigation on these to produce a firm annual yield assessed value than irrigated agricultural
historically irrigated lands. Water rights are ^ Simpler permitting than a new reservoir land, which affects local tax revenue
transferred to other uses. storing new water rights ^ Water court procedure required to change
^ Does not increase depletions within the the use of agricultural water rights
basin ^ Revegetation of lands to be dried up
^ Return flows from the historic consumptive required under certain circumstances
use are consumable and can be reused ^ Potential loss of open space
^ Lesser environmental impacts than a new ^ Potential loss of wetlands and riparian
water storage project habitat
^ Approximately 3 AF of storage is required
to produce 1 AF of firm annual yield for M&I
use
^ May impact groundwater tables and wells
in the area unless historical returns are
made in the exact location
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