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75E - PH - WATER MANAGEMENT PLAN
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75E - PH - WATER MANAGEMENT PLAN
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6/2/2016 4:41:33 PM
Creation date
6/2/2016 4:18:02 PM
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City Clerk
Doc Type
Agenda Packet
Agency
Public Works
Item #
75E
Date
6/7/2016
Destruction Year
2021
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2015 URBAN WATER MANAGEMENT PLAN <br />we <br />5.1 Overview <br />In connection with recent water supply challenges, the State Water Resources Control Board found that <br />California has been subject to multi -year droughts in the past, and the Southwest is becoming drier, <br />increasing the probability of prolonged droughts in the future. Due to current and potential future water <br />supply shortages, Governor Brown issued a drought emergency proclamation on January 2014 and <br />signed the 2014 Executive Order that directs urban water suppliers to implement drought response plans <br />to limit outdoor irrigation and wasteful water practices if they are not already in place. Pursuant to <br />California Water Code Section 106, it is the declared policy of the state that domestic water use is the <br />highest use of water and the next highest use is irrigation. This section describes the water supply <br />shortage policies Metropolitan and the City have in place to respond to events including catastrophic <br />interruption and reduction in water supply. <br />5. 2 Shart ge Actions <br />5.2.1 Metropolitan Water Surplus and Drought Management Plan <br />Metropolitan evaluates the level of supplies available and existing levels of water in storage to determine <br />the appropriate management stage annually. Each stage is associated with specific resource <br />management actions to avoid extreme shortages to the extent possible and minimize adverse impacts to <br />retail customers should an extreme shortage occur. The sequencing outlined in the Water Surplus and <br />Drought Management (WSDM) Plan reflects anticipated responses towards Metropolitan's existing and <br />expected resource mix. <br />Surplus stages occur when net annual deliveries can be made to water storage programs. Under the <br />WSDM Plan, there are four surplus management stages that provides a framework for actions to take for <br />surplus supplies. Deliveries in DVL and in SWP terminal reservoirs continue through each surplus stage <br />provided there is available storage capacity. Withdrawals from DVL for regulatory purposes or to meet <br />seasonal demands may occur in any stage. <br />The WSDM Plan distinguishes between shortages, severe shortages, and extreme shortages. The <br />differences between each term is listed below. <br />Shortage: Metropolitan can meet full- service demands and partially meet or fully meet interruptible <br />demands using stored water or water transfers as necessary. <br />• Severe Shortage: Metropolitan can meet full- service demands only by using stored water, transfers, <br />and possibly calling for extraordinary conservation. <br />• Extreme Shortage: Metropolitan must allocate available supply to full- service customers. <br />There are six shortage management stages to guide resource management activities. These stages are <br />defined by shortfalls in imported supply and water balances in Metropolitan's storage programs. When <br />Metropolitan must make net withdrawals from storage to meet demands, it is considered to be in a <br />shortage condition. Figure 5 -1 gives a summary of actions under each surplus and shortage stages when <br />arcadis.com 75E-62 <br />5 -1 <br />
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