UWM Plan - Municipal Water District of Orange County

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• Gain of Local Supply Adjustment: This adjustment accounts for planned or scheduled gains in local supply production above the base period, which are not due to extraordinary actions to increase water supply in the allocation year. Gains of local supply include increases in groundwater production that do not result in the mining of a groundwater basin, new brackish water treatment facilities, or increases to surface water supplies due to changes in hydrology. These are considered planned and scheduled increases in local supply production, which are added to the base period local supplies. • Loss of Local Supply Adjustment: This adjustment accounts for losses of local supply production from the base period. Losses of local supply due to hydrology or water quality are subtracted from the Base Period Local Supplies. They cannot be used to cover IAWP shortages. • Extraordinary Increased Production Adjustment: This adjustment accounts for extraordinary increases in local supplies above the base period. Extraordinary increases in production include such efforts as purchasing transfers or mining of groundwater basins. In order not to discourage such extraordinary efforts, only a percentage of the yield from these supplies is added back to Allocation Year Local Supplies in shortage level 3 and beyond as shown below. This has the effect of “setting aside” the majority of the yield for the agency who procured the supply. The percentage of the extraordinary increases in local supply corresponds according to the regional shortage level. Regional Shortage Level Table 4.1 Extraordinary Increased Production Adjustment Regional Shortage Percentage Extraordinary Increase Percentage 1 5% 0% 2 10% 0% 3 15% 15% 4 20% 20% 5 25% 25% 6 30% 30% 7 35% 35% 8 40% 40% 9 45% 45% 10 50% 50% Step 3 – Calculate Initial Minimum Allocation Based on Declared Shortage Level This step sets the initial allocation. After a regional shortage level is established, MWDOC will calculate the initial allocation as a percentage of adjusted Base Period Imported needs within the model for each client agency. MWDOC Water Supply Allocation Plan Page 11
Shortage Levels: The model allocates shortages of supplies over ten levels: from 5 to 50 percent, in 5 percent increments. Shortage Percentage: The maximum total regional shortage percentage of MWDOC’s available supplies when compared to the sum of the demands in the allocation year. Wholesale (“Imported”) Supply Minimum Allocation: The Wholesale Minimum Allocation is established to ensure a minimum level of imported supplies. The Wholesale Minimum Allocation ensures that client agencies will not experience shortages on the wholesale level that are greater than one-and-a-half times the percentage shortage of Metropolitan’s regional water supplies. As illustrated below, the Wholesale Minimum Allocation percentage is equal to 100 minus one-and-a-half times the shortage level. The allocation is based on each agency’s demand of firm MET water. Table 4.2 Wholesale (“Imported”) Supply Minimum Allocation Regional Shortage Level Regional Shortage Percentage Wholesale Minimum Allocation 1 5% 92.5% 2 10% 85.0% 3 15% 77.5% 4 20% 70.0% 5 25% 62.5% 6 30% 55.0% 7 35% 47.5% 8 40% 40.0% 9 45% 32.5% 10 50% 25.0% Step 4 – Assign Allocation Adjustments and Conservation Credit In this step, the model assigns additional water to address disparate impacts at the retail level caused by an across-the-board cut of imported supplies. It also applies a conservation credit given to those agencies that have achieved additional water savings at the retail level as a result of successful implementation of water conservation devices, programs and rate structures. Retail Impact Adjustment: The Retail Impact Adjustment is the factor used to address major differences in retail level shortages associated with across-the-board cuts. The purpose of this adjustment is to ensure that agencies with a high level of dependence on MET do not experience highly disparate shortages compared to other agencies when faced with a reduction in imported supplies. The Retail Impact Adjustment factor is calculated as the difference between the Regional Shortage Percentage and the Wholesale Imported Minimum Allocation. The amount of the adjustment each client agency receives is prorated on a linear scale, based on its dependence on imported MWDOC Water Supply Allocation Plan Page 12
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Municipal Water District of Orange
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Table of Contents Contents Executiv
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Table of Contents 6. Recycled Water
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Table of Contents List of Figures F
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Acronyms GAC GAP GMFP GPCD gpm GRF
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Message from the Board of Directors
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Executive Summary • Offer opportu
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Executive Summary When comparing su
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Executive Summary • Promoting par
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1. Introduction 1.1. Urban Water Ma
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Section 1 Introduction • Long-ran
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Section 1 Introduction term by vote
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Section 1 Introduction For more tha
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Section 1 Introduction Orange Count
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Section 2 Water Demand 600,000 2.5
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Section 2 Water Demand Table 2-1: C
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Section 2 Water Demand used to fill
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Section 2 Water Demand Baseline and
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Section 2 Water Demand o 10 percent
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Section 2 Water Demand These target
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Section 2 Water Demand under SBx7-7
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Section 2 Water Demand Legislation
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3. Water Sources and Supply Reliabi
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Section 3 Water Sources and Supply
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State Water Project Programs and Lo
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3.3.8. Recharge Facilities for OCWD
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4. Demand Management Measures 4.1.
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4.2. BMP Implementation in MWDOC Se
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Section 4 Demand Management Measure
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4.2.4. DMM 4: Metering with Commodi
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Section 5 Water Supplies Contingenc
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6. Recycled Water 6.1. Agency Coord
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Section 6 Recycled Water outfalls a
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Section 6 Recycled Water IRWD’s r
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Section 6 Recycled Water IRWD Los A
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Section 6 Recycled Water OCWD Groun
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6.4.2. Indirect Potable Reuse Secti
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7. Future Water Supply Projects and
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Section 7 Future Water Supply Proje
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Section 8 UWMP Adoption Process Thi
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Page 155 and 156: Appendices A. Urban Water Managemen
Page 157 and 158: CALIFORNIA WATER CODE DIVISION 6 PA
Page 159 and 160: and county, city, regional agency,
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Page 163 and 164: dated December 10, 2008, as it may
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Page 167 and 168: service area at the end of 5, 10, 1
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Page 171 and 172: "Memorandum of Understanding Regard
Page 173 and 174: Demand “Bump” Factors for 2010
Page 175 and 176: Table 1. Per-Capita Retail Water Us
Page 177 and 178: Appendix C California Urban Water C
Page 179 and 180: Agency: Municipal Water District of
Page 185 and 186: Urban Water Management Plan checkli
Page 187 and 188: Calif. Water No. UWMP requirement a
Page 193 and 194: Municipal Water District of Orange
Page 195 and 196: List of Tables and Figures TABLES T
Page 197 and 198: Section 2: Metropolitan Water Distr
Page 199 and 200: Section 3: Development Process In p
Page 201 and 202: MWDOC’s allocation plan. Moreover
Page 203: Base Period Interim Agricultural Wa
Page 207 and 208: to 2008; in order to incorporate th
Page 209 and 210: Section 5: Plan Implementation This
Page 211 and 212: agencies and Board Committee member
Page 213 and 214: Tracking and Reporting In preparing
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Page 217 and 218: Appendix A List of Acronyms: AF- Ac
Page 219 and 220: Appendix C MWDOC Growth Adjustment
Page 221: Appendix F Letters of Notification
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Appendix H Resolution of Adoption o
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8001 Irvine Center Drive, Suite 110
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UWM Plan - Municipal Water District of Orange County

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