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Section 2 <br />Conservation and Efficiency Technical Roundtable <br />customers) can still achieve behavioral <br />reductions during a shortage. <br />- By modeling the demand impacts of long- <br />termconservation programs on current <br />customers, and the potential for drought <br />curtailment in new and existing customers, <br />it is possible for water providers to <br />determine what portion of achieved <br />conservation savings should be held to <br />maintain (or improve) system reliability and <br />what portion can be used to serve new <br />customers. <br />- Since conservation savings are achieved by <br />existing customers it is important that the <br />supply reliability for these customers not be <br />negatively impacted as new customers are <br />added to a system. <br />4. Matrix by Water Source and Water Right <br />- Table 2-2 presents a simple analysis of the <br />impact of conserved water uses on systems <br />with various water sources and rights. <br />Under this simplified analysis, it is assumed <br />that no new supply is added in any scenario <br />and it is assumed that "Demand" refers to the <br />constrained drought year demands (i.e., the <br />demands the system experiences under a <br />drought with mandatory restrictions in <br />place). Reliability is defined using the basic <br />definition from the beginning of this memo. <br />- In this analysis, some portion of conserved <br />water can be used to serve new customers <br />without negatively impacting reliability as <br />long as the constrained drought demand <br />does not increase. While this is a greatly <br />simplified analysis with significant caveats, <br />it suggests that conserved water is a resource <br />that can be used to serve new customers <br />under the right set of circumstances. This <br />simplified analysis also highlights the <br />importance of considering the unique <br />interplay of demands, supply, and storage on <br />case-by-case bases for each water supply <br />system. <br />2-12 FINAL DRAFT <br />Retrofit Before <br />Retrofit After <br />