Laserfiche WebLink
Santa Ana 2020 Water Shortage Contingency Plan <br />3-3 <br />Figure 3-1: Annual Assessment Reporting Timeline <br />3.2.2 Data and Methodologies <br />The following paragraphs document the key data inputs and methodologies that are used to evaluate the water <br />system reliability for the coming year, while considering that the year to follow would be considered dry. <br />Assessment Methodology <br />The City will evaluate water supply reliability for the current year and one dry year for the purpose of the Annual <br />Assessment. The Annual Assessment determination will be based on considerations of unconstrained water <br />demand, local water supplies, MET imported water supplies, planned water use, and infrastructure <br />considerations. The balance between projected in-service area supplies, coupled with MET imported supplies, <br />and anticipated unconstrained demand will be used to determine what, if any, shortage stage is expected under <br />the WSCP framework as presented in Figure 3-2. The WSCP’s standard shortage stages are defined in terms of <br />shortage percentages. Shortage percentages will be calculated by dividing the difference between water supplies <br />and unconstrained demand by total unconstrained demand. This calculation will be performed separately for <br />anticipated current year conditions and for assumed dry year conditions.