Urban Water Management Plan 2015

BMO 2: Groundwater is protected from existing and potential contamination, including salt water intrusion. These BMOs describe the overall goals of the District’s groundwater management program. The basin management strategies are the methods that will be used to meet the BMOs. Many of these strategies have overlapping benefits to groundwater resources, acting to improve water supply reliability, minimize subsidence, and protect or improve groundwater quality. 6.2.2.2 Integrated Water Resource Plan The objective of the Integrated Water Resource Plan (IWRP) is to develop a comprehensive and flexible water supply plan for the County through the year 2040. The IWRP incorporates community input and is capable of responding to changing water supply and demand conditions. The IWRP Preferred Strategy aims to maximize the Districts flexibility to meet actual water demands, and where they match water projections. It relies on practices, such as water banking, recycled water, demand management, and water transfers. It further relies on “core elements” designed to validate baseline planning assumptions, monitor or evaluate resource options, and help meet planning objectives. 6.2.3 Overdraft Conditions Law 10631. (b)(2) For basins that have not been adjudicated, (provide) information as to whether the department has identified the basin or basins as overdrafted or has projected that the basin will become overdrafted if present management conditions continue, in the most current official departmental bulletin that characterizes the condition of the groundwater basin, and a detailed description of the efforts being undertaken by the urban water supplier to eliminate the long-term overdraft condition. The Santa Clara Valley Groundwater Basin is not an adjudicated groundwater basin. According to the DWR 2003 Bulletin 118 the Santa Clara Valley Groundwater Basin is not in a condition of overdraft. In order to reduce the risk of groundwater basin overdraft, a recharge system has been developed by SCVWD. The SCVWD prepared the South County Water Supply Planning Project (July 2010), and as a part of this project, the District implemented the use of the Llagas Groundwater Subbasin Groundwater Model. As part of the modeling approach it was assumed that development in the Coyote Valley subarea would not impact the groundwater conditions of the Llagas subbasin and the findings therefore only relate to the Llagas subbasin. This model helped to explore reliable planning of groundwater use and projections for the groundwater basin. As a result of modeling runs, the SCVWD predicted that groundwater demands for the Llagas Subbasin will increase by approximately 7,000 afy, and more than 4,000 afy of supplemental water will be necessary to maintain design groundwater management objectives.

August 2016

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City of Morgan Hill 2015 Urban Water Management Plan