Increasing data-driven groundwater management is needed under SGMA; DWR technical services can support that effort
At the October 24th Board Meeting the North Fork Kings GSA Board approved to submit an application for Technical Support Services from the CA Department of Water Resources (DWR) in a move to solve data gaps in the monitoring network. Services available through DWR include the installation of dedicated monitoring wells and video logging to gather construction information on existing wells among others.
Sustainability mandates under SGMA necessitate data-driven groundwater management. A Groundwater Sustainability Plan requirement, the monitoring network is a key data gathering component for establishing and monitoring sustainability goals in the North Fork Kings GSA. Data collected from the network of monitoring wells must be reported annually to DWR; the data will also be an important metric for the North Fork Kings GSA to measure the impacts and results of future projects and management actions on groundwater levels within the service area.
Current groundwater condition insights are drawn from existing monitoring programs including CASGEM (California Statewide Groundwater Elevation Monitoring) and GAMA (Groundwater Ambient Monitoring and Assessment Program), but increased data capacity is needed to sufficiently monitor sustainability progress and ensure the GSA is achieving its mitigation targets.
The GSAs technical consultant, Kevin Johansen of Provost & Pritchard recommends a network density of 2-3 monitoring wells per township. Because of the hydrogeologic variability of the area, which includes multiple clay layers, a confined aquifer, and an unconfined aquifer (unconfined aquifer exists in the absence of clay layer), sufficient network density is important in the North Fork Kings GSA.
The map pictured below illustrates current gaps in the North Fork Kings GSA monitoring network. (Please note the image is a DRAFT.)
North Fork Kings GSA Well Network and Data Gaps
(click to enlarge)
Both existing and newly established dedicated monitoring wells will be used to fill gaps and achieve the recommended network density. To qualify for the monitoring network a well must be accompanied by a Well Completion Report, a document outlining the construction information such as depth and perforated intervals. Because it can be time-consuming work to obtain and match reports with the appropriate well, the GSA plans to take advantage of the Technical Support Services offered by DWR for the installation of dedicated monitoring wells pending application approval.
The well monitoring network will ultimately be the data collection tool providing insight into the trajectory toward sustainable levels of groundwater in the North Fork Kings GSA. The Technical Support Services offered by DWR can help efforts of the GSA to sufficiently monitor groundwater levels.