Our water needs a budget

Water is scarce. Sustainability of the resource we all depend on requires balanced inputs and outputs. Whether SGMA is the compulsion or not, responsibly managing water demands a budget.

In the Kings Subbasin we’re working to balance an overdrafted water “account”. The North Fork Kings GSA, along with the six other GSAs in the Kings Subbasin, is required by SGMA to bring its account into balance by 2040.

A water budget, required in the Groundwater Sustainability Plan (GSP),  provides valuable insight for those managing our water. It informs current conditions and will measure impact of the North Fork Kings GSA’s upcoming sustainability efforts.

The budget tracks water inputs and outputs to calculate the change in groundwater storage in the service area. A negative groundwater storage indicates overdraft.

Groundwater Storage = Inputs – Outputs

Sustainability can be achieved by increasing water supply (inputs) and/or decreasing water demand (outputs). The GSP will define how the North Fork Kings GSA plans to balance its estimated 50,300 AF of annual overdraft. The GSA can increase its inputs, decrease its outputs, or a combination of both through projects and management actions. For example increasing inputs through flood water capture off the Kings River in wet years can offset irrigation outputs, bringing the budget closer to balance.

Inputs are water sources, and can include additional surface water, precipitation, estimated groundwater pumping, and groundwater inflow. Outputs are water uses, and can include irrigation, municipal, residential, and industrial uses, as well as groundwater outflow. The North Fork Kings GSA is committed to prioritizing supply side solutions for sustainability.

Water Budget Diagram

click to enlarge

A water budget is a key component of the Groundwater Sustainability Plan (GSP), and will be included in the draft document scheduled for public review beginning in July.

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