Preliminary Overdraft Number for NFKGSA Released

The seven Kings Subbasin GSAs have reached agreement on an initial overdraft amount for the Kings Subbasin of 122,000 acre feet. The North Fork Kings GSA estimated amount of the 122,000 acre feet is 50,300 acre feet. The North Fork Kings GSA  Board has already identified potential projects to begin correcting the target overdraft amount by the SGMA sustainability deadline of 2040.

There are two basic ways to achieve sustainability and eliminate overdraft: increase water supply or reduce water demand. The Board’s first priority is to increase water supply, but there are hurdles for this course of action within the North Fork Kings area including availability and frequency of additional water; all Kings River water is allocated through a water rights schedule; and the service area has physical constraints for recharge including soil types and a limited distribution system.

The map below (click map to enlarge) shows the general soil types in the North Fork Kings GSA. The green areas in the eastern portion of the GSA are sandier soils and more conducive for recharging the aquifer. The western portion has heavier clay soils that are more impermeable and consequently poor for recharge.

Although the eastern part of the service area has better soils for recharge, it lacks a distribution system. Therefore, infrastructure needs to be constructed to deliver water to any future recharge projects that may be built. The map below (click map to enlarge) represents significant surface water features in the North Fork Kings GSA.

North Fork Kings GSA preliminary project list contains nine groundwater recharge projects yielding an estimated annual average of approximately 20,000 acre feet per year. Additional projects will need to be identified to alleviate the overdraft amount. If water supply tactics are not sufficiently successful to eliminate the 50, 300 acre feet overdraft number then management actions to reduce water demand will need to be implemented.

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