As anyone who pays for groceries, rent, equipment, labor, utilities, etc. knows, it is much more effective to work with a budget so that the expenses can be planned for and “covered” as appropriate when the piper calls. The income side needs to be accounted for in advance of the payments side to avoid writing rubber checks and paying “overdraft charges” or, ultimately, getting services reduced or cut off.
Groundwater management is set up in much the same manner (interesting that the water world refers to extraction greater than what is supportable as “overdraft”). Each basin/Subbasin/GSA (Groundwater Sustainability Agency) area must assess the amounts and types of water coming into the area before the determination can be made as to what can support what is expected to be needed to cover the extractions. As in either equation, expenses (or extractions) in excess of income (water inflow or import) will result in the “accounts” being in the red or in “overdraft.”
In recognition of these parallels, the SGMA legislation requires the GSA to do the math on an annual basis to check the status of the “checkbook” balance as far as water is concerned. What we are all seeking, of course, is the checkbook being balanced, thereby avoiding the negative impacts of miscalculation. Unfortunately, groundwater is considerably more difficult to account for, so one of the continuous and continuing efforts which the GSA will be pursuing is the better understanding of our account balances so we can achieve real, verifiable balance at the earliest possible time.
At the last GSP (Groundwater Sustainability Plan) update, Lynn Groundwater from Provost and Pritchard walked the group through the range of somewhat limited knowledge currently available to us. One method of analysis, using groundwater contour maps, shows our negative balance to be 18,000 acre-feet. Another method, using ET (evapotranspiration) estimates and crop patterns, shows a deficit of 79,000 acre-feet. The difference, or “gap” will need to be narrowed over the next twenty years as we gather additional measurements and other data necessary to clarify the actual “overdraft.”
In the meantime, MAGSA intends to focus its efforts heavily on the possibilities for additional supply side (income) to better offset the anticipated deficits currently anticipated. We will look for additional water to offset the demands before having to cut back on the pumping (check writing). Balance is, and shall continue to be, the goal. We will do what any business person does, continue to adjust the income and expense (inflow and outflow) to ultimately achieve that balance!