I run an irrigaiton system. I have a limited amount of water available for the year (100,000,000 gallons). We have broken it down so that we know we want to apply a certain percentage of the total water available per month: In Dec, Jan, and Feb the system will be off so no water is alloted. Mar=7.3% of the total available water, Apr=10.3%, May=13.1%, Jun=13.7%, Jul=19.4%, Aug=19%, Sep=11.1%, Oct=3.5% and Nov=2.6%
I can adjust the run times of water zones on a percentage basis, therefore adjusting the amount of water applied. I know that when I run my system at 85% for a month it equates to 19.4 million gallons of water applied. So for the month of August I can set my system to 85% of normal and I will use the alloted 19 million gallons of water.
What formula should I use to determine what to set the system % to in other months to not exceed my alloted water levels?
Does taking the % for a particular month and dividing it by 19% then multiplying it by 85% work?
have I given enough information to solve this?