online_water_balance_2:   Water balance to determine groundwater recharge coefficient  Reference Ponce, V. M. 2018. How much water could be pumped from an aquifer and still remain sustainable? In http:/ponce.sdsu.edu [Water balance program]    [Sample output] SAMPLE INPUT DATA: Units:           (SI units) Number of years of record n:     8 n values of annual precipitation Pi (mm):   920, 1016, 1251, 770, 915, 1235, 981, 1034 n values of annual runoff Ri (mm):   87, 141, 377, 71, 69, 281, 205, 187 n values of annual surface runoff Si (mm):   61, 96, 266, 50, 53, 199, 134, 107 Thank you for running online_water_balance_2.   Please call again.   [100728]