SOLUTION: Water allocations and water flows in drought years. Here I provide for you the total inflow and outflows of surface water to and from SC. Assume the SC water system is and has been
Question 1048177: Water allocations and water flows in drought years. Here I provide for you the total inflow and outflows of surface water to and from SC. Assume the SC water system is and has been at steady state (ΔS = 0). The total flows in SC are presented as follows (all quantities in millions of acrefeet (MAF) per year). One acre foot is the volume corresponding to an area 660 ft x 66 ft x 1 ft where 660 ft x 66 ft is one acre, 1 AF = 325,851 gallons):
Table 1. Where South Carolina’s surface water comes from Precipitation 103.0 MAF/yr Net imports from out of state 1.7 MAF/yr Groundwater Pumping 2.0 MAF/yr Total: 106.7 MAF/yr
Where South Carolina’s surface water goes
evaporation and transpiration 61.0 MAF/yr
agriculture 3.0 MAF/yr Flows for wild & scenic rivers, and for estuary salinity standards 11.5 MAF/yr Other river flow to the ocean 27.2 MAF/yr Urban/industrial use 4 MAF/yr Total: 106.7 MAF/yr
4) If precipitation, statewide, decreases by 20%, evaporation and transpiration stay constant, and net imports from out of state and groundwater pumping stay constant, and agricultural and urban uses remain unchanged, what amount of water is left for rivers and flows to the ocean? 2pt
MAF
