Arsenic concentration

In calculating groundwater (GW ) load , use the average arsenic concentration measured for the affected stretch of stream for the GW concentration (average of C1 -C5 ). The total groundwater baseflow discharge into the stream can be determined as the difference between Qout and Qin. Remember that the mine is only on one side of the stream , assume both sides of the stream contribute equally to baseflow discharge (see Figure 6). Q14) What is the groundwater load (Law) flowing into the hyporheic zone on its way to the stream ?