Fig. 8From: How long do natural waters “remember” release incidents of Marcellus Shale waters: a first order approximation using reactive transport modelingProfiles of Br, Ca, Ca on solid surface, Na, Na on solid surface during release (left column) and after release (right column) in the sandstone aquifer, sand and gravel aquifer, and river, respectively. The release rate is 1.11 × 10−7 m3/s for 15 days. The “during release” is on day 10 after the release starts. The “after release” is on day 5 after release stopsBack to article page