This is how not to do it story. There are two shots, one is 1/4 and another 2 seconds. Here are exported and resized jpegs:
1/4 no processing
ignore people at top of frame. Rain, cold and they must come and examine water at close distance.
2 seconds processed with dehazing, equalizer and local contrast
the same 2 seconds without processing
My processing effort ruined long exposure and milky water, about 4 stops. Maybe 5 or more stops. 1903 is 100 ISO and 1922 is Lo 1 (50 ISO), both are taken through variable ND filter some mid value, do not remember exactly. Well, 100 ISO requires less time than 50 ISO, so 3 to 4 stops is correct.
Sidecar for processed 2 second shot FED_1922_01.NEF.xmp (2.5 KB)
Released under CC BY-SA 4.0, enjoy