Dynamic variations in the chemical and isotopic character of the lower Missouri
River can be explained primarily in terms of the relative contribution of lower
basin waters in the river, which can be computed from gauging station data to
vary from <5 to 86%. The endmember representing the lower basin component has an
average electrical conductivity of 261 uS, a pH of 7.8, an alkalinity of 111
mg/L, sulfate (SO4) of <5 mg/L, total organic carbon (TOC) of 5.9 mg/L, and a
o18O value of -6.1, mostly similar to shallow meteoric groundwaters in Missouri.
The endmember representing the upper basin has an average electrical conductivity
of 814 uS, a pH of 8.2, an alkalinity of 191 mg/L, SO4 of 216 mg/L, TOC of 3.0
mg/L, and a o18O value of -11.6. The normalized volumetric contributions
facilitate geographic deliniation of nonpoint source pollutants such as TOC and
offer new ways to predict water quality and estimate annual loads. Includes 33 references, tables, figures.
| Edition : | Vol. 93 - No. 2 |
| File Size : | 1
file
, 580 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 11 |
| Published : | 02/01/2001 |
