Dissolved Ca, Mg, Na, K, Fe, Mn, and Zn loads of the Buffalo River generally show trends along the river attributable to changes in geology and vary with the season because of concentration by evapotranspiration and dilution by rain. Suspended material element loads show neither seasonal trends nor trends along the river. The Fe load for the river is predominantly in the suspended material, the Mn load is divided approximately evenly between dissolved and suspended material, and Ca, Mg, Na, K, and Zn are predominantly in the dissolved load.
Steele, Kenneth F. and Wagner, George H.
"1974 Nonflood-Stage Chemical Loads of the Buffalo River, Arkansas,"
Journal of the Arkansas Academy of Science: Vol. 30
, Article 34.
Available at: http://scholarworks.uark.edu/jaas/vol30/iss1/34