Ammonia-nitrogen concentrations were determined by the phenate method. Nitrate-nitrogen was determined by cadmium reduction. Phosphate-phosphorous was determined by the ascorbic acid method. Dissolved oxygen was determined with a Solomat dissolved oxygen meter. Temperature was measured with a Omega 871 digital thermometer.
All distances are relative to the established river markings.
American Public Health Association. Standard methods for the examination of water and wastewater.