The Chemical Composition and Flow of the River Lea, Spain
Title:
The Chemical Composition and Flow of the River Lea, Spain
Author:
Echeandia, A. Ruiz, E. Ascacibar, M. Casey, H.
Appeared in:
Chemistry & ecology
Paging:
Volume 12 (1996) nr. 3 pages 171-186
Year:
1996-07-01
Contents:
Weekly measurements of chemical composition were made at four sampling sites on the Lea River (Spain) between July 1985 and August 1986. at two stations there were gauging-weirs for stream discharge monitoring. Conductivity, pH, alkalinity, silicon, calcium, magnesium, sodium, potassium, ammonia, nitrate, sulphate, chloride, reactive phosphate, and total phosphate, were recorded in each site. Results were analysed using multiple regression techniques to study the relationship between flow and chemical components. Conductivity, alkalinity, calcium, magnesium and sulphate were strongly related to flow, decreasing in concentration with increased flow. Ammonia, potassium, reactive phosphate and total phosphate varied most widely, with peaks at times of heavy rainfall. Nitrate increased at times of high discharge, with little variation between sampling points. Silicon decreased in summer and autumn in the lower catchment area whilst chloride and sodium were higher in the lower catchment of the River Lea.