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Controls of concentration and loadings of major ions in a stream draining intermediate igneous rocks
Author(s) -
Grieve Ian C.
Publication year - 1986
Publication title -
earth surface processes and landforms
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.294
H-Index - 127
eISSN - 1096-9837
pISSN - 0197-9337
DOI - 10.1002/esp.3290110306
Subject(s) - igneous rock , moorland , streams , hydrology (agriculture) , ion , range (aeronautics) , geology , mineralogy , environmental science , geomorphology , chemistry , geochemistry , ecology , materials science , biology , computer network , geotechnical engineering , organic chemistry , computer science , composite material
Some 300 measurements under a wide range of flow conditions were used to construct regression models to predict concentrations of six major ions in a moorland stream draining intermediate‐basic lavas in Scotland. Ca, Mg, and HCO 3 were very closely related to discharge in log‐log regressions ( r 2 > 90 percent). Na and Cl required inclusion of seasonal functions for best prediction ( r 2 = 76 per cent in both cases). K concentrations were predicted from discharge, direction of stage change, and a seasonal function. Annual losses of Ca, Mg, and HCO 3 were 252, 36, and 871 kg ha −1 , substantially larger than those for upland catchments on acid rocks. Losses of K, Na, and Cl were of a similar order to other upland sites.