Influence of atmospheric deposition on lake mass balances in the Turkey Lakes Watershed,Central Ontario |
| |
Authors: | D S Jeffries R G Semkin R Neureuther M Seymour J A Nicolson |
| |
Institution: | 1. Aquatic Ecology Division, National Water Research Institute, L7R 4A6, Burlington, Ontario, Canada 2. Great Lakes Forest Centre, P6A 5M7, Sault Ste Marie, Ontario, Canada
|
| |
Abstract: | Ion mass budgets were measured for 2 water yr (June–May, 1981–83) for a high and a ).ow elevation lake and their associated catchments. The lakes are located in the Turkey Lakes Watershed (TLW) in central Ontario, Canada, which is an undeveloped basin located on the Canadian Shield, 50 km north of Sault Ste. Marie. The ionic budgets of the lakes show that atmospheric deposition directly to the lakes' surfaces is the principal input pathway for H+ and NH4, whereas basic cations, SO4, NO3, and probably alkalinity are supplied primarily by inflow from the surrounding terrestrial basin and/or upstream lake. The lakes strongly retain H+ (i.e. output ? input), weakly retain the N species, and are in balance (i.e. output = input) for other ions except Ca and alkalinity which show an excess output compared to measured + estimated inputs. We hypothesize that an input of groundwater and/or seepage accounts for most of the Ca and alkalinity imbalance although the existence of within-lake alkalinity generation is probable also. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|