scholarly journals Base cation concentrations in subsurface flow from a forested hillslope: The role of flushing frequency

1998 ◽  
Vol 34 (12) ◽  
pp. 3535-3544 ◽  
Author(s):  
Douglas A. Burns ◽  
Richard P. Hooper ◽  
Jeffrey J. McDonnell ◽  
James E. Freer ◽  
Carol Kendall ◽  
...  
Keyword(s):  
Subsurface Flow ◽  
Base Cation

scholarly journals THE ROLE OF SUBSURFACE FLOW DYNAMIC ON SPATIAL AND TEMPORAL VARIATION OF WATER CHEMISTRY IN A HEADWATER CATCHMENT

2016 ◽  
Vol 8 (1) ◽  
pp. 17
Author(s):  
Tadashi Tanaka
Keyword(s):  
Water Chemistry ◽  
Temporal Variation ◽  
Random Process ◽  
Riparian Zone ◽  
Subsurface Flow ◽  
Solute Concentration ◽  
Spatial And Temporal Variation ◽  
Flow Dynamic ◽  
Headwater Catchment

Variation of water chemistry does not merely occur due to in situ chemical process, but also transport process. The study was carried out to address the role of subsurface flow dynamic on spatial and temporal variation of water chemistry in a headwater catchment. Hydrometric and hydrochemistry measurements were done in transect with nested piezometers, tensiometers, and suction samplers at different depths across hillslope and riparian zone in a 5.2 ha first-order drainage of the Kawakami experimental basin, Nagano, Central Japan from August 2000 to August 2001. Spatial variation of solute concentration was defined by the standard deviation and coefficient of variation of the seasonal observed concentrations. Autocorrelation analysis was performed to define temporal variation of solute concentration. The results showed that spatial variation of water chemistry was mainly influenced by the variation of subsurface flow through the hillslope and riparian zone. Solute concentration in the deep riparian groundwater was almost three times higher than that in the hillslope segment. A prominent downward flow in deep riparian groundwater zone provided transport of solutes to the deeper layer. Time series analysis showed that in the deep riparian groundwater, Ca2+, Mg2+, SO42- and HCO3- concentrations underwent a random process, Na+ concentration of a random process superimposed by a trend process, and SiO2 of a random process superimposed by a periodic process. Near the riparian surface, SO42- concentration was composed of a random process superimposed by a periodic process, whereas other solutes were mainly in a random process. In the hillslope soil water, there was no trend observed for the Na+ concentration, but there were for Ca2+ and Mg2+. The magnitude and direction of subsurface flow across hillslope and riparian zone created transport and deposition processes that changed solute concentration spatially and temporally.

scholarly journals Controls Over Base Cation Concentrations in Stream and River Waters: A Long-Term Analysis on the Role of Deposition and Climate

Ecosystems ◽  
2013 ◽  
Vol 16 (5) ◽  
pp. 707-721 ◽  
Author(s):  
Richard W. Lucas ◽  
Ryan A. Sponseller ◽  
Hjalmar Laudon
Keyword(s):  
Base Cation ◽  
River Waters ◽  
Term Analysis

The role of macropores and multi-resolution soil survey datasets for distributed surface–subsurface flow modeling

2014 ◽  
Vol 516 ◽  
pp. 97-106 ◽  
Author(s):  
Xuan Yu ◽  
Christopher Duffy ◽  
Doug C. Baldwin ◽  
Henry Lin
Keyword(s):  
Subsurface Flow ◽  
Soil Survey ◽  
Flow Modeling

Base cation enhancing role of corn straw biochar in an acidic soil

2021 ◽  
Author(s):  
Jinhua Yuan ◽  
Shengzhe E ◽  
Zongxian Che
Keyword(s):  
Base Cation ◽  
Acidic Soil ◽  
Corn Straw
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