Plant community development and peat stratigraphy in forested fens in response to ground-water flow systems

Wetlands ◽  
1998 ◽  
Vol 18 (3) ◽  
pp. 409-430 ◽  
Author(s):  
Gregory S. Podniesinski ◽  
Donald J. Leopold
Keyword(s):  
Community Development ◽  
Ground Water ◽  
Water Flow ◽  
Plant Community ◽  
Ground Water Flow ◽  
Flow Systems ◽  
Plant Community Development ◽  
Peat Stratigraphy

Ground Water Contamination of the Coal Gangue Leachate of Sandy Base Field in Erdos - On the Case of the Coal Waste Field of Daliu Tower Mine Area

2013 ◽  
Vol 405-408 ◽  
pp. 2172-2176
Author(s):  
Jia Yin Lu ◽  
Shao Gang Dong ◽  
Wei Zhang ◽  
Ding Ding Wu
Keyword(s):  
Ground Water ◽  
Water Flow ◽  
Water Discharge ◽  
Coal Gangue ◽  
Hazardous Substances ◽  
Coal Waste ◽  
Water Runoff ◽  
Ground Water Flow ◽  
Background Value ◽  
Flow Systems

Based on the hydro-geological survey, sampling analysis and combined with ground water flow systems theory, the work studied coal gangue leachate of a typical sandy base coal waste field in Erdos on ground water environmental impact. The results showed that pile of coal waste change the original characteristics of ground water flow systems, coal waste field from ground water discharge areas change into the runoff area, the bottom of Gangue heap immersion in ground water long term, the toxic and hazardous substances released and spread to the downstream by ground water runoff. Chromium, arsenic, fluoride, sulfateradical, copper, zinc, nickel, manganese and other pollution factors in the downstream ground water of gangue field and surface outlet is much higher than background value, where concentration of arsenic and NO3–N is 1.013mg / l and 31.2 mg / l, respectively higher than the background value which is 148 and 3 times.

Oxidation–reduction sequences in ground water flow systems

1979 ◽  
Vol 16 (1) ◽  
pp. 12-23 ◽  
Author(s):  
D. R. Champ ◽  
J. Gulens ◽  
R. E. Jackson
Keyword(s):  
Ground Water ◽  
Water Flow ◽  
Platinum Electrode ◽  
Ground Water Flow ◽  
Ground Water Pollution ◽  
Exploration Geochemistry ◽  
Oxidation Reduction ◽  
Flow Systems ◽  
Iron Manganese ◽  
Redox Zones

Hydrogeologists and ground water geochemists have observed a decline in the measured (platinum electrode) potential, EH, of ground water as it migrates from upland recharge areas to lowland discharge areas under confined conditions. Such variations in EH and variations in concentrations of elements with variable oxidation states (e.g., oxygen, nitrogen, iron, manganese, sulfur, and carbon) can be accounted for by a sequence of oxidation–reduction reactions occurring in the flow systems, the sequence being based on thermodynamic principles as outlined by Stumm and the microbial catalysis of such reactions. This sequence of reactions results in the identification of three redox zones in ground water flow systems: (1) oxygen–nitrate, (2) iron–manganese, and (3) sulfide. The mobility and concentration of most transition metal and nonmetal ions vary according to zone—a matter of considerable significance in exploration geochemistry and in ground water pollution studies.

Conceptualization and Characterization of Ground-Water Flow Systems

2009 ◽  
pp. 61-61-20
Author(s):  
KE Kolm ◽  
PKM van der Heijde ◽  
JS Downey ◽  
ED Gutentag
Keyword(s):  
Ground Water ◽  
Water Flow ◽  
Ground Water Flow ◽  
Flow Systems
Sign in / Sign up

Export Citation Format

Share Document