Characteristics of soil CO2 under different conditions and its influence on water chemical composition: an experimental and modeling study in the laboratory

2020 ◽  
Vol 79 (18) ◽  
Author(s):  
Zongjun Gao ◽  
Hongying Zhang ◽  
Mengjie Shi ◽  
Shaoyan Fang ◽  
Yechen Cui ◽  
...  
CATENA ◽  
2019 ◽  
Vol 173 ◽  
pp. 414-423 ◽  
Author(s):  
M. Fernández-Martínez ◽  
O. Margalef ◽  
F. Sayol ◽  
D. Asensio ◽  
G. Bagaria ◽  
...  

Water ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1227
Author(s):  
Francesco Ulloa-Cedamanos ◽  
Jean-Luc Probst ◽  
Stephane Binet ◽  
Thierry Camboulive ◽  
Virginie Payre-Suc ◽  
...  

The long-term trends and seasonal patterns of stream water chemical composition in a small remote forested karst catchment, were investigated from 1978 to 2018. Calcium, magnesium, and bicarbonates, the dominant ions, increased over the period together with temperature, while sulfates decreased. Carbonate and sulfate mineral dissolution was the main source of these elements. These trends and the seasonal opposite patterns of discharge vs. temperature, calcite saturation index vs. pCO2 and bicarbonate vs. sulfates, suggested the influence of discharge, of reduced long-range atmospheric pollution, and of increasing air temperature on biological activity and carbonate dissolution. Furthermore, the hydrological regime controlled the seasonal stream water chemical composition and fluxes by: (i) a dilution during the high discharge period, (ii) a change in the contribution rate of the waters draining different lithological areas in the catchment, e.g., the increased sulfates to bicarbonates ratio during summer low flows, with a maximum alkalinity decrease of 24%, and (iii) a “piston” and a “flushing” effects of dissolved elements stored in soils and epikarst with the first autumn heavy rains. Long-term stream water hydrochemical surveys of karst system have proved to be powerful indicators of biogeochemical processes, water sources and pathways under variable natural and anthropogenic environmental pressure conditions.


Author(s):  

Statistical indicators of many-year observations of the Cherek-Bezengiyskiy River water chemical composition within the boundaries of Kabardin-Balkar State High-mountain Natural Reserve have been presented. The research results can be used for formation of the summarized systematic information needed for development of regional or basin water quality indicators.


2014 ◽  
Vol 4 (2) ◽  
pp. 22
Author(s):  
Alif Noor Anna

The information of rain water quality in Indonesia is rarely recorded, where as it is important for the region in which the source of fresh water is unavailable. Rain water composition is mostly ascertained by water vapour and ions which are available in the atmosphere during vapouration. In fact the rain water composition of coast region is sea water like and rain water chemical composition of urban are then become HNO3 and HSO4, while rain water of active vulcanic region eventuality has a high sulphur-wombed so that its quality sulphuric-acid. For the region in which the source of fresh water is unavailable the rain water is previously sterilized. Sterilization is consecutively done by adding salts, killing all bacteria, spores, and filltering.


2008 ◽  
Vol 87 (3-4) ◽  
pp. 224-231 ◽  
Author(s):  
Marek Błaś ◽  
Mieczysław Sobik ◽  
Ryszard Twarowski

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