Agricultural Impacts on Bacterial Water Quality in Karst Groundwater

1995 ◽  
Vol 24 (5) ◽  
pp. 959-969 ◽  
Author(s):  
G. C. Pasquarell ◽  
D. G. Boyer
2008 ◽  
Vol 193 (1-4) ◽  
pp. 309-322 ◽  
Author(s):  
J. Hoorman ◽  
T. Hone ◽  
T. Sudman ◽  
T. Dirksen ◽  
J. Iles ◽  
...  

2009 ◽  
Vol 68 (4) ◽  
pp. 1074-1082 ◽  
Author(s):  
J.M. Dabrowski ◽  
K. Murray ◽  
P.J. Ashton ◽  
J.J. Leaner

Water ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 492 ◽  
Author(s):  
Matjaž Glavan ◽  
Špela Železnikar ◽  
Gerard Velthof ◽  
Sandra Boekhold ◽  
Sindre Langaas ◽  
...  

Throughout the European Union (EU), high concentrations of nitrates and pesticides are among the major polluting components of drinking water and have potential long-term impacts on the environment and human health. Many research projects co-funded by the European Commission have been carried out, but the results often do not influence policy making and implementation to the extent that is duly justified. This paper assesses several issues and barriers that weaken the role of science in EU policy making and EU policy implementation in the case of agricultural impacts on drinking water quality. It then proposes improvements and solutions to strengthen the role of science in this process. The analysis is conceptual but supported empirically by a desk study, a workshop, and complementary individual interviews, mostly with representatives of organizations working at the EU level. The results indicate that perceived barriers are mostly observed on the national or regional level and are connected with a lack of political will, scarce instruction on the legislation implementation process, and a lack of funding opportunities for science to be included in policy making and further EU policy implementation. In response to that, we suggest translating scientific knowledge on technological, practical or environmental changes and using dissemination techniques for specific audiences and in local languages. Further, the relationship between data, information and decision making needs to change by implementing monitoring in real-time, which will allow for the quick adaptation of strategies. In addition, we suggest project clustering (science, policy, stakeholders, and citizens) to make science and research more connected to current policy challenges and stakeholder needs along with citizen involvement with an aim of establishing sustainable long-term relationships and communication flows.


2011 ◽  
Vol 29 (6) ◽  
pp. 843-856 ◽  
Author(s):  
Peng Qin

Based on geological survey data and detailed geological analysis results, the current article reveals the characteristics effects and role of evolution on karst groundwater caused by coal mining in Fengfeng in Hebei, China. Results indicate that long-term and large-scale mine excretion and excessive groundwater exploitation are major factors that changed the karst groundwater flow field and caused the water level to fall, the water quality to deteriorate and the water resources to decay.


Author(s):  
Min Xiao ◽  
Zenglei Han ◽  
Sen Xu ◽  
Zhongliang Wang

It is important to investigate temporal variations of water chemistry for the purpose of improving water quality in karst groundwater systems. Groundwater samples were collected daily under various land uses of Guiyang. Major ions and stable carbon isotope composition of dissolved inorganic carbon (δ13CDIC) were analyzed to understand the biogeochemical processes. The water chemistry was dominated by Ca2+, Mg2+, HCO3-, and SO42-, which mainly derived from the dissolution of carbonate rocks (limestone and dolomite) and oxidation of sulfide. The groundwater was defined as of the HCO3-Ca Mg and HCO3·SO4-Ca·Mg type, according to its hydrochemical characteristics. Results suggested that hydrochemical concentrations changed quickly, in response to rainfall events. The fast response revealed that karst groundwater was easily impacted by rainfall and anthropogenic inputs according to temporal variation of water chemistry. The distribution of DIC (dissolved inorganic carbon) and δ13CDIC showed that DIC is mainly sourced from soil CO2(g) influx and carbonate dissolution. δ13CDIC and major ions ratios suggested that carbonate minerals were dissolved by H2SO4 at groundwater in wooded area, contributing an important source for DIC due to the slight enrichment of heavy δ13CDIC. More negative δ13CDIC values were observed after rainfall reflected the fact that soil CO2(g) and organic carbon oxidation influxes accounted for a large share during DIC formation. Various δ13CDIC and hydrochemical patterns were observed under various land use and human activity conditions. Meanwhile, relative high nitrate loads were found in groundwater after rainfall, suggesting high anthropogenic inputs following rainwater as having side effects on water quality. This study suggests that water chemistry and isotopic proof provide a better understanding of water quality and carbon dynamics responding to rainfall events in the karst groundwater systems.


Sign in / Sign up

Export Citation Format

Share Document