Hydrochemistry of shallow groundwater and surface water in the Ndop plain, North West Cameroon

The present research work deals with the quantification of toxic heavy metals in the water samples collected from Lake of Resko (North-West Poland). While the annual average concentration of Cadmium was calculated as 0.34 ppm in 2008 of the year and 0.28 ppm in 2009 of the year. The values obtained were found to be below the permissible limit of 2.0 ppm set for inland surface water. While the annual average concentration of Chromium was calculated as 1,75 ppm in 2008 of the year and 1.97 ppm in 2009 of the year. Which was very much above the permissible limit of 0.1 ppm set for inland surface water. The observed annual average concentration of Copper in the water was 0.05 ppm in 2008 of the year and 0.06 ppm in 2009 of the year, which was below the permissible limit of 3.0 ppm set for inland surface water. While the annual average concentration of Mercury was calculated as 0.03 ppm in 2008 of the year and 0.04 ppm in 2009 of the year, which was very much above the maximum limit of 0.01 ppm set for inland surface water. The annual average concentration of Nickel in the water samples was observed to be 2.07 ppm in 2008 of the year and 2.09 ppm in 2009 of the year, which is close to the limit of 3.0 ppm set for inland surface water. The annual average concentration of Pb in the water samples was observed to be 0.07 ppm in 2008 of the year and 0.05 ppm in 2009 of the year, which is above the permissible limit of 0.1 ppm set for inland surface water. The results of the present investigation indicate that the annual average concentration of Zn in water samples was 3.02 ppm in 2008 of the year and 2.74 ppm in 2009 of the year, which is above the permissible limit of 5.0 ppm set for inland surface water.

Download Full-text

Spatial and Temporal Variations of Nitrogen and Phosphorus in Surface Water and Groundwater of Mudong River Watershed in Huixian Karst Wetland, Southwest China

Sustainability ◽

10.3390/su131910740 ◽

2021 ◽

Vol 13 (19) ◽

pp. 10740

Author(s):

Linyan Pan ◽

Junfeng Dai ◽

Zhiqiang Wu ◽

Liangliang Huang ◽

Zupeng Wan ◽

...

Keyword(s):

Surface Water ◽

Temporal Dynamics ◽

Flow Direction ◽

Influencing Factor ◽

Shallow Groundwater ◽

Temporal Variations ◽

Field Investigation ◽

Spatial And Temporal Variation ◽

Nitrogen And Phosphorus ◽

River Watershed

When considering the factors affecting the spatial and temporal variation of nitrogen and phosphorus in karst watersheds, the unique karst hydrogeology as an internal influencing factor cannot be ignored, as well as natural factors such as meteorological hydrology and external factors such as human activities. A watershed-scale field investigation was completed to statistically analyze spatial and temporal dynamics of nitrogen and phosphorus through the regular monitoring and collection of surface water and shallow groundwater in the agricultural-dominated Mudong River watershed in the Huixian Karst Wetland over one year (May 2020 to April 2021). Our research found that non-point source pollution of nitrogen (84.5% of 239 samples TN > 1.0 mg/L) was more serious than phosphorus (7.5% of 239 samples TP > 0.2 mg/L) in the study area, and shallow groundwater nitrogen pollution (98.3% of 118 samples TN > 1.0 mg/L) was more serious than surface water (68.6% of 121 samples TN > 1.0 mg/L). In the three regions with different hydrodynamic features, the TN concentration was higher and dominated by NO3−-N in the river in the northern recharge area, while the concentrations of TN and TP were the highest in shallow groundwater wells in the central wetland core area and increased along the surface water flow direction in the western discharge area. This research will help improve the knowledge about the influence of karst hydrodynamic features on the spatial patterns of nitrogen and phosphorus in water, paying attention to the quality protection and security of water in karst areas with a fragile water ecological environment.

Download Full-text

Field scale interaction and nutrient exchange between surface water and shallow groundwater in the Baiyang Lake region, North China Plain

Journal of Environmental Sciences ◽

10.1016/j.jes.2015.11.021 ◽

2016 ◽

Vol 45 ◽

pp. 60-75 ◽

Cited By ~ 11

Author(s):

Bentje Brauns ◽

Poul L. Bjerg ◽

Xianfang Song ◽

Rasmus Jakobsen

Keyword(s):

Surface Water ◽

North China Plain ◽

North China ◽

Shallow Groundwater ◽

Field Scale ◽

Scale Interaction ◽

Nutrient Exchange ◽

Lake Region

Download Full-text

Draft Genome Sequences of Potentially Pathogenic Clostridium perfringens Strains from Environmental Surface Water in the North West Province of South Africa

Microbiology Resource Announcements ◽

10.1128/mra.00407-19 ◽

2019 ◽

Vol 8 (32) ◽

Cited By ~ 2

Author(s):

Johannes Cornelius Jacobus Fourie ◽

Tomasz J. Sanko ◽

Cornelius Carlos Bezuidenhout ◽

Charlotte Mienie ◽

Rasheed Adegbola Adeleke

Keyword(s):

South Africa ◽

Surface Water ◽

Clostridium Perfringens ◽

Draft Genome ◽

Anthropogenic Factors ◽

Genome Sequences ◽

Content Type ◽

North West ◽

The North ◽

North West Province

Surface water systems in South Africa are experiencing a major decline in quality due to various anthropogenic factors. This poses a possible health risk for humans. Here, we present the draft genome sequences of three Clostridium perfringens isolates obtained from a fecally polluted river system in the North West province of South Africa.

Download Full-text