Seasonal Variations in the Biomass, Quantity and Quality of Agar, from the Reproductive and Vegetative Stages of Gracilaria (verrucosa type)

To develop effective groundwater pollution control strategies for the Kathmandu Valley, Nepal, seasonal variations in microbial quality and their underlying mechanisms must be understood. However, to date, there are no studies that address these topics. In this study, groundwater samples from dug wells were collected during the dry and wet seasons from 2009 to 2012, and Escherichia coli (E. coli) and total coliforms were analysed. Three wells were monitored each month for a year. Microbial concentrations in shallow groundwater were significantly higher during the wet season than during the dry season. Analyses of rainfall and E. coli concentrations in different seasons indicated that a high level of faecal material infiltration during the rainy season may have caused the seasonal variations in microbial quality. A moderate to strong relationship between E. coli concentrations and groundwater level suggested that the rise in groundwater levels during the wet season may be another reason for this variation. This long time-scale survey detected a significant decline in the microbial quality of shallow groundwater during the wet season as compared with the dry season. We propose that the infiltration of contaminants and change in groundwater level are the two probable mechanisms for the observed seasonal differences.

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Analysis of seasonal variations in the quality of water in a reservoir using GIS techniques

Desalination and Water Treatment ◽

10.1080/19443994.2012.749194 ◽

2013 ◽

Vol 51 (13-15) ◽

pp. 2609-2616 ◽

Cited By ~ 3

Author(s):

Concepción González-García ◽

Sara G. Condado ◽

Maria Jesús García-García ◽

Daniel Werenitzky

Keyword(s):

Seasonal Variations ◽

Gis Techniques ◽

Quality Of Water

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Seasonal Variations in the Hydrogeochemistry and the Domestic-Agro-Industrial Water Quality of the Granite-Gneiss Fractured Rock Aquiferous formations in Wum, North West Region, Cameroon

Environmental Science: Current Research ◽

10.24966/escr-5020/s1001 ◽

2019 ◽

Vol 7 (1) ◽

pp. 1-16

Author(s):

Akoachere RA ◽

Keyword(s):

Water Quality ◽

Seasonal Variations ◽

Fractured Rock ◽

Granite Gneiss ◽

Total Hardness ◽

Study Objective ◽

North West ◽

West Region ◽

Northwest Region

Wum the capital of Men chum Division is an important agricultural area in the Northwest Region in Cameroon vital for the food security of the country. The study objective was to determine and evaluate the seasonal variations during four hydrogeological seasons; dry (March), drywet (June), wet (September) and wetdry (December) in the groundwater chemistry, groundwater rock interactions and domestic-agro-industrial groundwater quality using hydrogeochemical tools; physicochemical parameters, ionic ratios, gibbs diagrams, piper diagrams, durov diagrams, Total Hardness HT, Water Quality Index WQI, Sodium Adsorption Ratio SAR

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