The present paper describes the impacts of hydrology, biogeochemistry and bathymetry on phosphoru... more The present paper describes the impacts of hydrology, biogeochemistry and bathymetry on phosphorus dynamics in freshwater ecosystem. Various methods for quantifying phosphorus retention have been discussed, including the phosphorus spiraling concept and the advection-dispersion-reaction equation as well as its associated forms. The various parameters typically measured during field or experimental studies that are used in these models. Finally, we compare the similarities and differences in methodologies used to model phosphorus retention in freshwater ecosystems and the need to frame phosphorus processing freshwater ecosystems.
The systematic and comprehensive geochemical analysis of fluoride (F) in twenty agricultural soil... more The systematic and comprehensive geochemical analysis of fluoride (F) in twenty agricultural soil samples was carried out to understand spatial variability, mechanism of retention and release, and the areas of potential risk due to high concentrations of F in soil around Sidhi District, Central India. The spatial variations in physico-chemical parameters revealed significant difference in the methods of cultivation due to geomorphological constraints, availability of surface water and ground water etc., in the study area. The north and small pocket in central Sidhi were rich in fertile soils due to availability of surface and ground water. The southern and eastern Sidhi were rainfed areas, hence, the monocropping system by traditional methods showed less impact on the soil physico-chemical parameters. The soil F varied from 366.94 to 1178 mg/kg and 2-4 times greater than the background soil value (320 mg/kg) of the world. The pollution indexes were > 1 indicating prevalence of elevated soil fluorine.
The Sidhi District is situated on the Northeastern boundary of the Madhya Pradesh State, India wh... more The Sidhi District is situated on the Northeastern boundary of the Madhya Pradesh State, India which lies over a transitional area between the Indo-Gangetic plain in the north and the Deccan plateau in the south and the remotest district of Madhya Pradesh The systemic and comprehensive analysis of twenty composite samples of rainfed and irrigated agricultural soil around Sidhi district. The pH of soil samples varied from 6.6 to 8 especially and recorded higher values in the irrigated soils. The EC and CEC showed large spatial variation in the irrigated soils. The results showed alterations in the biogeochemical relationships between physico-chemical parameters. In rain fed areas, the high Si/Al and low Fe/Al ratios showed silicate nature of agricultural soils along with low iron loss from primary silicates.
Jharia coal mining areas is one of the most important coal mining areas in India. It is roughly e... more Jharia coal mining areas is one of the most important coal mining areas in India. It is roughly elliptical or sickles – shaped, located in Dhanbad district of Jharkhand. For the assessment of groundwater quality, Twenty Nine groundwater samples were collected from Jharia coalfield. The pH of the analysed water samples is slightly acidic to slightly alkaline in nature in both the season. The quality assessment of groundwater shows that in general, the water is suitable for domestic purposes with some exceptions. In majority of the samples, the analyzed parameters are well within the desirable limits and water is potable for drinking purposes. However, concentrations of EC, TDS, TH, SO42-, Na+, Ca2+ and Mg2+exceed the desirable limit at few sites. The water level fluctuation shows in the study area for year 2013 is 1.29 to 6.9 mbgl. West and some part of the northern area are facing extreme scarcity due to lower availability of groundwater resource. However, eastern region of the stud...
Your article is published under the Creative Commons Attribution license which allows users to re... more Your article is published under the Creative Commons Attribution license which allows users to read, copy, distribute and make derivative works, as long as the author of the original work is cited. You may selfarchive this article on your own website, an institutional repository or funder's repository and make it publicly available immediately.
Your article is published under the Creative Commons Attribution license which allows users to re... more Your article is published under the Creative Commons Attribution license which allows users to read, copy, distribute and make derivative works, as long as the author of the original work is cited. You may selfarchive this article on your own website, an institutional repository or funder's repository and make it publicly available immediately.
Investigations of groundwater resources in order to understand aquifer system behavior are vital ... more Investigations of groundwater resources in order to understand aquifer system behavior are vital to the inhabitants of the Klela Basin, Mali, because groundwater is the only permanent water resource and is used for drinking water and irrigation. Due to climate change, this vital resource is being threatened. Therefore, MODFLOW was applied in this study to simulate groundwater dynamics. The aim of this study was to evaluate the impact of climate change on groundwater resources in the Klela basin using the RCP4.5 (Representative Concentration Scenario 4.5 W/m 2) climate scenario. Climatological, geological, hydrogeological, hydraulic and demographic data were collected and used as model input data. Groundwater recharge was estimated to be approximately 165.3 mm/year using the EARTH (Extended model for Aquifer Recharge and soil moisture Transport through the unsaturated Hardrock) model. Recharge was then used as groundwater model input. The sandstone aquifer in the study area was simulated in steady and transient conditions. The results showed that hydraulic conductivity values varied from 1.1 to 13.9 m/day. The model was used for scenario quantification after model calibration and verification using three different piezometer data sets. The results of the simulated MODFLOW model showed a decrease in groundwater levels over time.
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Papers by Bijendra kumar