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Editorial Board
Publication date: December 2019Source: Physics and Chemistry of the Earth, Parts A/B/C, Volume 114Author(s): (Source: Physics and Chemistry of the Earth, Parts ABC)
Source: Physics and Chemistry of the Earth, Parts ABC - December 5, 2019 Category: Science Source Type: research

Spatial modelling of groundwater quality across a land use and land cover gradient in Limpopo Province, South Africa
This study indicated that LULC types and seasonal variability have influence on specific groundwater quality parameters. (Source: Physics and Chemistry of the Earth, Parts ABC)
Source: Physics and Chemistry of the Earth, Parts ABC - December 5, 2019 Category: Science Source Type: research

Using an expert-based model to develop a groundwater pollution vulnerability assessment framework for Zimbabwe
Publication date: Available online 4 December 2019Source: Physics and Chemistry of the Earth, Parts A/B/CAuthor(s): Mhosisi Masocha, Timothy Dube, Richard OwenAbstractPredicting groundwater vulnerability to pollution in countries with sparse data is difficult. Using Zimbabwe as a case study, this study presents a simple expert-based GIS model that incorporates seven natural and anthropogenic factors for modelling groundwater vulnerability at a national scale. The predicted groundwater vulnerability was tested against three water quality parameters: pH, total nitrates and total dissolved solids (TDS). The agreement between ...
Source: Physics and Chemistry of the Earth, Parts ABC - December 5, 2019 Category: Science Source Type: research

Urban waterlogging risk assessment in well-developed region of Eastern China
Publication date: Available online 4 December 2019Source: Physics and Chemistry of the Earth, Parts A/B/CAuthor(s): Shao Sun, Jianqing Zhai, Ying Li, Dapeng Huang, Guofu WangAbstractEastern China, a populous and economically developed area, is severely affected by various meteorological disasters under the background of global climate change. In recent years, urban waterlogs caused by heavy rainfall has become a major concern threatening urban safety and socioeconomic development. This paper aimed to reveal the spatial pattern of waterlogging risk in 89 prefecture-level cities of Eastern China by a comprehensive analysis o...
Source: Physics and Chemistry of the Earth, Parts ABC - December 5, 2019 Category: Science Source Type: research

Spatial distribution modelling of groundwater quality in the Limpopo Province of South Africa
This study indicated that LULC types and seasonal variability have effect on specific groundwater quality parameters and this varies over space and time. (Source: Physics and Chemistry of the Earth, Parts ABC)
Source: Physics and Chemistry of the Earth, Parts ABC - December 2, 2019 Category: Science Source Type: research

Editorial Board
Publication date: October 2019Source: Physics and Chemistry of the Earth, Parts A/B/C, Volume 113Author(s): (Source: Physics and Chemistry of the Earth, Parts ABC)
Source: Physics and Chemistry of the Earth, Parts ABC - November 27, 2019 Category: Science Source Type: research

Potential risk assessment of heavy metals in the Aharchai River in northwestern Iran
This study investigated the concentration of heavy metals (Pb, Cd, Fe, Cu, Cr, and Zn) in the Aharchai River as the most important river in northwestern Iran. This study had a descriptive cross-sectional design, and sampling was done at six hydrometric (gauging) stations along the river during the rainy (spring) and dry (summer) seasons in 2018. The concentrations of heavy metals were measured by an atomic absorption device. The results showed significant differences in the concentrations of heavy metals at various stations in the two seasons of spring and summer. As for the concentrations of Pb and Cd, all stations stood ...
Source: Physics and Chemistry of the Earth, Parts ABC - November 26, 2019 Category: Science Source Type: research

Recovery of uranium from residue generated during Mo-99 production, using organic solvent extraction
Publication date: Available online 22 November 2019Source: Physics and Chemistry of the Earth, Parts A/B/CAuthor(s): Naomi D. Mokhine, Manny Mathuthu, Elizabeth StassenAbstractDuring the production of the medical isotope Mo-99, the uranium and some fission products are precipitated as residue of mixed hydrated oxides. However, the PUREX extraction of uranium, plutonium is extracted, raising proliferation issues. The aim of this research was to characterize the most effective organic solvent for the recovery of uranium. Uranium oxide was dissolved in ammonium carbonate solution to form uranium tri-carbonate aqueous feed sol...
Source: Physics and Chemistry of the Earth, Parts ABC - November 23, 2019 Category: Science Source Type: research

Shift of the Arctic polar vortex in recent decades and its simulation by the NCEP CFSv2
Publication date: Available online 22 November 2019Source: Physics and Chemistry of the Earth, Parts A/B/CAuthor(s): Yajing Liu, Zhigang Wei, Guangyu Chen, Yujia Liu, Xian Zhu, Zhiyuan ZhengAbstractBy using ERA-I reanalysis data and the reforecast and forecast data of NCEP CFSv2, the inter-decadal shift in the stratospheric polar vortex boundary in winter and autumn in the Northern Hemisphere since the 1980s is analyzed, and the ability of CFSv2 to simulate the polar vortex boundary is evaluated. The results show that from 1980 to 2017, the Arctic polar vortex retreated northward in North America and expanded southward in ...
Source: Physics and Chemistry of the Earth, Parts ABC - November 22, 2019 Category: Science Source Type: research

Synthesis, characterization and application of polyacrylamide grafted bioflocculant
Publication date: Available online 22 November 2019Source: Physics and Chemistry of the Earth, Parts A/B/CAuthor(s): S.S. Ngema, A.K. Basson, T.S. MalieheAbstractWater pollution contributes to water scarcity by decreasing the amount of available freshwater. Grafted bioflocculants tend to have excellent wastewater remediation capabilities. The aim of this research was to synthesize, characterize and apply polyacrylamide grafted bioflocculant to wastewater treatment. Bioflocculant (TMT−1) produced by Bacillus pumilus JX860616 was grafted with acrylamide chains using a microwave initiated method. To optimize the synthesis, ...
Source: Physics and Chemistry of the Earth, Parts ABC - November 22, 2019 Category: Science Source Type: research

Assessment of potential impacts of climate change on water resources in Ngerengere catchment, Tanzania
In this study, the potential impacts of climate change on water resources in Ngerengere River catchment in Tanzania were assessed. The HBV model was used to undertake water resources assessment for the Ngerengere catchment and subsequently impacts of climate change on the same. Future climate for 2050s (2040–2069) and 2080s (2070–2099) were downscaled using a statistical weather generator (LARS-WG) from outputs of the Global Circulation Model (HadCM3) under SRES A2 scenario.The HBV model was calibrated and validated using observed streamflow data at Mgude gauge station for the baseline period (1971–2000). The Nash-Su...
Source: Physics and Chemistry of the Earth, Parts ABC - November 20, 2019 Category: Science Source Type: research

An assessment of groundwater use in irrigated agriculture using multi-spectral remote sensing
This study assessed groundwater use for irrigated agriculture in the Venda-Gazankulu area of Limpopo Province in South Africa using crop evapotranspiration and irrigated crop area derived from the normalised difference vegetation index (NDVI). Evapotranspiration data was derived from the Water Productivity through Open access of Remotely sensed Actual Evapotranspiration and Interception (WaPOR) dataset (250 m resolution), and irrigated areas were characterised using dry season NDVI data derived from Landsat 8. Field surveys were conducted for four years to assess accuracy and for post-classification correction. Daily ET ...
Source: Physics and Chemistry of the Earth, Parts ABC - November 17, 2019 Category: Science Source Type: research

Assessing seawater intrusion in arid and semi-arid Mediterranean coastal aquifers using geochemical approaches
In this study, a hydrogeochemical investigation, by interpretations of conservative dissolved ions was used to probe the main mechanisms controlling groundwater salinization and to characterize the associated hydrogeochemical processes occurring in Mediterranean coastal aquifers. Groundwaters of the different aquifers are of meteoric origin and they mostly flow toward the coast. Based on EC and ionic ratios, a hydro-chemical zonation of water types (ranging from Ca-HCO3, Na-HCO3, Ca-Mg-Cl-SO4, Ca-Cl to Na-Cl) from recharge areas toward the coast is revealed. This zonation is mainly controlled by migration and mixing of sal...
Source: Physics and Chemistry of the Earth, Parts ABC - November 15, 2019 Category: Science Source Type: research

Options for improving water productivity: A case study of bambara groundnut and groundnut
Publication date: Available online 11 November 2019Source: Physics and Chemistry of the Earth, Parts A/B/CAuthor(s): Tendai P. Chibarabada, Albert T. Modi, Tafadzwanashe MabhaudhiAbstractThe study determined the best management practices for improved yield (Y) and water productivity (WPET) of groundnut and bambara groundnut under different environments. Three sites representing different agro-ecological zones of KwaZulu Natal were used (Umbumbulu, Ukulinga and Wartburg). Thirty-year historic climate data from the different sites was categorised into normal and dry seasons based on probability of exceedance. Thereafter, eig...
Source: Physics and Chemistry of the Earth, Parts ABC - November 13, 2019 Category: Science Source Type: research

Hydrologic evaluation of bias corrected CMORPH rainfall estimates at the headwater catchment of the Zambezi River
This study shows that bias correction of CMORPH rainfall in the Kabompo Basin is critical for successful application in rainfall-runoff modelling. (Source: Physics and Chemistry of the Earth, Parts ABC)
Source: Physics and Chemistry of the Earth, Parts ABC - November 9, 2019 Category: Science Source Type: research