Finite element method (FEM) based analysis using the SEEP/W and SLOPE/W sub-programme options of a GEOSTUDIO software was used to analyze Saura-Keffi earth dam in Nasarawa State, Nigeria with view seepage its stability. The created geometry assigned material properties boundary conditions at reservoir water levels of: minimum (3 m), normal (6 m) maximum (7 m). conducted under cases that without...

Abstract Direct sampling and analysis of fumarolic gas was conducted at Ebinokogen Ioyama volcano, Japan, between December 2015 July 2020. Notable changes in the chemical composition gases related to volcanic activity included a sharp increase SO 2 H concentrations May 2017 March 2018. The analyses 2018 immediately preceded April eruption volcano. isotopic ratios O revealed process formation. U...

Increasing background salinity in watersheds has largely been attributed to road salt retention groundwaters due their long residence times. However, laboratory studies demonstrate that soils temporarily store salts, either porewater or adsorbed onto particles. Field of are nevertheless rare, and mechanisms transport across multiple hydrological reservoirs (e.g., from soil groundwater) unknown....

Fumarolic gas survey of dormant volcanoes in hydrothermal activity is crucial to detect compositional and mass flux changes emissions that are potential precursors violent phreatic or even magmatic eruptions. Here we report on new data for the chemical compositions (CO 2 , H S, SO ) fluxes fumarolic (97–104°C) from La Soufrière volcano Guadeloupe (Lesser Antilles) obtained both mobile MultiGas ...

Sustainable groundwater utilization is important for social and economic development. There a need sustainability assessment in small-scale areas lacking detailed mining data. Here, exploiting water level data series, we propose an indicator of based on the response to (MGSI) better evaluation; it integrates spatio-temporal variability at local scale. A decomposition coefficient was applied dec...

Groundwater samples that were distributed across the Yancheng area in lower reaches of Huaihe River collected from phreatic aquifer and first confined water layer during summer 2016. Using quality index, suitability groundwater for drinking irrigation purposes was systematically evaluated. The controlling factors solute formation causes deterioration discussed using Chadha diagram relationship ...