Seepage-face boundaries are common features of unconfined ground water flow. These boundaries exist at the intersection of an unconfined aquifer and a surface water body such as a lake, river, or wetland. The existence of a seepage-face boundary is necessary to provide a physical transition between the internal water-table boundary and the external equipotential boundary when an unconfined aqui...

The rich biodiversity in the floodplain area is influenced by both floods and groundwater (GW). To protect ecological environment area, it essential to study interaction between GW. objective of this paper propose a coupling strategy hydrodynamic model GW provide an accurate simulation tool for quantifying case conducted middle reaches Irtysh River northwest China. Firstly, two-dimensional base...

Coastal aquifers involve varying conditions in time and space, owing to the occurrence of free and moving boundaries, such as the water table, seepage face and saltwater intrusion interface. A fast Updating Procedure (FUP) is developed for solving these interfaces in steady and transient conditions with the finite element method. Several test examples, which involve confined and phreatic ground...

Abstract Kusatsu-Shirane volcano is one of the active volcanoes in Japan. Phreatic explosions occurred Mt. Shirane 1983 and most recently, 2018, Motoshirane. Information on subsurface structure crucial for understanding activity with well-developed hydrothermal systems where phreatic eruptions occur. Here, we report aeromagnetic surveys conducted at low altitudes using an unmanned helicopter. T...

In order to evaluate the impact of groundwater drainage on flow, Hetaoyu coal field was taken as a case study in Longdong area, China, where seam covered with multilayer aquifers. A three-dimensional unsteady flow model and one-dimensional fracture water were calculated by joint equations for changing hydrogeological structures under mining. According results, mine construction had greatly affe...

Groundwater artificial recharge and medium characteristics represent the major factors in controlling groundwater flow processes managed aquifer areas. According to depositional features of alluvial fans, an analogous homogeneous phreatic sand tank corresponding inhomogeneous scale numerical models were established investigate under combined influence (human activities) decaying hydraulic condu...

A gas blowout during an unauthorized well drilling occurred on June 9, 2020 at the Rome-Ciampino boundary periphery of Colli Albani quiescent volcano. This zone hosts a shallow confined gas-pressured aquifer, which recently produced further three blowouts. Dangerous atmospheric CO2 and H2S concentrations killed some birds, 12 families were evacuated. The helium isotopic composition indicates th...