HGS RESEARCH HIGHLIGHT – Sequential surface and subsurface flow modeling in a tropical aquifer under different rainfall scenarios
This paper demonstrates how HGS is flexible enough to model specific regions/domains of interest (i.e. including discrete fracture networks, but without integrated surface hydrology) and can be used in conjunction with other hydrologic modelling platforms.
HGS RESEARCH HIGHLIGHT – Combining experimental and modelling approaches to monitor the transport of an artificial tracer through the hyporheic zone
HGS users at a consortium of French research laboratories makes excellent use of the integrated nature of HydroGeoSphere simulations to investigate hyporheic exchange and mixing processes, relying on both experimental (i.e. tracer tests) and modelling techniques. The authors concluded that the mixed experimental/modelling approach used in this study allowed them to “resolve some of the uncertainties inherent in our understanding of transient storage and hyporheic exchange.”
HGS RESEARCH HIGHLIGHT – Upscaling Hydrological Processes for Land Surface Models with a Two-Hydrologic-Variable Model: Application to the Little Washita Watershed
The authors have used a 3D HydroGeoSphere model of a heavily studied sub-catchment (the Little Washita Watershed, Oklahoma) as a reference point to test the validity of much simpler modelling approaches. Results of the 3D HydroGeoSphere model are compared against a simpler 2D hillslope model, also constructed using HydroGeoSphere.
HGS RESEARCH HIGHLIGHT – Impacts of Coastal Shrimp Ponds on Saltwater Intrusion and Submarine Groundwater Discharge
This study investigates the potential impact that aquaculture can have on solute transport and saltwater intrusion in coastal settings. It is certainly an interesting read, and an interesting conceptual problem. Typically when we think of vertical saltwater intrusion it’s due to coastal inundation associated with temporary natural causes like storm surges. However, with shrimp pond aquaculture saline ponds are actually perched on top of agricultural soils, above a freshwater aquifer. In this study the authors have investigated several scenarios (varying pond water salinity, ponded water depth and farm/pond width) to see how it impacts a previously unrecognized/unstudied process contributing to groundwater salinization.
HGS RESEARCH HIGHLIGHT – Subglacial Meltwater Recharge in the Dongkemadi River Basin, Yangtze River Source Region
The paper highlighted here is about the construction of a HydroGeoSphere model to simulate groundwater recharge due to the melting of water underneath a glacier under the influence of climate change, and represents the first attempts to account for the Dongkemadi Glacier in an integrated numerical model. The study site is a 40 km2, extensively glaciated catchment in the southwest portion of the Yangtze River Basin, on the Tibetan Plateau.
HGS RESEARCH HIGHLIGHT – Analysis of drought conditions and their impacts in a headwater stream in the Central European lower mountain ranges
A new study by researchers at the University Bayreuth investigates the impact that climate change may have on drought conditions in forested catchment with riparian wetland, specifically the Lehstenbach catchment in the Fichtel Mountains of South-Eastern Germany.
HGS RESEARCH HIGHLIGHT – Dynamic Steady State in Coastal Aquifers Is Driven by Multi‐Scale Cyclical Processes, Controlled by Aquifer Storativity.
A new paper explores the effects that periodic/cyclical processes over different time scales exert on salinity distribution throughout coastal aquifers. In other words, how is aquifer salinity impacted by sea-level changes caused by tidal effects (sub-daily), storm-surges (decadal) and glaciation (millennial scale).