Separation of streamflow components into quickflow and baseflow is usually carried out in two main ways: hydrograph recession analysis and tracer-based methods. In this paper, it is proposed to use a fully coupled surface and subsurface flow and transport model to gain a better understanding of the relationship between physical catchment characteristics (e.g. aquifer hydraulic conductivity) and...

This article examines the required spatial discretization perpendicular to the fracture-matrix interface (FMI) for numerical simulation of solute transport in discretely fractured porous media. The discrete-fracture, finite-element model HydroGeoSphere (Therrien et al. 2005) and a discrete-fracture implementation of MT3DMS (Zheng 1990) were used to model solute transport in a single fracture, a...

Land Surface Models (LSMs) are key components of Earth System Models, which the Intergovernmental Panel on Climate Change relies in many their studies. However, these models either neglect or oversimplify basin-scale hydrological processes that produce land surface water balance. Bringing dominant physical from local scale up to LSMs presents a significant challenge for improving models. This a...

Pyrogenic dissolved organic matter (pyDOM) is known to be an important biogeochemical constituent of aquatic ecosystems and the carbon cycle. While recent studies have examined how pyDOM production, composition, photolability varies with parent pyrogenic solid material type, we lack understanding potential microbial mineralization transformation in biogeosphere. Thus, leachates oak, charred at ...

The countless kettle holes in the Late Pleistocene landscapes of Northern Europe are hotspots for biodiversity and biogeochemical processes. As a rule, they hydraulically connected to shallow groundwater system. rapid, intensive turnover carbon, nutrients pollutants therefore has major impact on quality downstream. result high-evapotranspiration rates from their riparian vegetation or strong st...

In order to advance methodologies used in the investigation of Hyporheic Zone (HZ) mixing processes, this article combines experimental and modelling tools follow a tracer injected into river infiltrating HZ. A highly concentrated sodium chloride solution was river; (i) conductivity, (ii) riverbed resistivity by Electrical Resistivity Tomography (ERT) (iii) vertically distributed concentrations...

Abstract. Excess export of nitrate to streams affects ecosystem structure and functions has been an environmental issue attracting worldwide attention. The dynamics catchment-scale solute from diffuse nitrogen sources can be explained by the changes dominant flow paths, as attenuation (including degradation nitrate) is linked age composition outflow. Previous data-driven studies suggested that ...

0022-1694/$ see front matter 2012 Elsevier B.V. A http://dx.doi.org/10.1016/j.jhydrol.2012.09.048 ⇑ Corresponding author. Tel.: +86 2768775432; fax E-mail address: [email protected] (J. Yang). It is a long-lasting challenge in subsurface hydrologic modeling to develop numerically efficient algorithm for coupling unsaturated and saturated flow, especially in regional-scale modeling. In this stud...