A low-dimensional subsurface model for saturated and unsaturated flow processes: ability to address heterogeneity

Variability of Water Transit Time Distributions at the Strengbach Catchment (Vosges Mountains, France) Inferred Through Integrated Hydrological Modeling and Particle Tracking Algorithms

“…The model NIHM used to simulate the response of the Strengbach catchment is a physically based spatially distributed model that describes and couples the flow processes occurring in the surface and subsurface compartments of a watershed [36][37][38][39]. The model can describe flow in the subsurface, in a 1-D stream network, and also over the 2-D land surface.…”

“…A full description of the model and the numerical techniques used for the resolution is available in [38]. The coupled model was carefully verified using model inter-comparisons and bench tests [37,38], and was proven relevant when applied to actual complex hydrosystems [39].…”

“…In this study, a low-dimensional integrated hydrological model, named the Normally Integrated Hydrological Model (NIHM) [36][37][38][39], is employed to simulate the hydrological response of a mountainous headwater catchment (the Strengbach catchment, in the Vosges Mountains) belonging to the French network of critical-zone observatories. The low-dimensional approach developed in NIHM enables researchers to describe coupled surface-subsurface flow in a physically consistent manner while reducing significantly the computational cost involved.…”

Magnetic resonance sounding measurements as posterior information to condition hydrological model parameters: Application to a hard-rock headwater catchment

“…As a proof of concept, this methodology is applied to the Strengbach catchment -a mountainous catchment belonging to the French network of criticalzone observatories (Pierret et al, 2018). The model used in the study is an integrated hydrological model (i.e., a model that couples surface and subsurface flow processes) called NIHM (Normally Integrated Hydrological Model;Pan et al, 2015;Weill et al, 2017;Jeannot et al, 2018). Both streamflow and MRS data are employed to define a set of parameters allowing for describing both the hydrological response at the outlet and the local evolution of subsurface water content identified by MRS measurements.…”

Vadose Zone Modeling in a Small Forested Catchment: Impact of Water Pressure Head Sampling Frequency on 1D-Model Calibration

“…With altitudes ranging from 883 to 1146 m ( Figure 1B,C), the current climate is mountainous-oceanic with a mean annual rainfall of 1400 mm and an average temperature of approximately 6 • C [38]. The site is well suited for multidisciplinary studies in hydrological, geochemical and forest research [39][40][41][42]. The monitoring devices have been installed in a 100-year-old spruce experimental stand located in the northern upper portion of the Strengbach catchment ( Figure 1C,D, ALT: 1079 m; COORD: 48 • 12.963' N and 7 • 11.928' E).…”