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Emilio Sánchez-León

Emilio Sánchez-León
Bayerisches Landesamt für Umwelt (Hof) · Groundwater Monitoring

Doctor of Philosophy
Scientist - Modeller at the Bayerisches Landesamt für Umwelt (Hof)

About

16
Publications
6,995
Reads
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146
Citations
Citations since 2016
9 Research Items
130 Citations
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20162017201820192020202120220510152025
Additional affiliations
January 2018 - July 2021
University of Tuebingen
Position
  • PostDoc Position
Description
  • Research Unit FOR2131, Data assimilation for improved characterization of fluxes across compartmental interfaces
Education
February 2014 - February 2018
University of Tuebingen
Field of study
  • Hydrogeology

Publications

Publications (16)
Article
Full-text available
The stratification of sedimentary aquifers introduces spatial variability in hydraulic conductivity, primarily between individual horizontal layers. On larger scales, the vertical heterogeneity enhances hydraulic anisotropy, with the horizontal conductivity typically exceeding the vertical one. In this study, the hydraulic anisotropy of a stratifie...
Article
Full-text available
Pumping and tracer tests are site-investigation techniques frequently used to determine hydraulic conductivity. Tomographic test layouts, in which multiple tests with different combinations of injection and observation wells are performed, gain a better insight into spatial variability. While hydraulic tomography has repeatedly been applied in the...
Article
Full-text available
We compare two ensemble Kalman-based methods to estimate the hydraulic conductivity field of an aquifer from data of hydraulic and tracer tomographic experiments: (i) the Ensemble Kalman Filter (EnKF) and (ii) the Kalman Ensemble Generator (KEG). We generated synthetic drawdown and tracer data by simulating two pumping tests, each followed by a tra...
Poster
Full-text available
Pumping and tracer tests are frequent site-investigation techniques used to determine aquifer parameters, notably hydraulic conductivity (K). To gain insight into their spatial distribution, tomographic test layouts are required, i.e., multiple tests stressing different aquifer zones and observing the response at multiple points. Analyzing such dat...
Article
Spinning up large-scale coupled surface-subsurface numerical models can be a time and resource consuming task. If an uninformed initial condition is chosen, the spin-up can easily require 20 years of repeated simulations on high-performance computing machines. In this paper we compare the classical approach of starting from a fixed shallow depth to...
Poster
Full-text available
The demands for better representations of physical processes in numerical models and the rapid evolution of computing power have boosted the development of models that can describe the terrestrial water cycle in a coupled approach. Such coupled models simulate water and energy fluxes in the atmosphere, on the land surface, and in the subsurface in...
Presentation
Aquifer heterogeneity is a key characteristic controlling to a large extent groundwater flow and solute transport. To enhance the performance of hydrogeological models, this heterogeneity needs, very often, to be described at a high resolution. Recent numerical studies on parameter estimation and inverse modeling show the advantages of using not on...
Conference Paper
Full-text available
Pumping tests remain a method of choice to deduce fundamental aquifer properties and to assess well condition. In the oil and gas (O&G) industry, well testing has been the core technique in examining reservoir behavior over the last 50 years. The pressure derivative by Bourdet, is perhaps, the most significant single development in the history of w...
Article
Hydraulic tomography (HT) is a method for resolving the spatial distribution of hydraulic parameters to some extent, but many details important for solute transport usually remain unresolved. We present a methodology to improve solute transport predictions by combining data from HT with the breakthrough curve (BTC) of a single forced-gradient trace...
Article
Full-text available
Mexico City relies on groundwater for most of its domestic supply. Over the years, intensive pumping has led to significant drawdowns and, subsequently, to severe land subsidence. Tensile cracks have also developed or reactivated as a result. All such processes cause damage to urban infrastructure, increasing the risk of spills and favoring contami...
Article
Full-text available
Nitrate pollution is a worldwide problem in groundwater, as it may limit water supply and increase health risk when high concentrations are present. The North Maresme coastal alluvial groundwater-dependent agrosystem, one of the most heavily nitrate polluted aquifers in Spain, is located 70 km northeast from Barcelona. Field monitoring campaigns pe...
Article
Full-text available
Nitrate pollution is a worldwide problem in groundwater, as it may limit water supply and increase health risk when high concentrations are present. The North Maresme coastal alluvial groundwater-dependent agrosystem, one of the most heavily nitrate polluted aquifers in Spain, is located 70 km northeast from Barcelona. Field monitoring campaigns pe...
Article
Full-text available
Light non-aqueous phase liquids (LNAPL) represent one of the most serious problems in aquifers contaminated with petroleum hydrocarbons liquids. To design an appropriate remediation strategy it is essential to understand the behavior of the plume. The aim of this paper is threefold: (1) to characterize the fluid distribution of an LNAPL plume detec...
Article
Full-text available
Purpose This paper addresses the application of bioproducts produced by plants (locust bean, guar, and mesquite seed gums) to enhance remediation processes of different nature: soil washing and biodegradation methodologies. Materials and methods These natural gums were tested at laboratory scale to remove total petroleum hydrocarbons-diesel fracti...
Conference Paper
Full-text available
The major paradox in teaching Earth Sciences Engineering lies in the inconsistency between traditional teaching-evaluation methods, and the true methodologies applied in Engineering as a professional activity. Conventional systems are based on unidirectional information-transfer processes between the professor and the student. Moreover, the main i...

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