Programm (PDF)Kolloquiums-Mailingliste für Interessierte / Hinweise für Vortragende / Hinweise für Einladende (PDF, intern)

Vortragsreihe Ökologie und Umweltforschung WS 2022/23

Donnerstag 12:15-13:45 H6, Geo


Prof. Dr. Wolfgang Durner
Leiter der Abteilung Bodenkunde und Bodenphysik, TU Braunschweig (Homepage)
Donnerstag, 12.01.2023 :

Challenges in Soil Hydrological Modeling - The Devil is in the Details

"Soil hydrological modeling" is the numerical simulation of the transport of water and associated heat, solutes, and gases in the near-surface (“vadose”) zone of the subsurface. Of particular interest, in addition to the state of the soil, are fluxes to groundwater and across the soil-plant-atmosphere continuum to the free atmosphere. The scale of interest ranges from centimeters to a few meters vertically, and extends horizontally from a few meters for point processes up to watersheds for regional studies.

Soil hydrology modeling is important for a variety of applications, notably in the context of increasing water scarcity and climate change around the world. Traditionally, simulations are done by the disciplines of soil physics or hydrology ("vadose zone hydrology”), which differ in their approach to scale. While soil physics applies bottom-up approaches based on pore-scale concepts to represent the behavior of water in porous media in a process-based manner and to infer the effective behavior at the scale of interest through integration, physical hydrology goes the other way, and tries to use statistics-based observations at the scale of interest to arrive at effective modeling formulations. Unfortunately, the closure of the scale gap from typical soil physics scales to the larger scales of interest has not been achieved to date. Provocatively put, hydrology begins at a larger scale than that of soil physics ends. Nevertheless, the effects of small-scale processes on large-scale behavior can be substantial, so that ignorance of certain small-scale processes will cause macroscopic errors. This can significantly impede scientific progress and distort fundamental considerations.

This will be illustrated by two examples dealing with "hydraulic functions of drying soils". One case study affects evaporation estimates. Here, we will show how the numerical simulation of evaporation is affected by the microscale process of "film flow", which is completely ignored in traditional hydrological models. The second example deals with high-voltage lines embedded in the ground that transport renewable energy from northern to southern Germany. The heating leads to drying of the surrounding soil in the vicinity of power cables. The simulated cable temperature depends on how the hydraulic properties are parameterized. In both cases, we find that the parameterization of hydraulic properties (admittedly a very special topic of soil hydrology) has a significant impact on large-scale processes.

*** invited by Efstathios Diamantopoulos, Soil Physics



Weitere Informationen:Export as iCal: Export iCal
zurück zur Liste
DatumVortragende*rTitel


27.10.2022
Dr. Luisa Hopp
Lehrstuhl für Hydrologie, Universität Bayreuth
Streamflow generation processes: controls, flow pathways and links to solute export [Abstract]


10.11.2022
Dr. Hannah Schneider
Centre for Crop Systems Analysis, Wageningen University
Root Phenotypes for Crop Improvement [Abstract]


17.11.2022
Dr. Ingo Heidbüchel
Helmholtz-Zentrum für Umweltforschung - UFZ, Department für Hydrogeologie
Water ages in the hydrologic cycle [Abstract]


24.11.2022
Dr. Andrea Kaim
Department of Computational Landscape Ecology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
Preserving ecosystem services and biodiversity on agricultural land [Abstract]
H8

01.12.2022
Dr. Alexander Frank & BayCenSI Steering Committee
BayCenSI Opening Ceremony [Abstract]


08.12.2022
Dr. Muammar Mansor
Center for Applied Geoscience Geomicrobiology, Eberhard Karls Universität Tübingen
Microbial-mineral interactions: Formation of pyrite and implications for biosignature and environmental research [Abstract]


15.12.2022
Dr. Alexander Groos
Department Geographie und Geowissenschaften, Institut für Geographie, Friedrich-Alexander-Universität Erlangen-Nürnberg
Living on the ice edge: insights into the environmental, climatic, and human history of the Ethiopian highlands [Abstract]


12.01.2023
Prof. Dr. Wolfgang Durner
Leiter der Abteilung Bodenkunde und Bodenphysik, TU Braunschweig
Challenges in Soil Hydrological Modeling - The Devil is in the Details [Abstract]


19.01.2023
Prof. Dr. Hannes Knapp
Board Member of the Presiding Committee, Euronatur Foundation
Die aktuelle Situation der deutschen Wälder [Abstract]


26.01.2023
NN
BayCEER Mitgliederversammlung


09.02.2023
Dr. Alejandro Ordonez
Department of Biology, Aarhus University, Denmark
Rising Novelty in Ecosystems and Climates [Abstract]


16.02.2023
Dr. Nicolai Nürk
Plant Systematics, BayCEER
What is diversification and how should we study it? [Abstract]
Terminplanung und Vortragsarchiv BayCEER Kolloquium (seit 2008) sowie Geoökologisches Kolloquium (ab 2001)
Aktuelle Termine

BayCEER-Kolloquium:
Do. 09.02.2023
Rising Novelty in Ecosystems and Climates
Do. 16.02.2023
What is diversification and how should we study it?
Ökologisch-Botanischer Garten:
So. 05.02.2023
Führung | Gin: Diese Pflanzen stecken drin
So. 05.02.2023
Eröffnung | "Faszination Natur - Malereien und Zeichnungen" - Gemeinschaftsausstellung
So. 12.02.2023
Eigentümlich fremd: Wie Neophyten unsere Vorstellungen von Natur provozieren
Wetter Versuchsflächen
Luftdruck (356m): 985.2 hPa
Lufttemperatur: 1.6 °C
Niederschlag: 0.8 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 8.8 km/h
Wind (Max.): 28.8 km/h
Windrichtung: NW

...mehr
Globalstrahlung: 3 W/m²
Lufttemperatur: -1.6 °C
Niederschlag: 0.1 mm/24h
Wind (Höhe 32m): 9.6 km/h

...mehr
Diese Webseite verwendet Cookies. weitere Informationen