Log in

Log in

project

A1 A2 A3

A4

 

B1 B3 B4

B5 B6 B7

B8 B9

 

C1 C3 C4

C6 C7

 

D2 D3 D5

D6 D7 D8

 

T1

 

Z1 Z2 Z3

Z4 MGK

Project B4


Effect of vertical and lateral variations of soil moisture at the field-scale on root water uptake and plant transpiration

inner membersinner publicationspixel blankinner project data

Research Area:
Soil Physics, Hydrology, Plant Sciences


project b4

Root water uptake plays an important role in the soil water balance and for land surface-atmosphere interactions. In this project, we simulate root water uptake from soil with a three-dimensional and dynamic model, R-SWMS, which couples water flow in the soil with root water uptake and flow inside the root system. This model has been extended to include the effect of hormonal signaling on transpiration and root water uptake, as well as the effect of soil environmental conditions on root development. In addition to the model development, a field rhizotron facility that allows a quasi-non-invasive monitoring of root growth and root zone processes at the field plot scale has been developed. The horizontal installation of 7-m long rhizotubes, which serve as access tubes for minirhizotron cameras, GPR antennas and NMR slimline tool, with minimal invasion so as to preserve the natural soil structure of the sub soil, was a challenge that required specialized technical solutions. Since rhizotron facilities of this extent and in undisturbed field plots have not been constructed before, specialized equipment had to be developed and tested.

Retreat Schleiden 2017 Foto B4 400px

TR 32 Retreat 2017 in Schleiden

Based on observations from the rhizotron facility and on simulations of coupled flow processes in the soil-root system, a macroscopic model for root water uptake was developed and is currently being implemented in the land surface model CLM. It is currently further developed for vegetation with different degrees of lateral root density heterogeneity and different degrees of hormonal control of transpiration. As the rhizotron facility allows mapping the spatial and temporal distribution of root development and water distribution, root development models can be parameterized from these data. The relation between root development and soil conditions such as water content/availability can be derived. Furthermore, it will be investigated if functional relations between root water uptake, root distribution, root development and soil water content distribution can be derived from plant and soil variables that can be monitored at a larger spatial scale and be included in the vegetation model CLM.


Cooperation partner:

6 Member(s):

Andrea Schnepf

Prof. Dr
Andrea Schnepf
Principal Investigator
in B4

Forschungszentrum Jülich
Institute of Bio and Geosciences
Agrosphere (IBG-3)

Wilhelm-Johnen-Strasse
52428 Jülich
Germany

icon phone
icon fax
+49 (0)2461 612658
+49 (0)2461 61 2518
icon mail

a.schnepf@fz-juelich.de

 

 

Jan Vanderborght

Prof. Dr.
Jan Vanderborght
Principal Investigator
in B4

FZ Jülich
Institute of Bio and Geosciences
Agrosphere (IBG-3)

52425 Jülich
Germany

icon phone
icon fax
+49 (0)2461 61 2281
+49 (0)2461 61 2518
icon mail

j.vanderborght@fz-juelich.de

 

 

Gaochao Cai

Master of Engineering
Gaochao Cai
Ph.D. Student
in B4

FZ Jülich
Institute of Bio- & Geosciences
Agrosphere (IBG-3)

52425 Jülich
Germany

icon phone

+49 (0)2461 61 6904

icon mail

g.cai@fz-juelich.de

 

 

Katrin Huber

Dipl.-Ing.(FH), M.Sc.
Katrin Huber
Ph.D. Student
in B4

FZ Jülich
Institute of Bio and Geosciences
Agrosphere (IBG-3)

52425 Jülich
Germany

icon phone

+49 (0)2461 61 9038

icon mail

k.huber@fz-juelich.de

 

 

Shehan Morandage

Master of Science (MSc)
Shehan Morandage
Ph.D. Student
in B4

FZ Jülich
Institute of Bio and Geosciences
Agrosphere (IBG-3)

52425 Jülich
Germany

icon phone
icon fax
+49 (0)2461 61 96652
+49 (0)2461 61 2518
icon mail

t.morandage@fz-juelich.de

 

 

Mirjam Zörner

Mirjam Zörner
Ph.D. Student
in B4

FZ Jülich
Institute of Bio and Geosciences
Agrosphere (IBG-3)


Germany


Former members:

 

● Katrin Huber

 

 

Precipitation radar Uni Bonn

QR-Code
Das Logo der Rheinischen Friedrich-Wilhelms-Universität; Copyright: Uni Bonn  

logo uni koeln 40x40

  logo rwth aachen 40x40   logo juelich   logo geoverbund small