Institute of

Forest Ecosystems

Institutsleitung

Stellvertretende Institutsleitung

Sekretariat

Daniela Hohenstern
Institut für Waldökosysteme

Alfred-Möller-Straße 1, Haus 41/42
16225 Eberswalde
Phone: +49 3334 3820 300
Fax: +49 3334 3820 354
wo@thuenen.de

Kontaktpersonen für



Modelling the water balance of different forest stands

Research objectives:

The experimental site ‘Britz’ near Eberswalde has a strong research focus on the effect of tree species composition on the forest water balance and groundwater recharge. With nine large-scale lysimeters, installed six meters into the soils, we are collecting data since the 1970s. The intensive and long-time measurements provides the great chance to model the water balance, calibrate, and validate the models in an intensive way.

The models help to understand single processes in the water balance, to analyse the impact of changes in forest structure, tree composition and climate change to water balance, e.g. ground water recharge.

Methods:

  • Data preparation
  • Use of water balance model (e.g. BROOK90, WaSiM-ETH)
  • Model parameterization
  • Calibration, validation
  • Comparison

 

Contact                                                                                                                                                                     Marco Natkhin                                                                                                                              03334/3820-340                                                                                 marco.natkhin@thuenen.de                                                                                                                   Thünen-Institut für Waldökosysteme                                                                                                Alfred-Möller-Straße 1                                                                                                                        16225 Eberswalde

Modelling the water balance of different forest stands

 

 

Determining LAI at plot scale

Research objectives:

The leaf area index (LAI) and the degree of canopy cover are important parameters in forests for the modelling of energy and water balance. There are different methods to determine LAI and each method has it's drawbacks and uncertainties. The aim of this work is to compare different approaches for LAI and the degree of canopy cover determination. What is the best method to get an annual LAI-curve of a small forest area (<1 ha)?

Methods:

Measurements:

  • Specific Leaf Area (SLA in cm²/g) & tree physiology & litter fall traps …
  • UAV-derived LAI data
  • Analysis of hemispherical photographs                                                                                  Fisheye + DSLR –camera +O-Mount&WinSCANOPY                                                             Solariscope SOL300

Statistical analysis

Photogrammetric analysis

Consideration of:

  • Vegetation dynamics
  • Sample design
  • Weather conditions
  • Scale
  • Beech vs. scots pine

Phenological observations

 

Contact:                                                                                                                                              Marco Natkhin                                                                                                                                     03334/3820-340                                                                                                                      marco.natkhin@thuenen.de                                                                                                                                    Thünen-Institut für Waldökosysteme                                                                                                    Alfred-Möller-Straße 1                                                                                                                          16225 Eberswalde

 

Determining LAI at plot scale