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Estimating nutrient uptake of grasslands by assimilating remote sensing data in growth models, a first approach

Dorigo, Wouter (2003) Estimating nutrient uptake of grasslands by assimilating remote sensing data in growth models, a first approach. In: Tagungsbeiträge zum 20. DFD-Nutzerseminar, nur auf CD veröffentlicht!. 20. DFD-Nutzerseminar, 2003-10-6 - 2003-10-8, Neustrelitz.

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Abstract

The possibility will be explored to use a growth prediction model in order to get a clearer understanding of the nutrient uptake by vegetation within differently managed grasslands. A better insight in nutrient fluxes is required for estimating the influence of the different types of grassland use on the water quality of Lake Waging-Taching in the foreland of the Bavarian Alps, Germany. It will be tried to enhance the predictive power of the growth model LINGRA by calibrating it with leaf area index (LAI) values retrieved from multi- and hyperspectral imagery recorded at three time steps during the growing season of 2003. In a first step, LAI, together with other biophysical parameters such as leaf angle distribution and chlorophyll, will be retrieved from the atmospherically corrected imagery by the inversion of the leaf/canopy reflectance model PROSAIL. Ground measurements on three fields of dry biomass, canopy water content, specific leaf weight and soil reflection will be used to fix these parameters during the PROSAIL inversion so that the model is optimized for LAI estimates. After a validation with ground measurements, the LAI values will be used to update the LAI values as simulated by LINGRA. At this moment no concrete results can be presented yet.

Document Type:Conference or Workshop Item (Speech)
Title:Estimating nutrient uptake of grasslands by assimilating remote sensing data in growth models, a first approach
Authors:
AuthorsInstitution or Email of Authors
Dorigo, WouterUNSPECIFIED
Date:2003
Journal or Publication Title:Tagungsbeiträge zum 20. DFD-Nutzerseminar, nur auf CD veröffentlicht!
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Keywords:PROSPECT, SAIL
Event Title:20. DFD-Nutzerseminar
Event Location:Neustrelitz
Event Type:national Conference
Event Dates:2003-10-6 - 2003-10-8
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):E - Gasturbine (old)
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Environment and Security > Environment and Geoinformation
Deposited By: Wouter Dorigo
Deposited On:16 Aug 2006
Last Modified:14 Jan 2010 23:08

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