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Water body Monitoring
Satellite data is suitable for various questions concerning water body monitoring.
Example 1
The airborne imaging spectrometer AVIS [
pdf, 1.0 MB] offers detailed information for the derivation of dissolved matter in water bodies because of its hyperspectral data and its high spectral sensitivity.
Fig. 1: Spectral analysis of a lake. Neighbouring areas of water and vegetation show different chlorophyll contents
Fig. 2: Water quality in Main. Various parameters like turbidity, submerged as well as surface macrophytes and chlorophyll content can be analyzed.
Example 2
Rapid growing of Elodea nuttallii can be problematic for water sports in shallow lakes. Using satellite data, snapshots as well as changes over time can be analyzed.
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Fig. 3: Snapshot of a lake where a spectral macrophyte classification (right) was performed to allow for monitoring of Elodea.
Example 3
Often a multitemporal observation of the macrophytes is useful. With this, spatial changes in the affected area can be observed.
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Fig. 4: Spectral classification of macrophytes in a reservoir in July (left) and August (middle) and
map of the increase or decrease in macrophytes between these months (right).
Areas of interest in water body monitoring are also found here:
Derivation of chlorophyll content of water bodies
Derivation of suspended matter
Classification of the reed zone