86
R. Romeiser et al.
0.0
Current [m/s]
≥1.2
30
Depth [m]
0
(a)
(b)
)
d
(
)
c
(
Fig. 5.9 Bathymetry retrieval example; (a) airborne ATI-derived current field north of the German
island of Sylt; area size = 3.5 km × 3.5 km, grid resolution = 25 m × 25 m; (b) depth map from
echosoundings with an effective resolution of 200 m; (c) 78 selected reference depth points near the
boundaries; (d) depth map derived from the reference depths in combination with the ATI-derived
current field
high-resolution and consistent wind, wave, and surface current measurements in
combination with theoretical investigations are required. SAR/ATI-based measurements can make a significant contribution to this specific research as well as to
similar offshore engineering tasks.
5.4.5 River Runoff Monitoring
Another promising field of application is the monitoring of river runoff, which is
important for coastal oceanography, hydrology, and climate research. Furthermore,
the redistribution of water due to climate changes and changes in population,
industrialisation, and land use can have major effects on the earth system and on economical and political developments. At present, many rivers are monitored locally,
and data from stations throughout the world are collected and archived at the Global
R. Romeiser et al.
0.0
Current [m/s]
≥1.2
30
Depth [m]
0
(a)
(b)
)
d
(
)
c
(
Fig. 5.9 Bathymetry retrieval example; (a) airborne ATI-derived current field north of the German
island of Sylt; area size = 3.5 km × 3.5 km, grid resolution = 25 m × 25 m; (b) depth map from
echosoundings with an effective resolution of 200 m; (c) 78 selected reference depth points near the
boundaries; (d) depth map derived from the reference depths in combination with the ATI-derived
current field
high-resolution and consistent wind, wave, and surface current measurements in
combination with theoretical investigations are required. SAR/ATI-based measurements can make a significant contribution to this specific research as well as to
similar offshore engineering tasks.
5.4.5 River Runoff Monitoring
Another promising field of application is the monitoring of river runoff, which is
important for coastal oceanography, hydrology, and climate research. Furthermore,
the redistribution of water due to climate changes and changes in population,
industrialisation, and land use can have major effects on the earth system and on economical and political developments. At present, many rivers are monitored locally,
and data from stations throughout the world are collected and archived at the Global