188
8 Exercises: Fictitious Case Studies
The access of the small harbor via a tidal channel which is part of the mouth of an
estuary discharging into the North Sea (Fig. 8.2). Since decades the access to the small
harbor is getting worse due to siltation. The situation of the catchment area of this tidal
channel has dramatically changed over the last decades due to several changes in the mouth
of the estuary. One of the major changes has been the straightening and deepening of the
main channel of the river. In ancient times, this channel has been decided to be the fairway
for sailing boats. Currently, it is used for container vessels and bulk carrier to the big
harbors in the estuary. Consequently, the side channels, and also the tidal channel to the
small harbor, suffered higher sedimentation rates, for example, due to a decreased current
flow velocity.
Currently, the municipality fears that the situation in the tidal channel will get even
worser and in consequence the access to their small harbor will be interrupted. One of the
Jade
Butjadingen
Bremerhaven
Small harbor for
leisure and fishing boats
Fedderwarder
Tidal Creek
Weser
W
u r s t e r
F e d d e r w a r d e r
C h a n n e l
C h a n n e l
Fig. 8.2 Channel system of the outer Weser excerpt from a map compiled by Ahlhorn et al. (2010).
There are two channels, the “Wurster Channel” and the “Fedderwarder Channel”, where the latter is
the main fairway for container ships and vessels to the harbors Bremerhaven and Bremen down the
river Weser. The southern channel, called Fedderwarder Priel (tidal creek), is the divergence to the
small harbor at the peninsula of Butjadingen.
8 Exercises: Fictitious Case Studies
The access of the small harbor via a tidal channel which is part of the mouth of an
estuary discharging into the North Sea (Fig. 8.2). Since decades the access to the small
harbor is getting worse due to siltation. The situation of the catchment area of this tidal
channel has dramatically changed over the last decades due to several changes in the mouth
of the estuary. One of the major changes has been the straightening and deepening of the
main channel of the river. In ancient times, this channel has been decided to be the fairway
for sailing boats. Currently, it is used for container vessels and bulk carrier to the big
harbors in the estuary. Consequently, the side channels, and also the tidal channel to the
small harbor, suffered higher sedimentation rates, for example, due to a decreased current
flow velocity.
Currently, the municipality fears that the situation in the tidal channel will get even
worser and in consequence the access to their small harbor will be interrupted. One of the
Jade
Butjadingen
Bremerhaven
Small harbor for
leisure and fishing boats
Fedderwarder
Tidal Creek
Weser
W
u r s t e r
F e d d e r w a r d e r
C h a n n e l
C h a n n e l
Fig. 8.2 Channel system of the outer Weser excerpt from a map compiled by Ahlhorn et al. (2010).
There are two channels, the “Wurster Channel” and the “Fedderwarder Channel”, where the latter is
the main fairway for container ships and vessels to the harbors Bremerhaven and Bremen down the
river Weser. The southern channel, called Fedderwarder Priel (tidal creek), is the divergence to the
small harbor at the peninsula of Butjadingen.