minimising harbour siltation (mhs) - izw - … below chart datum [m] old outer harbour 100 khz old...

PIANCPIANC--KolloquiumKolloquiumYoung Professional GroupYoung Professional Group

28. Juni 2007, Hannover28. Juni 2007, Hannover

MinimisingMinimising HarbourHarbour SiltationSiltation(MHS)(MHS)

PIANC Working Group 43PIANC Working Group 43

H. Nasner

MHS Methods

1. KSO : Keep sediment out – minimisesediment flux to the harbour area.

2. KSM : Keep sediment moving – minimisesediment settling in the harbour area

3. KSN : Keep sediment navigable – takeadvantage of transitional properties of fluidmud or prevent it consolidating so thatships can navigate through the suspension(i.e. nautical depth principle)

4. KSIS : Keep sediment in the system

Sedimentation for B/L, Ports of Bremen

Training Walls in the Outer Weser

Change of cross-section Weser-km 81

Sedimentation Rates and Flood Currents,Neustadt Harbour, 1967 - 1991

Flow and Sedimentation Patterns after Closure ofThe Harbour Channel, Neustadt Harbour, 1992 - 1996

Intake for top-up water in Weser Estuary

Comparision of tide curve v suspended sediment concentrationshowing low values after HW. Shaded area shows offtake period

Map of the German North-Sea CoastEurope

Sounding Map of the Emden Harbourin April 2005 (15 kHz)

Depths[m SKN]

Map of Differences between the 15 kHz- and 210 kHz-Horizon in the Emden Harbour

Sounding in April 2005

Differences between15 kHz and 210 kHz

Self-propelled hopper with underwater pump for infrequentlyfluidising, raising, oxydising & re-depositing fluid mud

Sounding Map of the Fishery Harbour Area in January and February 2002 (15 kHz)

Depths[m SKN]

Map of Differences between the 15 kHz- and 210 kHz-Horizon in the Fishery Harbour Area

Sounding from January and February 2002

Differences between15 kHz and 210 kHz

Water Injection Vessel

Sounding Maps of the Outer Harbours of Brunsbüttel in September 2003 (15 kHz)

Depths[m SKN]

Map of Differences between the 15 kHz- and 100 kHz-Horizonin the Outer Harbours of Brunsbüttel

Sounding from September 2003

Differences between15 kHz and 100 kHz

Longitudinal Sections through the Outer Harbours of Brunsbüttel in September 2003 (15 kHz and 100 kHz)

Distance from Lock [m]

Dep

thbe

low

Cha

rt D

atum

[m]

Old Outer Harbour 100 kHz

New Outer Harbour 100 kHzOld Outer Harbour 15 kHz

New Outer Harbour 15 kHz

Old

Lock

sN

ewLo

cks

Closure of Harbour Channel, Neustadt Harbour, Bremen

Benefit from new top-up water inlet

Water Injection Summary, Port of Bremerhaven

PIANCPIANC--KolloquiumKolloquiumYoung Professional GroupYoung Professional Group

28. Juni 2007, Hannover28. Juni 2007, Hannover

MinimisingMinimising HarbourHarbour SiltationSiltation(MHS)(MHS)

PIANC Working Group 43PIANC Working Group 43

H. Nasner