Sediment deposition and sediment management at the Iffezheim ...
Sediment deposition and sediment management at the Iffezheim barrage
Dipl.-Ing. Kai Kempmann Waterways and Shipping Administration of the Federal Government Waterways and Shipping Office Freiburg, Germany
Sediment deposition and sediment management at the Iffezheim barrage
Introduction Historical overview Sediment deposition Sediment quality Short term approaches Long term approaches
10/24/2012
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Introduction
Europe Germany Catchment
10/24/2012
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Introduction
Upper Rhine regulated
10/24/2012
free flowing
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Introduction
The Problem: sediments have effect on water level 130,00
Q=7 500 m³/s Zvmax height of side dam 129,00
Freeboard 0.20 m
128,00
127,00
126,00
125,00
124,00 312,00
10/24/2012
314,00
316,00
318,00
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
320,00
322,00
324,00
326,00
328,00
330,00
332,00
334,00
Historical Overview
Dredging campaigns 1978
start of operation
1981 – 1984 flushing campaigns 1989 – 1997 construction of mole in headwater 2000
1-D modeling of impoundment (freeboard)
2000 – 2005 construction of mole in tailwater 2005 – 2006 flushing operation (suspended) 2006
2-D modeling of impoundment (freeboard)
2010 – 2011 dredging and transportation to Netherlands
10/24/2012
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Historical Overview
Status Quo at Iffezheim Barrage Flushing operations not possible due to sediment quality No ex-situ or landfill disposal of dredged material in Germany or France Reuse of material is not economical Treatment of material is very cost intensive Deposition in weir channel reaches pre-defined limit state Average annual rate of deposition 115 000m³
⇒ Biannually dredging campaigns (average Volume of 230 000 m³ at 7 Mio. € cost)
10/24/2012
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Sediment Deposition
Average annual load of suspended material
significant drop of
annually suspended load
mean annual
10/24/2012
suspended load
regulated
free flowing
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Sediment Deposition
Accumulated annual dredging at the Upper Rhine Dredging campaigns at the Upper Rhine between Kembs and Iffezheim 360 350 340 330 320 310 300
1.000.000
290
Rheinkm
280 270
500.000
260 250
100.000
240
50.000
230
10.000
220
5.000
210 200
WSA Freiburg SNS / VNF EdF Hafen Straßburg Maßstab
190 180 170 1988
10/24/2012
1990
1992
1994
1996
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
1998
2000
2002
2004
2006
2008
2010
Sediment Quality
Anomaly of HCB in Rhine sediments Hexachlorbenzene is a fungicide formerly used as a seed treatment to control the fungal disease bunt. It has been banned globally under the Stockholm Convention on persistent organic pollutants.
10/24/2012
correlation of HCB in fines
correlation of HCB in fines
fraction < 20 µm
fraction 60 - 200 µm
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Sediment Quality
Inhomogeneous distribution of HCB in dredge field in the upper weir channel
10/24/2012
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Short term approach to solutions
Processing of dredged material (dewatering / fractionation) Determination of a sustainable dredging profile Reducing cost of land disposal
10/24/2012
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Short term approach to solutions
Processing of dredged material (dewatering / fractionation) FILTRATEC
Dewatering
cost as function of dewatering efficiency
to reduce transportation and disposal cost.
35 € 30 €
Latest calculation shows average cost between 15 €/m³ to 50 €/m³
25 € 20 € €/m³ 15 €
Fractionation only works if high contaminated sediment fractions can be precisely identified and separated. High contaminated material will be disposed and unpolluted material will be put back in system.
10/24/2012
10 € 5€ 0€ Total cost
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
0%
30%
40%
50%
60%
27 €
32 €
30 €
27 €
25 €
Volume reduction
Diethelm
Long term approach to solutions
Feasibility study on remediation of high contaminated areas under consideration of economic efficiency (WSA) Studies on sediment passability (BfG) numeric modeling of hydraulic and sediment deposition patterns in the upper weir channel (BAW)
10/24/2012
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Long term approach to solutions Studies on sediment passability (BfG) Software SSIIM, 3D-Model, suspended sediments
ADCP
modell
ADCP
modell
10/24/2012
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Long term approach to solutions
numeric modeling of hydraulic and sediment deposition patterns in the upper weir channel (BAW) 2-D model of impoundment based on Rismo2D. Model is used to calculate effects on water level and effects caused by weir and lock control. 3-D model of impoundment based on Telemac3D in preparation in cooperation with university of Aachen. Model will be able to simulate suspended material in the impoundment. 3-D model of weir in preparation. 10/24/2012
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Thank you for your attention! Dredging in the 21st Century! Special Thanks to:
• Dr. Stefan Vollmer, BfG • Dr. Gudrun Hillebrand, BfG • Dr. Vera Breitung, BfG • Dr. Michael Schroeder, BAW • Dr. Andrea Wahrheit-Lensing, BAW Dipl.-Ing. Kai Kempmann Wasser- und Schifffahrtsamt Freiburg Stefan-Meier-Str. 4-6, 79104 Freiburg, Germany
• Dipl.-Ing. Udo Seidenkranz, WSA
Dipl.-Ing. Kai Kempmann Waterways and Shipping Administration of the Federal Government Waterways and Shipping Office Freiburg, Germany
Sediment deposition and sediment management at the Iffezheim barrage
Introduction Historical overview Sediment deposition Sediment quality Short term approaches Long term approaches
10/24/2012
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Introduction
Europe Germany Catchment
10/24/2012
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Introduction
Upper Rhine regulated
10/24/2012
free flowing
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Introduction
The Problem: sediments have effect on water level 130,00
Q=7 500 m³/s Zvmax height of side dam 129,00
Freeboard 0.20 m
128,00
127,00
126,00
125,00
124,00 312,00
10/24/2012
314,00
316,00
318,00
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
320,00
322,00
324,00
326,00
328,00
330,00
332,00
334,00
Historical Overview
Dredging campaigns 1978
start of operation
1981 – 1984 flushing campaigns 1989 – 1997 construction of mole in headwater 2000
1-D modeling of impoundment (freeboard)
2000 – 2005 construction of mole in tailwater 2005 – 2006 flushing operation (suspended) 2006
2-D modeling of impoundment (freeboard)
2010 – 2011 dredging and transportation to Netherlands
10/24/2012
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Historical Overview
Status Quo at Iffezheim Barrage Flushing operations not possible due to sediment quality No ex-situ or landfill disposal of dredged material in Germany or France Reuse of material is not economical Treatment of material is very cost intensive Deposition in weir channel reaches pre-defined limit state Average annual rate of deposition 115 000m³
⇒ Biannually dredging campaigns (average Volume of 230 000 m³ at 7 Mio. € cost)
10/24/2012
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Sediment Deposition
Average annual load of suspended material
significant drop of
annually suspended load
mean annual
10/24/2012
suspended load
regulated
free flowing
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Sediment Deposition
Accumulated annual dredging at the Upper Rhine Dredging campaigns at the Upper Rhine between Kembs and Iffezheim 360 350 340 330 320 310 300
1.000.000
290
Rheinkm
280 270
500.000
260 250
100.000
240
50.000
230
10.000
220
5.000
210 200
WSA Freiburg SNS / VNF EdF Hafen Straßburg Maßstab
190 180 170 1988
10/24/2012
1990
1992
1994
1996
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
1998
2000
2002
2004
2006
2008
2010
Sediment Quality
Anomaly of HCB in Rhine sediments Hexachlorbenzene is a fungicide formerly used as a seed treatment to control the fungal disease bunt. It has been banned globally under the Stockholm Convention on persistent organic pollutants.
10/24/2012
correlation of HCB in fines
correlation of HCB in fines
fraction < 20 µm
fraction 60 - 200 µm
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Sediment Quality
Inhomogeneous distribution of HCB in dredge field in the upper weir channel
10/24/2012
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Short term approach to solutions
Processing of dredged material (dewatering / fractionation) Determination of a sustainable dredging profile Reducing cost of land disposal
10/24/2012
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Short term approach to solutions
Processing of dredged material (dewatering / fractionation) FILTRATEC
Dewatering
cost as function of dewatering efficiency
to reduce transportation and disposal cost.
35 € 30 €
Latest calculation shows average cost between 15 €/m³ to 50 €/m³
25 € 20 € €/m³ 15 €
Fractionation only works if high contaminated sediment fractions can be precisely identified and separated. High contaminated material will be disposed and unpolluted material will be put back in system.
10/24/2012
10 € 5€ 0€ Total cost
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
0%
30%
40%
50%
60%
27 €
32 €
30 €
27 €
25 €
Volume reduction
Diethelm
Long term approach to solutions
Feasibility study on remediation of high contaminated areas under consideration of economic efficiency (WSA) Studies on sediment passability (BfG) numeric modeling of hydraulic and sediment deposition patterns in the upper weir channel (BAW)
10/24/2012
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Long term approach to solutions Studies on sediment passability (BfG) Software SSIIM, 3D-Model, suspended sediments
ADCP
modell
ADCP
modell
10/24/2012
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Long term approach to solutions
numeric modeling of hydraulic and sediment deposition patterns in the upper weir channel (BAW) 2-D model of impoundment based on Rismo2D. Model is used to calculate effects on water level and effects caused by weir and lock control. 3-D model of impoundment based on Telemac3D in preparation in cooperation with university of Aachen. Model will be able to simulate suspended material in the impoundment. 3-D model of weir in preparation. 10/24/2012
Dipl.-Ing. Kai Kempmann, Waterways and Shipping Office Freiburg, Germany
Thank you for your attention! Dredging in the 21st Century! Special Thanks to:
• Dr. Stefan Vollmer, BfG • Dr. Gudrun Hillebrand, BfG • Dr. Vera Breitung, BfG • Dr. Michael Schroeder, BAW • Dr. Andrea Wahrheit-Lensing, BAW Dipl.-Ing. Kai Kempmann Wasser- und Schifffahrtsamt Freiburg Stefan-Meier-Str. 4-6, 79104 Freiburg, Germany
• Dipl.-Ing. Udo Seidenkranz, WSA
