River (re-)balanced! Why are the small parts in the water so important?

Transcription

1 River (re-)balanced! Why are the small parts in the water so important? German Water Partnership Forum Berlin Wasser International Messe, Berlin, Germany, Dr. Dietrich Bartelt, DB Sediments GmbH, Germany

2 DB Sediments GmbH Based on Environmental Know how! Founded on in Duisburg, Germany! Founders experts each with more than 20 years of international utility back ground, project management, renewable energies! Management experience, environmental leadership! International research programs since 1994 (i.e. 5th EU FWP, )! Innovation Management! Environmental Technology Made in Germany Headquarter at Tectrum Technologie Zentrum Berlin Wasser International,

3 DB Sediments Member of German Water Partnership (GWP)! The German Water Partnership is a joint initiative of the German private and public sectors, combining commercial enterprises, government and nongovernment organizations, scientific institutions and water-related associations.! Founded in April 2008, it has now 370 member companies! Achieve international awareness of German excellence in water technology and water management! Germany has more than 150 years of experience in successful water management. Efficiency in plant engineering, consulting and operation is complemented by unparalleled expertise in scientific research, education and training, and by high levels of institutional and administrative knowledge. Berlin Wasser International,

4 Use Water Store Water Impacting the Ecosystem Hydro Power Drinking Water Irrigation Flood Protect. Berlin Wasser International,

5 Sediment Mismanagement Signs of unbalanced rivers Pakistan, August 2010 Quelle: AG Friedensforschung; by DB Sediments Berlin Wasser International,

6 River Unbalanced World Bank: The last century was used to build reservoirs. This one will be used to solve sediment problems. Berlin Wasser International,

7 Global Water Storage Capacity DAM CONSTRUCTION AND GLOBAL POPULATION Source: Annandale, G. (2014) Sustainable SUSTAINABLE WATER SUPPLY AND CLIMATE CHANGE Berlin Wasser International,

8 Global Water Storage Capacity Increasing Loss Global Storage Capacity [Billion m³] Source: Based on data from Jenzer and Cesare (2005) and GWSP Digital Water Atlas (2008) Berlin Wasser International,

9 Global Risk Perception Survey 2015 Environmental Risks are most likely and have highest impact Environmental Risks directly and indirectly linked to the topic of sedimentation Water Crisis Extreme weather events Natural catastrophes Man-made environmental catastrophes Biodiversity loss and ecosystem collapse Climate change Source: World Economic Forum; Global Risks Perception Survey ; Berlin Wasser International,

10 Value of Water Storage Decreasingly falling without/stable with Sediment Management Operation lifetime (i.e. 20 to 30 years) Berlin Wasser International,

11 The Use of Water Impact to the Ecosystem There is more than water that flows in a river The reduction of velocity causes sedimentation and siltation Berlin Wasser International,

12 The Two Sides of Sedimentation Sediment Surplus upstream / Sediment Deficit downstream (CO 2, CH 4 ) 2014 by DB Sediments Berlin Wasser International,

13 The Two Sides of Sedimentation Methane emissions in dammed water bodies Berlin Wasser International,

14 Problems without Sediment Example: Sediment deficit River Rhine Sedimentdeficit D/NL-boarder: about t/a artificial adding of Sediments about t/a Locks Iffezheim: about t/a " Adding Sediments is expensive " 2012: WSA Duisburg 24 Mio. Source: Alpreserve *, Bundesanstalt für Wasserbau (Koblenz), Hülskens Wasserbau (Wesel) WSA DU, Berlin Wasser International,

15 Wave Dynamics Qualitative Change with/without Sediment Transport Wave without Sediment Wave with Sediment Berlin Wasser International,

16 A river is an Eco-system Sediments are an integral part of this system Source: Global Water System Project Berlin Wasser International,

17 Sediment Deficit Coast Erosion (e.g. Egypt, ) Source: Google Maps (2011) Berlin Wasser International,

18 Mississippi River System Decoupling of water and sediment flows Quelle: Meade, R. H. (2010). Sediment Transport and Deposition in Rivers: The Case for Non-Stationarity. In World Bank Group (Ed.): World Bank Document, A REVIEW OF SELECTED HYDROLOGY TOPICS TO SUPPORT BANK OPERATIONS. Papers from the Workshop (pp , Annex)., National Geographics, May 2014 Berlin Wasser International,

19 Sediment Mismanagement Death Threat to the Delta (eg Mississippi) New Orleans Source: Don Swenson (2012) The Rise and Disappearance of Southeast Louisiana. Berlin Wasser International,

20 Handling Sedimentation Issues Current Ways and attempts to try to solve the problem Not doing anything Flushing Dig and Dump # Dredge, Spill, Dig and Dump # # Berlin Wasser International, #

21 Sediment Flushing of a Reservoir Largely ineffective and very expensive Reservoir after flushing ECONOMICAL LOSS: 6 Mio. $ per flushing! Velocity (cm/s) Grain size (mm) source: URL: Berlin Wasser International,

22 Sediment Flushing of a Reservoir Langmannsperre, Austria, Reservoir after flushing Very inefficient: large amounts of Sediments remain in the reservoir! Berlin Wasser International, This what it would it look like with The DB Sediments Approach. 21

23 ConSedTrans Method System Sensitive Solution - Continuous Transfer of Sediments Berlin Wasser International,

24 Global Award Winning, Patented Approach Continuous Sediment Transfer Global patented technological approach to solve the problems of sedimentation in a system sensitive approach i.e. Award of Excellence as leading global sustainable technology Nomination for the Innovation Award of German Industry Berlin Wasser International,

25 RWE Innogy GmbH Kontinuierliches Sediment Management in Olsberg seit 2011 Berlin Wasser International,

26 Olsberg Reservoir (Germany) Berlin Wasser International,

27 RWE Innogy GmbH Continuous Sediment Management in Olsberg, Germany Berlin Wasser International,

28 Suitable equipment System Sensitive Solution! automated vessel size 1! dredge vessel size 2 - diesel driven - depth up to 15 m! Electric driven dredge vessel! Larger/other/additional and - depth up to up to more than 40 m customized equipment upon request: - electric or diesel driven - dredging depth up more than 200 m - unlimited capacity and/or sediment transfer range Berlin Wasser International,

29 Risk Analysis Existing and Projected Dams! Assessment of the original storage volume - by processing of the original layout of the reservoir! Determination of - the lost, silted or sedimented volume of the reservoir, - the silting rate of the dam, and - the estimation of the probable dam life, under consideration of the necessary operational range of the reservoir.! Furthermore, an analysis will comprise - possible consequences, like the blockage of the bottom outlet of the dams by sliding sediments and - risk of flooding caused by the reduction of the retention volume of the reservoir. Berlin Wasser International,

30 Roseau Reservoir St. Lucia Risk Analysis / Rehabilitation Dam/Reservoir Berlin Wasser International,

31 Sustainable Storage Capacity Strategy How to proceed! Study the access of the sedimentation problem - Bathymetric Survey, framework conditions, site specific issues,...! 1st stage: at least keep the existing stage/don t let it get worse - Continuous transfer of what comes into the reservoir must be transferred! 2nd stage: - Continuous improvement and rehabilitation of the lost storage capacity. - Improvement and duration is depending on the quantity of water that is available for further transfer to the downstream. Berlin Wasser International,

32 Nurek Dam, Tajikistan Site, Sedimenttransport Berlin Wasser International,

33 Businessplan Example Overcome Dig&Dump Method ConSedTrans - Management Digging: twice, every 10 years Costs about 2.6 to 3.0 Mio. Euro Problem, shortly after digging, the reservoir is continuing filling again Continuing transfer cost about 1.5 Mio. Euro (distributed over 20 years) Always 100 % of the reservoir capacity/no outage Savings of about 50 % of direct costs Berlin Wasser International,

34 Business Case (small case) Compare: common and sustainable approach! Common approach:! ConSedTrans Approach of DB Sediments! Clearing of the reservoirs! Necessary every 10 years! Costs: about 1.2 to 1.5 Mio. Euro! Costs of continuous transfer:! Installation: Mio. Euro! Operation&Maintainance: 0,06 Mio. Euro/a Millionen Herkömmliche Beräumung ConSedTrans - Verfahren Berlin Wasser International,

35 ConSedTrans Method with Options Integration with hydro power solutions Award on Innovative Achievements in the area of Renewable Energies and Environment Technology can be combined to further hydro power production Source: DB Sediments (2014); WGZ Bank (2012); Berlin Wasser International,

36 Hydro Power Overview Types of Turbines/Screws 2 Berlin Wasser International,

37 Sediment Management What you do (or dont do) is what you see! Forggensee (Lech) Source: EOMAP (2014) Turbidity Flows on Lech / Donau Berlin Wasser International,

38 Final Remarks Bringing the Rivers back to Balance Dramatic developing decrease of global storage capacity for water The River is an Ecosystem - Sediments are an important part of the system Proper Flood Management needs Proper Sediment Management There is an urgent need for a holistic sediment management in rivers and reservoirs The impact of using water can be compensated by continuous sediment transport There is no economic solution without an ecological solution The ConSedTrans- Method can contribute to handle the risk of sedimentation and siltation, flooding, soil and coast erosion, and saltation of groundwater Berlin Wasser International,

39 Holistic Solution with SECO Benefits Multidimensional Benefits Social Environmental Commercial Operational Berlin Wasser International,

40 Current Award and Recognition At the Ceremony for the Innovation Award of German Industry Berlin Wasser International,

41 If you cut the transport of sediment in a river you kill life in the river, as well as in the delta area of the river in the ocean. Juan Pablo Orrego Silva, Alternative Nobel Prize Winner, Bonn, Germany, , referring to studies of Hucke-Gaete, Viddi and Bello, 2006 DB Sediments GmbH Bismarckstr. 142 D Duisburg, Germany T F info@db-sediments.com Berlin Wasser International,