Integrated Waterway Management of the Danube in Austria

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2 Integrated Waterway Management of the Danube in Austria Thomas Hartl / Senior Expert Waterway Management via donau Österreichische Wasserstraßen-Gesellschaft mbh Vienna, October 14, 2014

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4 Figures and facts Founded in 2005 on the legal basis of the Austrian Waterway Act 100% ownership by the Federal Ministry for Transport, Innovation and Technology 270 employees 4 Service Centres along the Danube, main office in Vienna 9 Danube lock facilities to operate Page 4

5 The Danube as a multifunctional system recreation transport ecology nature reserve agriculture Danube flood control tourism drinking water energy fishery Page 5

6 Our three company pillars Economy Environment Safety The integrative approach is inherent to the waterway system! Page 6

Three company pillars Economy Infrastructure management ensuring the availability of an efficient and reliable waterway infrastructure (maintenance and improvement) collection and

7 Three company pillars Economy Infrastructure management ensuring the availability of an efficient and reliable waterway infrastructure (maintenance and improvement) collection and provision of hydrographic and hydrological basic data Logistics and ports development of cost-effective logistics solutions on the Danube river in cooperation with private business

Three company pillars Environment Renaturation projects Free-flowing sections of the Danube: Wachau, east of Vienna Morava river Ship emission

8 Three company pillars Environment Renaturation projects Free-flowing sections of the Danube: Wachau, east of Vienna Morava river Ship emission reduction improving the environmental performance of inland navigation Climate change development of potential adaptation strategies for climate change

Three company pillars Safety Flood control via donau ensures the safety of more than 500,000 people reconstruction of the flood control dyke on the Morava and

9 Three company pillars Safety Flood control via donau ensures the safety of more than 500,000 people reconstruction of the flood control dyke on the Morava and the lower Thaya rivers Traffic management national provider of River Information Services (RIS) in Austria (DoRIS) supervision and traffic control at river locks

Federal waterways in Austria Danube: 350.45 km Danube Canal (Vienna): 17.

10 Federal waterways in Austria Danube: km Danube Canal (Vienna): km Danube tributaries Traun (1.80 km), Enns (2.70 km) and March (6.00 km) In sum, km of public waterways Page 10

11 Nautical situation 75 % impounded 25 % free-flowing Wachau Lock Main office Service Centre east of Vienna 10 lock facilities with specific paramters (width and length) 2 free-flowing sections with fairway restrictions (depth and width) Page 11

12 Infrastructure restrictions Usable lock dimensions on the Austrian Danube: 230 x 24 m = UNECE waterway class VIb (4-unit pushed convoy) maximum encounter case = two 4-unit pushed convoys Pushed convoy (pusher + 4 Europe II B lighters) l = 188 m; b = 22.0 m; t max = 2.7 m (6,800 t) Page 12

13 Traffic per type of vessel Configuration of pushed convoys (pusher + pushed lighters) at the Freudenau lock in 2012 (trips) Configuration of coupled convoys (motor cargo vessel + pushed lighters) at the Freudenau lock in 2012 (trips) Page 13

14 Traffic per type of vessel 19 vessels per day on average (peak in summer from May to September due to passenger transport) Ratio of individual vessels to convoys = 52% : 48% 51.6% of all trips are performed by individual vessels 26.5% of all trips by pushed convoys with two barges 11.5% of all trips by coupled convoys with one barge Vessel/convoy type Melk 2012 Altenwörth 2012 share [%] Single vessels (1/2/3/4) ,6% Coupled convoy 1xbarge (5a) ,5% Coupled convoy 2xbarge (5b) ,5% Coupled convoy 3xBarge (5c) ,3% Pushed convoy 1xbarge (7a) ,3% Pushed convoy 2xbarge (7b) ,5% Pushed convoy 3xbarge (7c) ,2% Pushed convoy 4xbarge (7d) ,2% Total number vessels ,0% Page 14

15 Strategy: the fairway maintenance cycle Philosophy: "the whole is greater than the sum of its parts" Page 15

16 Customer-oriented waterway management Surveying Dredging Information Page 16

17 Riverbed surveying on the Austrian Danube Standard: twice per year complete surveying of free-flowing sections: March + October: east of Vienna April + November: Wachau 50 m standard profiles and 25 m profiles in sections with critical locations Equipment: single beam + multi beam Page 17

18 Riverbed surveying on the Austrian Danube Monitoring of critical locations: Additional surveying of critical locations according to catalogue of shallow sections in July each year prior to low-water period Additional monthly surveying of critical locations (prioritisation) Page 18

19 Riverbed surveying on the Austrian Danube Quality control of dredging works: Survey of dredging area prior to and after performance of dredging by assigned company supplementary claims, if necessary Equipment used: multi-beam Page 19

20 Multi-beam surveying Ford Rothenhof after dredging: km / April 2012 Page 20

21 Multi-beam surveying numerical depth values Ford Rothenhof after dredging: km / April 2012 Page 21

22 Multi-beam surveying published information Ford Rothenhof after dredging: km / April 2012 Page 22

23 Free-flowing sections of the Danube Wachau valley (river-km 2, to1,998.00): From river power plant Melk to the Port of Krems East of Vienna (river-km 1, to 1,872.70): From river power plant Freudenau to Austrian-Slovakian border Page 23

24 Critical locations on the Austrian Danube Identification of critical locations on the two free-flowing secions of the Austrian Danube in line with "caution areas" in Inland ECDIS charts Catalogue of fords and lateral accumulations in sum 36 critical locations of which 19 are critical Prioritisation according to urgency for intervention East of Vienna: 7 fords + 6 lat. accum. Wachau valleay: 5 fords + 1 lat. accum. lateral accumulation ford lateral accumulation Page 24

25 Wachau: critical locations Fords: Lateral accumulations: Page 25

26 East of Vienna: critical locations Fords: Lateral accumulations: Page 26 Page 26

Long-term frequency of low-water periods Exceedance of low navigation & regulation level (LNRL) + 0.

27 Long-term frequency of low-water periods Exceedance of low navigation & regulation level (LNRL) metres ( ) and average monthly load factor of vessels Exceedance frequency [%] JAN - FEB 40-45% MAR 20% APR - AUG 0-5% SEP 25% OCT - DEC 50-55% Average monthly load factor [dm] Months Page 27

28 Prioritisation of measures Why prioritise? Waterway users need sufficient fairway depths in low-water periods need to remove critical locations as fast as possible and prior to low-water periods The weakest location on a specific stretch determines the possible draught loaded of a vessel Once the weakest spot has been eliminated, the second weakest spot determines the draught loaded etc. Determining factors: Limited dredging capacity on the market; suitability of equipment for free-flowing river; time needed for receiving official notifications (environmental, navigation law) Page 28

29 Optimisation of time frame for dredging Optimal timeframe for most urgent dredging works Dredging works for most critical shallow sections shall take place at the beginning Page 29 of autumn (starting from September) before the potential low water period!

Sample schedule for prioritised dredging (1) July 2013: Hydrographical survey of critical location in freeflowing sections (2) Beginning of Aug.

30 Sample schedule for prioritised dredging (1) July 2013: Hydrographical survey of critical location in freeflowing sections (2) Beginning of Aug. 2013: Briefing for dredging works; prioritisation of measures (3) Beginning of Sept. 2013: Start of dredging works at priority locations in both freeflowing sections Page 30

31 Some facts on dredging Cubature: annually ~ 300,000 to 400,000 m 3 in both free-flowing sections taken together Dredged material: gravel (in fairway; mean gravel size = 26 mm; but up to 120 to 150 mm) fine sediments (in reservoirs, at berthing areas, in port access channels) Budget: annually ~ 4 to 6 million EUR Execution: contracting of private companies Page 31

32 Determining factors for dredging Discharge (in free-flowing section east of Vienna): LNQ = 980 m 3 /s MQ = 1,930 m 3 /s HQ = 10,400 m 3 /s Mean flow velocity (in free-flowing sections): ~ 7 km/h at low navigable water level ~ 12 km/h or more at higher water levels (MWL) Fairway width: between 100 and 120 m in straight sections (more in bend) Page 32

33 Levels of service as a strategy for prioritisation Identification of the width of the "traffic lane" needed by vessels/convoys for critical locations in the two free-flowing stretches of the Austrian Danube waterway in consideration of different curve radii on critical stretches of the waterway on the basis of three general traffic situations ("encounter cases" or "levels of service") Fairway depth of 2.5 m at LNWL (ENR) (= 343 days/year) Page 33

34 Levels of service: encounter cases Maximum encounter case: The critical encounter probability in oncoming traffic for two 4-unit pushed convoys is less than once a week Most probable encounter case: Individual vessel encountering a 2-unit pushed or coupled convoy Page 34

35 Fairway widths and vessel types Definition of fairway LoS in Austria is based on studies published by the DST Duisburg (Development Centre for Ship Technology and Transport Systems) The chart visualizes the assumed distances for the passing of two 4-unit convoys navigating through water at 14 km/h at a flow velocity of the river of 6 km/h Page 35

36 3 levels of service in fairway maintenance Traffic situation: Level 1 Convoy of max. dimension* going downstream in oneway traffic Level 2 Convoy of max. dimension* going downstream meets motor cargo vessel going upstream Level 3 Encounter of two convoys of max. dimension* Width of "traffic lane" according to curve radii: < 1,000 m 80 m 120 m 160 m 1,000-1,500 m 60 m 100 m 120 m > 1,500 m 40 m 80 m 100 m * According to waterway class foreseen for this stretch (UNECE / DC) Page 36

Principle of fairway continuity Establish the continuity of the fairway as fast as possible + prior to low-water periods (proactive maintenance) = LoS 1 Increase the availability of the fairway step

37 Principle of fairway continuity Establish the continuity of the fairway as fast as possible + prior to low-water periods (proactive maintenance) = LoS 1 Increase the availability of the fairway step by step, starting with the most critical location Provide the availability of the entire fairway width in a sequential manner = LoS 2 + LoS 3 Priority 3 Priority 2 Priority 1 Level of Service 1 Priority 6 Priority 5 Priority 4 Page 37

38 Example: Ford Regelsbrunn east of Vienna Page 38

39 Ford Regelsbrunn: LoS parameters Excerpt from the catalogue of critical locations: name kind position - right - centre - left curve radius - upstream - centre - downstream LoS 1-3 fairway width area of critical location Page 39

40 Ford Regelsbrunn: LoS 1 = 40 m width Page 40

41 Ford Regelsbrunn: LoS 2 = 80 m width Page 41

42 Online information on critical locations Distribution via web service to different (online) media: DoRIS website (Donau River Information Services) and DoRIS mobile app for smart phones etc. Danube FIS portal (Fairway Information Services) Page 42

43 Online information on critical locations Page 43

44 LoS for statistical purposes (LoS 1 in 2013) Availability of LoS 1 in free-flowing sections 2013: Wachau: 98% (6 / 365) East of Vienna: 86% (50 / 365) Page 44

45 Thank you for your attention Contact Mag. Thomas Hartl, MAS Senior Expert Waterway Management Phone Donau-City-Straße 1, 1220 Vienna, Austria Page 45

SPEECH. by Deputy Director-General of the Danube Commission s Secretariat. Mr. Pjotr Suvorov. (Linz, April 2013)

SPEECH. by Deputy Director-General of the Danube Commission s Secretariat. Mr. Pjotr Suvorov. (Linz, April 2013) SPEECH by Deputy Director-General of the Danube Commission s Secretariat Mr. Pjotr Suvorov on the 5 th Meeting of the Steering Group for Priority Area 1a of the EUSDR (Linz, 17-18 April 2013) At the 3