1. GREAT LAKES OF LOMBARDY Navigation
NATURAL RESOURCES MANAGEMENT
&
INTEGRATED WATER RESOURCES MANAGEMENT
Politecnico di Milano Sede di Como
Instructor
Prof. David E. Rosenberg
Teaching Assistant
Andrea Cominola
Prepared by
Ahmed Elwaleed
Semih Tastekin
Stefan Velkovski
Como, Italy

2. GREAT LAKES OF LOMBARDY
Subject: Navigation
Stakeholder: Boat company: Gestione Navigazione Laghi – Lombardy, Italy
Considered Area:
Como Lake Maggiore Lake
Piazza Cavour Sesto Calende

3. Motivation of Study
Learning the relationship between water levels and navigation in Great Lakes of Lombardy.
Defining the performance indicator (reliability) of navigation activities with respect to lake levels.
Increasing the reliability of navigation by regulating the lake levels with minimum harm to other stakeholders by different scenarios.

4. Problems Como 2014 Como 2002 Como 2014 1) High Level (Flood Case)
- Debris
- Loss of Land Connection
Como 2014
Como 2002
Como 2014

5. Problems Maggiore 2008 Maggiore 2008 2) Low Level
- Crash possibility at docking
- Obstacles at below
Maggiore 2008
Maggiore 2008

6. The Model The elements used in WEAP Model
Reservoirs, Minimum requirement flows, Rivers

7. The Data Used from WEAP model.
- Storage Volumes (m3)
- Release (Outflow) Water Volumes (m3)
- Storage Elevation Levels (m)

8. Thresholds Como Lake Maximum level threshold: 198.67 m.
Minimum level threshold: m.
Maggiore Lake
Maximum level threshold: m.
Minimum level threshold: m.

9. Performance Indicators
Reliability
1) Reliability of Navigation with respect to high lake level.
2) Reliability of Navigation with respect to low lake level.

10. Performance Indicators
1) Reliability of Navigation
with respect to low lake level.   
𝑅 % = 𝑁 𝑤ℎ𝑒𝑛 𝑊𝑒≥𝑇𝑚 𝑁 x (1)
N – Total number of days
We  – Water elevation at any time
Tm   – Threshold of min water level for navigation

11. Performance Indicators
2) Reliability of Navigation
with respect to high lake level.   
𝑅 % = 𝑁 𝑤ℎ𝑒𝑛 𝑊𝑒≤𝑇𝑓 𝑁 x (2)
N – Total number of days
We  – Water elevation at any time
Tf  – Threshold of flood

12. no_flood = (available_water <= volume_flood)
volume_flood = (207.51*(h_flood RefL) + ½ * 4.65 * (h_flood - RefL)^2 + 1/3 * 0.13 * (h_flood - RefL)^3 ) * 10^6 + volume of water on the RefL
available_water = StorageVolume + ReleaseVolume
no_flood = (available_water <= volume_flood)

13. Water Elevation Changes Throughout time steps

14. Scenarios 1) Base Scenario 2) Second Scenario 3) Third Scenario
Increasing the minimum requirement flow in Adda River (downstream Como reservoir) from 5 m3/sec to 9,2 m3/sec.
Decreasing the minimum requirement flow in Ticino River (downstream Maggiore reservoir) from 13 m3/sec to 10 m3/sec.
3) Third Scenario
Reducing the minimum water level for available navigation by
Using proper size of boats and ferries.

15. RESULTS – Base Scenario
 Stakeholders
 Reliability (%) 
 Navigation 
 Como
 Low Level
100.00
 Flood Level
98.43
 Maggiore 
Low Level
99.80
83.00
 Environment
 Min Environmental Flow Adda
30,34
 Min Environmental Flow Ticino
 Regina Elena Hydropower Plant
53.60
 Irrigation
 Adda
66.96
 Industriale
94.60
 Regina Elena
55.05
 Villoresi
84.49

16. RESULTS – 2nd Scenario Stakeholders Reliability (%) Navigation Como
 Low Level
100.00
 Flood
98.44
 Maggiore 
 Maggiore Low Level
99.81
 Environment
 Min Environmental Flow Adda
99.78
 Min Environmental Flow Ticino
99.1
 Regina Elena Hydropower Plant
53.78
 Irrigation 
 Adda
67.17
 Industriale
94.81
 Regina Elena
55.18
 Villoresi
84.68

17. TRADE-OFF EVALUATION
DiscoveryDV (DecisionVis LLC, 2014)

18. TRADE-OFF EVALUATION 2nd scenario Base scenario
DiscoveryDV (DecisionVis LLC, 2014)
2nd scenario
Base scenario

19. RESULTS – 3rd Scenario
Shifting up the minimum level threshold for navigation in Maggiore Lake.
It is not a physical modification, it is a modification in application by using different size of boats by the stakeholder.
The reliability of navigation with respect to low level goes up to 100% from 83%. No effect on other stakeholders.

20. CONCLUSIONS
- 2nd scenario is the best alternative to apply, as we increase our reliability for Maggiore Lake and as well as the reliabilities of other stakeholders, apart from only 0.9% drop for Environment group in Ticini River.
- Another alternative might be using different type of boats according to level differences by the stakeholder in order to keep navigations.

21. Thanks for your attention
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