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WP2 – INTEGRATED CATCHMENT SIMULATOR SYSTEM ICSS FOR A RIVER TEST SITE

ITALIAN MINISTRY OF FOREIGN AFFAIRS. ITALIAN MINISTRY FOR THE ENVIRONMENT AND TERRITORY. ADRICOSM. IOC-UNESCO. ADRICOSM-EXT PROJECT (ADRIatic sea integrated COastal areaS and river basin Management system pilot project - EXTension).

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WP2 – INTEGRATED CATCHMENT SIMULATOR SYSTEM ICSS FOR A RIVER TEST SITE

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  1. ITALIAN MINISTRY OF FOREIGN AFFAIRS ITALIAN MINISTRY FOR THE ENVIRONMENT AND TERRITORY ADRICOSM IOC-UNESCO ADRICOSM-EXT PROJECT(ADRIatic sea integrated COastal areaS and river basin Management system pilot project - EXTension) WP2 – INTEGRATED CATCHMENT SIMULATOR SYSTEM ICSS FOR A RIVER TEST SITE ING. ALESSANDRO BETTIN

  2. WP2: INTEGRATED CATCHMENT SIMULATOR SYSTEM FOR A RIVER TEST SITE • Task 2.1 - Definition of pilot area and mobilization • Task 2.2 - Data Collection and Database Implementation • Task 2.3 - Models set-up and implementation

  3. Task 2.1 Definition of pilot area – River Ishem • historical flow • Average = 18,10 m3/s • Maximum = 1200 m3/s • Minimum = 1,6 m3/s

  4. The City of Tirana • Population estimated is 500.000 (1.000.000 considering surrounding Villages) • Average altitude is 90 meters above sea level, annual rainfall is 1200 mm • Combined sewer system with many overflows into the River Lana and into the River Tirana • Foul water is discharged without treatment

  5. Tirana and surrounding rivers Tiranes Lana

  6. Pollutants (COD) Flow River Lana and sewer discharge CSO – Combined Sewer Overflow

  7. Task 2.2 Data Collection – River ISHEM • Basic characteristics of the ISHEM River basin • Flow records from permanent stations • River cross sections • Detailed maps of the river area 1:25.000 • Population • Water quality parameters from historical measurements

  8. Task 2.2 Data Collection – Tirana Sewer System • Network maps and drawings • Digitalized drawings of the sewer system • Longitudinal profile of main collectors • Network schematization • Watershed design • Design rain events (5 Years Return Period – 60’) • Population

  9. MOUSE DHI – MAIN FEATURES MOUSE is a professional engineering software tool for the simulation of hydrology, hydraulics, water quality and sediment transport in urban drainage and sewer systems • MOUSE RUNOFF: surface runoff models for urban catchment applications • MOUSE HD: hydrodynamic network model with RTC capabilities • MOUSE TRAP: pollutants processes affecting catchments surfaces and drainage networks (Advection/Dispersion)

  10. MOUSE sewer model - HD module • Population: 514,000 • Area: 1,234 has. • 264 nodes • 280 links • 106 catchments • 5 outlets: 4 discharging to Tiranes river and 1 discharging to Lana river • 14 CSOs to Lana River (Total discharge in LANAOUT) • No WWTP exists in Tirana.

  11. MOUSE sewer model – Hydrodinamic Simulations • Simulations were conducted for two conditions: • Dry Weather Flow • Wet Weather Flow, design rainfall (TR = 5yrs, 1 hour duration) • Design Event • TR = 5y, 60 minutes duration • Total Discharge = 137.000 m3 • Total COD = 164.000 Kg • Total SS = 8.500 Kg

  12. MOUSE sewer model – Water Quality module COD concentrations at main outlets in DWF condition

  13. MIKE11 DHI – MAIN FEATURES The software MIKE 11 (DHI) allows to simulate: • open channel flow and floods in surface waters (rivers, streams, channels, etc.) • unsteady flow conditions and dynamics of water quality (BOD, NH4, DO) along the modelled river • solid transport and fluvial morphology (erosion - sedimentation) • “Dam break” effect scenarios and flood events forecast in real time

  14. MIKE11 river model – HD module The river model has two secondary branches, the TIRANES river (22 km)and the LANA River (23 km), and one main river, the ISHEM, with a length of 35 km.

  15. MOUSE-MIKE11 Integration • The OUTLETS and CSOs modelled in MOUSE were considered as point sources of pollution to the river (boundary conditions) • MOUSE results (COD, NH4 and TSS) were imported into MIKE 11

  16. 75 mg/l RIVER TIRANA Lana Inlet 130 mg/l RIVER LANA Results: Water Quality in the river in Wet Weather

  17. 12 mg/l RIVER TIRANA Lana Inlet RIVER LANA 60 mg/l Results: Water Quality in the river in Dry Weather

  18. Conclusions • Tirana sewer system discharges a big amount of polluters in the surrounding receiving waters both in dry weather and in wet weather. • The total flow discharged in wet weather during 4 hours (5Y 60’) is comparable with the total foul water produced during 24 hours in dry weather (500.000 eq.inh.). • River Lana is the most critical branch due to the low flow and the high discharge. • Improvements will be achieved with the following works: • building of the waste water treatment plant • restructuring and control of combine sewer overflows • Implementation of a continuous monitoring system of flow, rain and water quality

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