Conference Agenda

As part of Stormwater Poland 2022, we have prepared

4 thematically mixed sessions, divided into 2 conference days and a WaterFolder Day

Wednesday, 28 September 2022

08:00 - 09:00
Speech and opening of the conference
Tomasz Grochowski - RetencjaPL
09:00 - 09:10
Official welcome of the participants and opening of the conference
Mariusz Skiba - V-President Katowice City
Krzysztof Dąbrowski - Izba Gospodarcza Wodociągi Polskie
Danuta Kamińska - GZM
09:10 - 09:40
Construction and operation of a rainwater drainage system in the city of Katowice
Anna Wilk - Katowickie Inwestycje S.A.
Mariusz Słaboń - Katowickie Inwestycje S.A.
09:40 - 09:55
Map of rainwater solutions in Silesia
Maciej Pawlak - Hauraton Polska
09:55 - 10:20
Archiclima's LIFE Project. We restore nature to cities.
Łukasz Łapiński - Investeko SA
10:20 - 10:35
Is it possible to perform retention in every place?
Adam Wojtala - Amiblu Poland
10:35 - 10:55
The project "Improvement of water and sewage management in the Zabrze Commune" - was it worth it?
Piotr Niemiec - Zabrzańskie Przedsiębiorstwo Wodociągów i Kanalizacji Sp. z o.o
10:55 - 11:10
Regulation of water relations on the premises of the Auschwitz-Birkenau State Museum in Oświęcim. Issues and activities.
11:10 - 11:25
Summary of the session, questions from participants
Prof. Elżbieta Nachlik - Cracow University of Technology
Prof. Marian Kwietniewski - Warsaw University of Technology
11:25 - 11:35

Session 1

Made in Silesia

Being aware of the unique local conditions, we plan to start our meeting with a session titled: Made in Silesia. In this part, we want to present specific projects regarding rainwater, increasing its retention and use on site in order to change the cities of Upper Silesia and Basin for a better future, and thus improve the standard of living of their inhabitants and make them resistant to progressive climate change. We want to show that such projects can be part of the overall transformation of the entire region and constitute a good role model in other parts of the country. In addition, this session is to demonstrate technologies and solutions in the field of rainwater that are created, produced or have their pioneering applications in this industrial heart of Poland. This session is also an opportunity to answer the question whether there are any measurable effects of the edition of the Stormwater Poland conference in Katowice in the previous year.

Coffee break
11:35 - 12:15
How to estimate combined sewer overflows in real-time at city-scale: Case Helsinki
Hannes Björninen - FLUIDIT
12:15 - 12:35
See raindrops as a resource, not a threat with the Wavin TreeTank system.
Wim Vandecauter - Wavin Belgium
12:35 - 12:55
How to keep up with the changing climate and intensification of weather events. Methods of adapting infrastructure from the perspective of MPWiK in the Capital City of Warsaw
Bartosz Zaborski - Miejskie Przedsiębiorstwo Wodociągów i Kanalizacji in the capital city of Warsaw S.A.
12:55 - 13:10
Hydrophyte storage reservoirs, i.e. nature supported by technology
Grzegorz Boguś - Ecol-Unicon
13:10 - 13:30
The issue of reducing discharges by storm overflows on the example of WMK S.A. projects in Krakow
Marcin Glixelli - Waterworks Kraków
13:30 - 13:45
Introduction of the new Central collector channel, Graz, Austria.
Thomas Grünig - HST Systemtechnik Gmbh & Co. KG
13:45 - 14:00

Session 2

Rainwater does not have to be a sewage!

In the second block of the conference, entitled: Rainwater does not have to be a sewage! we want to address the issue of the impact of the quality of rainwater or snowmelt runoff on the waters of receivers. At this session, we want to deal with the seemingly unsolvable problem of combined sewage systems. We want the users to speak at the session, those, who did not escape this challenge, but were able to separate the combined sewage system even in the scale of a large city, obtained permits for the CSO operation in accordance with the current requirements of the Water Law or applied solutions limiting the number of overflows and their impact on water receivers. We would like to supplement these examples with the presentation of technical solutions that may help in increasing the retention capacity of combined sewage systems and reducing the number of overflows as well as reducing the overall load of pollutants discharged with rainwater and meltwater.

14:00 - 15:00
Rainwater and snowmelt in the combined sewage system of the city of Tarnów - model studies and their application in planning future sewerage investments in the city.
Ph.D. Tadeusz Rzepecki - Tarnów Waterworks
15:00 - 15:15
The Emscher-Conversion: a holistic approach to wasterwater and rainwater management. 
Ph.D. Stephan Treuke - Emschergenossenschaft und Lippeverband
15:15 - 15:35
Construction of storage reservoirs in Wrocław as an element of the Rainwater Management
Wojciech Stanek - MPWiK S.A. Wroclaw
15:35 - 15:50
Construction and reconstruction of the main rain collectors in the city of Mrągowo
Cezary Klimczuk - Zakład Wodociągów i Kanalizacji Sp. z o.o.
15:50 - 16:05
Summary of the session, questions from participants
Prof. Ewa Burszta-Adamiak - Wroclaw University of Environmental and Life Sciences
Prof. Agnieszka Brzezińska - Lodz University of Technology
16:05 - 16:15
Summary of the day
Ph.D. Renata Woźniak-Vecchie - RetencjaPL
16:15 - 16:25

Session 2 cont.

Gala dinner in International Congress Centre
20:00 - 01:00

Construction and operation of a rainwater drainage system in the city of Katowice

Construction and operation of a rainwater drainage system in the city of Katowice Due to the constantly progressing urban processes in urban areas, the possibilities of rainwater infiltration into the ground and groundwater and surface water supply are being gradually limited. At the same time, the possibilities of natural water retention decrease, which causes more and more frequent flooding of urban areas. Hence, the management of rainwater has recently become one of the city's key challenges. Investments in adapting the city to climate change, which the Company has been carrying out since 2017 under OPI & E 2014-2020 Priority axis II, unlike the construction and separation of the sewage system in Katowice implemented so far and minimizing the inflow of rainwater to the treatment plant, are very clearly focused on water retention rainfall through the construction of underground storage reservoirs, adaptation of the existing infrastructure to storage reservoirs and the use of natural terrain for retention, delaying the outflow of water to the reservoir and ensuring the possibility of using the retained water for municipal purposes. In the years 2020-2021, the Company implemented a monitoring system for the functioning of the sewage system in the city of Katowice. Analyzes of the collected measurement data of the current state of operation of the rainwater sewage system in relation to the measurements from rain gauges allowed to identify the existing problems related to the functioning of the rainwater sewage system. Thanks to a total of 156 flow measurement devices installed on the network and the level of filling in the canal, collectors have been selected, which the Company plans to use in the coming years as rainwater retention reservoirs to protect urban areas from flooding. Moreover, based on the obtained measurement data, places where it will be necessary to design and build new retention reservoirs have been pre-selected. The monitoring system of the sewage network operation is successively supplemented with the measurement of the filling of the intake wells built at the retention reservoirs in order to enable the use of retained water for municipal purposes by municipal services. In the near future, work will begin on measuring the filling of rainwater retention reservoirs, which will be the next step in the expansion of the rainwater sewage system management system.

Map of rainwater solutions in Silesia

The area of ​​the agglomeration is a variety of spaces in which the issue of rainwater management is associated with the need to apply advanced and thoughtful solutions. In this year's edition of the conference, we will present examples of investments in which the use of drainage, pretreatment and drainage systems ensured the safety of use of the facility with care for the natural environment. We will discuss the most interesting investments in the areas of: infrastructure, logistic centers, industry, public space and sports facilities

Archiclima's LIFE Project. We restore nature to cities.

There are nearly six hundred shopping malls in Poland with an area of over 5,000 sq m. m2 and nearly 6,000 discount food stores with over 100 parking spaces for cars. With 12 m2 per car, a large roof area and in conjunction with internal roads, we usually deal with an area of about one and a half hectares of concrete and asphalt per such object. These spaces are abiotic deserts in the fabric of cities, sites of ascending dry hot air currents, centers of local floods and inundations, and perceived heat islands. The aforementioned phenomena reduce the quality of functioning in the vicinity of these places. At the same time, shopping malls are places where people's activity is massively concentrated. According to PRCH, the monthly Footfall index in Polish shopping centers before the pandemic reached 170 million. Each resident of Poland visits a shopping center on average 4-5 times a month. In the era of climate change, large commercial facilities are looking for solutions to new challenges. Hydrological, biocenotic and social problems, damage and failures of infrastructure have negative financial consequences. After the lifting of covid restrictions, traffic returned to shopping centers. However, this is not enough for large galleries to survive in the face of increasing competition from online commerce. According to the latest PRCH and Gfk report "The future of shopping centers", it is necessary to introduce deep changes in galleries. Nature is the solution. Meet the Archiclima LIFE project.

Is it possible to perform retention in every place?

Water can be a problem in excess or scarcity, if we manage it inappropriately, we may be at risk of flooding or drought. We can retain rainwater by delaying its runoff or draining into the ground, we can recover water from wastewater after treatment processes, we can do a lot for future generations. Amiblu is actively involved in all these processes. Amiblu products can be used to transport and store drinking water, to retain rainwater or to transport polluted wastewater to treatment plants. During my presentation, I will show the material possibilities of Amiblu GRP pipes, how these products can be easily used in extremely difficult and inaccessible conditions, what design solutions can be created from them, and finally I will answer the question "why is it worth using GRP".

How to estimate combined sewer overflows in real-time at city-scale: Case Helsinki

This presentation explores a city-scale combined sewer model developed for the Helsinki Region Environmental Services Authority (HSY). HSY has a unique demand for advanced modeling as they rely on simulations to report the quantity and quality of Combined Sewer Overflows (CSO) from the network into the Baltic Sea. In 2022, the model built on the Fluidit Storm platform will develop even further to enable real-time CSO reporting anywhere in the system in all seasons. HSY is a joint municipal assembly providing waste management and water services for 1.2 million people in the Helsinki metropolitan area and operates the largest WWTPs in Nordic countries.

See raindrops as a resource, not a threat with the Wavin TreeTank system.

The climate is changing and we cannot avoid it. As a result, we will have longer drier periods followed by heavy rainfall. In addition, by 2050, two-thirds of the world's population will live in cities. By then, cities will be 2 degrees warmer and experience more heat waves. Trees are a naturally based solution to make our cities more sustainable, resilient and liveable. During heat waves, trees provide cooling through their shade and evaporation. This requires water for the tree to grow and evaporate moisture. With our solution for trees in the city, we combine the perfect environment for a tree to grow and water it when needed. In short, we use rainwater as a source to cool the city.

Hydrophyte storage reservoirs, i.e. nature supported by technology

Retention reservoirs with a wetland pre-treatment plant can be an excellent solution for use in cities, being an alternative to other technologies and methods of rainwater retention. Its great advantage is the ability to collect and use pre-treated rainwater, e.g. for municipal purposes, using the natural method of pre-treatment that uses aquatic plants, i.e. hydrophytes. The hydrophyte pre-treatment plant, which is located above the retention reservoir, guarantees high efficiency in removing mineral and organic pollutants from rainwater. During the presentation, a project for the application of the wetland retention reservoir technology in Park Liściasta, implemented as part of the "Zielona Łódź" project with the support of EU funds, will be presented. The use of a natural wetland method in conjunction with supporting engineering technology and prefabrication of reservoir elements will allow for the least possible interference in the current environmental situation of the park, quick assembly and short drainage time, guaranteeing the safety of residents. An undoubted advantage will be the possibility of using retained water for municipal needs. The technology of retention reservoirs with a hydrophyte pre-treatment plant is a perfect combination of nature and technology, which can also be an interesting recreational form for residents.

The issue of reducing discharges by storm overflows on the example of WMK S.A. projects in Krakow

Three projects to reduce discharges from storm overflows will be discussed: pre-treatment system on the "Żaglowa" weir, construction of PFZ reservoirs with automation at the Wilga river, and retention system on the left bank of the Vistula along with the modernization of the upper head of the Wisła siphon

Introduction of the new Central collector channel, Graz, Austria.

In early 2020 the central collector channel (ZSK) along- and under the river Mur in Graz, Austria has been completed. The ZSK collects sewage and rain water, so called “combined sewage” from the drainage network of Graz city area and transports it to the central WWTP for treatment. The new collector channel increases significantly the storage volumes of stormwater and hence decreases the risk of urban flooding in the City area and reduces the quantity of CSO events after heavy rain falls. In order to control and manage the operation, the collector channel has been equipped with state of the art technical equipment like the newest generation of hydraulic lifting weirs and control- and monitoring software. The presentation introduces the design, construction and operating philosophy of the ZSK and its contribution to a more resilient drainage infrastructure against the impacts of the climate change.

The Emscher-Conversion: a holistic approach to wasterwater and rainwater management. 

Since 1992, 328 kilometres of the Emscher and its tributaries have been reshaped to create a vibrant watercourse that closely reflects its original natural state. The Emscher has been free of all wastewater discharge since the end of 2021.

This means that a bold vision has now become reality. With the new urban planning and ecological river restoration throughout the Emscher region, the “new Emscher Valley” can be experienced in full by the local population. Today, the Emscher River shapes the entire region as it flows from its source in Holzwickede until it joins the Rhine in Dinslaken and, in the near future, in Voerde.

The now clean Emscher and its tributary streams pass through more than 40 urban areas that have benefited from state urban development grants. These renaturalised stream and river courses have been integrated into the urban design of the residential environment and have improved the quality of life for everyone who resides there.

The overriding goal of the Emscher River reclamation project is to separate two elements that do not belong together. Clean groundwater, spring water and rainwater now flow through the ecologically restored Emscher, while untreated sewage is channelled separately through underground ducts to wastewater treatment plants. At the same time, this massive water management project – built at a cost of over 5.5 billion euros – marks the transformation of an entire region that vastly improves the quality of life in the communities on both sides of the Emscher River and has a positive impact on urban and open space development.

The main artery of the new discharge system is the Emscher sewage canal between the Dortmund-Deusen and Emscher-Mündung wastewater treatment plants in the Dinslaken-Oberhausen-Duisburg conurbation. Extending over a length of 51 kilo metres, the canal accommodates the wastewater of some 2.26 million inhabitants along with extensive quantities of industrial and commercial discharge and channels it to the Bottrop and the Emscher-Mündung treatment plants.

Today, 430 of the 439 kilometres of sewage canals have already been relocated underground. This means that the surface streams are virtually free of wastewater and, freed from their concrete beds, can be returned to their natural state. The changes that we can expect in the New Emscher Valley are reflected in the nearly 150 kilometres of waterways that have already been ecologically restored and are gradually being transformed into new vital arteries for people, fauna and flora.

Construction of storage reservoirs in Wrocław as an element of the Rainwater Management

Construction and reconstruction of the main rain collectors in the city of Mrągowo

The presentation will discuss in detail the process related to the change in the material scope of the project entitled "Construction and reconstruction of the main rain collectors in the city of Mrągowo". The optimization of the project and the related challenges were all the greater as the city implemented investments with co-financing from the National Fund. The determination with which the actions were taken, the involvement of expert teams in the process and the use of modern design tools allowed, however, to introduce both ecologically and economically beneficial changes to the project. The new proposed rainwater management system is focused on the use of rainwater in situ, increasing retention and infiltration, restoring the natural water cycle in the catchment area and protecting the existing water reservoirs.

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