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[307 kb]	Utjecaj i veza kanalizacijskih sustava i uređaja za pročišćavanje otpadnih voda - suvremena iskustva s primjerom projekata optimalizacije kanalizacijskog sustava grada Zagreba Božidar Deduš, Vesna Rogulja Sažetak Tema članka je utjecaj kanalizacijskog sustava u svim aspektima - od planiranja i dimenzioniranja pa do rada i održavanja na dimenzioniranje i rad uređaja za pročišćavanje otpadnih voda (UPOV). U članku se želi ukazati na kompleksnost problematike i međusobnu povezanost učinaka rada kanalizacijskih sustava s učincima UP a koja se često zanemaruje. Na primjeru nedavno završenog Projekta Optimalizacije Kanalizacijskog Sustava Grada Zagreba (POKS GZ; PRONING DHI, Zagreb 1998.) prikazan je jedan aspekt poboljšanja učinaka rada budućeg uređaja, temeljem primjene sustavnih zahvata na kanalizacijskom sustavu i suvremenih inženjerskih alata.
[172 kb]	Neuralni model upravljanja kanalskim sustavima M.Sc. Božidar Deduš dip.ing. Dip. HE (Delft) Sažetak Ovim se radom analiziraju mogućnosti uvođenja nove tehnologije upravljanja gradskim kanalskim sustavima u Hrvatskoj. Obrađuje se također problem potrebe suvremenog pristupa projektiranju kao ključnom uslovu za primjenu racionalnih rješenja. Prezentira se i obrazlaže jednostavni model upravljanja kanalskim sustavom temeljen na neuralnim mrežama a koji može predstavljati prvi korak ka punom operativnom modelu upravljanja kanalskim sustavima u realnom vremenu.
[802 kb]	Application of a Novel Approach to Sewer System Analysis B. Deduš, M. Pavleković Sažetak "The Zagreb Sewerage System Optimization Project" (ZSSO), initiated at the end of 1994, has established new standards in urban drainage modeling within Croatia. Croatia, as a Central European country in transition, is in need of effective solutions for its ambitious wishes in the field of infrastructure projects. The World Bank and the European Bank for Reconstruction and Development participate in several sewerage and wastewater treatment projects. Due to growing concern about the water quality, local funds are being directed to the revision of existing sewerage master plans. Zagreb is a modern European city, the capital of Croatia and its biggest industrial center. The city has realized that any further investment in the sewer system or the WWTP without preceding research is unwise. At the beginning of 1995 the first phase of the ZSSO started, set out to collect all available data on the present state of the sewerage system, and to bring about tools for the creation of a Master Plan. Final goal of the project is to bring about a powerful engineering and decision making tool for real time control (RTC), on behalf of future investments such as an integral flood protection system, a reconstruction of the GOK (the main outlawing open channel), the construction of a WWTP, etc. Overall water quality, especially of the groundwater resources (the main drinking water source of the city of Zagreb) is a very important issue too.
[290 kb]	Use of Historical Rainfall Series for Hydrological Modeling Third International Workshop on Rainfall in Urban Areas Pontresina (Switzerland), 4-7 December 1997 M.Sc. Božidar Deduš Dip.HE(Delft) dipl.ing., Vesna Rogulja dipl.ing., Draženka Raguž dipl.ing Sažetak The Zagreb sewerage optimization project is today one of the most comprehensive projects concerning sewage systems, undertaken in Croatia so far. The core of the project is creation of the "Master plan", but project initiates series of real world processes. The aim is to change the way sewerage system of Zagreb is being treated, operated, maintained and designed. Economical validation of short terms remedial and long-term development measures are being validated against risk criteria. Project is in coordination with other infrastructures and/or environmental protection projects underway. The purpose of this paper is to discuss how the choice of means and ways of usage of rainfall data can influence the final result. Paper also explains the way, rainfall records and existing IDF curves were used in the project so far.