Naslov
Monitoring and analyses for the working group II (WG2) in Rijeka area in Croatian-Japanese project

Autori
Ožanić, Nevenka ; Sušanj, Ivana ; Ružić, Igor ; Žic, Elvis ; Dragičević, Nevena

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
2nd PROJECT WORKSHOP, MONITORING AND ANALYSES FOR DISASTER MITIGATION OF LANDSLIDES, DEBRIS FLOW AND FLOODS, BOOK OF PROCEEDINGS / Ožanić, Nevenka ; Arbanas, Željko ; Mihalić, Snježana ; Marui, Hideaki ; Dragičević, Nevena - Rijeka : Sveučilište u Rijeci, 2012, 86-90

ISBN
978-953-6953-30-1

Skup
MONITORING AND ANALYSES FOR DISASTER MITIGATION OF LANDSLIDES, DEBRIS FLOW AND FLOODS

Mjesto i datum
Rijeka, Hrvatska, 15.12.2011. - 17.12.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Rječina catchment area; Dubračina catchment area; Mošćenička Draga catchment area; flood waters; debris flow; early warning system

Sažetak
Planed hydrotechnical research locations in Croatian-Japanese project - Risk identification and land-use planning for disaster mitigation of landslides and floods in Croatia in Rijeka area are Rjecina river catchment area (Grohovo), Dubracina river catchment area (Salt creek catchment area), and catchment area of Mošcenicka Draga near Opatija (Fig.1). At the Working Group II (WG2), activities are conducted by systematic observations of meteorological and hydrological parameters in the planed catchment areas and river basin (rivers, flash floods and torrential areas) in real time, numerical and hydrological analysis of the measured parameters, and preparing simulation models of floods, mud flows and flow to the areas analyzed for the purpose of making an early warning system for these phenomena, all adapted to the hydrological and geological conditions in Croatia. The chosen three pilot areas are different in hydrological and geological characteristics, but partly also by the possible consequences: Rjecina river catchment area - downstream profile near landslide Grohovo, catchment area of Dubracina river and Mošcenicka Draga near Opatija. Flood waters from these pilot areas can significantly affect the development of the area in which they are located. In fact, the flood waters of the Rjecina river, Dubracina river and debris flow of Mošcenicka Draga can cause (and in history they are) significant damage to downstream urban areas (Rijeka, Crikvenica and Mošcenicka Draga), and pose a high risk of possible future occurrence. Hydro analysis on these pilot areas of research will be conducted based on the results of an integrated monitoring system in real time. The establishment of early warning system will enable the safe operation of existing urban areas and their further development. In the part of the research within the Working Group II on flash floods and debris flow (WG2), there was established a permanent measure water levels at two hydrological profiles on Salt creek and Dubracina spring, with minute frequency measurements of water levels. Atmospheric pressure is compensated by the data collected device - Baro Diver. Rainfalls are measured by OTT-pluvio. Mošcenicka Draga catchment area is about 11 km2 and extends from elevation 0 to 1300 ma.s.l. with a mean altitude of 563 m.a.s.l. The basin is characterized by a large slope, resulting in significant surface runoff during intense rainfall and erosion processes in the basin. During the 1999, Croatian waters designed and performed the regulation of the torrent upstream of the road Rijeka - Zagreb to keep the stream sediment. Because of construction of hotel Mediteran, estuary of stream was paved and too low and there is a matter of time when will happen more significant flood the settlement Mošcenicka Draga. One of the purposes of this section of the survey is to assess the dangers of flooding of Mošcenicka Draga and the development of a conceptual model of flood protection with possible propagation and accumulation of sediment, and the impact of the construction of hydro construction on sandy beach. The goal of the Project is to investigate the mechanisms of stream sediment deposition, the conditions of its deposition in the water bed or on the beach and sea activities on his motion. The intention is to calculate the trend of extreme sea levels and predict their values for a specific return period. Based on measurements of the heavy rainfall and hydrological parameters we plan to calculate the maximum flood flow of torrent Mošcenicka Draga on several hydrological profiles. In the next phase of the Project we plan to set few more meteorological, precipitation and hydrological stations on all tree research areas, depending on needs.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Građevinarstvo

POVEZANOST RADA