Designing Decision Support Systems for Flood Emergency in the Timis-Bega Basin L
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Buletinul Ştiinţific al Universităţii "POLITEHNICA" din Timişoara Seria HIDROTEHNICA TRANSACTIONS on HYDROTECHNICS Tom 55(69), Fascicola 2, 2010 Designing Decision Support Systems for Flood Emergency in the Timis-Bega Basin L. Bociort (1), G. Popa (2), A.Popescu(3) Abstract: To better monitor the progression of a major can be used to evaluate various flood mitigating flood and its likely impact on people andproperties, measures in order to determine which alternative will Romanian Water Boards are in need to build be economically and environmentally feasible given sophisticated Flood Emergency Decision Support the prevailing conditions. Systems (DSS). The aim of such a DSS is to integrate the Timis and Bega rivers of Banat region in hydrologic, hydraulic and GIS “flood intelligence” assessed over the last years ( for example 10 years) and Romania, are lately, more and more subject to floods, extract and present vital flood emergency decision showing the need of a Decision Support System for a making information during an actual event. flood forecasting system, a system which can support This paper outlines the DSS strategy and show how the operational water management under extreme DSS should extract and display all thevarious conditions when actions have to be taken quickly. components of information to various groups which are This paper presents the design of such a system for required to respond to a flood emergency. Examples are the mentioned catchement. Timis and Bega rivers provided of how the DSS interprets the basic hydraulic were considered jointly, since their hydrodynamic and hydrologic inputs and GIS data to provide flood responses are conditioned by operation of existing intelligence such as: Flood Affected Properties – overfloor flooding associated with a predicted flood hydraulic structures used for water transfer between level; Evacuation and Exit Routes – the predicted depth them. The main use of the system is for forecasting and relative timing along evacuation routes to and from rising and high river water levels. evacuation zones and nearest evacuation centers; and Romanian Waters (The National Agency Flood Damage – post flood spatial assessment of the responsible for overall water resources management) distribution of likely damage. follows the legislation compatible with the EU 1 INTRODUCTION regulations regarding water resources management 1.1 Background and the preservation of aquatic ecosystems and water Floods remain one of the most frequent and areas. In this respect, this agency is responsible for devastating natural hazards worldwide. While the ways in which the surface and ground water existing forecasting and warning systems can resources on the Romanian territory are used. significantly contribute to the reduction of losses, the In terms of flooding problems one of the most potential for further prevention of avoidable losses vulnerable regions in Romania is in the West. with the technological advances through system Furthermore, many rivers in this region are of trans- improvements remains considerable. boundary nature. Most of the rivers from the western Flood modeling can help to understand flood side of Romania are having their basins in either generation and identify the potential areas to be Romania and Serbia, or, Romania and Hungary. Any inundated, thus allowing for planning to reduce the event occurring on these rivers is advected damage caused by floods by giving early warning to downstream to the neighbouring country. A typical communities downstream, especially in floodplains example of this situation is the river Timis, which in which will be affected. At the same time, modeling recent past caused some severe flooding in the two 1Romanian Water National Administration, Banat Regional Water Branch, Timisoara, M. Viteazul Str.,E-mail: luci.bociort.dab.rowater.ro 2Faculty of Hydrotechnical Engineering Timisoara, CHIF Department, George Enescu Str. No. 1/A, 300022 Timisoara 32 neighbouring countries of Romania and Serbia. In the specify the discharge and water quality conditions past many dikes have been constructed along the downstream of the border. river for flood protection, which in return made the The river Bega starts at the junction downstream flood propagation quicker, causing headwaters of Bega Luncanilor and Bega Poieni. severe flood damages. After starting of to the north, the river bends to the west at Coşava, finally entering the low Banat plains. Since this is the area that was frequently flooded in 1.2 Basin description the past, the Bega canal was constructed with a length Timis Bega basin is located in south-west of of 114 km, parallel to and existing canal (Bega Veche Romania in Banat province, it lies between latitude – 97 km). These two canals are connected 44°30’ and 46°, and longitude 20°20’ and 22°40’.The downstream in Serbian territory. The Bega canal runs climate is temperate continental with influences from through the city of Timişoara and continues to the the Mediterranean basin and also under the south-west. It has a draining area of 2,878 km². Carpathian Mountains protection, east and north, which diminish the climate influence of Eastern The Timis River is 359 km long, rising in Europe The basin is depicted in Figure 1. Timis – the Semenic Mountains (southern Carpathian Bega hydrographical basin Mountains) Caraş-Severin County, Romania. It flows A c . C o s a r i i I I A c . A c C o s a r i i I R e p a s A c. Sec a s III Ohaba Lunga A c. Secas II A c . Bara Secas A c . H o d o s B res tovat Ac. Secas I I a n o v a Zorani G ia rmata A c . Margin a G ia r m a t a Faget A c . Bethausen Man ast iur R e c a s Ghizel a Pietroasa Dumbravita A c . Dum brava A c . Balin t Curte a Rec as D u m b r a v i t a S u s t r a A c . Remete a Mare A c. Topo lova t I o s i f a l a u Ghiroda TIM I{O A RA Topo lovatu M are Trai an Vuia A c . S u r d u c Tomesti N .H. UZINA HIDRO ELEC TRICA N.H. Belint TIM ISO ARA TO PO LO VAT Costei u Sinmihaiu Rom an Mo snita Noua M .H.C . Firdea Pold e r H itia s N . H . C O STEI SURDUC Giroc Birna N .H. DE BIEFA RE SI Racov ita NAVIG A T I E S I N M I H A I U R O M AN Boldur Ui var LUG O J Chever esu Mare Sag N .H. DE BIEFA RE SI N AV IG ATIE Saco su Turcesc A c . Buzias S a l c ia SINM A R T I N U M A G HIAR A c . P o l d e r P a d u r e n i Darov a Victor Vlad Delamarina Nadrag Peciu Nou S i l a g i u Criciov a Petroas a Mare Silagi u A c . H e r e n d e s t i Gavojdi a Li ebling Ni tchido rf Sacosu Mare A c . S t i u c a Giulvaz Jebel Stiuca Sac A c Tin cova C a d a r - D u b o z M .H.C . Rusc a Mont ana Izgar C - T I N D A I C O V IC IU Constantin Daicov iciu Ci acov a Torm ac Foeni Vermes Zavoi Otelu Rosu P o l d e r L a n c a B i r d a Ba utar Co pacele Marga Firliug Glimboc a Magura Grani ceri Obrej a Zorl entu Mare Palt in is Brebu Ezeri s A c . B i s t r a Turnu Ruieni P o i a n a M a r u l u i Buc hin Valea Timi sului i Bolvas n ta Buc osnit a Slat ina Timis Brebu Nou u A c . T i m i s - T r e i A p e Armenis Tereg ova through the Banat region and flows into the Danube The climate is characterised with northerly cold in northern Sera. The drainage area covers 13,085 winds in the winter and moderate westerly winds km² (in Romania 8,085 km², in Serbia 5,000 km²). coming from the Atlantic in the summer. At altitudes After entering Banat, the river becomes slow and higher than 1000 amsl, in the Banat Mountains, the meandering, causing floods in rainy years. Especially intersection of the two influencing zones generates devastating were the floods of 2005, when the heavy snowfalls. In January, which is the coldest villages Boka and Jaša Tomić, which are in Serbia, month average temperatures range from -4°C to 0° C. were badly damaged. During the summer, the highest temperatures recorded in the Danube Valley are 34°C, in July. In the Timis Bega catchment technical measures for relieving the lowlands of this area from recurring floods have already been initiated 250 years The main rivers in the Timis - Bega basin ago. Flood regulation has been achieved through the discharge water in Serbia beyond Romanian borders. regulation of several measures: correcting the path of Bilateral agreements between the two countries some water courses; dykes construction; several permanent and non-permanent reservoirs on the 33 watercourses or aside them (polders); drainage of In essence a DSS is a Windows application swamps; development of a drainage canals network, together with pumping stations. An important measure was the establishment of double connection between Timis and Bega Rivers, consisting of hydro technical joints and canals that allow gravitational flow diversion into one of the two rivers depending on the flow conditions.