WuhanUniversityofTechnologyDepartmentofSpatial InformationandPlanningSchoolofResourcesandEnvironment EngineeringIndicators for estimating the sub-catchments' contribution tomaximum flow during flood events in the Jiu River BasinGabrielaAdinaMOROSANU-MITOSERIUInstituteofGeographyof theRomanianAcademy,Romaniagabriela.adina.m@gmail.com
Indicators for estimating the sub-catchments’ contribution to maximum flow during flood events in the Jiu River Basin 1 Wuhan University of Technology Department of Spatial Information and Planning School of Resources and Environment Engineering Gabriela Adina MOROȘANU-MITOȘERIU Institute of Geography of the Romanian Academy, Romania gabriela.adina.m@gmail.com
OutlineContextObjectiveStudy areaDataMethodology·DischargeThreshold calculationSelectionofthefloodsDevelopmentoftheindicatorsResultsConclusions
Outline Context Objective Study area Data Methodology • Discharge Threshold calculation • Selection of the floods Development of the indicators Results Conclusions 2
ContextThefloodvolumeonthemainriverissuppliedbythevolumescoming,inan unevenand unpredictable way,from thetributaries.Inahydrographicbasin,the sourceareas andthepropagationpathsofflood volumes varyseasonallyand alsoaccordingto exceptional events.Sub-catchments with high discharge rates are not always the keycontributorstofloodriskonthemainriverfurtherdownstream.Althoughthe spatial distribution of precipitationis a keyfactor in theformationof flood waves,theways inwhichfloodvolume isdelivereddoes notalwaysfollowthe rainfall behaviour.Flood events not only mobilize large volumes of water, but also sediments and theyare,thus,responsibleforbuilding alluvial riverbanks.OBJECTIVETo develop an indicator-based methodology allowing to identify the contributions of the mainsub-catchments during the flood events, by usingthe average dailyflow
3 Context OBJECTIVE To develop an indicator-based methodology allowing to identify the contributions of the main sub-catchments during the flood events, by using the average daily flow. The flood volume on the main river is supplied by the volumes coming, in an uneven and unpredictable way, from the tributaries. In a hydrographic basin, the source areas and the propagation paths of flood volumes vary seasonally and also according to exceptional events. Sub-catchments with high discharge rates are not always the key contributors to flood risk on the main river further downstream. Although the spatial distribution of precipitation is a key factor in the formation of flood waves, the ways in which flood volume is delivered does not always follow the rainfall behaviour. Flood events not only mobilize large volumes of water, but also sediments and they are, thus, responsible for building alluvial riverbanks
Study area23°0'0'E24°0'0′'EUraingJiuRiverBasinHungarRep.otJiuRiverBasinloidovagul MareMaxPian2519mVadeni-Ta.JiSaReservoirsAhinudes(mDanceMac2544Bulcaria050100200KmMnOJiu RiverBasin:Legend. SWRomania,Danubetributary,5 Ju River BasinCarpathianwatershedRiversArea~10,080km2,Lu~331kmAverageMain tributary watershedsrivernetworkdensity~0,39km-km-2Amaradia-Main rivers:Jiu,Eastern Jiu,Motru(F=Amaradia PietroasaArgetoaia1895 km2), Gilort (1358km2),Amaradia,LegendCioianaTismanaGilort2MainRivers Qavg.Ju E (3,24 m'-s-1 - Campu ui Neag g.s.;JiltJiu Estla 95 m-s-1-Zaval g.s.) and Qmax.Ju = 2000Elevations (m)JiuOuestm3.s-1Podarig.s.High:2519Motru-Different centers of origin of floods withinRaznictheriver basin dueto the different hydro-Low:23Susita0TismanaandmeteorologicalmorphometricIKm051020Kmcharacteristics of the sub-basins.23*0/0°E2400°E
4 Study area Jiu River Basin: SW Romania, Danube tributary, Carpathian watershed Area ~10,080 km2 , LJiu ~ 331 km Average river network density ~ 0,39 km∙km-2 Main rivers: Jiu, Eastern Jiu, Motru (F = 1895 km2 ), Gilort (1358 km2 ), Amaradia, Tismana Qavg. Jiu ∈ (3,24 m³∙s-1 - Câmpu ui Neag g.s.; la 95 m³∙s-1 – Zăval g.s.) and Qmax. Jiu = 2000 m³∙s-1 – Podari g.s. Different centers of origin of floods within the river basin due to the different hydrometeorological and morphometric characteristics of the sub-basins. Jiu River Basin
DataGeneralcharacteristicsoftheselectedriversandtheirwatershedsCatchmentAverageSide of the JiuGaugingAverage annualMaximum dailyAnalysisRiverRiverlevelstationdischarge (m's-)discharge (m’s-1)area (km2)elevation (m)RNiRaznic0,93475201Breasta134,4RNiArgetoaiaScaiesti0.3556,6249,7227,67LNi2,15859273AmaradiaAlbesti293,3RN,12,781700384MotruFata Motrului917,6RN2JiltTurceni1,180,3376540LN2590Gilort10,2377,31027TurbureaRN29.19314387TismanaCalnic356,82RN2Bistrita4,23135270540TelestiR154N2Runcu3,06111,2851StolojaniRN2Susita2,1779Vaidei43,81055L460N3Livezeni7,73104,21256JiudeI'EstRN35021134Jiudel'OuestIscroni10,29340,5Jiu9253446NiPodari84,571940,4DownstreamJiuFiliasi63,651434,55239563Up/DowntsreamN, / N,JiuSadu20,26246,712551066Up/DowntsreamN, / N3:DailyDischargedata:ABAJIU5.Precipitationdata:ROCADAGriddedDataset(extractionofupstreamdailyrainfallvaluesforeachg.s.)
5 River Gauging station Average annual discharge (m3 s -1 ) Maximum daily discharge (m3 s -1 ) Catchment area (km2 ) Average elevation (m) Side of the Jiu River Analysis level Raznic Breasta 0,93 134,4 475 201 R N1 Argetoaia Scăiești 0.35 56,6 249,7 227,67 R N1 Amaradia Albești 2,15 293,3 859 273 L N1 Motru Fața Motrului 12,78 917,6 1700 384 R N1 Jilț Turceni 1,1 80,3 376 540 R N2 Gilort Turburea 10,2 377,3 1027 590 L N2 Tismana Câlnic 9.19 314 387 356,82 R N2 Bistrița Telești 4,23 135 270 540 R N2 Runcu Stolojani 3,06 111,2 154 851 R N2 Șușița Vaidei 2,17 43,8 79 1055 R N2 Jiu de l’Est Livezeni 7,73 104,2 460 1256 L N3 Jiu de l’Ouest Iscroni 10,29 340,5 502 1134 R N3 Jiu Podari 84,57 1940,4 9253 446 Downstream N1 Jiu Filiaşi 63,65 1434,5 5239 563 Up /Downtsream N1 / N2 Jiu Sadu 20,26 246,7 1255 1066 Up /Downtsream N2 / N3 Data General characteristics of the selected rivers and their watersheds • Daily Discharge data: ABA JIU • Precipitation data: ROCADA Gridded Dataset (extraction of upstream daily rainfall values for each g.s.)