WuhanUniversityofTechnologyDepartmentofSpatialInformationandPlanningSchoolof ResourcesandEnvironment EngineeringMultiscale Analysisof Suspended Sediment Dischargein the Jiu River BasinGabrielaAdinaMOROSANU-MITOSERIUInstituteofGeographyoftheRomanianAcademy,Romaniagabriela.adina.m@gmail.com
1 Multiscale Analysis of Suspended Sediment Discharge 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
KeyaspectsAccountingforfinesedimentsourcesincomplexriverbasinsRemotevs.closetosinkalluvialsourcesExtensivevolumes of materialsarereleasedduringhighwaterandfloodperiodsFlowvariabilityplays an essential role inmobilizingandtransporting sediments duringfloodsNeedforproxymethodstounderstandtheprocessescontrollingthefinesedimentdynamicsWater-SuspendedsedimentrelationshipWhichroledothefloodsplayinmobilizingsuspendedsediments?Which time scales are more appropriate to investigate the suspended sedimentvariability?AIRANDWATER COMPONENTS OFTHEENVIRONMENT INTERNATIONALCONFERENCE
AIR AND WATER COMPONENTS OF THE ENVIRONMENT INTERNATIONAL CONFERENCE 2 Which role do the floods play in mobilizing suspended sediments? Which time scales are more appropriate to investigate the suspended sediment variability? Accounting for fine sediment sources in complex river basins Key aspects Flow variability plays an essential role in mobilizing and transporting sediments during floods Need for proxy methods to understand the processes controlling the fine sediment dynamics Water – Suspended sediment relationship Remote vs. close to sink alluvial sources Extensive volumes of materials are released during high water and flood periods
HypothesisAlluvial sources, suspended sediment transfer pathways and floodcan be captured byanalysingthepropagationtimeandthehysteretic behaviorof liquid and solid discharge.Investigating the variability in sediment delivery and storage along river courses, as a substitutemeans for more complex and data - sensitive methodological approaches, for apportioning theObjectivedominant sourcesof sedimentsmobilized duringfloods,inthe2001-2010period.Study areaJiuRiverBasin (JRB):UkraineSWRomaniaHungarRep.otDanubeCarpathiantributary,Moldovawatershed-Area~10,080km2Complexnatural(geomorphologyandgeomorphicfactors)&anthropogenic(coal mining)sedimentyielddriversNatural&AnthropogenicsedimentLegendMain RiversSerblasources (coal bearings)Alirudes(mElevations (m)SneMuC254High:2519Bulgari200Km050100Low : 23051020KmAIRANDWATERCOMPONENTSOFTHEENVIRONMENTINTERNATIONALCONFERENCE
Alluvial sources, suspended sediment transfer pathways and flood can be captured by analysing the propagation time and the hysteretic behavior of liquid and solid discharge. Objective Study area Jiu River Basin (JRB): SW Romania Danube tributary, Carpathian watershed Area ~10,080 km2 Complex natural (geomorphology and geomorphic factors) & anthropogenic (coal mining) sediment yield drivers Natural & Anthropogenic sediment sources (coal bearings) Hypothesis 3 Investigating the variability in sediment delivery and storage along river courses, as a substitute means for more complex and data – sensitive methodological approaches, for apportioning the dominant sources of sediments mobilized during floods, in the 2001 - 2010 period. AIR AND WATER COMPONENTS OF THE ENVIRONMENT INTERNATIONAL CONFERENCE
Methodology1.Data used23°0'0'E24*0'0*EThe liquid discharge (Q)series(mean daily water discharge)&Legendsuspendedsedimentdischarge(R).JiuRiverBasinRiversDaily,monthly,annuallytimestep(Q&R);hourlydischarge(Q)Gauging station1...22Hydrological,Period:2001-2010order→22gaugingstations12Based on the suspended sediment discharge, which we furtherdeterminedseveral parameters,suchas:.the average and maximum multiannual suspended sediments16discharge (Ravg and Rmax, in kg's-l);:the average suspended sediment concentration (SSC, in kg'm-3);.the annual volume of suspended sediments (W, millions oftonnes):theaveragespecificsoliddischarge(r,int-ha-l-an-1)→>SSC[g.m-3]=R[kg·s-] /Q[m3-s-]·1000JiuRiverBasinmapand the studiedgaugingstations(g.s.),numberedbyhydrologicalorder051020KmAIRANDWATERCOMPONENTSOFTHEENVIRONMENTINTERNATIONALCONFERENCE3m0*4900
4 Methodology The liquid discharge (Q) series (mean daily water discharge) & suspended sediment discharge (R). Daily, monthly, annually time step (Q & R); hourly discharge (Q) Period: 2001 – 2010 22 gauging stations Based on the suspended sediment discharge, which we further determined several parameters, such as: • the average and maximum multiannual suspended sediments discharge (Ravg and Rmax, in kg∙s -1 ); • the average suspended sediment concentration (SSC, in kg∙m-3 ); • the annual volume of suspended sediments (W, millions of tonnes); • the average specific solid discharge (r, in t∙ha-1 ∙an-1 ) SSC[g∙m-3 ] = Ṝ [kg∙s -1 ] / Q̄ [m3 ∙s -1 ] ∙1000 1. Data used Jiu River Basin map and the studied gauging stations (g.s.), numbered by hydrological order AIR AND WATER COMPONENTS OF THE ENVIRONMENT INTERNATIONAL CONFERENCE
CatchmentQavgRavgHydrologicalUpstream2. MethodsareaRiverGauging stationorderalt. (m)(km2)(ms-l)(kg*sl)11593.4413460.16Campu lui Neagm12632896.91Barbafeni0.284Iscroni113450211.183.72Gauging stations andupstream7Sadu1066125524.427.66catchments consideredfortheJiu10697772350.3913.22Rovinaristudy(2001-2010)14563Filiasi523970.9816.8319Racari508721789.27Thestationsareorganized inupstream-44.41214469253Podari97.9973.56downstream order, river-wise.22Zaval41710,070105.48108.61225Valea de Pesti13001.190.04Valea de Pesti5135Taia1476Lonea Taia1.390.35682612060.32LoneaEastern Jiu2.01Note:861538CeleiOrlea0.081.86Qavg average liquid dischargeebetween95482704.59TelestiBistrita5.512001and201011JiltTurceni5403761.120.45Ravg = averagesolid discharge between127496309.674.94Targu CarbunestiGilort2001and201013590Turburea102712.2914.63155266467.94Brosteni6.73Motru1838413.25Fata Motrului170010.18164824202.95CorcovaCosustea2.5717Strehaia2573120.78Husnita0.31310370.08BustuchinAmaradia0.29AIRANDWATERCOMPONENTSOFTHEENVIRONMENTINTERNATIONALCORFERENCE5
Hydrological order Gauging station River Upstream alt. (m) Catchment area Qavg Ravg (km2 ) (m³∙s-1 ) (kg∙s-1 ) 1 Câmpu lui Neag Jiu 1346 159 3.44 0.16 3 Bărbăţeni 1263 289 6.91 0.28 4 Iscroni 1134 502 11.18 3.72 7 Sadu 1066 1255 24.42 7.66 10 Rovinari 697 7723 50.39 13.22 14 Filiasi 563 5239 70.98 16.83 19 Răcari 508 7217 89.27 44.41 21 Podari 446 9253 97.99 73.56 22 Zăval 417 10,070 105.48 108.61 2 Valea de Peşti Valea de Peşti 1300 25 1.19 0.04 5 Lonea Taia Taia 1476 135 1.39 0.35 6 Lonea Eastern Jiu 1206 826 2.01 0.32 8 Celei Orlea 538 61 1.86 0.08 9 Telesti Bistrița 548 270 4.59 5.51 11 Turceni Jilț 540 376 1.12 0.45 12 Târgu Cărbuneşti Gilort 749 630 9.67 4.94 13 Turburea 590 1027 12.29 14.63 15 Broşteni Motru 526 646 7.94 6.73 18 Faţa Motrului 384 1700 13.25 10.18 16 Corcova Cosustea 482 420 2.95 2.57 17 Strehaia Hușnița 257 312 0.78 0.31 20 Bustuchin Amaradia 310 37 0.08 0.29 5 Gauging stations and upstream catchments considered for the study (2001-2010) Note: Qavg = average liquid discharge between 2001 and 2010. Ravg = average solid discharge between 2001 and 2010. The stations are organized in upstream - downstream order, river-wise. AIR AND WATER COMPONENTS OF THE ENVIRONMENT INTERNATIONAL CONFERENCE 2. Methods