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Yellow River Water Allocationand Environmental Flow Management Sun Yangbo Yellow River Conservancy Commission
River Length (km) 1. Nile 6670 2. Amazon 6436 3. Yangtze 6300 4. Mississippi 6021 5. Yellow River 5464 6. Mekong 48802005/10 2
Facts and Numbers YRCC HQ basin area 790,000 km2 river length 5,464 km elevation drop 4,480 m average rainfall 450 mm population 115 million total water 58 BCM resources2005/10 per capita water 550 m3 3
Challenges for River Basin Management Floods Water Scarcity Water pollution Soil Erosion/Sediment
Framework to Sustainable River Basin ManagementMission Maintain Healthy Life of the Yellow River Flood Flow Pollution SedimentIndicator safety regime control mgtActions 1 2 3 4 5 6 7 8 9 Real Digital ScaledTool Box Yellow Yellow Yellow River River River 5
1 × Ultimate target “Keeping the Yellow River Healthy” 4 × Criteria (“the 4-nos”) No embankment breaching No river running dry No water pollution beyond standard No riverbed rising further 9 × Actions Take measures to reduce sediment inflow to the Yellow River Manage effectively the water resources utilization of the Yellow River basin and its related regions Strengthen the study on water transfer plans to increase the water resources of the Yellow River Establish water and sediment regulation system Work out a scientific and reasonable general plan for the control and management of the lower river course Create favourable hydrological process to mitigate the shrinking of the main channel Meet water demands to maintain river itself cleaning capacity Carry out Yellow River Delta management to reduce seawater impact to the lower reach Maintain the ecological system sustainable in the Yellow River delta
1998: Call for Environmental Flow Management ProgramNew Challenges: Political Decision and publicRiver Runs Dry since consensus 1970s Laws and policy making Public participation Water scarcity Demand of Environmental Flow Climate Change Management Economic development river flow Population growth Ecological restoration Transboundary river Sediments transportation Water quality
Environmental Flow Management Program 1998-2010Water allocation and Environmental Flow Legal measures, Public Consultation, Technical measures Water Allocation Scheme 58 bcm=37+21 bcm (EF) Remote control and Real time control Artificial Floods Flushing river sediments Flood plain and wetlands restoration Improve river morphology and Reduce flood risk Ecological restoration
Water Quantity and Water Quality Continuous river flow restored in 1997, river dried for 226 days since 1998, the river has flow continuously for 10 years Water quality improved Legislation of water pollution control Pollution reduction and cleaner production Tech. Monitoring and supervision enhanced Water quality trends of mainstream of the Yellow River in 2002-2006
Riparian Wetlands Wetlands Comprise of river channel, flood plain, retention basin, lakes, etc. The total area of the downstream floodplain about 3544 km2 The ecological status of the wetlands depend on the fresh water supply Wetlands eco-system habitat of the fishes and migration birds 万家 寨水 recovered from the dry up periods 库!
Balance of Social and Ecological Benefits A river provides social benefits Flood control function Drought control function Water supply function Hydro-power function Navigation function Water quality self-purification function Recreation function A river can be managed to optimise, or choose a balance of, the: Social benefits Ecological benefits The River Health Index is an important tool to help achieve the balance
River Health Index Social/economics Environmental Indicators… Ecology Physical form Hydrology Water quality Wetland vegetation Fish (remote sensing) Invertebrates Primary Vegetation productivity Survey and Hydraulic modelling habitatPresentation Heading