Post on 14-May-2015
transcript
Sun Yangbo Yellow River Conservancy Commission
Yellow River Water Allocation and Environmental Flow Management
2005/10 2
River Length (km)
1. Nile 6670 2. Amazon 6436 3. Yangtze 6300 4. Mississippi 6021 5. Yellow River 5464 6. Mekong 4880
2005/10 3
Facts and Numbers
basin area 790,000 km2
river length 5,464 km elevation drop 4,480 m average rainfall 450 mm population 115 million total water resources 58 BCM
per capita water 550 m3
YRCC HQ
Challenges for River Basin Management
Floods Water Scarcity
Water pollution Soil Erosion/Sediment
5
Scaled Yellow River
Digital Yellow River
Flood safety
Real Yellow River
1 2 9
Maintain Healthy Life of the Yellow River
Flow regime
Pollution control
Sediment mgt
Mission
Indicator
Actions
Tool Box
4 3 6 8 7 5
Framework to Sustainable River Basin Management
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
Political Decision and public consensus
Laws and policy making Public participation
Demand of Environmental Flow Management
river flow Ecological restoration Sediments transportation Water quality
1998: Call for Environmental Flow Management Program
Water scarcity Climate Change Economic development Population growth Transboundary river
New Challenges: River Runs Dry since
1970s
Environmental Flow Management Program 1998-2010
Water 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
万家寨水库!
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 recovered from the dry up periods
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
Presentation Heading Presentation Heading
River Health Index
Social/economics
Fish
Physical form Hydrology Water quality Ecology
Environmental
Indicators…
Invertebrates
Vegetation
Wetland vegetation
(remote sensing)
Primary productivity
Hydraulic habitat
Survey and modelling