global monitoring of runoff and lake storage: - important elements of integrated global observing...
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Global monitoring of runoff and lake storage:
- important elements of Integrated Global Observing Systems
- integral parts of water resources management including prevention of water-induced disasters
New Project, facilitated by GEO:Hydrological Applications – Runoff Project
(HARON)Basic Rationale of the Initiative
IGWCOIGWCO GCOSGCOS
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Provision of near real-time monitoring data and products of large scale rivers and lakes from:
•in-situ gauge observations, and •satellite observations (based on developing altimetry technology)
Will fulfill goal of observing / analyzing surface runoff and lake storage variations over time.
IGWCOIGWCO GCOSGCOS
HARON: Basic Rationale (cont.)
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• Development of new in-situ and remote sensing sensors for water cycle measurements
• Near real-time regional and global computation of the water balance, as input for climate models and seasonal forecasting
• Validation of large-area precipitation fields against basin-wide hydrological records to validate GCMs
• Detection of climate variability signal in changing hydrological patterns of river runoff on seasonal and inter-annual scales
• Estimation of bio-geochemical fluxes from continents into world oceans
•Variation of freshwater fluxes from the continents and influence on thermohaline circulation / ocean currents
HARON Project: Raison HARON Project: Raison d’êtred’être
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Main Goals • Support water resources management while contributing in a cross-cutting fashion to all societal benefit areas of GEO
• Improve & support the closure of the global water budget, in line with requirements of GCOS and the Global Water Cycle Experiment (GEWEX)
Main ObjectiveIntegrate, in a phased approach, dedicated river gauging networks of existing hydrological stations into a global runoff observation network
Goals & ObjectivesGoals & Objectives
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Strengthening of in-situ and satellite monitoring networks of estuaries, rivers, lakes, reservoirs, and groundwater levels
Expected ResultsExpected Results
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PHASE I – Upgrade & sustained maintenance of major global run-off stations, monitoring continental freshwater fluxes into the world’s oceans
PHASE II – Integration of hydro-meteorological and related in-situ components with satellite observations
PHASE III – Consolidation of integrated hydrological observation network development and application of user-oriented information products made available by HARON
Production of an implementation plan for a broad global water cycle data integration system, combining water cycle in-situ, satellite, and model output data
Implementation PhasesImplementation Phases
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Global Terrestrial Network - Global Terrestrial Network - RunoffRunoff
Network consists of 380 gauging stations worldwide
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…….Complement terrestrial with .Complement terrestrial with satellite (radar altimetry) satellite (radar altimetry)
observationsobservations
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…….Arriving at multi-platform integrated .Arriving at multi-platform integrated observations…observations…
Red indicates area where NRT products are currently generated
Blue indicates area where products may be generated in the future.
Source: ESA, De Montford University, UK
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Main Global Groundwater Regions
Phase 2 (example I)Phase 2 (example I)
Establishment of phased connections with relevant existing or proposed networks
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GEMS-Water Stations: Global Distribution
Establishment of phased connections with relevant existing or proposed networks
Phase 2 (example II)Phase 2 (example II)
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Rehabilitation of the in-situ observational infrastructure
• Technical upgrade, as required, of the major run-off stations which monitor continental freshwater fluxes into the world’s oceans of the GTN – R network
Linkage with relevant research and development activities
• Use of satellite altimeters to measure inland water heights for major rivers - relevant research issue to supplement in-situ observations for the derivation of discharge data
• Continuous follow-up on results of national and regional initiatives for application during project implementation
Main ElementsMain Elements