© NERC All rights reserved Hydrological extremes CWC project – Project Board Imperial College 14 th February 2011 BGS’s input.

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Presentation transcript:

© NERC All rights reserved Hydrological extremes CWC project – Project Board Imperial College 14 th February 2011 BGS’s input

© NERC All rights reserved Feedbacks and extremes – groundwater perspective Feedbacks: Climate change – Rainfall, temperature, windspeed, etc. Land-use: human and natural response to CC Recharge and abstraction – both modified Extremes: Droughts and floods Impacts on abstraction (DO)

© NERC All rights reserved Scale and complexity - Thames Basin

© NERC All rights reserved IO Upper Thames Corallian Ock Kennet London Wealden LGS Eocene UGS, Chalk + Palaeogene Sand and gravel Bedrock GO

© NERC All rights reserved Potential study areas Thames basin Oxford – GW enhanced flooding Colne valley – adited sources Pang/Lambourn – GW flooding and drought Jurassic Lst – Baseflow under drought conditions Eden Valley Role of GW in flooding?? Security of GW abstraction Not forgetting: Isle of Wight

© NERC All rights reserved

Oxford

© NERC All rights reserved Oxford

© NERC All rights reserved Colne Valley Note alluvium, sands and gravel, and river terrace deposits

© NERC All rights reserved JULES: Soil Moisture Unsaturated Zone ZOOMQ3D: Groundwater Flow Overland Flow Pang/Lambourn

© NERC All rights reserved Pang/Lambourn

© NERC All rights reserved Jurassic Lst

© NERC All rights reserved Eden Valley

© NERC All rights reserved

What we think we’re doing 1.Choose study areas: likely to be Colne Valley, Thames Chalk, Jurassic Limestone and Oxford as well as Eden Valley. (WP2a) 2.Develop geological and hydrogeological understanding. Characterisation of soil and, superficial and bedrock cover (thickness and hydraulic properties).(WP2a) 3.Decide on generic examples and create investigative models to understand particular issues.(WP2a/b) 4.Develop modelling system to tackle operational issues – linking regional scale model to borehole scale models.(WP2b) 5.Run scenarios: Flooding and droughts.(WP2c) Cartesian model Radial model

© NERC All rights reserved Hydrological extremes CWC project – Project Board Imperial College 14 th February 2011 BGS’s input