© NERC All rights reserved The use of a gw model to improve the conceptual understanding of gw flow in the Braunton Burrows dune systems – the known unknowns.

Slides:

Advertisements

Similar presentations

Simulation of groundwater response to development: CENTRAL PASSAIC RIVER BASIN, NJ Fatoumata Barry 1,2, Duke Ophori 1, Jeffrey L. Hoffman 2 and Robert.

Advertisements

Groundwater Salinity Simulation of A Subsurface Reservoir in Penghu Island (Pescadores), Taiwan Professor Yih-Chi TanProfessor Yih-Chi Tan Department of.

Scaling Biomass Measurements for Examining MODIS Derived Vegetation Products Matthew C. Reeves and Maosheng Zhao Numerical Terradynamic Simulation Group.

Evergreen tree dynamics in tropical savanna

NWS Calibration Workshop, LMRFC March, 2009 Slide 1 Sacramento Model Derivation of Initial Parameters.

Introduction to Groundwater Flow Modeling Prof. Dr. Halil Önder Fall 2008.

Mine dewatering for pit slope stability

Chapter 8 Fetter, Applied Hydrology 4 th Edition, 2001 Geology of Groundwater Occurrence.

The Influence of 3D Dune Topography on Salt Water Intrusion in Marina Romea, Italy: a numerical modeling study using LIDAR Data Pauline Mollema, Marco.

Chapter 15 & 16 Review. Question # 1 The rock and other material that a stream carries is known as its ….. Stream load.

Groundwater P = Q + ET + G +  S. Floridan Aquifer Extent.

Hydrological Modelling of Small Scale Processes in a Wetland Habitat O. M. JOHANSEN, J.B. JENSEN & M.L. PEDERSEN Aalborg University, Department of Civil.

By Saleh A. Al-Hassoun Associate Professor Department of Civil Engineering College of Engineering King Saud University Riyadh, Saudi Arabia

Flux through Peat An investigation into fluid flow in the Serpentine Bog, Belgrade Lakes Watershed, Maine.

School of Civil and Environmental Engineering Life Impact The University of Adelaide Water Balance and the Influence of Soil Structural Changes on Final.

Hydrologic/Watershed Modeling Glenn Tootle, P.E. Department of Civil and Environmental Engineering University of Nevada, Las Vegas

The Effect of Soil Hydraulic Properties and Deep Seepage Losses on Drainage Flow using DRAINMOD Debjani Deb 26 th April, 2004.

Climate change impact in a shallow coastal Mediterranean aquifer, at Saïdia, Morocco Júlio Carneiro, A. Correia Geophysical Centre of Évora, Évora, Portugal.

Vadose-zone Monitoring System

Arc Hydro groundwater data model: a data model for groundwater systems within ArcGIS ESRI user conference May 2004 Gil Strassberg and David Maidment, University.

P R U & I K PHATCHARASAK ARLAI1 and MANFRED KOCH2

Uses of Modeling A model is designed to represent reality in such a way that the modeler can do one of several things: –Quickly estimate certain aspects.

Dr Cróna Hodges Research Officer Earth Observation Group, Aberystwyth University Y Plas, Machynlleth 20 th May 2014

NGR: Postcode: © Crown Copyright All rights reserved. Image reproduced with permission of Ordnance Survey and Ordnance Survey of Northern Ireland.

Dr. R.P.Pandey Scientist F. NIH- Nodal Agency Misconception: A DSS takes decisions ---(No)

The Islamic University of Gaza Faculty of Engineering Approaches to Groundwater Modeling Conceptual Model.

Determination of Ellenburger Aquifer Sustainability

Groundwater Modeling Study case : Central Plain of Thailand

Introduction One of the likely impacts of modern-age climate change in California identified by the California Department of Water Resources (DWR) was.

Using Ground-Water Model Predictions and the ppr and opr Statistics to Guide Data Collection.

Management Application: Volume of Water in Storage (An Ogallala Example with Applicability to All Aquifers in Texas) Judy A. Reeves, Ph.D. Hydrogeologist,

8.4 Landforms and Florida Copyright © Houghton Mifflin Harcourt Publishing Company 1.

U.S. Department of the Interior U.S. Geological Survey Dr. Robert M. Hirsch Associate Director for Water April 16, 2007 USGS: Water Resources Program.

LL-III physics-based distributed hydrologic model in Blue River Basin and Baron Fork Basin Li Lan (State Key Laboratory of Water Resources and Hydropower.

GROUND-WATER AVAILABILITY Planning for Sustainable Future Water Supplies South of the C&D Canal Delaware Geological Survey – January 2007.

Hydrologic Related Activities within the Joint Institute for Caribbean Climate Studies Eric Harmsen, Ph.D., P.E. Dept. of Agricultural and Biosystems Engineering.

Study on scaling property of Topindex and the aquifer rating-curve in Illinois with the application of TopModel CE394K Term Project Presentation CE394K.

Scenarios 1.Tidal influence 2.Extreme storm surge (wave overtopping, max. limit 200 l/s/m, period 2 h) Outlook calibration and validation of 3D model transfer.

Geomatics Tools for Inventorying and Assessing Headwaters Adam Hogg Inventory Monitoring & Assessment, Ministry of Natural Resources Eastern Region Headwaters.

MEDITATE - Kick-off meeting - Montpellier, 07-08/05/04 IWRM Integrated Water Resources Management EAU/RMD Sandra Lanini.

A More Accurate and Powerful Tool for Managing Groundwater Resources and Predicting Land Subsidence: an application to Las Vegas Valley Zhang, Meijing.

Estimating Groundwater Recharge in Porous Media Aquifers in Texas Bridget Scanlon Kelley Keese Robert Reedy Bureau of Economic Geology Jackson School of.

Modflow utilization for the Saharan aquifers management M. Zammouri September 2013.

Floridan Aquifer System Regional Groundwater Availability Study Jason Bellino / David Sumner FL AWRA Annual Meeting, Key Largo, FL July 23, 2015.

AOM 4643 Principles and Issues in Environmental Hydrology.

Types of Boundary Conditions 1.Specified head (including constant head) h = f (x,y,z,t) 2.Specified flux (including no flow)  h/  l = -q l /K l 3.Head-dependent.

© NERC All rights reserved Groundwater flooding FLOOD1 – Interreg IIIA project (BGS, BGRM, Brighton Uni.) Aim to understand processes leading to groundwater.

Kingsley Dunham Centre Keyworth Nottingham NG12 5GG Tel © NERC All rights reserved Investigative modelling for the ZIGARF project… Chris.

The Islamic University of Gaza Faculty of Engineering Civil Engineering Department EENV 5326 Groundwater Modeling.

Model Status Update July 01, Agenda Purpose Model Development Update Model Calibration Status Next Steps Schedule Public Input.

Model Status Update December 17, Agenda Purpose Model Conceptualization Recap Model Development Model Calibration Status Model Data for Review Next.

Arc Hydro groundwater data model: a data model for groundwater systems within ArcGIS AWRA Specialty Conference Geographic Information Systems (GIS) and.

Water Management Options Analysis Sonoma Valley Model Results Sonoma Valley Technical Work Group October 8, /08/2007.

Water Resources Assessment Main Resources – Surface water – Groundwater – Unconventional Tools – Flood routing/delineation models – Runoff models – GIS.

Integrated hydrological modelling with selected climate scenarios for assessment of future changes in groundwater levels and runoff in coastal areas Torben.

Objective: conceptual model definition and steady state simulation of groundwater flow.

Workshop on “Coastal Aquifer Management in the Caribbean” 14 th - 16 th December 2011 Trinidad and Tobago Workshop on “Coastal Aquifer Management in the.

EASTERN MUNICIPAL WATER DISTRICT San Jacinto Groundwater Basin Numerical Flow Model Update Brian Powell Director of Planning March 17,

NGR: Postcode: © Crown Copyright All rights reserved. Image reproduced with permission of Ordnance Survey and Ordnance Survey of Northern Ireland.

Water Cycle Basics. What is a Watershed? An area of land that drains all of the streams and rainfall to a common outlet such as a river or bay.

Groundwater P = Q + ET + G +  S. Floridan Aquifer Extent.

Chapter 3 The Conceptual Model

Chapter 6 Calibration and Application Process

Uses of Modeling A model is designed to represent reality in such a way that the modeler can do one of several things: Quickly estimate certain aspects.

The Islamic University of Gaza Faculty of Engineering Approaches to Groundwater Modeling Conceptual Model.

Water Table: is the level at which the groundwater pressure is equal to atmospheric pressure. Aquitard: is a zone within the earth that restricts.

GIS – BASED DRASTIC MODEL FOR ASSESSING

Water Table: is the level at which the groundwater pressure is equal to atmospheric pressure. Aquitard: is a zone within the earth that restricts.

Chapter 5 Sources and Sinks

2New Jersey Department of Environmental Protection

Presentation transcript:

© NERC All rights reserved The use of a gw model to improve the conceptual understanding of gw flow in the Braunton Burrows dune systems – the known unknowns Corinna Abesser Andrew Hughes British Geological Survey

© NERC All rights reserved Braunton Burrows 5km 2km Contains Ordnance Survey data © Crown copyright and database rights Ordnance Survey licence number : /2007

© NERC All rights reserved Braunton Burrows North-south oriented dunes (38 maoD) Discontinuous belt of slacks with ephemeral wet weather pools Rain fed groundwater system Designated area: SSSI/ Biosphere Reserve

© NERC All rights reserved Braunton Burrows Geology: Blown sand/ marine beach deposits overlying marine clays

© NERC All rights reserved Braunton Burrows Golf course Military training area Designated area status: SSSI/ Biosphere Reserve Piezometer transects in central / southern part of dune system Water level monitoring since 1966 Contains Ordnance Survey data © Crown copyright and database rights Ordnance Survey licence number : /2007

© NERC All rights reserved Background Less frequent flooding of dune slacks Concern of ‘drying out’ of the dune system due to  Land drainage in adjacent Braunton Marsh  Increased ET caused by dune vegetation/ encroachment of various scrub species  Changes in effective precipitation Burden, 1998

© NERC All rights reserved Modelling aims To gain better understanding of dynamics of sand dune systems by investigating effects of  Changing precipitation pattern and  Changing vegetation cover on dune hydrology

© NERC All rights reserved Conceptual Model Robins (2007)

© NERC All rights reserved Conceptual Model

© NERC All rights reserved 1 layer 200 x200m cell size Leakage nodes Sea level Impermeable / no flow Numerical Model ? ? ?

© NERC All rights reserved Results

© NERC All rights reserved Results Y-scale: -1 – 15(25)m Green= observed Blue = modelled

© NERC All rights reserved Sensitivity Analysis Structural sensitivity Parameter sensitivity Boundary location Base level elevation Boundary conditions Hydraulic conductivity Transmissivity DrainageLeakage Storage

© NERC All rights reserved Field observations

© NERC All rights reserved 1 layer 200 x200m cell size Leakage nodes Sea level Impermeable / no flow Numerical Model

© NERC All rights reserved Results

© NERC All rights reserved Results Y-scale: 8 – 15m Green= observed Blue = modelled

© NERC All rights reserved Known unknowns T distribution - Base topography of aquifer - K distribution T= transmissivity (m 2 /day), K = hydraulic conductivity (m/day) ?????? Drainage/ recharge at golf course

© NERC All rights reserved Known unknowns T distribution - Base topography of aquifer - K distribution (zonation?) T= transmissivity (m 2 /day), K = hydraulic conductivity (m/day) Drainage/ recharge at golf course (historically/current)

© NERC All rights reserved Consult Stakeholders Define Problem Data collection Conceptual u/s Decide on approach Construct model Prediction simulations Refine model

© NERC All rights reserved Initial modelling....  provided valuable tool for testing conceptual understanding of the Braunton Burrows dune system  supported identification of additional mechanisms that control gw levels in the dune system  helped to constrain the unknowns / to identify important controls/ to focus data acquisition  allows better informed calibration based on (geological) understanding of the dune system

© NERC All rights reserved References Burden, RJ (1998): A hydrological investigation of three Devon sand dune systems: Braunton Burrows, Northam Burrows and Dawlish Warren. Unpublished PhD Thesis, University of Plymouth. Robins, N. (2007): Conceptual flow model and changes with time at Braunton Burrows coastal dunes. BGS Commissioned Report, CR/07/072N