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Hydrogeology

Hydrogeology. Dave Watkins BSc 3 AG, EGG, EST, CZEM MSc Geotechnical Engineering. Hydrogeology – Lecture 1 INTRODUCTION. Introduction 1.1 Schedule for the course 1.2 What is hydrogeology? 1.3 Why study hydrogeology 2 The hydrological cycle and its interactions 3 Types of aquifer

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Hydrogeology

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  1. Hydrogeology Dave Watkins BSc 3 AG, EGG, EST, CZEM MSc Geotechnical Engineering

  2. Hydrogeology – Lecture 1INTRODUCTION • Introduction 1.1 Schedule for the course 1.2 What is hydrogeology? 1.3 Why study hydrogeology 2 The hydrological cycle and its interactions 3 Types of aquifer 3.1 Confined 3.2 Unconfined 3.3 Leaky

  3. Schedule for the course

  4. What is Hydrogeology ? • Hydrology – The study of water in the environment • Hydrogeology – The study of underground water

  5. What is an aquifer ? • An aquifer is a soil or rock unit that can store and transmitsignificant quantities of groundwater.

  6. Store water • There must be porosity to provide space for storage • Transmit • The pores must be interconnected to allow the water to flow continuously between the pores. Permeability. • Significant • The quantity that may be significant for one application may not be significant for another. • Groundwater • Is the water held and transmitted by the saturated part of the aquifer.

  7. A journey around the hydrological cycle

  8. Reasons for studying Hydrogeology

  9. Involving Geology Hydrology Chemistry Mathematics Physics Computing Engineering Agriculture To answer questions posed by Engineers Planners Ecologists Managers Etc. Hydrogeology is an interdisciplinary subject

  10. Groundwater is: • A precious resource • but sustainable if properly managed, in terms of quantity and quality • A cause of engineering problems • Ground stability, drainage and dewatering • An active part of the environment • Linking elements of the hydrological cycle

  11. How rivers flow video

  12. Basic hydrogeological terms and definitions that you need to know

  13. Related to aquifers • Unconfined aquifer (phreatic) • Confined aquifer (piezometric) • Leaky aquifer (semi-confined) • Perched aquifer • Aquitard • Aquiclude

  14. Related to flow • Hydraulic head • Hydraulic gradient • Hydraulic conductivity • Specific discharge • Aquifer flow • Intrinsic permeability • Transmissivity

  15. Related to storage • Specific retention • Specific yield • Elastic storativity

  16. Related to wells • Specific drawdown • Specific capacity • Well efficiency • Source protection zones

  17. Types of Aquifer • Unconfined – Phreatic • Confined – Piezometric • Leaky – Semi-confined/unconfined • Refer to handouts

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