**Meet the editors**

For the past four decades, Dr. Muhammad Salik Javaid has been working in the fields of academics, research, development, execution, management, and policy formulation assignments with the Corps of Engineers and engineering universities within Pakistan and abroad. He also worked as the chief consulting engineer for the Engineer-in-Chief and Director General Planning for the

Reconstruction and Rehabilitation Authority after the 2005 earthquake in Pakistan. He is a graduate of Georgia Tech, Atlanta, USA, where he undertook his Master's and Doctoral studies in the fields of dam overtopping and ocean bed hydrodynamics.

Presently, he is the chairman of the Department of Civil Engineering at Abasyn University at Islamabad Campus, Pakistan. He has also conducted courses on applied hydrology, hydraulics engineering, and river engineering for civil engineering students at various campuses.

Dr. Shaukat Ali Khan is a graduate of NUST, Pakistan; University of Calgary, Canada; and University of Sheffield, UK, where he received his BSc, MS, and PhD degrees, respectively.

Dr. Shaukat has a multidisciplinary teaching, research, and practical experience of over 25 years in civil engineering. His experience includes design and implemen-

tation of buildings, bridges, and heavy irrigation/hydraulic structures in Pakistan, Canada, and the UK. His research interests include risk and vulnerability assessment, strengthening and design of irrigation and hydraulic structures, as exhibited by numerous publications. Currently, Dr. Shaukat is serving as the associate dean, Faculty of Engineering, at Abasyn University, Peshawar.

Contents

**Preface VII**

**Section 1 Aquifers: The Resource 1**

**Section 2 Aquifers: The Structure 9**

**Section 3 Aquifers: The Fluid 53**

Hsin-Fu Yeh

**Central Tunisia 91**

Zouari

Chapter 1 **Introductory Chapter: Aquifers Today and Tomorrow 3** Muhammad Salik Javaid and Shaukat Ali Khan

Salako Adebayo O and Adepelumi Abraham A

Chapter 4 **The Discharge-Storage Relationship and the Long-Term Storage Changes of Southern Taiwan 55**

Chapter 5 **Recharge and Turnover of Groundwater in Coastal Aquifers with Emphasis on Hydrochemistry and Isotopes 77**

Gunnar Jacks and Satheesachandran Thambi

Chapter 6 **Hydrochemical Investigation and Quality Assessment of**

**Groundwater in the BouHafna-Haffouz Unconfined Aquifers,**

Hatem El Mejri, Amor Ben Moussa, SarraBel Haj Salem and Kamel

Chapter 2 **Aquifer, Classification and Characterization 11**

Abdullah Faruque and Joshua Goldowitz

Chapter 3 **Effect of Hydrofracking on Aquifers 33**
