Estimation of Natural Groundwater Recharge

1. Front Matter

   Pages i-xiii

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2. Groundwater Recharge Concepts

   1. Front Matter

      Pages 1-1

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   2. Groundwater Recharge Concepts

      • J. Balek

      Pages 3-9

   3. An Unexpected Factor Affecting Recharge from Ephemeral River Flows in SWA/Namibia

      • S. Crerar, R. G. Fry, P. M. Slater, G. van Langenhove, D. Wheeler

      Pages 11-28

   4. On the Continuity of Aquifer Systems on the Crystalline Basement of Burkina Faso

      • J. J. van der Sommen, W. Geirnaert

      Pages 29-45

3. Groundwater Recharge Estimation (Part 1) Physical/Chemical Methods

   1. Front Matter

      Pages 47-47

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   2. A Review of Some of the Physical, Chemical and Isotopic Techniques Available for Estimating Groundwater Recharge

      • G. B. Allison

      Pages 49-72

   3. Evaporation in Arid and Semi-Arid Regions

      • H. A. R. de Bruin

      Pages 73-88

   4. Satellite Remote Sensing and Energy Balance Modelling for Water Balance Assessment in (Semi-) Arid Regions

      • A. A. van de Griend, R. J. Gurney

      Pages 89-116

   5. A Proposed Study of Recharge Processes in Fracture Aquifers of Semi-Arid Botswana

      • A. Gieske, E. Selaolo

      Pages 117-124

   6. Estimation of Natural Groundwater Recharge under Saudi Arabian Arid Climatic Conditions

      • M. J. Abdulrazzak, A. U. Sorman, O. Abu Rizaiza

      Pages 125-138

   7. Solute Profile Techniques for Recharge Estimation in Semi-Arid and Arid Terrain

      • W. M. Edmunds, W. G. Darling, D. G. Kinniburgh

      Pages 139-157

   8. Recharge Estimation from the Depth-Distribution of Environmental Chloride in the Unsaturated Zone — Western Australian Examples

      • M. L. Sharma

      Pages 159-173

   9. Natural Recharge Measurements in the Hard Rock Regions of Semi-Arid India Using Tritium Injection — A Review

      • R. N. Athavale, R. Rangarajan

      Pages 175-194

   10. Comparison of Recharge Estimates from Injected Tritium Technique and Regional Hydrological Modelling in the Case of a Granitic Basin in Semi-Arid India

       • D. Muralidharan, C. S. Murti, R. N. Athavale

       Pages 195-204

   11. Studies on Natural Recharge to the Groundwater by Isotope Techniques in Arid Western Rajasthan, India

       • H. Chandrasekharan, S. V. Navada, S. K. Jain, S. M. Rao, Y. P. Singh

       Pages 205-220

4. Groundwater Recharge Estimation (Part 2) Numerical Modelling Techniques

   1. Front Matter

      Pages 221-221

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   2. Numerical and Conceptual Models for Recharge Estimation in Arid and Semi-Arid Zones

      • K. R. Rushton

      Pages 223-238

   3. Methods for Estimation of Natural Groundwater Recharge Directly from Precipitation — Comparative Studies in Sandy Till

      • Per-Olof Johansson

      Pages 239-270

   4. The Principles of Inverse Modelling for Estimation of Recharge from Hydraulic Head

      • H. Allison

      Pages 271-282

In view of the rapidly expanding urban, industrial and agri­ cultural water requirements in many areas and the normally associated critical unreliability of surface water supplies in arid and semi-arid zones, groundwater exploration and use is of fundamental importance for logical economic development. Two interrelated facets should be evident in all such groundwater projects : (a) definition of groundwater recharge mechanisms and characteristics for identified geological formations, in order to determine whether exploitation in the long-term involves 'mining' of an es­ sentially 'fossil' resource or withdrawal from a dynamic supply. A solution to this aspect is essential for development of a re­ source management policy: (b) determination of recharge variability in time and space to thus enable determination of total aquifer input and to quantify such practical aspects as 'minimum risk' waste disposal locations and artificial recharge potential via (e.g.) devegetation or engi­ neering works. However, current international developments relating to natural recharge indicate the following 'problems' ; no single comprehensive estimation technique can yet be iden­ tified from the spectrum of methods available; all are reported to give suspect results.

• Arid Zone
• Precipitation
• Rain
• development
• energy
• forest
• formation
• fracture
• groundwater
• isotope
• modeling
• modelling
• moisture
• remote sensing
• satellite
• hydrogeology

• Institute of Earth Sciences, Free University, Amsterdam, The Netherlands

  Ian Simmers

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