Work on policy and practice of non-renewable groundwater resource utilisation, on the conjunctive management of groundwater/surface-water resources, and on groundwater storage and water security.
| 1982 | Foster S S D, Mackie C D & Townsend P. P Instn Civil Engr : 72 : 563-584 | Exploration, evaluation and development of large scale groundwater supplies in the Botswana Kalahari. | C-1 |
| 1992 | FOSTER S S D. IAH Selected Papers Hydrogeology 3 : 321-336 | Unsustainable development and irrational exploitation of groundwater resources in developing nations – an overview. | |
| 1996 | Clarke R, Lawrence A & FOSTER S. UNEP Environ Library 15 | Groundwater : a threatened resource. | |
| 2008 | FOSTER S S D & Loucks D P. UNESCO-IHP VI Groundwater Series 15 | Non-renewable groundwater resources – a guide to socially-sustainable management for water-policy makers. | C-2 |
| 2010 | FOSTER S, Steenbergen F van, Zuleta J & Garduño H, GW-MATE Strategic Overview Series 2 : World Bank | Conjunctive use of groundwater and surface water – from spontaneous coping strategy to adaptive resource management. | C-3 |
| 2012 | FOSTER S , Tuinhof A & Steenbergen F van. Water SA 38 : 359 | Managed groundwater development for water-supply security in Sub-Saharan Africa ; investment priorities. |
C-4 |
| 2013 | FOSTER S, Chilton J, Nijsten G-J & Richts A Current Opinion Environ Sustblty 5 : 685-695. | Groundwater – a global focus on the ‘local resource’. | |
| 2014 | FOSTER S & MacDonald A, Hydrogeology J 22 : 1489-1492. | The ‘water security’ dialogue – why it needs to be better informed about groundwater. |
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