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. | |
| 2016 | MacDonald A M et al Nature Geoscience DOI:10.1038/NGEO2791 | Groundwater quality and depletion in the Indo-Gangetic Basin mapped from in-situ observations | |
| 2017 | FOSTER S & Sage R Hydrogeology Journal 25 : 1233-1236. | Groundwater science in water-utility operations : global reflections on current status and future need http://AH -HJ GW Science & Water Utilities (May 2017).pdf | C-5 |
| 2020 | Argamasilla-Ruiz M, Foster S & Andreo-Navarro B Water Policy 22 : 961-971 | Water-resource stress on the Spanish Costa del Sol : policy requirements to improve supply security. | C-6 |
| 2020 | Hirata R & Foster S Quart J Eng Geology & Hydrogeology 54 : 091 | The Guarani Aquifer System – from regional reserves to local use. |