Preface: Howard Wheater, Soroosh Sorooshian and K. D. Sharma; 1. Modelling hydrological processes in arid and semi-arid areas - an introduction Howard Wheater; 2. Global precipitation estimation from satellite imagery using artificial neural networks Soroosh Sorooshian, K.-L. Hsu, B. Imam and Y. Hong; 3. Modelling semi-arid and arid hydrology and water resources - the southern Africa experience D. A. Hughes; 4. Use of the IHACRES rainfall-runoff model in arid and semi-arid regions B. F. W. Croke and A. J. Jakeman; 5. KINEROS2 and the AGWA modelling framework D. J. Semmens, D. C. Goodrich, C. L. Unkrich, R. E. Smith, D. A. Woolhiser and S. N. Miller; 6. A distributed spatial sediment delivery model for arid regions K. D. Sharma; 7. The Modular Modeling System (MMS): a toolbox for water and environmental resources management G. H. Leavesley, S. L. Markstrom, R. J. Viger and L. E. Hay; 8. Calibration, uncertainty and regional analysis of conceptual rainfall-runoff models Howard Wheater, T. Wagener and N. McIntyre; 9. Real-time flow forecasting P. C. Young; 10. Real-time flood forecasting - Indian experience R. D. Singh; 11. Groundwater modeling in hard-rock terrain in semi-arid areas: experience from India S. Ahmed, J.-C. Maréchal, E. Ledoux and G. de Marsily; Appendix.