| Water erosion prediction at a national scale for South Africa JJ Le Roux, TL Morgenthal, J Malherbe, DJ Pretorius, PD Sumner Water SA 34 (3), 305-314, 2008 | 208 | 2008 |
| The effect of rock moisture on Schmidt hammer rebound: tests on rock samples from Marion Island and South Africa P Sumner, W Nel Earth Surface Processes and Landforms: The Journal of the British …, 2002 | 161 | 2002 |
| Monitoring soil erosion in South Africa at a regional scale: review and recommendations JJ Le Roux, TS Newby, PD Sumner South African Journal of Science 103 (7-8), 329-335, 2007 | 152 | 2007 |
| On the persistence of ‘weathering’ K Hall, C Thorn, P Sumner Geomorphology 149, 1-10, 2012 | 117 | 2012 |
| The maritime Subantarctic: a distinct periglacial environment J Boelhouwers, S Holness, P Sumner Geomorphology 52 (1-2), 39-55, 2003 | 114 | 2003 |
| Factors controlling gully development: comparing continuous and discontinuous gullies JJ Le Roux, PD Sumner Land Degradation & Development 23 (5), 440-449, 2012 | 97 | 2012 |
| Experimental sandstone weathering using different wetting and drying moisture amplitudes PD Sumner, MJ Loubser Earth Surface Processes and Landforms: The Journal of the British …, 2008 | 93 | 2008 |
| Observations on a blockstream in the vicinity of Sani Pass, Lesotho Highlands, southern Africa J Boelhouwers, S Holness, I Meiklejohn, P Sumner Permafrost and Periglacial Processes 13 (4), 251-257, 2002 | 62 | 2002 |
| Gully erosion: A comparison of contributing factors in two catchments in South Africa N Mararakanye, PD Sumner Geomorphology 288, 99-110, 2017 | 61 | 2017 |
| Rainfall and temperature attributes on the Lesotho–Drakensberg escarpment edge, southern Africa W Nel, P Sumner Geografiska Annaler: Series A, Physical Geography 90 (1), 97-108, 2008 | 60 | 2008 |
| Climate change melts Marion Island's snow and ice. PD Sumner, KI Meiklejohn, JC Boelhouwers, DW Hedding South African Journal of Science 100, 2004 | 53 | 2004 |
| A baseline climatology of sounding‐derived parameters associated with heavy rainfall over Gauteng, South Africa LL Dyson, J Van Heerden, PD Sumner International Journal of Climatology 35 (1), 114-127, 2015 | 51 | 2015 |
| Rock weathering on the eastern mountains of southern Africa: Review and insights from case studies PD Sumner, KJ Hall, JL Van Rooy, KI Meiklejohn Journal of African Earth Sciences 55 (5), 236-244, 2009 | 51 | 2009 |
| Trends in rainfall total and variability (1970–2000) along the KwaZulu-Natal Drakensberg foothills W Nel, PD Sumner South African Geographical Journal 88 (2), 130-137, 2006 | 50 | 2006 |
| Geomorphological characteristics of small debris flows on Junior's Kop, Marion Island, maritime sub‐Antarctic J Boelhouwers, S Holness, P Sumner Earth Surface Processes and Landforms: The Journal of the British …, 2000 | 48 | 2000 |
| Intensity, energy and erosivity attributes of rainstorms in the KwaZulu-Natal Drakensberg, South Africa W Nel, PD Sumner South African Journal of Science 103 (9-10), 398-402, 2007 | 37 | 2007 |
| Short communication First rainfall data from the KZN Drakensberg escarpment edge (2002 and 2003) W Nel, PD Sumner Water SA 31 (3), 399-402, 2005 | 37 | 2005 |
| Thermal attributes of rock weathering: zonal or azonal? A comparison of rock temperatures in different environments PD Sumner, W Nel, DW Hedding Polar Geography 28 (2), 79-92, 2004 | 32 | 2004 |
| Effect of altitude on erosive characteristics of concurrent rainfall events in the KwaZulu-Natal Drakensberg W Nel, D Reynhardt, P Sumner Water SA 36 (4), 2010 | 29 | 2010 |
| Deterioration of San rock art: new findings, new challenges K Hall, I Meiklejohn, J Arocena, L Prinsloo, P Sumner, L Hall South African Journal of Science 103 (9-10), 361-362, 2007 | 29 | 2007 |
Werner NelProfessor, University of Fort HareVerified email at ufh.ac.za
