Search Results

1 - 9 of 9 items :

  • "gullies formation" x
Clear All

Abstract

São Vicente island (República de Cabo Verde) lies within the Sahelian zone and faces a number of natural hazards, of which the most significant ones are erosion and gully formation, desertification and flash flooding hazards. Based on examples, we set out to examine the main factors involved in the development of these natural hazards from a regional point of view, while simultaneously assessing the importance of anthropic action as a structural factor. The investigation of Lazareto’s gullies (located to the west of Mindelo) aimed to determine the main factors of the gullies formation. It also sought to demonstrate that the gullies’ formation is a reliable indicator of the high rates of erosion on a regional scale. The approach to the desertification hazards was based on farmers’ perception related to the evolution of agricultural production, strategies to mitigate drought and desertification issues, consequences and future prospects based on a set of interviews conducted in Ribeira da Vinha. Finally, the intense rainfall event that occurred on August 26, 2008 was analysed to identify the main vulnerability factors of the city in light of the flash flood hazard.

. Tato, K., Hurni, H., 1992. Soil conservation for survival, Soil and Water Conservation Society (SWCS). Tebebu, T.Y., 2009. Assessment of hydrological controls on gully formation near Lake Tana, northern highlands of Ethiopia. Cornell University. Tebebu, T., Abiy, A., Dahlke, H., Easton, Z., Zegeye, A., Tilahun, S., Collick, A., Kidnau, S., Moges, S., Dadgari, F., 2010. Surface and subsurface flow effect on permanent gully formation and upland erosion near Lake Tana in the northern highlands of Ethiopia. Hydrology and Earth System Sciences Discussions, 7, 5235

-1688.2010.00431.x Tamene, L., Park, S. J., Dikau, R., Vlek, P. L. 2006. Analysis of factors determining sediment yield variability in the highlands of northern Ethiopia. Geomorphology 76(1-2), 76–91. DOI: 10.1016/j.geomorph.2005.10.007 Tebebu, T.Y., Abiy, A.Z., Zegeye, A.D., Dahlke, H.E., Easton, Z.M., Tilahun, S.A, Collick, A.S., Kidanu, S., Moges, S., Dadgar, F., Steenhuis, T.S. 2010. Surface and sub-surface flow effect on permanent gully formation and upland erosion near Lake Tana in the northern highlands of Ethiopia. Hydrol Earth Syst Sci 14(11), 2207–2217. DOI: 10

engineering method to predict recharge. Journal of Hydrology, 84, 221-229. Tamene, L., Park, S., Dikau, R., Vlek, P., 2006. Analysis of factors determining sediment yield variability in the highlands of northern Ethiopia. Geomorphology, 76, 76-91. Tebebu, T., Abiy, A., Zegeye, A., Dahlke, H., Easton, Z., Tilahun, S., Collick, A., Kidnau, S., Moges, S., Dadgari, F., 2010. Surface and subsurface flow effect on permanent gully formation and upland erosion near Lake Tana in the northern highlands of Ethiopia. Hydrology and Earth System Sciences, 14, 2207-2217. Thornthwaite, C

, T.S., Hrncir, M., Poteau, D., Romero Luna, E.J., Tilahun, S.A., Caballero, L.A., Guzman, C.D., Stoof, C.R., Sanda, M., Yitaferu, B., Cislerova, M., 2013. A saturated excess runoff pedotransfer function for vegetated watersheds. Vadose Zone J., 12. DOI: 10.2136/vzj2013.03.0060. Tebebu, T.Y., Abiy, A.Z., Zegeye, A.D., Dahlke, H.E., Easton, Z.M., Tilahun, S., Collick, A.S., Kidanu, S., Moges, S., Dadgari, F., Steenhuis, T.S., 2010. Surface and subsurface flow effect on permanent gully formation and upland erosion near Lake Tana in the northern highlands of Ethiopia

, N., Steenhuis, T.S., Van de Giesen, N.C., 2002. Scale effects of Hortonian overland flow and rainfall-runoff dynamics: Laboratory validation of a process-based model. Earth Surface Processes and Landforms, 27, 847–855. Tebebu, T.Y., Abi, A.Z., Zegeye, A.D., Dahlke, H.E., Easton, Z.M., Tilahun, S.A., Collick, A.S., Kidnau, S., Moges, S., Dadgari, F., 2010. Surface and subsurface flow effect on permanent gully formation and upland erosion near Lake Tana in the northern highlands of Ethiopia. Hydrology and Earth System Sciences, 14, 2207–2217. Tebebu, T.Y., Steenhuis

Management 107(1–3): 231–239, DOI 10.1016/S0378-1127(97)00335-6. http://dx.doi.org/10.1016/S0378-1127(97)00335-6 [34] Malik I, 2006. Contribution to understanding the historical evolution of meandering rivers using dendrochronological methods: example of the Mała Panew River in southern Poland. Earth Surface Processes and Landforms 31(10): 1227–1245, DOI 10.1002/esp.1331. http://dx.doi.org/10.1002/esp.1331 [35] Malik I, 2008. Dating of small gullies formation and rates of erosion in old gullies under forest by means of anatomical changes in exposed tree roots (Southern

, Bortenschlager S and Hass JN, 2006. Tripartite climate reversal in Central Europe 5600-5300 years ago. Quaternary Research 65(1): 3-19, DOI 10.1016/j.yqres.2005.06.009. Malik I, 2008. Dating of small gully formation and establishing erosion rates in old gullies under forest by means of anatomical changes in exposed tree roots (Southern Poland). Geomorphology 93(3-4): 421-436, DOI 10.1016/j.geomorph.2007.03.007. Malik JN, Khadkikar AS and Merh SS, 1999. Allogenic control on late Quaternary continental sedimentation in the Mahi River basin, western India. Journal of the

the rate of sheet and gully erosion, or to determine the patterns of gully formation, and sometimes estimate the time when erosion started ( Bodoque et al , 2005 ; Malik, 2006b ). Considering the proposed methods and scope of research, the presented approach in the paper allows to obtain reliable results to reconstruct the soil erosion and sediment accumulation dynamics in an area of great archaeological importance. Extensive archaeological studies show that this loess region belongs to heavily transformed loess areas under the influence of agricultural activity