The effects of rainfall intensity and rock fragment cover on soil hydrological responses in Central Chile

In Chile, 60% of the usable land is affected by erosion and the effects of rock fragment cover, however protecting the soil against these degradation processes have been sparsely studied. Understanding the effects of rainfall intensity and rock fragment cover on soil hydrological processes is a majo...

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Autores principales:	von Bennewitz,Eduardo, Aladro,Jesús
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2017
Materias:	Soil erosion runoff generation CAZALAC rainfall simulator infiltration rate sediment concentration
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162017000300017
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spelling	oai:scielo:S0718-951620170003000172017-10-13The effects of rainfall intensity and rock fragment cover on soil hydrological responses in Central Chilevon Bennewitz,EduardoAladro,Jesús Soil erosion runoff generation CAZALAC rainfall simulator infiltration rate sediment concentration In Chile, 60% of the usable land is affected by erosion and the effects of rock fragment cover, however protecting the soil against these degradation processes have been sparsely studied. Understanding the effects of rainfall intensity and rock fragment cover on soil hydrological processes is a major challenge for the formulation and implementation of proper soil conservation plans. The effects of rock fragment cover on soil erosion rate, surface runoff, sediment concentration and infiltration rate were studied on a Cambisol in Central Chile using the CAZALAC rainfall simulator. Nine rainfall simulations consisting of different combinations of rainfall intensities (70 mm h-1, 90 mm h-1, and 120 mm h-1) and rock fragment cover (0%, 40%, and 70%) were carried out. Rock fragment cover contributed to delay the time to start surface runoff and the amount surface runoff was in most of the cases directly proportional to rainfall intensity and inversely proportional to rock fragment cover percentage. Rock fragment cover reduced surface runoff in up to 72.06% in the case of the highest rainfall intensity. Final infiltration rate increased directly proportional to the percentage of rock fragment cover for each of the studied rainfall intensities. Erosion rate tended to be reduced by rock fragments (82.2% of reduction in the case of the highest rainfall intensity and rock fragment cover), but this positive effects were not always proportional to rock fragment cover percentage. In general, lower sediment concentrations were found in covered soils (more than a tenfold reduction in the case of 120 mm h-1 rainfall intensity).info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.17 n.3 20172017-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162017000300017en10.4067/S0718-95162017000300017
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Soil erosion runoff generation CAZALAC rainfall simulator infiltration rate sediment concentration
spellingShingle	Soil erosion runoff generation CAZALAC rainfall simulator infiltration rate sediment concentration von Bennewitz,Eduardo Aladro,Jesús The effects of rainfall intensity and rock fragment cover on soil hydrological responses in Central Chile
description	In Chile, 60% of the usable land is affected by erosion and the effects of rock fragment cover, however protecting the soil against these degradation processes have been sparsely studied. Understanding the effects of rainfall intensity and rock fragment cover on soil hydrological processes is a major challenge for the formulation and implementation of proper soil conservation plans. The effects of rock fragment cover on soil erosion rate, surface runoff, sediment concentration and infiltration rate were studied on a Cambisol in Central Chile using the CAZALAC rainfall simulator. Nine rainfall simulations consisting of different combinations of rainfall intensities (70 mm h-1, 90 mm h-1, and 120 mm h-1) and rock fragment cover (0%, 40%, and 70%) were carried out. Rock fragment cover contributed to delay the time to start surface runoff and the amount surface runoff was in most of the cases directly proportional to rainfall intensity and inversely proportional to rock fragment cover percentage. Rock fragment cover reduced surface runoff in up to 72.06% in the case of the highest rainfall intensity. Final infiltration rate increased directly proportional to the percentage of rock fragment cover for each of the studied rainfall intensities. Erosion rate tended to be reduced by rock fragments (82.2% of reduction in the case of the highest rainfall intensity and rock fragment cover), but this positive effects were not always proportional to rock fragment cover percentage. In general, lower sediment concentrations were found in covered soils (more than a tenfold reduction in the case of 120 mm h-1 rainfall intensity).
author	von Bennewitz,Eduardo Aladro,Jesús
author_facet	von Bennewitz,Eduardo Aladro,Jesús
author_sort	von Bennewitz,Eduardo
title	The effects of rainfall intensity and rock fragment cover on soil hydrological responses in Central Chile
title_short	The effects of rainfall intensity and rock fragment cover on soil hydrological responses in Central Chile
title_full	The effects of rainfall intensity and rock fragment cover on soil hydrological responses in Central Chile
title_fullStr	The effects of rainfall intensity and rock fragment cover on soil hydrological responses in Central Chile
title_full_unstemmed	The effects of rainfall intensity and rock fragment cover on soil hydrological responses in Central Chile
title_sort	effects of rainfall intensity and rock fragment cover on soil hydrological responses in central chile
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162017000300017
work_keys_str_mv	AT vonbennewitzeduardo theeffectsofrainfallintensityandrockfragmentcoveronsoilhydrologicalresponsesincentralchile AT aladrojesus theeffectsofrainfallintensityandrockfragmentcoveronsoilhydrologicalresponsesincentralchile AT vonbennewitzeduardo effectsofrainfallintensityandrockfragmentcoveronsoilhydrologicalresponsesincentralchile AT aladrojesus effectsofrainfallintensityandrockfragmentcoveronsoilhydrologicalresponsesincentralchile
_version_	1714206553473548288

The effects of rainfall intensity and rock fragment cover on soil hydrological responses in Central Chile

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