Erosion under forest cover and erosion in deforested areas in the humid tropical zone
Although surface erosion and gullying are insignificant under dense tropical forest cover, severe erosion can occur locally as a result of land slippage in saturated soils. Examples may be observed in Madagascar, in the forests of Anamalazoatra and Marojejy. Another documented case of widespread erosion under forest cover may be found in the Peruvian Amazon, on a steeply sloping mountainside near the village of Merced. These are exceptions, however. During geological periods of tectonic transformation, intense erosion could have occurred under dense forest cover, forming a jagged relief or what are referred to as “badlands”. But in all these cases, erosion under forest cover could only have occurred when the level of riverbeds rose in relation to the level of the sea, as during the Quaternary glaciations. In places where the forest cover has disappeared, the soil is sometimes spectacularly eroded. The same is true of previously forested areas that have recently been severely thinned. Extreme cases may be found in Madagascar, Congo, Gabon, Brazil and the temperate regions of the United States, particularly in the Tennessee copper basin. These examples clearly confirm the anti-erosive value of forests. Once erosion begins, it can only be halted at great cost and over limited areas. Forests are therefore a means to prevent erosion naturally, cheaply and over large areas. Abstract adapted by the editorial team.
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dig-cirad-fr-5792262024-01-28T23:14:32Z http://agritrop.cirad.fr/579226/ http://agritrop.cirad.fr/579226/ Erosion under forest cover and erosion in deforested areas in the humid tropical zone. Aubréville André, Bossanyi Ilona (trad.). 2015. Bois et Forêts des Tropiques (323) : 103-112.https://doi.org/10.19182/bft2015.323.a31259 <https://doi.org/10.19182/bft2015.323.a31259> Erosion under forest cover and erosion in deforested areas in the humid tropical zone Aubréville, André Bossanyi, Ilona eng 2015 Bois et Forêts des Tropiques K01 - Foresterie - Considérations générales P36 - Érosion, conservation et récupération des sols forêt tropicale déboisement érosion érosion hydrique ruissellement lutte antiérosion conservation des sols récupération des sols histoire naturelle coupe rase géologie http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_2651 http://aims.fao.org/aos/agrovoc/c_8318 http://aims.fao.org/aos/agrovoc/c_35388 http://aims.fao.org/aos/agrovoc/c_2652 http://aims.fao.org/aos/agrovoc/c_7165 http://aims.fao.org/aos/agrovoc/c_6474 http://aims.fao.org/aos/agrovoc/c_5088 http://aims.fao.org/aos/agrovoc/c_16170 http://aims.fao.org/aos/agrovoc/c_3232 Madagascar Congo Gabon Brésil États-Unis d'Amérique http://aims.fao.org/aos/agrovoc/c_4510 http://aims.fao.org/aos/agrovoc/c_1811 http://aims.fao.org/aos/agrovoc/c_3161 http://aims.fao.org/aos/agrovoc/c_1070 http://aims.fao.org/aos/agrovoc/c_8114 Although surface erosion and gullying are insignificant under dense tropical forest cover, severe erosion can occur locally as a result of land slippage in saturated soils. Examples may be observed in Madagascar, in the forests of Anamalazoatra and Marojejy. Another documented case of widespread erosion under forest cover may be found in the Peruvian Amazon, on a steeply sloping mountainside near the village of Merced. These are exceptions, however. During geological periods of tectonic transformation, intense erosion could have occurred under dense forest cover, forming a jagged relief or what are referred to as “badlands”. But in all these cases, erosion under forest cover could only have occurred when the level of riverbeds rose in relation to the level of the sea, as during the Quaternary glaciations. In places where the forest cover has disappeared, the soil is sometimes spectacularly eroded. The same is true of previously forested areas that have recently been severely thinned. Extreme cases may be found in Madagascar, Congo, Gabon, Brazil and the temperate regions of the United States, particularly in the Tennessee copper basin. These examples clearly confirm the anti-erosive value of forests. Once erosion begins, it can only be halted at great cost and over limited areas. Forests are therefore a means to prevent erosion naturally, cheaply and over large areas. Abstract adapted by the editorial team. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/579226/1/579226.pdf text Cirad license info:eu-repo/semantics/openAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.19182/bft2015.323.a31259 10.19182/bft2015.323.a31259 info:eu-repo/semantics/altIdentifier/doi/10.19182/bft2015.323.a31259 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.19182/bft2015.323.a31259 |
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K01 - Foresterie - Considérations générales P36 - Érosion, conservation et récupération des sols forêt tropicale déboisement érosion érosion hydrique ruissellement lutte antiérosion conservation des sols récupération des sols histoire naturelle coupe rase géologie http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_2651 http://aims.fao.org/aos/agrovoc/c_8318 http://aims.fao.org/aos/agrovoc/c_35388 http://aims.fao.org/aos/agrovoc/c_2652 http://aims.fao.org/aos/agrovoc/c_7165 http://aims.fao.org/aos/agrovoc/c_6474 http://aims.fao.org/aos/agrovoc/c_5088 http://aims.fao.org/aos/agrovoc/c_16170 http://aims.fao.org/aos/agrovoc/c_3232 http://aims.fao.org/aos/agrovoc/c_4510 http://aims.fao.org/aos/agrovoc/c_1811 http://aims.fao.org/aos/agrovoc/c_3161 http://aims.fao.org/aos/agrovoc/c_1070 http://aims.fao.org/aos/agrovoc/c_8114 K01 - Foresterie - Considérations générales P36 - Érosion, conservation et récupération des sols forêt tropicale déboisement érosion érosion hydrique ruissellement lutte antiérosion conservation des sols récupération des sols histoire naturelle coupe rase géologie http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_2651 http://aims.fao.org/aos/agrovoc/c_8318 http://aims.fao.org/aos/agrovoc/c_35388 http://aims.fao.org/aos/agrovoc/c_2652 http://aims.fao.org/aos/agrovoc/c_7165 http://aims.fao.org/aos/agrovoc/c_6474 http://aims.fao.org/aos/agrovoc/c_5088 http://aims.fao.org/aos/agrovoc/c_16170 http://aims.fao.org/aos/agrovoc/c_3232 http://aims.fao.org/aos/agrovoc/c_4510 http://aims.fao.org/aos/agrovoc/c_1811 http://aims.fao.org/aos/agrovoc/c_3161 http://aims.fao.org/aos/agrovoc/c_1070 http://aims.fao.org/aos/agrovoc/c_8114 |
spellingShingle |
K01 - Foresterie - Considérations générales P36 - Érosion, conservation et récupération des sols forêt tropicale déboisement érosion érosion hydrique ruissellement lutte antiérosion conservation des sols récupération des sols histoire naturelle coupe rase géologie http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_2651 http://aims.fao.org/aos/agrovoc/c_8318 http://aims.fao.org/aos/agrovoc/c_35388 http://aims.fao.org/aos/agrovoc/c_2652 http://aims.fao.org/aos/agrovoc/c_7165 http://aims.fao.org/aos/agrovoc/c_6474 http://aims.fao.org/aos/agrovoc/c_5088 http://aims.fao.org/aos/agrovoc/c_16170 http://aims.fao.org/aos/agrovoc/c_3232 http://aims.fao.org/aos/agrovoc/c_4510 http://aims.fao.org/aos/agrovoc/c_1811 http://aims.fao.org/aos/agrovoc/c_3161 http://aims.fao.org/aos/agrovoc/c_1070 http://aims.fao.org/aos/agrovoc/c_8114 K01 - Foresterie - Considérations générales P36 - Érosion, conservation et récupération des sols forêt tropicale déboisement érosion érosion hydrique ruissellement lutte antiérosion conservation des sols récupération des sols histoire naturelle coupe rase géologie http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_2651 http://aims.fao.org/aos/agrovoc/c_8318 http://aims.fao.org/aos/agrovoc/c_35388 http://aims.fao.org/aos/agrovoc/c_2652 http://aims.fao.org/aos/agrovoc/c_7165 http://aims.fao.org/aos/agrovoc/c_6474 http://aims.fao.org/aos/agrovoc/c_5088 http://aims.fao.org/aos/agrovoc/c_16170 http://aims.fao.org/aos/agrovoc/c_3232 http://aims.fao.org/aos/agrovoc/c_4510 http://aims.fao.org/aos/agrovoc/c_1811 http://aims.fao.org/aos/agrovoc/c_3161 http://aims.fao.org/aos/agrovoc/c_1070 http://aims.fao.org/aos/agrovoc/c_8114 Aubréville, André Erosion under forest cover and erosion in deforested areas in the humid tropical zone |
description |
Although surface erosion and gullying are insignificant under dense tropical forest cover, severe erosion can occur locally as a result of land slippage in saturated soils. Examples may be observed in Madagascar, in the forests of Anamalazoatra and Marojejy. Another documented case of widespread erosion under forest cover may be found in the Peruvian Amazon, on a steeply sloping mountainside near the village of Merced. These are exceptions, however. During geological periods of tectonic transformation, intense erosion could have occurred under dense forest cover, forming a jagged relief or what are referred to as “badlands”. But in all these cases, erosion under forest cover could only have occurred when the level of riverbeds rose in relation to the level of the sea, as during the Quaternary glaciations. In places where the forest cover has disappeared, the soil is sometimes spectacularly eroded. The same is true of previously forested areas that have recently been severely thinned. Extreme cases may be found in Madagascar, Congo, Gabon, Brazil and the temperate regions of the United States, particularly in the Tennessee copper basin. These examples clearly confirm the anti-erosive value of forests. Once erosion begins, it can only be halted at great cost and over limited areas. Forests are therefore a means to prevent erosion naturally, cheaply and over large areas. Abstract adapted by the editorial team. |
author2 |
Bossanyi, Ilona |
author_facet |
Bossanyi, Ilona Aubréville, André |
format |
article |
topic_facet |
K01 - Foresterie - Considérations générales P36 - Érosion, conservation et récupération des sols forêt tropicale déboisement érosion érosion hydrique ruissellement lutte antiérosion conservation des sols récupération des sols histoire naturelle coupe rase géologie http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_2651 http://aims.fao.org/aos/agrovoc/c_8318 http://aims.fao.org/aos/agrovoc/c_35388 http://aims.fao.org/aos/agrovoc/c_2652 http://aims.fao.org/aos/agrovoc/c_7165 http://aims.fao.org/aos/agrovoc/c_6474 http://aims.fao.org/aos/agrovoc/c_5088 http://aims.fao.org/aos/agrovoc/c_16170 http://aims.fao.org/aos/agrovoc/c_3232 http://aims.fao.org/aos/agrovoc/c_4510 http://aims.fao.org/aos/agrovoc/c_1811 http://aims.fao.org/aos/agrovoc/c_3161 http://aims.fao.org/aos/agrovoc/c_1070 http://aims.fao.org/aos/agrovoc/c_8114 |
author |
Aubréville, André |
author_sort |
Aubréville, André |
title |
Erosion under forest cover and erosion in deforested areas in the humid tropical zone |
title_short |
Erosion under forest cover and erosion in deforested areas in the humid tropical zone |
title_full |
Erosion under forest cover and erosion in deforested areas in the humid tropical zone |
title_fullStr |
Erosion under forest cover and erosion in deforested areas in the humid tropical zone |
title_full_unstemmed |
Erosion under forest cover and erosion in deforested areas in the humid tropical zone |
title_sort |
erosion under forest cover and erosion in deforested areas in the humid tropical zone |
url |
http://agritrop.cirad.fr/579226/ http://agritrop.cirad.fr/579226/1/579226.pdf |
work_keys_str_mv |
AT aubrevilleandre erosionunderforestcoveranderosionindeforestedareasinthehumidtropicalzone |
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