Orders of magnitude increase in soil erosion associated with land use change from native to cultivated vegetation in a Brazilian savannah environment
The Brazilian savanna (cerrado) is a large and important economic and environmental region that is experiencing significant loss of its natural landscapes due to pressures of food and energy production, which in turn has caused large increases in soil erosion. However the magnitude of the soil erosi...
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| Autor*in: |
Oliveira, Paulo Tarso S [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2015 |
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| Rechteinformationen: |
Nutzungsrecht: Copyright © 2015 John Wiley & Sons, Ltd. © COPYRIGHT 2015 Wiley Subscription Services, Inc. |
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| Übergeordnetes Werk: |
Enthalten in: Earth surface processes and landforms - New York, NY [u.a.] : Wiley, 1981, 40(2015), 11, Seite 1524-1532 |
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| Übergeordnetes Werk: |
volume:40 ; year:2015 ; number:11 ; pages:1524-1532 |
| Links: |
|---|
| DOI / URN: |
10.1002/esp.3738 |
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| 520 | |a The Brazilian savanna (cerrado) is a large and important economic and environmental region that is experiencing significant loss of its natural landscapes due to pressures of food and energy production, which in turn has caused large increases in soil erosion. However the magnitude of the soil erosion increases in this region is not well understood, in part because scientific studies of surface runoff and soil erosion are scarce or nonexistent in the cerrado as well as in other savannahs of the world. To understand the effects of deforestation we assessed natural rainfall‐driven rates of runoff and soil erosion on an undisturbed tropical woodland classified as ‘cerrado sensu stricto denso’ and bare soil. Results were evaluated and quantified in the context of the cover and management factor (C‐factor) of the Universal Soil Loss Equation (USLE). Replicated data on precipitation, runoff, and soil loss on plots (5 × 20 m) under undisturbed cerrado and bare soil were collected for 77 erosive storms that occurred over 3 years (2012 through 2014). C‐factor was computed annually using values of rainfall erosivity and soil loss rate. We found an average runoff coefficient of ~20% for the plots under bare soil and less than 1% under undisturbed cerrado. The mean annual soil losses in the plots under bare soil and cerrado were 12.4 t ha ‐1 yr ‐1 and 0.1 t ha ‐1 yr ‐1 , respectively. The erosivity‐weighted C‐factor for the undisturbed cerrado was 0.013. Surface runoff, soil loss and C‐factor were greatest in the summer and fall. Our results suggest that shifts in land use from the native to cultivated vegetation result in orders of magnitude increases in soil loss rates. These results provide benchmark values that will be useful to evaluate past and future land use changes using soil erosion models and have significance for undisturbed savanna regions worldwide. Copyright © 2015 John Wiley & Sons, Ltd. | ||
| 540 | |a Nutzungsrecht: Copyright © 2015 John Wiley & Sons, Ltd. | ||
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| 650 | 4 | |a USLE | |
| 650 | 4 | |a deforestation | |
| 650 | 4 | |a infiltration | |
| 650 | 4 | |a soil and water conservation | |
| 650 | 4 | |a runoff | |
| 650 | 4 | |a Soil erosion | |
| 650 | 4 | |a Rain and rainfall | |
| 650 | 4 | |a Analysis | |
| 650 | 4 | |a Land use | |
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| 700 | 1 | |a Wendland, Edson |4 oth | |
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10.1002/esp.3738 doi PQ20160617 (DE-627)OLC1962506800 (DE-599)GBVOLC1962506800 (PRQ)g2308-b76a07f2e1793d4b9b5935980d4e5931596aeb7c37aff7f869a84d2a75b087c43 (KEY)0004410520150000040001101524ordersofmagnitudeincreaseinsoilerosionassociatedwi DE-627 ger DE-627 rakwb eng 910 DNB Oliveira, Paulo Tarso S verfasserin aut Orders of magnitude increase in soil erosion associated with land use change from native to cultivated vegetation in a Brazilian savannah environment 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The Brazilian savanna (cerrado) is a large and important economic and environmental region that is experiencing significant loss of its natural landscapes due to pressures of food and energy production, which in turn has caused large increases in soil erosion. However the magnitude of the soil erosion increases in this region is not well understood, in part because scientific studies of surface runoff and soil erosion are scarce or nonexistent in the cerrado as well as in other savannahs of the world. To understand the effects of deforestation we assessed natural rainfall‐driven rates of runoff and soil erosion on an undisturbed tropical woodland classified as ‘cerrado sensu stricto denso’ and bare soil. Results were evaluated and quantified in the context of the cover and management factor (C‐factor) of the Universal Soil Loss Equation (USLE). Replicated data on precipitation, runoff, and soil loss on plots (5 × 20 m) under undisturbed cerrado and bare soil were collected for 77 erosive storms that occurred over 3 years (2012 through 2014). C‐factor was computed annually using values of rainfall erosivity and soil loss rate. We found an average runoff coefficient of ~20% for the plots under bare soil and less than 1% under undisturbed cerrado. The mean annual soil losses in the plots under bare soil and cerrado were 12.4 t ha ‐1 yr ‐1 and 0.1 t ha ‐1 yr ‐1 , respectively. The erosivity‐weighted C‐factor for the undisturbed cerrado was 0.013. Surface runoff, soil loss and C‐factor were greatest in the summer and fall. Our results suggest that shifts in land use from the native to cultivated vegetation result in orders of magnitude increases in soil loss rates. These results provide benchmark values that will be useful to evaluate past and future land use changes using soil erosion models and have significance for undisturbed savanna regions worldwide. Copyright © 2015 John Wiley & Sons, Ltd. Nutzungsrecht: Copyright © 2015 John Wiley & Sons, Ltd. © COPYRIGHT 2015 Wiley Subscription Services, Inc. USLE deforestation infiltration soil and water conservation runoff Soil erosion Rain and rainfall Analysis Land use Nearing, Mark A oth Wendland, Edson oth Enthalten in Earth surface processes and landforms New York, NY [u.a.] : Wiley, 1981 40(2015), 11, Seite 1524-1532 (DE-627)130395609 (DE-600)602320-4 (DE-576)015897788 0197-9337 nnns volume:40 year:2015 number:11 pages:1524-1532 http://dx.doi.org/10.1002/esp.3738 Volltext http://onlinelibrary.wiley.com/doi/10.1002/esp.3738/abstract http://search.proquest.com/docview/1712387192 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO AR 40 2015 11 1524-1532 |
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10.1002/esp.3738 doi PQ20160617 (DE-627)OLC1962506800 (DE-599)GBVOLC1962506800 (PRQ)g2308-b76a07f2e1793d4b9b5935980d4e5931596aeb7c37aff7f869a84d2a75b087c43 (KEY)0004410520150000040001101524ordersofmagnitudeincreaseinsoilerosionassociatedwi DE-627 ger DE-627 rakwb eng 910 DNB Oliveira, Paulo Tarso S verfasserin aut Orders of magnitude increase in soil erosion associated with land use change from native to cultivated vegetation in a Brazilian savannah environment 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The Brazilian savanna (cerrado) is a large and important economic and environmental region that is experiencing significant loss of its natural landscapes due to pressures of food and energy production, which in turn has caused large increases in soil erosion. However the magnitude of the soil erosion increases in this region is not well understood, in part because scientific studies of surface runoff and soil erosion are scarce or nonexistent in the cerrado as well as in other savannahs of the world. To understand the effects of deforestation we assessed natural rainfall‐driven rates of runoff and soil erosion on an undisturbed tropical woodland classified as ‘cerrado sensu stricto denso’ and bare soil. Results were evaluated and quantified in the context of the cover and management factor (C‐factor) of the Universal Soil Loss Equation (USLE). Replicated data on precipitation, runoff, and soil loss on plots (5 × 20 m) under undisturbed cerrado and bare soil were collected for 77 erosive storms that occurred over 3 years (2012 through 2014). C‐factor was computed annually using values of rainfall erosivity and soil loss rate. We found an average runoff coefficient of ~20% for the plots under bare soil and less than 1% under undisturbed cerrado. The mean annual soil losses in the plots under bare soil and cerrado were 12.4 t ha ‐1 yr ‐1 and 0.1 t ha ‐1 yr ‐1 , respectively. The erosivity‐weighted C‐factor for the undisturbed cerrado was 0.013. Surface runoff, soil loss and C‐factor were greatest in the summer and fall. Our results suggest that shifts in land use from the native to cultivated vegetation result in orders of magnitude increases in soil loss rates. These results provide benchmark values that will be useful to evaluate past and future land use changes using soil erosion models and have significance for undisturbed savanna regions worldwide. Copyright © 2015 John Wiley & Sons, Ltd. Nutzungsrecht: Copyright © 2015 John Wiley & Sons, Ltd. © COPYRIGHT 2015 Wiley Subscription Services, Inc. USLE deforestation infiltration soil and water conservation runoff Soil erosion Rain and rainfall Analysis Land use Nearing, Mark A oth Wendland, Edson oth Enthalten in Earth surface processes and landforms New York, NY [u.a.] : Wiley, 1981 40(2015), 11, Seite 1524-1532 (DE-627)130395609 (DE-600)602320-4 (DE-576)015897788 0197-9337 nnns volume:40 year:2015 number:11 pages:1524-1532 http://dx.doi.org/10.1002/esp.3738 Volltext http://onlinelibrary.wiley.com/doi/10.1002/esp.3738/abstract http://search.proquest.com/docview/1712387192 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO AR 40 2015 11 1524-1532 |
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10.1002/esp.3738 doi PQ20160617 (DE-627)OLC1962506800 (DE-599)GBVOLC1962506800 (PRQ)g2308-b76a07f2e1793d4b9b5935980d4e5931596aeb7c37aff7f869a84d2a75b087c43 (KEY)0004410520150000040001101524ordersofmagnitudeincreaseinsoilerosionassociatedwi DE-627 ger DE-627 rakwb eng 910 DNB Oliveira, Paulo Tarso S verfasserin aut Orders of magnitude increase in soil erosion associated with land use change from native to cultivated vegetation in a Brazilian savannah environment 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The Brazilian savanna (cerrado) is a large and important economic and environmental region that is experiencing significant loss of its natural landscapes due to pressures of food and energy production, which in turn has caused large increases in soil erosion. However the magnitude of the soil erosion increases in this region is not well understood, in part because scientific studies of surface runoff and soil erosion are scarce or nonexistent in the cerrado as well as in other savannahs of the world. To understand the effects of deforestation we assessed natural rainfall‐driven rates of runoff and soil erosion on an undisturbed tropical woodland classified as ‘cerrado sensu stricto denso’ and bare soil. Results were evaluated and quantified in the context of the cover and management factor (C‐factor) of the Universal Soil Loss Equation (USLE). Replicated data on precipitation, runoff, and soil loss on plots (5 × 20 m) under undisturbed cerrado and bare soil were collected for 77 erosive storms that occurred over 3 years (2012 through 2014). C‐factor was computed annually using values of rainfall erosivity and soil loss rate. We found an average runoff coefficient of ~20% for the plots under bare soil and less than 1% under undisturbed cerrado. The mean annual soil losses in the plots under bare soil and cerrado were 12.4 t ha ‐1 yr ‐1 and 0.1 t ha ‐1 yr ‐1 , respectively. The erosivity‐weighted C‐factor for the undisturbed cerrado was 0.013. Surface runoff, soil loss and C‐factor were greatest in the summer and fall. Our results suggest that shifts in land use from the native to cultivated vegetation result in orders of magnitude increases in soil loss rates. These results provide benchmark values that will be useful to evaluate past and future land use changes using soil erosion models and have significance for undisturbed savanna regions worldwide. Copyright © 2015 John Wiley & Sons, Ltd. Nutzungsrecht: Copyright © 2015 John Wiley & Sons, Ltd. © COPYRIGHT 2015 Wiley Subscription Services, Inc. USLE deforestation infiltration soil and water conservation runoff Soil erosion Rain and rainfall Analysis Land use Nearing, Mark A oth Wendland, Edson oth Enthalten in Earth surface processes and landforms New York, NY [u.a.] : Wiley, 1981 40(2015), 11, Seite 1524-1532 (DE-627)130395609 (DE-600)602320-4 (DE-576)015897788 0197-9337 nnns volume:40 year:2015 number:11 pages:1524-1532 http://dx.doi.org/10.1002/esp.3738 Volltext http://onlinelibrary.wiley.com/doi/10.1002/esp.3738/abstract http://search.proquest.com/docview/1712387192 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO AR 40 2015 11 1524-1532 |
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10.1002/esp.3738 doi PQ20160617 (DE-627)OLC1962506800 (DE-599)GBVOLC1962506800 (PRQ)g2308-b76a07f2e1793d4b9b5935980d4e5931596aeb7c37aff7f869a84d2a75b087c43 (KEY)0004410520150000040001101524ordersofmagnitudeincreaseinsoilerosionassociatedwi DE-627 ger DE-627 rakwb eng 910 DNB Oliveira, Paulo Tarso S verfasserin aut Orders of magnitude increase in soil erosion associated with land use change from native to cultivated vegetation in a Brazilian savannah environment 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The Brazilian savanna (cerrado) is a large and important economic and environmental region that is experiencing significant loss of its natural landscapes due to pressures of food and energy production, which in turn has caused large increases in soil erosion. However the magnitude of the soil erosion increases in this region is not well understood, in part because scientific studies of surface runoff and soil erosion are scarce or nonexistent in the cerrado as well as in other savannahs of the world. To understand the effects of deforestation we assessed natural rainfall‐driven rates of runoff and soil erosion on an undisturbed tropical woodland classified as ‘cerrado sensu stricto denso’ and bare soil. Results were evaluated and quantified in the context of the cover and management factor (C‐factor) of the Universal Soil Loss Equation (USLE). Replicated data on precipitation, runoff, and soil loss on plots (5 × 20 m) under undisturbed cerrado and bare soil were collected for 77 erosive storms that occurred over 3 years (2012 through 2014). C‐factor was computed annually using values of rainfall erosivity and soil loss rate. We found an average runoff coefficient of ~20% for the plots under bare soil and less than 1% under undisturbed cerrado. The mean annual soil losses in the plots under bare soil and cerrado were 12.4 t ha ‐1 yr ‐1 and 0.1 t ha ‐1 yr ‐1 , respectively. The erosivity‐weighted C‐factor for the undisturbed cerrado was 0.013. Surface runoff, soil loss and C‐factor were greatest in the summer and fall. Our results suggest that shifts in land use from the native to cultivated vegetation result in orders of magnitude increases in soil loss rates. These results provide benchmark values that will be useful to evaluate past and future land use changes using soil erosion models and have significance for undisturbed savanna regions worldwide. Copyright © 2015 John Wiley & Sons, Ltd. Nutzungsrecht: Copyright © 2015 John Wiley & Sons, Ltd. © COPYRIGHT 2015 Wiley Subscription Services, Inc. USLE deforestation infiltration soil and water conservation runoff Soil erosion Rain and rainfall Analysis Land use Nearing, Mark A oth Wendland, Edson oth Enthalten in Earth surface processes and landforms New York, NY [u.a.] : Wiley, 1981 40(2015), 11, Seite 1524-1532 (DE-627)130395609 (DE-600)602320-4 (DE-576)015897788 0197-9337 nnns volume:40 year:2015 number:11 pages:1524-1532 http://dx.doi.org/10.1002/esp.3738 Volltext http://onlinelibrary.wiley.com/doi/10.1002/esp.3738/abstract http://search.proquest.com/docview/1712387192 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO AR 40 2015 11 1524-1532 |
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10.1002/esp.3738 doi PQ20160617 (DE-627)OLC1962506800 (DE-599)GBVOLC1962506800 (PRQ)g2308-b76a07f2e1793d4b9b5935980d4e5931596aeb7c37aff7f869a84d2a75b087c43 (KEY)0004410520150000040001101524ordersofmagnitudeincreaseinsoilerosionassociatedwi DE-627 ger DE-627 rakwb eng 910 DNB Oliveira, Paulo Tarso S verfasserin aut Orders of magnitude increase in soil erosion associated with land use change from native to cultivated vegetation in a Brazilian savannah environment 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The Brazilian savanna (cerrado) is a large and important economic and environmental region that is experiencing significant loss of its natural landscapes due to pressures of food and energy production, which in turn has caused large increases in soil erosion. However the magnitude of the soil erosion increases in this region is not well understood, in part because scientific studies of surface runoff and soil erosion are scarce or nonexistent in the cerrado as well as in other savannahs of the world. To understand the effects of deforestation we assessed natural rainfall‐driven rates of runoff and soil erosion on an undisturbed tropical woodland classified as ‘cerrado sensu stricto denso’ and bare soil. Results were evaluated and quantified in the context of the cover and management factor (C‐factor) of the Universal Soil Loss Equation (USLE). Replicated data on precipitation, runoff, and soil loss on plots (5 × 20 m) under undisturbed cerrado and bare soil were collected for 77 erosive storms that occurred over 3 years (2012 through 2014). C‐factor was computed annually using values of rainfall erosivity and soil loss rate. We found an average runoff coefficient of ~20% for the plots under bare soil and less than 1% under undisturbed cerrado. The mean annual soil losses in the plots under bare soil and cerrado were 12.4 t ha ‐1 yr ‐1 and 0.1 t ha ‐1 yr ‐1 , respectively. The erosivity‐weighted C‐factor for the undisturbed cerrado was 0.013. Surface runoff, soil loss and C‐factor were greatest in the summer and fall. Our results suggest that shifts in land use from the native to cultivated vegetation result in orders of magnitude increases in soil loss rates. These results provide benchmark values that will be useful to evaluate past and future land use changes using soil erosion models and have significance for undisturbed savanna regions worldwide. Copyright © 2015 John Wiley & Sons, Ltd. Nutzungsrecht: Copyright © 2015 John Wiley & Sons, Ltd. © COPYRIGHT 2015 Wiley Subscription Services, Inc. USLE deforestation infiltration soil and water conservation runoff Soil erosion Rain and rainfall Analysis Land use Nearing, Mark A oth Wendland, Edson oth Enthalten in Earth surface processes and landforms New York, NY [u.a.] : Wiley, 1981 40(2015), 11, Seite 1524-1532 (DE-627)130395609 (DE-600)602320-4 (DE-576)015897788 0197-9337 nnns volume:40 year:2015 number:11 pages:1524-1532 http://dx.doi.org/10.1002/esp.3738 Volltext http://onlinelibrary.wiley.com/doi/10.1002/esp.3738/abstract http://search.proquest.com/docview/1712387192 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO AR 40 2015 11 1524-1532 |
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However the magnitude of the soil erosion increases in this region is not well understood, in part because scientific studies of surface runoff and soil erosion are scarce or nonexistent in the cerrado as well as in other savannahs of the world. To understand the effects of deforestation we assessed natural rainfall‐driven rates of runoff and soil erosion on an undisturbed tropical woodland classified as ‘cerrado sensu stricto denso’ and bare soil. Results were evaluated and quantified in the context of the cover and management factor (C‐factor) of the Universal Soil Loss Equation (USLE). Replicated data on precipitation, runoff, and soil loss on plots (5 × 20 m) under undisturbed cerrado and bare soil were collected for 77 erosive storms that occurred over 3 years (2012 through 2014). C‐factor was computed annually using values of rainfall erosivity and soil loss rate. We found an average runoff coefficient of ~20% for the plots under bare soil and less than 1% under undisturbed cerrado. The mean annual soil losses in the plots under bare soil and cerrado were 12.4 t ha ‐1 yr ‐1 and 0.1 t ha ‐1 yr ‐1 , respectively. The erosivity‐weighted C‐factor for the undisturbed cerrado was 0.013. Surface runoff, soil loss and C‐factor were greatest in the summer and fall. Our results suggest that shifts in land use from the native to cultivated vegetation result in orders of magnitude increases in soil loss rates. These results provide benchmark values that will be useful to evaluate past and future land use changes using soil erosion models and have significance for undisturbed savanna regions worldwide. 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orders of magnitude increase in soil erosion associated with land use change from native to cultivated vegetation in a brazilian savannah environment |
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Orders of magnitude increase in soil erosion associated with land use change from native to cultivated vegetation in a Brazilian savannah environment |
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The Brazilian savanna (cerrado) is a large and important economic and environmental region that is experiencing significant loss of its natural landscapes due to pressures of food and energy production, which in turn has caused large increases in soil erosion. However the magnitude of the soil erosion increases in this region is not well understood, in part because scientific studies of surface runoff and soil erosion are scarce or nonexistent in the cerrado as well as in other savannahs of the world. To understand the effects of deforestation we assessed natural rainfall‐driven rates of runoff and soil erosion on an undisturbed tropical woodland classified as ‘cerrado sensu stricto denso’ and bare soil. Results were evaluated and quantified in the context of the cover and management factor (C‐factor) of the Universal Soil Loss Equation (USLE). Replicated data on precipitation, runoff, and soil loss on plots (5 × 20 m) under undisturbed cerrado and bare soil were collected for 77 erosive storms that occurred over 3 years (2012 through 2014). C‐factor was computed annually using values of rainfall erosivity and soil loss rate. We found an average runoff coefficient of ~20% for the plots under bare soil and less than 1% under undisturbed cerrado. The mean annual soil losses in the plots under bare soil and cerrado were 12.4 t ha ‐1 yr ‐1 and 0.1 t ha ‐1 yr ‐1 , respectively. The erosivity‐weighted C‐factor for the undisturbed cerrado was 0.013. Surface runoff, soil loss and C‐factor were greatest in the summer and fall. Our results suggest that shifts in land use from the native to cultivated vegetation result in orders of magnitude increases in soil loss rates. These results provide benchmark values that will be useful to evaluate past and future land use changes using soil erosion models and have significance for undisturbed savanna regions worldwide. Copyright © 2015 John Wiley & Sons, Ltd. |
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The Brazilian savanna (cerrado) is a large and important economic and environmental region that is experiencing significant loss of its natural landscapes due to pressures of food and energy production, which in turn has caused large increases in soil erosion. However the magnitude of the soil erosion increases in this region is not well understood, in part because scientific studies of surface runoff and soil erosion are scarce or nonexistent in the cerrado as well as in other savannahs of the world. To understand the effects of deforestation we assessed natural rainfall‐driven rates of runoff and soil erosion on an undisturbed tropical woodland classified as ‘cerrado sensu stricto denso’ and bare soil. Results were evaluated and quantified in the context of the cover and management factor (C‐factor) of the Universal Soil Loss Equation (USLE). Replicated data on precipitation, runoff, and soil loss on plots (5 × 20 m) under undisturbed cerrado and bare soil were collected for 77 erosive storms that occurred over 3 years (2012 through 2014). C‐factor was computed annually using values of rainfall erosivity and soil loss rate. We found an average runoff coefficient of ~20% for the plots under bare soil and less than 1% under undisturbed cerrado. The mean annual soil losses in the plots under bare soil and cerrado were 12.4 t ha ‐1 yr ‐1 and 0.1 t ha ‐1 yr ‐1 , respectively. The erosivity‐weighted C‐factor for the undisturbed cerrado was 0.013. Surface runoff, soil loss and C‐factor were greatest in the summer and fall. Our results suggest that shifts in land use from the native to cultivated vegetation result in orders of magnitude increases in soil loss rates. These results provide benchmark values that will be useful to evaluate past and future land use changes using soil erosion models and have significance for undisturbed savanna regions worldwide. Copyright © 2015 John Wiley & Sons, Ltd. |
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The Brazilian savanna (cerrado) is a large and important economic and environmental region that is experiencing significant loss of its natural landscapes due to pressures of food and energy production, which in turn has caused large increases in soil erosion. However the magnitude of the soil erosion increases in this region is not well understood, in part because scientific studies of surface runoff and soil erosion are scarce or nonexistent in the cerrado as well as in other savannahs of the world. To understand the effects of deforestation we assessed natural rainfall‐driven rates of runoff and soil erosion on an undisturbed tropical woodland classified as ‘cerrado sensu stricto denso’ and bare soil. Results were evaluated and quantified in the context of the cover and management factor (C‐factor) of the Universal Soil Loss Equation (USLE). Replicated data on precipitation, runoff, and soil loss on plots (5 × 20 m) under undisturbed cerrado and bare soil were collected for 77 erosive storms that occurred over 3 years (2012 through 2014). C‐factor was computed annually using values of rainfall erosivity and soil loss rate. We found an average runoff coefficient of ~20% for the plots under bare soil and less than 1% under undisturbed cerrado. The mean annual soil losses in the plots under bare soil and cerrado were 12.4 t ha ‐1 yr ‐1 and 0.1 t ha ‐1 yr ‐1 , respectively. The erosivity‐weighted C‐factor for the undisturbed cerrado was 0.013. Surface runoff, soil loss and C‐factor were greatest in the summer and fall. Our results suggest that shifts in land use from the native to cultivated vegetation result in orders of magnitude increases in soil loss rates. These results provide benchmark values that will be useful to evaluate past and future land use changes using soil erosion models and have significance for undisturbed savanna regions worldwide. Copyright © 2015 John Wiley & Sons, Ltd. |
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