Using Geotechnology to Estimate Annual Soil Loss Rate in the Brazilian Cerrado

Gomes, Luciene; Simões, Silvio Jorge Coelho; Forti, M. C.; Ometto, Jean Pierre Henry Balbaud; Nora, Elói Lennon Dalla

doi:10.4236/jgis.2017.94026

Cited by 6 publications

(7 citation statements)

References 41 publications

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“…The soil erodibility (K) values in the Santa Catarina southern region (Figure S4) determined from the sand, clay, silt, and organic carbon proportions using the SoilGrids data (ISRIC, 2021), were compatible with other studies developed in Brazil, such as (GOMES et al, 2017) for similar soil classes. The soils of the region have maximum proportions of 59% clay, 51% silt, 47% sand, and 14% organic carbon.…”

Section: Soil Erodibility Factorsupporting

confidence: 85%

“…For the land use and land cover (C) and conservation practices (P) factors, the annual LULC maps from the MapBiomas Brazil Project were used (MAPBIOMAS, 2021). The conjugated factors (CP) values were obtained from several bibliographical references (GIOVANINI JUNIOR, 2019;GOMES et al, 2017;LOPES;SOUZA;RIBEIRO, 2009;MATOS, 2015;SILVA et al, 2020). 5.…”

Section: Study Areamentioning

confidence: 99%

“…At the same time, conservation practices (P) are related to actions to prevent or reduce soil erosion, which is an essential agent in soil loss (BAMUTAZE et al, 2021). Usually they are combined into one (CP) factor (GIOVANINI JUNIOR, 2019;GOMES et al, 2017;LOPES;SOUZA;RIBEIRO, 2009;MATOS, 2015;SILVA et al, 2020).…”

Section: Land Use and Land Cover (C) And Conservation Practices (P) Factorsmentioning

confidence: 99%

“…The CP factor was obtained according to the classes available on the LULC maps of MapBiomas for 1985, 1995, 2005(MAPBIOMAS, 2021. In addition, their values were extracted from the literature (GIOVANINI JUNIOR, 2019;GOMES et al, 2017;LOPES;SOUZA;RIBEIRO, 2009;MATOS, 2015;SILVA et al, 2020). For all LULC classes found in Santa Catarina southern region, a CP factor (Table 2) was used to elaborate the maps for 1985,1995,2005,2015, and 2019 (Figure S6).…”

Section: Land Use and Land Cover (C) And Conservation Practices (P) Factorsmentioning

confidence: 99%

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Geodetic Landmarks Soil Loss Susceptibility Using RUSLE and Climate Change Scenarios

Silveira

Nascimento

Casagrande

et al. 2021

Preprint

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Geodetic landmarks (GLs) are essential for obtaining the precise height, horizontal coordinates, and the Earth's gravity field. Once physically implanted on the surface, they are susceptible to movement and displacement. This study aims to assess the soil susceptibility of GLs for past and future scenarios through the Revised Soil Loss Equation (RUSLE). So the soil loss estimations were made for the GLs in Brazil's southern Santa Catarina region. Our results showed average soil loss values, reaching 175915 t/ha/year, while the GLs were 2109 t/ha/year. There was an increase in GLs in the null class, mainly caused by urban infrastructure increase. At the same time, a decrease occurred in the low, very severe, severe, and moderate classes. In contrast, for future scenarios, an increase in the GLs average soil loss was found until 2100. However, it is essential to highlight that the most relevant increase occurred in the 2021-2040 period. After that, some scenarios as ssp126 remained stable, ssp245 and ssp370 slightly increased while ssp585 increased the most, reaching a maximum value of 2364 t/ha/year until 2100. There are a stability in the null class with a little decreasing in the low and moderate classes. In severe and very severe classes, there are a increase in the almost all scenarios. This behavior take account only the rainfall, thus for a better analysis, would be necessary the forecast of land cover change. Therefore, the climate simulations can be used to understand the effects of climate change on soil erosion to support decision-making.

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Section: Soil Erodibility Factorsupporting

confidence: 85%

Section: Study Areamentioning

confidence: 99%

Section: Land Use and Land Cover (C) And Conservation Practices (P) Factorsmentioning

confidence: 99%

Section: Land Use and Land Cover (C) And Conservation Practices (P) Factorsmentioning

confidence: 99%

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Geodetic Landmarks Soil Loss Susceptibility Using RUSLE and Climate Change Scenarios

Silveira

Nascimento

Casagrande

et al. 2021

Preprint

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“…Practices characterized by the P-factor include strip-cropping and terracing which are not applicable to the most forested region [26]. Since the soil conservation practices for each system cannot be known for the entire Brazilian Cerrado, where an area of about 880,000 km 2 is occupied by farmland, the P-factor values were determined according to [85], and applied as in [86][87][88], which calculated this factor based on slope radian (θ). Thus, the P-factor was calculated to be 0.6 for 0 ≤ θ ≤ 5%, 0.69947 − 0.08991 * θ + 0.01184 * θ 2 − 0.00035 * θ 3 for 5% < θ ≤ 20% and 1.0 for θ > 20%.…”

Section: Cover and Management Factor (C)mentioning

confidence: 99%

Agricultural Expansion in the Brazilian Cerrado: Increased Soil and Nutrient Losses and Decreased Agricultural Productivity

Gomes

Simões

Nora

et al. 2019

Land

Self Cite

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While food and nutrition security are issues that national and international organizations are tackling, one of the central problems often overlooked is the essential role of soils in providing nutritious food. Soils are the base for food production and food security. However, the majority of soils are in fair and poor conditions, with the most significant threats being erosion and loss of nutrients. In this study, we estimate the potential of soil loss, agricultural productivity loss, and nutrient loss for Brazil’s most important agricultural region, the Brazilian Cerrado, for the years 2000 and 2012. For this, we applied the Revised Universal Soil Loss Equation (RUSLE) model integrated with a geographical information system (GIS) to estimate annual soil loss rate and agricultural productivity loss, and used total nitrogen and total phosphorus in soil to estimate the annual nutrient loss rate caused by soil loss. All model factors and data were obtained from the literature. The results show that agricultural expansion in the Brazilian Cerrado is increasing the area of severe erosion, occasioning agricultural productivity decrease and soil nutrient depletion. The annual soil loss rate increased from 10.4 (2000) to 12.0 Mg ha−1 yr−1 (2012). Agricultural productivity loss occurred in more than 3 million hectares of crops and silviculture in 2000 and in more than 5.5 million hectares in 2012. Severely eroded areas lost between 13.1 and 25.9 times more nutrients than areas with low and moderate soil loss rates. These findings show that government policy should be directed to ensure the sustainable use of soils, mainly in agriculturally consolidated regions of the Brazilian Cerrado.

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On‐ and off‐site erosion impacts of restoration measures in a tropical karst watershed

Fonseca

Chaves

Uagoda

2023

Earth Surf Processes Landf

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Karst areas are vulnerable landscapes which, if unprotected, could be permanently degraded. To bridge the gap existing in the reduction of on‐ and off‐site impact of restored tropical karst areas, this study was carried out in a 3.5 ha karst watershed of the Brazilian savanna (Cerrado). Precipitation, surface runoff, and soil loss were measured in representative runoff plots (22.1 × 1.84 m), used to assess the watershed erosion and sediment yield to a downstream sinkhole. The study was carried out during three hydrologic years, between September 2018 and May 2020. The predominant soils in the watershed were Lithic entisol and Quartzsamment, and the original land covers were natural savanna, seasonal forest, and degraded pastureland (Andropogon gayanus). The latter was restored with native savanna species, in the lower part of the watershed, and with a reformed pastureland, in the upper part. The USLE rainfall erosivity (R), soil erodibility (K), and soil cover (C) factors, runoff, soil loss, and the original soil and sediment textures were obtained from the runoff plots. The watershed soil loss and sediment yield were obtained by the USLE and GIS. Precipitation and rainfall erosivity ranged from 936 to 1223 mm, and from 6694 to 7746 MJ mm ha−1 h−1, in the period, respectively. Although the ecological watershed restoration reduced mean soil loss from 11.6 to 5.8 Mg ha−1 year−1, and sediment yield from 29.2 to 14.6 Mg year−1, on‐ and off‐site soil loss tolerances were still exceeded in 29 and 61% of the basin area, respectively. Ecological restoration also reduced the sand and clay content of the sediment entering the underground caves and river downstream, contributing to their hydrologic sustainability.

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Using Geotechnology to Estimate Annual Soil Loss Rate in the Brazilian Cerrado

Cited by 6 publications

References 41 publications

Geodetic Landmarks Soil Loss Susceptibility Using RUSLE and Climate Change Scenarios

Geodetic Landmarks Soil Loss Susceptibility Using RUSLE and Climate Change Scenarios

Agricultural Expansion in the Brazilian Cerrado: Increased Soil and Nutrient Losses and Decreased Agricultural Productivity

On‐ and off‐site erosion impacts of restoration measures in a tropical karst watershed

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