Estimativa da perda de solo por erosão hídrica na bacia hidrográfica do rio Jauru/MT

Neves, Sandra Mara Alves da Silva; Motinho, Maria Cândida; Neves, Ronaldo Jósé; Soares, Eliezer Rangel Campos

doi:10.1590/s1982-45132011000300005

Cited by 13 publications

(15 citation statements)

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“…, studying Neosols in the municipality of São Vicente, Rio Grande do Norte State, observed that the clay content increased in subsurface and that this increase is probably due to the smaller size of the surface clay particles, which are easily transported by water and deposited in lower landscape locations. Neves et al (2011), conducting research on soil erosion losses in the Jaruru river basin in the State of Mato Grosso, observed that the Quartzarenic Neosols present a high risk of soil loss, which is due to slope and ramp length, accelerating the erosive process and, consequently, the soil degradation. Note.…”

Section: Resultsmentioning

confidence: 99%

Ethnopedological Studies to Characterize Neosols at the Brazilian Semiarid Region

Silva¹,

Portela²,

Dias³

et al. 2019

JAS

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The ethnopedological approach to soil characterization presents great challenges, since the understanding of the systems occurs through the knowledge acquired by the man in his coexistence with agroecosystems. The aim of the present research was to characterize the agricultural soils through morphological, physical and chemical analysis, using ethnopedological studies in the ‘Santa Agostinha’ Settlement Project, Caraúbas-RN, Brazil. Five areas were defined for study in the soil/landscape relation: i) area with cashew cultivation; ii) area of pasture; iii) area of crops in consortium; iv) agroforestry; and v) preserved forest, used as the reference. Participatory workshops, exchanges and classifications (from the locals and formal) were carried out with the analysis of the morphological, physical and chemical attributes of the studied soils in the layers of 0.00-0.10, 0.10-0.20 and 0.20-0.30 m. The results of the ethicist classification, based on the attributes evaluation were: Quartzarenic latosol NEOSOL (cashew area); Regolitic euthrofic NEOSOL (pasture area); Ortic quartzarenic fragiudult NEOSOL (intercropping area); typical quartzarenic ortic NEOSOL (agroforestry area and typical hydromorphic quartzarenic NEOSOL that presented a close relation with the emicist classification (from the local people). The observation of the different soil types in the landscape, due to the stratification of the environments, allowed the growers to identify characteristics associated with soil potentials and restrictions and, consequently, the correct management to be adopted. The experiences of local growers in the participatory workshops provided an exchange of popular and scientific knowledge, as well as new perspectives of coexistence with the semiarid.

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Section: Resultsmentioning

confidence: 99%

Ethnopedological Studies to Characterize Neosols at the Brazilian Semiarid Region

Silva¹,

Portela²,

Dias³

et al. 2019

JAS

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“…Thus, these events represent almost the entire erosion of the areas. Neves et al (2011) evaluated watersheds in southwestern Mato Grosso State and found 78% of soil losses in pasture areas over a Red Argisol. Almeida et al (2012) evaluated soil loss in the Brazilian semiarid region and found reduction of 68% in runoff after ten years of fallow, compared to a degraded area.…”

Section: Wp -Water Precipitation; Ep -Effective Precipitationmentioning

confidence: 99%

“…Water erosion is the result of the interaction of precipitations, soil, topography, soil coverage and conservation practices (WISCHMEIER; SMITH, 1978), and is an emerging subject among researchers, since it interferes directly on agricultural productivity and causes economic and environmental damages (KANG et al, 2001;LOBATO et al, 2009;NEVES et al, 2011;TELLES et al, 2011). The quantification of water erosion and information on the physical processes related to it is crucial for develop means to maximize the use of the water resources available and avoid the negative effects of soil erosion (SILVA et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Effective Preciptation, Soil Loss and Plant Cover Systems in the Caatinga Biome, Brazil

et al. 2016

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-The objective of this work was to evaluate the influence of anthropic activities on the effective precipitation (eP) and soil loss in watersheds under different land uses in a tropical dry forest region. The experimental area was located in the central part of the State of Ceará, Brazil. The land uses evaluated were: fallow Caatinga (FC), thinned Caatinga (TC) and deforested Caatinga followed by a burning procedure and pasture cultivation (DBP). The areas were monitored in the rainy season (January to May, 2010), when 57 natural rainfalls occurred, totaling 941 mm of precipitation. The eP and sediment productions were quantified by the sum of all occurrences during the study period, and the soil loss was represented by suspended and dragged sediments. The eP was 15.13 mm and sediment produced was 167.81 kg ha -1 in FC conditions. The eP values was smaller (11.28 mm) in the watershed with TC, which had soil loss sum of 42.04 kg ha -1 . The largest annual eP was found in the DBP area, with 112.88 mm yr -1 of accumulated water depth, which also showed the greater annual soil loss (3114.97 kg ha -1). The greatest interference of plant cover in the two variables evaluated occurred in the first precipitation events, when the plants were not yet fully developed.Keywords: Water erosion. Semiarid region. Surface runoff. PRECIPITAÇÃO EFETIVA E PERDAS DE SOLO EM DIFERENTES SISTEMAS DE COBERTURAVEGETAL NO BIOMA CAATINGA RESUMO -O presente estudo objetivou investigar a influência da ação antrópica na precipitação efetiva (Pe) e nas perdas de solo em microbacias submetidas a diferentes usos do solo em região de floresta tropical seca. A área experimental está localizada na parte central do estado do Ceará, Brasil. Os usos do solo investigados foram: Caatinga em Pousio (CP), Caatinga Raleada (CR) e manejo de Desmatamento da Caatinga seguido de Queima e cultivo de Pastagem (DQP). O monitoramento foi realizado na estação chuvosa (janeiro a maio) de 2010, com uma ocorrência de 57 eventos naturais de chuva, totalizando 941 mm precipitados. Na quantificação da Pe e produção de sedimentos foi feito um somatório para todos os eventos ocorridos no período de estudo e nas perdas de solo consideraram-se os sedimentos em suspensão e em arraste. Em condições de pousio, a Pe e a produção de sedimentos foram de 15,13 mm e 167,81 kg ha -1 respectivamente. Os menores valores de Pe (11,28 mm) ocorreram na microbacia cujo uso da terra era o CR, cujas perdas de solo totalizaram 42,04 kg ha -1 . No uso da terra DQP foi registrada a maior Pe anual com 112,88 mm ano -1 de lâmina escoada acumulada, bem como as maiores perdas de solo anual (3.114,97 kg ha -1 ). A maior inferência da cobertura vegetal nos dois processos investigados ocorreu para os primeiros eventos, quando o estrato herbáceo ainda não estava desenvolvido.Palavras-Chave: Erosão hídrica. Semiárido. Escoamento superficial.

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“…This estimates the average soil loss for long periods of time caused by laminar water erosion and is a practical model because it uses parameters that are easy to obtain. This indirect model is the most currently employed in this context, and it is observed in various scientific research studies such as CORREA et al (2007), AVANZI et al (2008), SILVA et al (2010), NEVES et al (2011), ZHANG et al (2011) and MENESES (2014.…”

Section: Introductionmentioning

confidence: 99%

Soil Losses in the Cedro River Basin/MG Based on the Sensor TM/LANDSAT-5 Images

Vieira¹,

Silva²,

Nascimento³

et al. 2016

NATIVA

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Changes in land use and land coverage can cause degradation due to soil loss from the drag of particles, ultimately leading to siltation of rivers and irreversible damage. Thus, the objective of this study was to determine the soil loss in the basin of the Cedro river, north of Minas Gerais, Brazil, using the Universal Soil Loss Equation (USLE) and time series of LANDSAT-5/TM satellite images. The methodology included the acquisition and classification of LANDSAT-5/TM images for the years 1984, 1990, 2000 and 2011. Maps corresponding to the following parameters were generated: erosivity; erodibility; slope degree; slope length, map of soil use and occupation and conservation practices. The final soil loss map was drawn up in the environment LEGAL/SPRING/ version 5.1.8 through map algebra. Soil losses in the basin were moderate for all years in the case of areas with slight slopes and with good vegetation cover. In turn, soil loss was very high in the case of areas with slopes above 20% and with little vegetation cover. Soil loss for the year 1984 was lower, while major losses were recorded for the years 1990 and 2000.

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Estimativa da perda de solo por erosão hídrica na bacia hidrográfica do rio Jauru/MT

Cited by 13 publications

References 1 publication

Ethnopedological Studies to Characterize Neosols at the Brazilian Semiarid Region

Ethnopedological Studies to Characterize Neosols at the Brazilian Semiarid Region

Effective Preciptation, Soil Loss and Plant Cover Systems in the Caatinga Biome, Brazil

Soil Losses in the Cedro River Basin/MG Based on the Sensor TM/LANDSAT-5 Images

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