Time dependence of hydraulic parameters estimation from transient analysis of mini disc infiltrometer measurements

Naik, Aparimita Priyadarshini; Pekkat, Sreeja

doi:10.1111/ejss.13228

Cited by 4 publications

(2 citation statements)

References 34 publications

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“…Several researchers have also reported that the estimation of the coefficients of Equation ( 6) is affected by the experimental duration, which will also affect the estimation of S and K [21,33]. Latorre et al [6] reported that the DL method is valid only for short to medium times.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Soil Hydraulic Properties Estimated by Steady- and Unsteady-Flow Methods in the Laboratory

Koka,

Kargas,

Londra

2023

Water

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In this study, soil hydraulic conductivity (K) and soil sorptivity (S) values estimated by applying various steady- and unsteady-flow methods using cumulative infiltration data of three disturbed soils (sandy loam, loam, clay) obtained from a disc infiltrometer in the laboratory at various negative pressure heads were compared. The steady-flow methods used were those of Ankeny et al. and Reynolds and Elrick as well as Logsdon and Jaynes, while the unsteady-flow methods were those of Haverkamp et al. (two-term (2T) and three-term (3T) infiltration equations) and Zhang. The method of White et al., which is a steady-flow method but also uses unsteady-flow infiltration data, was also examined. The results showed that the three steady-flow methods, as well as the Zhang equation, for values of the van Genuchten coefficient n > 1.35, tend to give similar values of K. The 2T infiltration equation with β = 0.6 provided hydraulic conductivity values greater than those estimated by the steady-state methods but gave negative K values in some cases. The values of the coefficients C1 and C2 of the 2T equation were affected by the infiltration time. The coefficient C1 increased while C2 decreased with increasing time when the cumulative linearization method (CL) was applied, but the change in C1 tended to be smaller than that in C2. The inverse solution of the 3T equation using the Excel Solver application for β = 0.75 and β = 1.6, when positive values of K were obtained, approached better the K values estimated by the steady-flow methods compared with those estimated using β = 0.6. Regarding the estimation of S from the unsteady-flow equations (2T, 3T, Zhang), comparable S values were obtained by all equations. The differences between the S values of the various methods are smaller compared to those of K, and S is less affected than K in terms of time. The problem of negative estimates of K might be attributed to the fact that the soils used in this study are classified as soils situated in the domain of lateral capillarity or are not completely homogeneous or soil compaction is observed at some depth. In the case where the soils are not completely homogeneous, the Sequential Infiltration Analysis (SIA) method with β = 0.75 corresponding to the soil types studied was proved to be effective in estimating K values.

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Section: Introductionmentioning

confidence: 99%

Comparison of Soil Hydraulic Properties Estimated by Steady- and Unsteady-Flow Methods in the Laboratory

Koka,

Kargas,

Londra

2023

Water

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“…Existem vários métodos de determinação da infiltração de água no solo. Podese utilizar o infiltrômetro de anéis concêntricos (BRANDÃO et al, 2012, MINOSSO et al, 2017, infiltrômetro de MiniDisk (ALAGNA et al, 2019;NAIK;PEKKAT, 2022) e simuladores de chuva (BRANDÃO et al, 2012).…”

Section: Infiltração De áGua No Solounclassified

Efeito da reabilitação de áreas de mineração de bauxita na infiltração e na repelência do solo à água

Cenachi

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O Brasil, como o terceiro maior produtor de bauxita do mundo, ocupa uma posição de destaque na indústria de mineração. No entanto, surgem questionamentos da sociedade sobre os potenciais impactos negativos da mineração nos processos hidrológicos, dado o considerável revolvimento do solo envolvido nessa atividade. O objetivo principal deste estudo é avaliar os efeitos da reabilitação de áreas mineradas de bauxita pela Companhia Brasileira de Alumínio (CBA) na infiltração e na repelência do solo em relação à água. Foram selecionadas seis áreas, sendo três delas áreas reabilitadas (área 0610, 0630 e 0123), e as outras três áreas foram designadas como áreas testemunhas. Essas áreas estão localizadas no município de São Sebastião da Vargem Alegre, na região da Zona da Mata mineira, no Brasil. Nessas áreas, foram coletadas informações relacionadas à infiltração e à repelência do solo usando um infiltrômetro MiniDisk, bem como dados sobre a resistência mecânica do solo à penetração, utilizando um Penetrolog. Para a análise estatística dos dados, foi aplicado o teste Mann-Whitney, utilizando o software RStudio 4.2.3. Também foi calculada a correlação de Spearman e realizada uma análise de componentes principais (PCA). Na área reabilitada, observou-se uma capacidade de infiltração (Ci) e uma velocidade de infiltração (Vi) substancialmente maior, atingindo valores de 309 mm/h e 298 mm/h, respectivamente. Em contraste, na área testemunha, esses valores foram significativamente menores, registrando 148 mm/h para Ci e 129 mm/h para Vi. Essas diferenças entre a área reabilitada e testemunha foi estatisticamente significantes (p≤0,05). Na área reabilitada, a repelência foi de 1,48%, enquanto na área testemunha, esse valor alcançou 6,22%. Essa divergência também foi estatisticamente significativa (p-valor = 0,012). A resistência mecânica do solo à penetração (RMP) apresentou uma profundidade média de 42 cm na área reabilitada, enquanto na área testemunha essa profundidade foi de 26 cm. Essa maior resistência na área reabilitada pode ser resultado da introdução de material grosseiro no perfil do solo durante o processo de reabilitação. Nas análises de correlação de Spearman, foi observado que na área testemunha, as correlações entre Ci e Vi e R foram de -0,37, enquanto na área reabilitada, essas correlações se mostraram mais acentuadas, com valores de -0,73. Concluiu-se que a área reabilitada apresentou as melhores condições hidrológicas, com maiores valores de Vi e Ci, consequentemente menor R em comparação com a área testemunha. A área reabilitada apresentou maior compactação do solo. A correlação de Spearman confirmou a relação inversa entre as variáveis hidrológicas e a repelência. Palavras-chave: Hidrologia florestal. Manejo de bacias hidrográficas. Variáveis hidrológicas.

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Conducting an in situ evaluation of erodibility in a Mediterranean semi-arid and conventional vineyard in Granada province (Southern Spain) through rainfall simulation experiments

Ortega,

Cambronero,

Alcarria Salas

et al. 2024

Euro-Mediterr J Environ Integr

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Vineyards in Europe has been fundamental for food, drink and cosmetic production, and job creation; however, in recent decades due to increased cultivation intensity, numerous negative consequences, including erosion, have been observed. Erodibility or susceptibility to erosion is a little-studied parameter in vineyards but is crucial for analyzing the vulnerability of this crop. Therefore, in this research, a small portable rainfall simulator was used as a useful tool for assessing erodibility, combined with other methods such as soil analyses or infiltration measurements in a semi-arid vineyard located in the Granada province (Spain) considering 20 different hotspots at diverse hillslope positions along the inter-rows and close to the traffic roads. The experiments were conducted in spring 2022 under dry soil conditions. Our results display susceptibility to erosion, particularly on steeper parts such as the shoulder and backslopes. In these areas, runoff gained momentum, carrying a significant sediment load, diminishing the effectiveness of stone cover, and occasionally leading to its removal, especially near the roads. Nevertheless, it is observed that increased roughness plays a mitigating role by slowing down runoff. Using linear correlation analysis and Spearman rank coefficient, we observed this effect is linked to factors such as stoniness, vegetation, and moderate tillage. Conversely, in the flatter zones, primarily in lower areas, reduced runoff and delayed onset are primarily influenced by factors such as roughness, type of cover, material composition, and organic matter content. We concluded that this study case can demonstrate that erodibility in vineyards can shed light as an extra parameter to inform farmers, rural inhabitants, and policymakers about the extreme problem of the vulnerable soils of vineyards.

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Time dependence of hydraulic parameters estimation from transient analysis of mini disc infiltrometer measurements

Cited by 4 publications

References 34 publications

Comparison of Soil Hydraulic Properties Estimated by Steady- and Unsteady-Flow Methods in the Laboratory

Comparison of Soil Hydraulic Properties Estimated by Steady- and Unsteady-Flow Methods in the Laboratory

Efeito da reabilitação de áreas de mineração de bauxita na infiltração e na repelência do solo à água

Conducting an in situ evaluation of erodibility in a Mediterranean semi-arid and conventional vineyard in Granada province (Southern Spain) through rainfall simulation experiments

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