Evaluation of local groundwater vulnerability based on DRASTIC index method in Lahore, Pakistan

Muhammad, Akhtar Malik; Tang, Zhonghua; Dawood, Ammar Salman; Bailey, Earl

doi:10.1016/j.gi.2015.04.003

Cited by 83 publications

(40 citation statements)

References 32 publications

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“…Maior saturação do solo permite diversas reações químicas, tais como biodegradação, filtragem e difusão (Muhammad et al, 2015). Tal situação promove a menor concentração de tebuthiuron na água subterrânea.…”

Section: Resultsunclassified

“…Modelos matemáticos implementados em simuladores foram desenvolvidos e empregados nos estudos do comportamento ambiental de defensivos agrícolas, como CMLS (Chemical Movement in Layered Soils) (Nofziger & Hornsby, 1987) e Pearl (Tiktak et al, 2000). O software Araquá (Spadotto et al, 2010) foi desenvolvido para estimar a concentração pontual de um defensivo agrícola em águas subterrâneas e superficiais em condições brasileiras de clima e solo.…”

Section: Introductionunclassified

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Variabilidade espacial do risco de contaminação de águas subterrâneas por tebuthiuron em área de cana-de-açúcar

Spadotto

Sartori

Zimback

2016

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar o risco de contaminação da água subterrânea por tebuthiuron, por meio da modelagem espacial, em área de cultivo de cana-de-açúcar, no Município de São Manuel, no Estado de São Paulo. Utilizou-se o modelo Araquá, para gerar estimativas pontuais da concentração, tendo-se considerado simulações no tocante às profundidades de 100 e 200 cm do lençol freático e lâminas de irrigação de 0 e 2.500 mm. Como as estimativas de concentração de tebuthiuron não apresentaram dependência espacial, os mapas temáticos de risco de contaminação de águas subterrâneas foram obtidos pelo método de interpolação pelo inverso da distância. Ao se considerar todas as simulações, conclui-se que não haveria contaminação da água subterrânea por tebuthiuron, nas duas profundidades do lençol freático, com ou sem irrigação. A interpolação das estimativas das concentrações de tebuthiuron na água subterrânea proporciona a espacialização e a rápida visualização das áreas de maior risco de contaminação.Termos para indexação: geoestatística, herbicida, lençol freático, mapas de risco, simulação. Spatial variability of groundwater contamination risk by tebuthiuron in sugarcane areaAbstract -The objective of this work was to evaluate the groundwater contamination risk by tebuthiuron in a sugarcane area, through spatial modeling, in the municipality of São Manuel, in the state of São Paulo, Brazil. The Araquá model was used to generate specific concentration estimates, considering simulations regarding different water table depths (100 and 200 cm) and irrigation depths (0 and 2,500 mm). As the estimated concentrations of tebuthiuron did not show spatial dependence, the thematic maps of risk of groundwater contamination were obtained through the method of interpolation by the inverse distance. Considering all the simulations, it can be concluded that there would be no groundwater contamination by tebuthiuron at the two depths of the water table, with or without irrigation. The interpolation of the estimated concentrations of tebuthiuron in groundwater provides the spatialization and a quick view of the areas with higher contamination risk.Index terms: geostatistics, herbicide, water table, risk maps, simulation. IntroduçãoO cultivo da cana-de-açúcar é uma das mais importantes atividades econômicas do Brasil em virtude da sua alta eficiência e competitividade, resultando em produtos como açúcar, álcool, combustíveis e até mesmo uso do bagaço para geração de energia (Silveira et al., 2014).Um dos problemas de seu cultivo, no Brasil, está relacionado com a interferência das plantas daninhas, para as quais o método empregado para o controle é a aplicação de herbicidas (Silva et al., 2015). O tebuthiuron é um herbicida residual amplamente utilizado nos canaviais, no sistema tradicional, em aplicações de pré-emergência, para controle das principais espécies anuais infestantes da cultura (Tofoli et al., 2009).No entanto, os defensivos agrícolas podem provocar efeitos prejudiciais ao meio ambiente, além de representar...

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Section: Resultsunclassified

Section: Introductionunclassified

Variabilidade espacial do risco de contaminação de águas subterrâneas por tebuthiuron em área de cana-de-açúcar

Spadotto

Sartori

Zimback

2016

Pesq. agropec. bras.

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“…The units having clay and loam are less vulnerable as they do not contain much of the water in the vadose zone. However, gravel, sandy and limestone areas contain groundwater and hence are vulnerable (Muhammad, 2015). They have been assigned a rating from 1 to 9 according to their properties.…”

Section: Methodsmentioning

confidence: 99%

Drastic method and correlation with chromium level due to tannery industry in Ranipet area groundwater vulnerability assessment, Vellore district, Tamilnadu, India

Ambiga¹

2017

Appl Ecol Env Res

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Abstract.The main aim of this study is to evaluate the groundwater assessment and pollution by using the DRASTIC method and the correlation between the chromium strength present in and around Ranipet areas. The present study is to determine the vulnerable zone for groundwater pollution by integrating hydrogeological layers in GIS environment. Thirty five groundwater samples were collected from the study area and analyzed in the laboratory for physico-chemical parameters and heavy metals like chromium during 2012. DRASTIC means depth to water table, recharge rate, aquifer media, soil permeability, topography, the impact of the vadose zone, and hydraulic conductivity and this can be incorporated in the DRASTIC model using GIS techniques. In the model has vulnerability index value between 128-166 being high and value between 166-199 being very high whereas the chromium concentration between 0.035 mg/l to 0.5429 mg/l. The statistical study puts into proof a great positive correlation between vulnerability and application of the chromium in the groundwater. High chromium awareness is present in high contamination areas over and above in moderate polluted areas. The present model can be used for estimation and groundwater management.

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“…Specifi c vulnerability is the vulnerability of groundwater to a particular contaminant or group of contaminants. For specifi c vulnerability, specifi c physicochemical properties from contaminants are considered [6]. In recent years, specifi c vulnerability has been more widely used and is more meaningful than intrinsic vulnerability, because intrinsic vulnerability assessments only consider natural factors.…”

Section: Introductionmentioning

confidence: 99%

Optimizing the DRASTIC Method for Nitrate Pollution in Groundwater Vulnerability Assessments: a Case Study in China

He¹,

Li²,

Li³

et al. 2018

Pol. J. Environ. Stud.

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Groundwater vulnerability assessments, using DRASTIC, are important and useful tools for groundwater pollution prevention and control. The DRASTIC method, however, is not appropriate for accurate specifi c vulnerability assessments where nitrate concentrations are high. A new method has been developed that retains the basic structure of DRASTIC while adding or subtracting parameters, and modifying the parameter ratings and weightings. The resulting DRACILM model was used to assess vulnerability to nitrate pollution in the West Liaohe Plain and as a basis for vulnerability mapping. The accuracy, appropriateness, and reliability of the vulnerability mapping were analyzed using a group of integrated indicators, such as correlation, ANOVA F-statistics, and single-parameter sensitivity analysis. The correlation between vulnerability class and the concentration of NO 3 -N in the DRACILM model improved to 0.649, which was 40.6% higher than that obtained by DRASTIC. The ANOVA F-statistic was 27.71, which indicated a lower overlap between the mean values of nitrates in the different vulnerability classes. The single-parameter sensitivity analysis revealed that land use type exhibited the highest and hydraulic conductivity the lowest effective weighting values. The vulnerability maps by DRACILM model could assist planners and government decision-makers with preliminary investigations into planning water protection projects or establishing management scenarios for water resource quality.

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Evaluation of local groundwater vulnerability based on DRASTIC index method in Lahore, Pakistan

Cited by 83 publications

References 32 publications

Variabilidade espacial do risco de contaminação de águas subterrâneas por tebuthiuron em área de cana-de-açúcar

Variabilidade espacial do risco de contaminação de águas subterrâneas por tebuthiuron em área de cana-de-açúcar

Drastic method and correlation with chromium level due to tannery industry in Ranipet area groundwater vulnerability assessment, Vellore district, Tamilnadu, India

Optimizing the DRASTIC Method for Nitrate Pollution in Groundwater Vulnerability Assessments: a Case Study in China

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