DRASTIC: A System to Evaluate the Pollution Potential of Hydrogeologic Settings by Pesticides

Aller, Linda; Bennett, Truman; Lehr, Jay H.; Petty, Rebecca

doi:10.1021/bk-1986-0315.ch008

Cited by 791 publications

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“…Aquifer contamination depends on several factors and conditions and can be predicted using models such as DRASTIC (Aller et al 1987). Such models assume that bioavailability depends on soil texture, hydrological conditions, hydrogeological settings, and climatic conditions.…”

Section: Introductionmentioning

confidence: 99%

Effects of time, soil organic matter, and iron oxides on the relative retention and redistribution of lead, cadmium, and copper on soils

Diagboya

Olu-Owolabi

Adebowale

2015

Environ Sci Pollut Res

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In order to predict the bioavailability of toxic metals in soils undergoing degradation of organic matter (OM) and iron oxides (IOs), it is vital to understand the roles of these soil components in relation to metal retention and redistribution with time. In this present work, batch competitive sorptions of Pb(II), Cu(II), and Cd(II) were investigated between 1 and 90 days. Results showed that competition affected Cd(II) sorption more than Cu(II) and Pb(II). The sorption followed the trend Pb(II) >>Cu(II)>Cd(II), irrespective of aging, and this high preference for Pb(II) ions in soils reduced with time. Removal of OM led to reduction in distribution coefficient (K d ) values of ≈33 % for all cations within the first day. However, K d increased nearly 100 % after 7 days and over 1000 % after 90-day period. The enhanced K d values indicated that sorptions occurred on the long run on surfaces which were masked by OM. Removal of IO caused selective increases in the K d values, but this was dependent on the dominant soil constituent(s) in the absence of IO. The K d values of the IOdegraded samples nearly remained constant irrespective of aging indicating that sorptions on soil components other than the IO are nearly instantaneous while iron oxides played greater role than other constituents with time. Hence, in the soils studied, organic matter content determines the immediate relative metal retention while iron oxides determine the redistribution of metals with time.

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Section: Introductionmentioning

confidence: 99%

Effects of time, soil organic matter, and iron oxides on the relative retention and redistribution of lead, cadmium, and copper on soils

Diagboya

Olu-Owolabi

Adebowale

2015

Environ Sci Pollut Res

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“…80 -100 representing Oke Agbe, Arigidi, Ogbagi, Irun, and part of Ikare are characteized by moderately deep water levels (greater than 5 m) around the north central part. Although the thickness of the vadose zone is an important consideration in vulnerability assessment [33][34], the composition of the soil media and the lithology/physical properties of materials capping the vadose zone also constitute important parameters in vulnerability assessment [35]. Clay or silt, characterized by low resistivity (1 -100 Ω-m) and very low permeability, and impervious or semi-impervious materials (laterite and lateritic sand), characterized by high resistivity values (>400 Ω-m) constitute protective layers where they cap vadose zones.…”

Section: Resultsmentioning

confidence: 99%

Groundwater Potential and Vulnerability Assessment from Integrated Geophysical Methods, Borehole Logging, and Hydrogeological Measurement

2017

IJASRE

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“…the DRASTIC system by Aller et al 1987), where the weighting would be assigned based on the assigned importance number of the R factors, as indicated in Table 2, ranging from R = 1 to R = 3. However, development of such an expert system requires more analysis on whether or not to include other natural, mining, and technical factors.…”

Section: A Proposed Methods To Assess Water Hazards In Shaftsmentioning

confidence: 99%

Water Hazard Assessment in Active Shafts in Upper Silesian Coal Basin Mines

Bukowski

2011

Mine Water Environ

122

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Since 1976, there have been six inrushes of water into shaft mine workings in the Upper Silesian Coal Basin in Poland, with two of the more serious events occurring during the last 3 years. A safety assessment was conducted, considering inflow intensity, the amount of suspended material contained in the water flowing into the shaft, the proportion of water-bearing formations in the vertical profile, the condition of the shaft lining and safety pillar, and the history of the shaft. A risk assessment system is proposed to classify mine shafts with respect to the risk of a water hazard occurring, based on these factors. Each of the risk factors was assigned a weight, based on their relative significance, and then a method of evaluating each of these factors was developed. The proposed approach may be the basis for a more detailed, expert system for timely assessment of water hazard risk analysis. It may also be possible to adapt it to different geological and mining conditions.

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DRASTIC: A System to Evaluate the Pollution Potential of Hydrogeologic Settings by Pesticides

Cited by 791 publications

References 0 publications

Effects of time, soil organic matter, and iron oxides on the relative retention and redistribution of lead, cadmium, and copper on soils

Effects of time, soil organic matter, and iron oxides on the relative retention and redistribution of lead, cadmium, and copper on soils

Groundwater Potential and Vulnerability Assessment from Integrated Geophysical Methods, Borehole Logging, and Hydrogeological Measurement

Water Hazard Assessment in Active Shafts in Upper Silesian Coal Basin Mines

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