DRASTIC index computation

Once a DRASTIC Index has been computed, it is possible to identify areas v/hich are likely to be susceptible to ground water contamination relative to one another. The higher the DRASTIC Index, the greater the ground-water pollution potential. The DRASTIC Index provides only a relative evaluation tool and is not designed to provide absolute answers. 

Table IX—Computation of the DRASTIC Index for Setting 10 Bb-River Alluvium Without Overbank Deposit...

Data from computing-intensive prediction servers is precomputed, collected, and indexed (e.g., PSORT II [Nakai and Horton, 1999] or SMART [Letunic et al, 2004]). Harvester provides these data instantaneously and thus increases the speed of searches drastically compared to searching the respective databases manually one after the other. Pages older than 21 days are continuously updated. The quality of the collected information automatically increases with the quality of the crawled data servers, which themselves collect their information from several sub sources but quality-check them prior to publication (Apweiler et al, 2004 Diehn et al, 2003). 

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