Aquifer vulnerability using recharge, depth to groundwater, soil type and slope to classify the vadose zone (Molototsi and Middle Letaba quaternary catchments, Limpopo Province, South Africa)

Makonto, Olma Tsakani; Dippenaar, Matthys Alois

doi:10.1007/s12665-014-3065-4

Cited by 3 publications

(1 citation statement)

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“…Ad di tion ally, nu mer i cal hydrogeological mod el ling can be ap plied to as sess ground water vul ner a bil ity. Re cently, nu mer ous more so phis ti cated methods have been de vel oped by mod i fy ing pre vi ous para met ric meth ods (e.g., Lee, 2003;Dixon, 2005;Zuquette et al, 2009;Hernández-Espriú et al, 2014;Makonto and Dippenaar, 2014). The op ti mal method de pends mainly on the data avail able and the spe cific con di tions of the study area, so it re quires very detailed geo log i cal sur vey ing.…”

Section: Introductionmentioning

confidence: 99%

Groundwater vulnerability based on four different assessment methods and their quantitative comparison in a typical North European Lowland river catchment (the Pliszka River catchment, western Poland)

Hermanowski

Ignaszak²

2016

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Ground wa ter vul ner a bil ity based on four dif fer ent as sess ment meth ods and their quan ti ta tive com par i son in a typ i cal North Eu ro pean Low land river catch ment (the Pliszka River catch ment, west ern Po land) The as sess ment of ground wa ter vul ner a bil ity is a cru cial part of plan ning and wa ter man age ment be cause it can iden tify areas where aqui fers are more sus cep ti ble to con tam i na tion. De pend ing on the vul ner a bil ity as sess ment method, the re sults can dif fer sig nif i cantly. Con se quently, dif fer ent meth ods can pro vide am big u ous in for ma tion that could fur ther in flu ence de cision-mak ing pro cesses in plan ning or wa ter man age ment. For the Pliszka River catch ment, the in trin sic ground wa ter vul nera bil ity of the up per most aqui fer was es ti mated us ing four dif fer ent meth ods: DRASTIC, GOD, and two meth ods that are based on em pir i cal for mu las of wa ter res i dence time in an un sat u rated zone. The in put data in clude a se ries of the matic maps sup ple mented by 1,322 shal low bore hole pro files and lab o ra tory tests of sam ples col lected in the course of field work. The col lected data were pro cessed in GIS soft ware, and the re sults of each method were mapped in high res o lu tion. The result ing maps of ground wa ter vul ner a bil ity were then quan ti ta tively com pared to val i date their ap pli ca bil ity for the as sess ment of ground wa ter vul ner a bil ity in a typ i cal North Eu ro pean Low land river catch ment. The maps gen er ated by the DRASTIC and GOD meth ods are dom i nated by ar eas with mod er ately high (54.6 and 48.4%, re spec tively) and mod er ate ground wa ter vulner a bil ity (32.7 and 32.3%, re spec tively). No ar eas of high ground wa ter vul ner a bil ity are pres ent. One of the wa ter res i dence time meth ods pro vides re sults sim i lar to the pre vi ous meth ods at the catch ment scale, and one method yields high groundwa ter vul ner a bil ity val ues for the ma jor ity of area.

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