POTENTIAL ZONES OF PERUVANTHANAM AND VALIYATHODU SUB-WATERSHEDS OF MANIMALA RIVER BASIN

Groundwater is a dynamic and replenishable natural resource. But in hard rock terrains, its availability is of limited extent. In sub-watershed studies, remote sensing and GIS techniques have the advantages of spatial, spectral and temporal data, covering large and inaccessible areas within a short...

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Veröffentlicht in:American journal of environmental sciences 2013-01, Vol.9 (1), p.62-72
Hauptverfasser: Rekha, Vadakkepurakkal, George, Aikara Varkey, Mendez, Rita
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Sprache:eng
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Zusammenfassung:Groundwater is a dynamic and replenishable natural resource. But in hard rock terrains, its availability is of limited extent. In sub-watershed studies, remote sensing and GIS techniques have the advantages of spatial, spectral and temporal data, covering large and inaccessible areas within a short span of time. Thus this technique has become a very handy tool in assessing and monitoring groundwater resources. The groundwater potential zones are classified in to five zones viz, 'excellent to very good', 'very good to good', 'good to moderate', 'moderate to poor' and 'poor to very poor'. Critical analysis and comparison of ground water potential zones of both sub-watersheds reveals that, 26.10 km super( 2) area of Valiyathodu sub-watershed fall under 'excellent to very good' category where as in Peruvanthanam sub-watershed it is 7.69 km super( 2). Hence it is explicit that, in general groundwater potential is better in Valiyathodu sub-watershed compared to Peruvanthanam sub-watershed.
ISSN:1553-345X
1558-3910
DOI:10.3844/ajessp.2013.62.72