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Accueil du site → Doctorat → Inde → 2004 → Hydrogeological modelling and hydrogeochemical characterisation of an unconfined aquifer system of the lower palar river basin southern india

Anna University (2004)

Hydrogeological modelling and hydrogeochemical characterisation of an unconfined aquifer system of the lower palar river basin southern india

Senthil Kumar, M

Titre : Hydrogeological modelling and hydrogeochemical characterisation of an unconfined aquifer system of the lower palar river basin southern india

Auteur : Senthil Kumar, M

Université de soutenance : Anna University

Grade : Doctor of Philosophy (PhD) 2004

Résumé partiel
This work is related to hydrogeological and hydrogeochemical studies in the lower Palar River basin, southern India, located 75 kms south of the Chennai city (formerly known as Madras). The objectives of the study were : to determine the response of the aquifer system to variations in rainfall ; to identify the hydrogeochemical characteristics of the groundwater and geochemical processes ; to develop a three-dimensional mathematical model to simulate the regional groundwater flow and solute ; and to assess the behaviour of the aquifer system under different hydrogeological stresses in this area. •y The study area (392 km), experiences subtropical climate with an average rainfall of 1167 mm/year (average from 70 year rainfall data). Two rivers traverse the terrain, of which Palar is the major river and it bisects the area into two halves. There are numerous ponds/lakes, of which Madurantakam Lake is the largest. Geology of this area is characterised by chamockites and granitic gneiss of the Precambrain age and Recent alluvium. The alluvium is found along the present and palaeo channels, while the chamockites and granitic gneisses form the basement rock. The alluvium and weathered rock (chamockites and granitic gneiss) function as the aquifer system. The upper alluvial layer is characterised by alluvium of recent age and consists of sand, gravel, sandy clay, silt and clay. The lower layer consists of weathered chamockites and the granitic gneiss. Groundwater is found to occur in these layers in an unconfined condition

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Page publiée le 17 juin 2022