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|Title:||Spatial and seasonal variation of groundwater levels in Vattamalaikarai River basin, Tamil Nadu, India - A study using GIS and GPS|
|Keywords:||Water table elevation model;Groundwater fluctuation;Hydrographs;Groundwater flow;Vattamalaikarai Basin|
|Abstract:||Groundwater is the major source of water in Vattamalaikarai River basin, Tamil Nadu, India for meeting the demand of the population for drinking and agriculture activities throughout the year. The basin occupies an area of 436.5 Km2. Detailed field investigation was carried out in the basin during November 2011 for understanding the spatial and seasonal behavior of groundwater fluctuation. Groundwater levels were measured at 70 well locations with the help of water level recorder. GPS was used to find out the geographical coordinates and altitude of the wells with respect to the mean sea level. Hydrographs were prepared to understand the long-term groundwater fluctuation in various types of soils. It was observed that recharge rate was low in black cotton soil and high in alluvial soil. It was further observed that there was a quick response of water level to rainfall in red soil whereas the response was moderate to poor in calcareous soil. The minimum, maximum and average annual groundwater level fluctuations have been computed and plotted based on 21 years water level data and field observations. Groundwater flow directions were predicted using GIS based on the differences in groundwater head at various well locations. Spatial and seasonal groundwater level fluctuations were also plotted using GIS. Three dimensional water table elevation model was also prepared using GIS based on the groundwater levels in wells and topography of the basin.|
|ISSN:||0975-1033 (Online); 0379-5136 (Print)|
|Appears in Collections:||IJMS Vol.47(09) [September 2018]|
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