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1969 Dec

Issue (Volume No. 30, Number 3)

CHARACTERIZATION OF STREAM-AQUIFER SYSTEM AND DYNAMICS OF STREAM-AQUIFER INTERACTION IN KATHAJODI RIVER BASIN, ORISSA

Sustainable management of groundwater resources is the key concern worldwide, especially in developing countries. The present study was carried out in the Kathajodi River basin of Orissa, which is a typical river island surrounded by the Kathajodi River and its branch Surua River. It included streamflow analysis, hydrogeologic investigation, pumping tests and exploration of stream-aquifer interaction dynamics. The results of 4 years streamflow analysis indicated that the river flow is highly seasonal and it reduces to almost no flow during summer, thereby threatening river ecosystem. The lithologic analysis revealed that the study area is dominated by a confined aquifer system comprising medium to coarse sand. The aquifer exists at depths ranging from 15 to 50 m and its thickness ranges from 20 to 55 m over the basin. The analysis of time-drawdown pumping test data at 9 sites indicated aquifer hydraulic conductivity varying from 11.25 to 96.80 m/ day, which suggests significant aquifer heterogeneity. The results of the correlation analysis of groundwater levels with river stage and rainfall indicated a higher correlation between groundwater levels and river stage (r = 0.67-0.89) than that between groundwater level and rainfall (r = 0.33-0.66). This finding suggests a strong river-aquifer interaction in the basin.

by S. Mohanty, Madan K. Jha , Ashwani Kumar and B. K. James
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