Radon in Himalayan springs: a geohydrological control |
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| Authors: | V M Choubey S K Bartarya R C Ramola |
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| Institution: | (1) Wadia Institute of Himalayan Geology, 33 General Mahadeo Singh Road, Dehra Dun 248001, India, e-mail: vchoubey@biosys.net, IN;(2) Department of Physics, H.N.B. Garhwal University Campus, Tehri Garhwal 249001, India, IN |
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| Abstract: | This paper presents the results of radon measurements in springs of the Himalayan region by using radon emanometry technique.
The radon was measured in different springs, draining from different geohydrological setups, and from stream water in order
to find the geohydrological control over radon concentration in groundwater emanating in the form of spring. The radon values
were found to vary from 0.4 Bq/l to 887 Bq/l, being observed lowest for a turbulent stream and highest for the spring. The
radon values were recorded highest in the springs draining through gneiss, granite, mylonite, etc. Radon concentrations have
been related with four spring types viz. fracture-joint related spring, fault-lineament related spring, fluvial related spring
and colluvial related spring, showing geohydrological characteristics of the rocks through which they are emanating. The high
radon concentration in fracture-joint and fault-lineament spring is related to increased ratio of rock surface area to water
volume and uranium mineralisation in the shear zones present in the close vicinity of fault and thrust. The low concentration
of radon in fluvial and colluvial springs is possibly because of high transmissivity and turbulent flow within such deposits
leading to natural de-emanation of gases.
Received: 6 January 1998 · Accepted 11 May 1999 |
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| Keywords: | Radon Garhwal-Himalaya Spring Geohydrology |
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