Fig 1.
(a) The study area map showing the sampling location of river water (RW) and tap water (TW). The map has been produced using ArcGIS 10.4.1 software. The sources of basemaps of administrative boundaries and inland water bodies: Esri, GADM, Garmin, DigitalGlobe, GeoEye, GEBCO, USGS, NOAA, National Geographic, EPA, Geonames.org, the GIS User Community and other contributors. (b) The geology of the study area (the sources of basemaps are similar to (a) and the geological units modified after [16, 28, 29]).
Table 1.
Fig 2.
Schematic diagram of RAD-H2O detector closed loop aeration system, where the air and water volume remain constant and independent of the flow rate.
Table 2.
Measured 222Rn concentration and calculated effective doses for the Buriganga river water.
Table 3.
A worldwide comparative scenario of the 222Rn level in river water.
Table 4.
Measured 222Rn concentration and calculated effective doses for the tap water.
Table 5.
A worldwide comparative scenario of the 222Rn level in tap water.