Table 1. The measured activity concentrations and the contributions of 40K, 238U and 232Th to air kerma rates in Karunagappally Taluk.
| Panchayat | Location | Air kerma rate (nGy/h) | Contribution to air kerma rate (%) | Activity concentration (Bq/kg) | Surface | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Latitude (°) | Longitude (°) | 40K | 238U | 232Th | Total | 40K | 238U | 232Th | 40K | 238U | 232Th | Classification (soil, grass, sand) | |
| Alappad | 9.0369 | 76.5087 | 4 | 159 | 471 | 634 | 1 | 25 | 74 | 99 ± 2 | 359 ± 22 | 716 ± 29 | Soil |
| 9.0524 | 76.5068 | 10 | 25 | 69 | 104 | 10 | 24 | 66 | 240 ± 5 | 57 ± 3 | 105 ± 4 | Soil | |
| 9.1352 | 76.4639 | 28 | 16 | 47 | 91 | 31 | 17 | 52 | 672 ± 13 | 36 ± 2 | 71 ± 3 | Soil | |
| Chavara | 8.9696 | 76.5361 | 1 | 55 | 198 | 254 | 1 | 22 | 78 | 32 ± 1 | 124 ± 7 | 300 ± 12 | Soil |
| 8.9704 | 76.5450 | 2 | 95 | 334 | 431 | 0 | 22 | 77 | 44 ± 1 | 215 ± 13 | 507 ± 20 | Soil | |
| 8.9877 | 76.5616 | 9 | 24 | 58 | 91 | 10 | 26 | 64 | 214 ± 4 | 54 ± 3 | 88 ± 4 | Soil | |
| 8.9848 | 76.5527 | 4 | 41 | 92 | 137 | 3 | 30 | 67 | 92 ± 2 | 93 ± 6 | 142 ± 6 | Grass | |
| 8.9889 | 76.5314 | 2 | 46 | 166 | 214 | 1 | 21 | 78 | 46 ± 1 | 103 ± 6 | 253 ± 10 | Soil | |
| 8.9698 | 76.5294 | 17 | 163 | 461 | 641 | 3 | 25 | 72 | 407 ± 8 | 370 ± 22 | 709 ± 28 | Soil | |
| 8.9928 | 76.5242 | 40 | 558 | 1543 | 2141 | 2 | 26 | 72 | 955 ± 19 | 1269 ± 76 | 2374 ± 95 | Sand | |
| Neendakara | 8.9680 | 76.5316 | 6 | 39 | 113 | 158 | 4 | 25 | 71 | 145 ± 3 | 88 ± 5 | 172 ± 7 | Soil |
| 8.9634 | 76.5317 | 6 | 98 | 220 | 324 | 2 | 30 | 68 | 151 ± 3 | 222 ± 13 | 334 ± 13 | Soil | |
| 8.9557 | 76.5328 | 25 | 391 | 967 | 1383 | 2 | 28 | 70 | 594 ± 12 | 889 ± 53 | 1488 ± 60 | Sand | |
| 8.9557 | 76.5328 | 40 | 521 | 1460 | 2021 | 2 | 26 | 72 | 964 ± 19 | 1185 ± 71 | 2247 ± 90 | Sand | |
| 8.9534 | 76.5418 | 4 | 76 | 277 | 357 | 1 | 21 | 77 | 102 ± 2 | 172 ± 10 | 420 ± 17 | Grass | |
| 8.9420 | 76.5360 | 5 | 125 | 430 | 560 | 1 | 22 | 77 | 113 ± 2 | 283 ± 17 | 654 ± 26 | Sand | |
| Oachira | 9.1352 | 76.5281 | 6 | 28 | 70 | 104 | 6 | 27 | 67 | 139 ± 3 | 64 ± 4 | 107 ± 4 | Soil |
| 9.1329 | 76.5338 | 3 | 11 | 28 | 42 | 8 | 26 | 66 | 81 ± 2 | 25 ± 2 | 42 ± 2 | Soil | |
| 9.1167 | 76.5293 | 3 | 18 | 52 | 73 | 4 | 25 | 71 | 66 ± 1 | 41 ± 2 | 79 ± 3 | Soil | |
| 9.1170 | 76.5180 | 2 | 22 | 66 | 90 | 2 | 25 | 73 | 37 ± 1 | 51 ± 3 | 100 ± 4 | Soil | |
| 9.1351 | 76.5088 | 2 | 61 | 215 | 278 | 1 | 22 | 77 | 56 ± 1 | 138 ± 8 | 327 ± 13 | Soil | |
| Panmana | 9.0309 | 76.5501 | 10 | 105 | 322 | 437 | 2 | 24 | 74 | 232 ± 5 | 238 ± 14 | 496 ± 20 | Soil |
| 9.0019 | 76.5429 | 2 | 69 | 269 | 340 | 1 | 20 | 79 | 53 ± 1 | 156 ± 9 | 408 ± 16 | Soil | |
| 9.0041 | 76.5365 | 4 | 28 | 74 | 106 | 3 | 26 | 70 | 84 ± 2 | 64 ± 4 | 114 ± 5 | Soil | |
| 9.0008 | 76.5254 | 9 | 93 | 244 | 346 | 3 | 27 | 70 | 218 ± 4 | 212 ± 13 | 375 ± 15 | Soil | |
| 9.0162 | 76.5340 | 6 | 37 | 117 | 160 | 4 | 23 | 73 | 135 ± 3 | 84 ± 5 | 177 ± 7 | Soil | |
| 9.0250 | 76.5378 | 1 | 54 | 185 | 240 | 0 | 23 | 77 | 22 ± 0 | 123 ± 7 | 281 ± 11 | Soil | |
| Thevalakkara | 9.0177 | 76.5617 | 5 | 20 | 57 | 82 | 6 | 24 | 70 | 115 ± 2 | 45 ± 3 | 86 ± 3 | Soil |
| 9.0135 | 76.5881 | 5 | 30 | 93 | 128 | 4 | 24 | 73 | 108 ± 2 | 68 ± 4 | 142 ± 6 | Soil | |
| 9.0106 | 76.5934 | 5 | 33 | 94 | 132 | 4 | 25 | 72 | 112 ± 2 | 74 ± 4 | 143 ± 6 | Soil | |
| 9.0061 | 76.5909 | 2 | 27 | 92 | 121 | 1 | 23 | 76 | 36 ± 1 | 62 ± 4 | 139 ± 6 | Soil | |
| 8.9920 | 76.5746 | 4 | 24 | 72 | 100 | 4 | 24 | 72 | 100 ± 2 | 54 ± 3 | 110 ± 4 | Soil | |