Table 1. Descriptions of ponds, sampling dates, and inventories of 137Cs in soils surrounding ponds estimated from the Third Airborne Monitoring Survey, by MEXT21. Total inventories of 137Cs were estimated as inventory on ground surrounding the ponds within 25 m distance, and the decay is corrected on 2 Jul. 2011.
| Descriptions | Oyado | Takayashiki | Neppami-ike | Matsuzawakami-ike |
|---|---|---|---|---|
| Surface area (m2) | 804 | 673 | 2400 | 8720 |
| Maximum depth (m) | 0.7 | 0.3 | 1.4 | 2.0 |
| Catchment area (ha) | 3.6 | 1.6 | 20 | 9.8 |
| Sampling date | 8 Jul. 2011 | 8 Jul. 2011 | 4 Aug. 2011 | 4 Aug. 2011 |
| Total inventory of 137Cs (kBq m−2) | 360 | 318 | 349 | 206 |