Table 1 Description of drifter deployments conducted at Lake Biwa in 2021
Trial no | Deployment | Retrieval | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Date | Location | Latitude | Longitude | Site type | Direction of coastline | Wind direction | Wind intensity | Date | Latitude | Longitude | Final situation | Collection method | |
#1 | 26-Jan | South of Chikubujima Island | 35.392402° N | 136.132850° E | Offshore | – | East | Strong | 29-Jan | 35.256895°N | 136.207663°E | Stranded on a beach | By foot |
#2 | 01-Feb | Beach at Kaizu-Osaki | 35.450330° N | 136.096688° E | Onshore | Northeast–Southwest | Northwest | Weak | 02-Feb | 35.448827°N | 136.093217°E | Stranded on a beach | By foot |
#3 | 02-Feb | Mouth of the Chinai River | 35.448825° N | 136.060655° E | Onshore | Northeast–Southwest | Northwest | Strong | 05-Feb | 35.428422°N | 136.192785°E | Stranded on a coastal sandbar | By canoe |
#4 | 05-Feb | Mouth of the Anegawa River | 35.387705° N | 136.214325° E | Onshore | Northwest–Southeast | Northeast | Strong | 09-Feb | 35.264823°N | 136.214832°E | Stranded on a beach | By foot |
#5 | 09-Feb | Mouth of the Chinai River | 35.448860° N | 136.060512° E | Onshore | Northeast–Southwest | Southwest | Weak | 10-Feb | 35.451402°N | 136.060405°E | Stranded on a beach | By foot |
#6 | 12-Feb | South of Chikubujima Island | 35.390060° N | 136.122115° E | Offshore | – | Not identified | Calm | 15-Feb | 35.297172°N | 136.254993°E | Stranded on wave-dissipating blocks around a breakwater of a port | By foot |
#7 | 25-Mar | Mouth of the Adogawa River | 35.315967° N | 136.075747° E | Onshore | East–West | Northeast | Weak | 26-Mar | 35.310927°N | 136.070269°E | Caught in a fixed shore net (and retrieved by local fishermen) | By boat |
#8 | 26-Mar | Mouth of the Ukawa River | 35.264407° N | 135.993800° E | Onshore | Northeast–Southwest | Northwest | Strong | 31-Mar | 35.213250°N | 136.066090°E | Caught in a fixed shore net | By boat |