10:30 〜 10:45
[ACG07-06] 閉鎖性水域の水質予測のためのBiwa-3Dの開発
キーワード：湖, 水質, 溶存酸素, クロロフィルa, 長期変動
Biwa-3D, an integrated water quality model, has been developed for water quality assessment in lakes and estuary. Water temperature and dissolved oxygen in Lake Biwa has been numerically simulated using Biwa-3D with 250 m horizontal grid spacing. Calculated temperature has been compared with field observation results by Lake Biwa Environmental Research Institute (LBERI), showing good agreement especially in horizontal direction. The model outputs for dissolved oxygen concentration initially showed earlier decrease compared to the field observation results, which has been modified throughout adjusting vertical mixing procedure during stratified and non-stratified season. The model also showed non-uniform distribution in east-west section, which observation can not support due to the luck of sampling station. Seasonal change in Chlorophyll-a concentration is also simulated and compared with field observation data. Application of the model into different lakes, including Lake Tahoe, is introduced with relevant agreement with field observation dataset. Parallelization of the model enables us to perform long-term water quality prediction.