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A conceptual DO model was developed to investigate the influence of wind and rain on the dissolved oxygen concentration around the head of Tokyo Bay. Since the DO concentration in the lower layer around the bay head has been revealed to be predominantly controlled by estuarine circulation, the effect of rain and wind on estuarine circulation was included in the conceptual DO model. The conceptual DO model, thus, consists of the following five components. (1) DO consumption at sea bottom; (2) Estuarine circulation due to stratification; (3) Change in estuarine circulation due to wind; (4) Change in estuarine circulation due to inflow from rivers; and (5) Sweep effect due to strong wind. To clarify the effect of inflow from rivers, it is needed to estimate river discharge from rainfall intensity in terms of runoff model. In this study, we decided to use a linear storage function model so that it enables us to evaluate the influence of rain on DO concentration around the bay head theoretically. Partitioning triangle method was introduced, which makes us understand the contribution of each component easily. And also, the significance of river discharge effect was revealed on the recovery of the DO concentration.
- 公益社団法人 土木学会の論文
公益社団法人 土木学会 | 論文
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