ANALYSIS OF A FISH DEATH ACCIDENT CAUSED BY A GATE REPAIRS BY USING SSEM

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  • 水域生態系モデリングツールSSEMを用いた水門工事に伴う魚のへい死事故の解析
  • スイイキ セイタイケイ モデリング ツール SSEM オ モチイタ スイモン

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A fish death accident was occurred in a drainage canal from a reclaimed land. Decrease of salinity caused by a gate repairs and lack of oxygen cased by rapid increase of temperature were thought to be the cause of the accident. In addition, our investigation showed the possibility of pesticide inflow. The effects of these factors were estimated by experiments using mullet. The current simulation model of the canal was also constructed. Then SSEM, a Shallow Sea Ecological Model, was extended to simulate the pesticide inflow and salinity change. The extended SSEM revealed that the decrease of water quantity, the decrease of salinity and the pesticide inflow caused the accident. To decrease the pesticide amount down to one fifth, the accident might not be occurred.

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