초록

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Abstract ▼ AI-Helper

The length of seawater intrusion is calculated from the tidal distribution and inlet upstream flow of the Nakdong River using MIKE21 Model. The rising behavior of the salt wedge in the estuary is affecting for the quality of life Water, industrial water, agricultural water. The value salt concentrat...

The length of seawater intrusion is calculated from the tidal distribution and inlet upstream flow of the Nakdong River using MIKE21 Model. The rising behavior of the salt wedge in the estuary is affecting for the quality of life Water, industrial water, agricultural water. The value salt concentration regulation of Ministry of Environment was set for living water 0.5 psu and Busan City was set for industrial water 0.3 psu. To maintain this values, the Nakdong River of Estuary Barrage(NREB) in 1987 was constructed, it was blocked the intrusion of seawater by floodgates. Construction of NREB has brought a change in water quality and ecosystem deterioration in a certain region. Busan City has announced to establish a restoration plan for the conversion into the mixing area(Brackish Water Zone : BWZ) of salt and fresh water from NREB to upstream 6km. In other words, it was set a plan of the composition 6km mixing zone that salt water flows directly to the barrage upstream in order to restore the ecosystem. The study clearly identify this corresponds a minimum flow rate and tidal level conditions to generate a saltwater intrusion and to propose a penetration length of saline provides the specification requirement for of restore plan.

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