Abstract
Lixiahe region is one of the susceptible area to flood and waterlogging disasters in China due to its low topographic relief and having difficulty in draining floodwater away. The condition will be more serious if sea level rises in the future. The estimated results by some scientists indicate that the sea level could rise probably 20–100 cm by 2050. However, what the effect will future sea level rise exerts on flood drainage and on flood or waterlogging disasters? A hydrological system model has been developed to study the problem in the lower reaches of the Sheyang River basin. Predicted results from the model show that, if sea level rises, drainage capacity of each drainage river will decrease obviously, and the water level will also rise. From the change of drainage capacity of drainage rivers the trends of flood and waterlogging disasters are analyzed in the paper if the severe flood that happened in the past meets with future sea level rise. Some countermeasures for disaster reduction and prevention against sea-level rise are put forward.
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