南海旅游岛虎头山人工湖水量平衡分析研究

Analysis of Water Balance in the Artificial Lake of Hutou Mountain in South China Sea Tourist Island

人工湖作为海绵城市建设中重要的调蓄设施,在内涝治理中发挥着重要作用。本文以茂名虎头山人工湖为例,分析了该人工湖水量平衡状态及雨洪调蓄能力。研究表明,径流补给量、蒸发量、下渗量、外来补水量组成了人工湖水量循环平衡过程,在依靠降雨径流补给时,枯水季(1—3月)由于降雨不足,为维持景观水体水位,需人工补水0.21万m 3,其余季节依靠水体调蓄即可满足景观水位需求;人工湖在雨洪调蓄中发挥着重要作用,可削减洪水量0.97万m 3,有效缓解了内涝风险,保障了水环境安全。

As an important retention facility in sponge city construction,artificial lake plays a vital role in the management of urban waterlogging.Taking the artificial lake in Hutou Mountain in Maoming as an example,this paper analyzes the water balance state and rainwater storage capacity of the artificial lake.The results show that the water circulation balance process of the artificial lake is composed of runoff supply,evaporation,infiltration,and external water supply.Relying on rainfall runoff supply,during the dry season(January to March),0.21 million cubic meters of water needs to be artificially replenished to maintain the water level for landscape purposes,while in other seasons,the water level requirements can be met by water storage in the lake.The artificial lake plays an important role in rainwater storage and flood control,reducing floodwater by 0.97 million cubic meters and effectively alleviating the risk of waterlogging,thus ensuring water environmental safety.