防城港东湾纳潮量减弱及其影响分析

【目的】研究防城港东湾水交换改变状况,分析其变化的原因,并探讨造成的影响。【方法】采用传统方法计算防城港东湾2008年和2012年的纳潮量。【结果】2008年防城港东湾纳潮量为1.8443×108 m3,2012年纳潮量为1.7436×108 m3,仅4年时间防城港东湾纳潮减少量占总纳潮量的5.5%。纳潮量减少后海水交换能力明显减弱。【结论】港口码头工程填海和岸线及滩涂资源的大量利用减少了湾内海域空间面积,造成海水交换能力减弱,使湾内海洋生态环境出现退化现象。

Analysis on the Decline of Tidal Volume in Fangchenggang East Bay and Its Influence

Objective] This study is to analyze the characteristics and variation of the water exchange in Fangchenggang East Bay, and to evaluate its forming reason and its impact on the bay.Methods] A traditional method is used to calculate the tidal volumes in 2008 and 2012.Results] The tidal volume of Fangchenggang East Bay is about 1.8443×10⁸ m³ in 2008 and 1.7436×10⁸m³ in 2012, corresponding to which the tidal volume reduced about 5.5% in the four years. As a result, the water exchange ability weakened significantly in the bay.Conclusion] The large utilization of the port reclamation engineering, the coastline and beaches resources reduced the marine area and weakened the water exchange capacity, and resulted in the degradation of the marine ecological environment.