广西北部湾海域典型冲积沙岛生态经济发展初步研究

Eco-economic Development of Typical Alluvial Islands in Guangxi Beibu Gulf

根据现场调研、海岛地名普查基础资料和高分辨率遥感影像解译获得的数据,采用数理统计和对比分析等方法,在分析广西北部湾海域冲积沙岛特征的基础上,着重以七星岛为例研究冲积沙岛的生态经济发展,结果显示:广西北部湾海域冲积沙岛总面积22.17 km^(2),占海岛总面积的18.5%,10000 m^(2)以下的冲积沙岛占冲积沙岛总数的58%,面积都偏小;冲积沙岛岸线总长度127.81 km,岸线长度低于1000 m的冲积沙岛占75.7%,长度偏短;冲积沙岛主要分布在南流江口、龙门港和铁山港,已开发冲积沙岛超过半数,典型冲积沙岛有七星岛、外沙岛和南域围;七星岛具有岛内潮汐性水系、跳跳鱼、放养型海鸭和“吊脚楼”四大生态经济特色;七星岛适合打造特色生态旅游岛。

This study is conducted according to data based on field investigations, island names survey and remote sensing image interpretation.Mathematical statistics and contrast analysis methods are used to analyze the eco-economic development of alluvial islands.Based on the analysis of the characteristics of alluvial islands in Beibu Gulf, a case study of eco-economic development of alluvial sand islands was conducted.The results show that the total area of alluvial islands is 22.17 km^(2),accounting for 18.5% of the total area of the islands in Beibu Gulf.And 58% of the alluvial sand islands cover an area less than 10 000 m^(2),which is relatively small.The total length of alluvial sand islands is 127.81 km, which is short as 75.7% of the alluvial sand islands has a coastline shorter than 1 000 m.Alluvial islands in Beibu Gulf are mainly distributed in Nanliu River estuary, east coast of Qisha Peninsula and Tieshan Port.Over half of the alluvial islands have been developed, among which typical ones are Qixing Island, Waisha Island and Nanweiyu Island.Qixing Island has four eco-economic characteristics, namely the tidal river, mudskipper, stocking-type sea ducks and stilted buildings, which helps in building it into a featured eco-tourism island.The research on eco-economy of typical alluvial islands could provide a reference for ecological protection, development and management of the islands.