杭州西湖表层沉积物中水溶性有机碳含量的时空分布特征

为了解西湖不同湖区表层沉积物中水溶性有机碳（WSOC）含量及动态变化规律，分别对西湖西进区域及大湖区域表层沉积物中的WSOC含量进行了调查。结果表明，西湖表层沉积物WSOC平均含量是387.1mg/kg，西湖不同湖区的表层沉积物中WSOC含量均呈现显著性的季节性动态变化，其中秋季含量显著低于另外三个季节，同一季节不同湖区的表层沉积物中WSOC含量不同。西湖西进区域茅家埠、乌龟潭和浴鹄湾沉水植物恢复区表层沉积物中WSOC含量均高于沉水植物匮乏区，但差异并不显著，可能是由于水流和人工作用使得恢复区与匮乏区没有严格的界限。然而开展沉水植被恢复措施的西湖西进区域却显著低于没有恢复的大湖区域，表明沉水植被恢复可以降低湖泊沉积物中WSOC含量，减少内源等污染物来源。

Spatial and Temporal Variations of Water-soluble Organic Carbon in Surface Sediments of West Lake, Hangzhou

Water-soluble organic carbon (WSOC) concentrations in surface sediments were investigated in different areas of West Lake (Hangzhou city) for a whole year. The results obtained from the investigation were as follows. Mean concentration of WSOC in surface sediments was 387.1 mg/kg. Significant differences were observed in different seasons, and WSOC in autumn was lower than the other three seasons, while differences were observed in different lake areas even in the same season. WSOC concentrations of the area dominated by submerged macrophyte were higher than those without submerged macrophyte in sublakes MaoJiabu, WuGuitan, YuHuwan, but the difference was not significant. It is possibly because there are no strict boundaries between vegetated and non-vegetated areas by the influence of water flow and artificial factors in the same sublake. However, the average values of the above three sublakes which have been restored with submerged macrophyte were significant lower than other sublakes, which shows submerged vegetation restoration, to some extent, could reduce WSOC content in surface sediments.