旅游活动对三亚湾水体水质的影响

近几年三亚旅游业发展迅速,给三亚湾水体水质带来一定影响.为评估旅游活动对三亚湾水体水质变化的影响,于2012年1-4月份期间在三亚湾沿岸不同人口聚居程度区域附近水域采集水样,测定其溶解氧(DO)、pH、以及总磷、磷酸盐和亚硝酸盐浓度.结果发现三亚湾水体中溶解氧、pH、总磷、亚硝酸盐和磷酸盐浓度的变化范围分别为6.10～6.67mg/L、8.10～8.15、0.057～0.089mg/L、0.009～0.018mg/L和0.012～0.024mg/L,且总磷、亚硝酸盐和磷酸盐浓度与沿岸人口聚居程度呈正相关关系.总磷在三亚湾沿岸不同水域间无显著性差异(P>0.05),亚硝酸盐和磷酸盐在不同水域间存在显著性差异(P<0.05).这说明旅游季节和沿岸人口聚居程度对三亚湾水体中的总磷浓度无显著性影响,对水体中亚硝酸盐和磷酸盐浓度有显著性影响.

Effect of Tourism on the Water Quality in the Sanya Bay

Water quality of the Sanya Bay was affected by the rapid development of tourism in recently years in Sanya City. Water quality parameters, dissolved oxygen, pH, total phosphorus, phosphates and nitrite of water sample collected from the Sanya Bay close to different habitation density of people, were measured to assess the effect of tourism on water quality from January to April, 2012. The results show that the concentration ranges of dissolved oxygen, pH, total phosphorus, nitrite, phosphates was 6. 10 - 6. 67 mg/L, 8.10 - 8. 15 mg,/L, 0. 057 0. 089 mg/L, 0. 009 -0. 018 mg/L and 0. 012 - 0. 024 mg/L respectively. The relationship between residen- tial density nearby coastal area and concentration of nitrite and phosphates was significant positive . There is significant difference of phosphates and nitrite among different territorial waters accompanied to different intensity of residential area（ p 〈 0.05 ）, but not significant difference of total phosphorus （ p 〉 0.05 ）. The tourism and habitation intensity of residents have effect on phosphates and nitrite significantly, but not on total phosphorus.