辽河口近岸海域水体营养物推荐基准值的制定方法

Approach of nutrient criteria establishment and application in coastal area of Liaohe estuary

确定水质参照状态是近岸海域营养物及其响应指标基准制定的关键,基于现场观测数据分析确定参照状态并提出推荐基准值是一种重要的方法.以辽河口近岸海域为例,根据1995年～1999年和2003年～2009年的数据分析,主要应用频数分析法确定了参照状态,并结合1976年的数据分析,提出了该海域营养物(溶解无机氮、总氮、活性磷酸盐、总磷)及响应指标(叶绿素、溶解氧)的推荐基准值.分析显示,辽河口近岸海域营养物溶解无机氮、总氮、活性磷酸盐和总磷的推荐基准值分别为0.11,0.19,0.006,0.032mg/L;响应指标叶绿素、溶解氧的推荐基准值分别为0.0009,6.14mg/L.

In-situ observation based approach was important during enacting nutrients criteria in coastal area.Population distribution approach was introduced and applied to build the reference state and establish nutrients criteria on the case of Liaohe estuary.The data of 1995～1999 and 2003～2009 was analysised to build reference state and establish recommended nutrients criteria and data of 1976 was applied to validate the value.The recommended criteria value of DIN,TN,DIP,TP in coastal area of Liaohe estuary was 0.11,0.19,0.006 and 0.032mg/L,respectively,Chlorophyll-a and DO was 0.0009,6.14mg/L,respectively.