海南岛近岸海域环境容量与纳污总量分析

Study of the Relation between Coastal Water Environmental Capacity and Total Emission in Hainan Island

通过对海南岛"十二五"期间近岸海域纳污总量、环境质量状况及环境容量比较分析,得出各主要排污区环境容量的剩余环境容量。结果表明,全省主要污染物化学需氧量入海量仅占环境容量的2.6%,氨氮占环境容量的26.6%,虽然全省近岸海域环境基本未受污染物入海量影响,仍有较大的纳污空间,可利用的环境容量非常充裕。为避免出现排污达标但环境质量下降的状况,提出建立近岸海域主要污染物总量控制制度,由浓度控制到总量和浓度控制并存。

In this paper, by analysis and comparison of the total emission, environmental quality status and environmental capacity of the offshore marine areas of Hainan Island in the twelfth-five-year working period, the remaining environment capacity of each main emission area was obtained. The results showed that COD into the sea only accounted for 2.6% and NH-N accounted 3for 26.6% of the total environmental capacity. The offshore marine areas were not basically affected by the amount of pollutants into the sea, and there was still a large space for pollution load and the available environmental capacity was abundant. However, it was proposed that a total emission control system of the main pollutants should be established so as to avoid the situation that pollution discharge should be in compliance with the standards but environmental quality declined. Therefore, concentration control should be changed into the co-existence of total emission control and concentration control.