术语“周期性污染”的详细信息

英译术语:

periodic pollution

汉语语境:

水体pH值变化存在两个方面因素，内因方面是渔洞水库水体中含有较为丰富的氮磷等营养元素，外因方面是气温，气温升高引起水温的升高和水库水体的分层现象，导致水体上下水层间好氧和厌氧加剧，从而引起水环境的周期性污染。

英语语境:

Water pH change has two aspects of factors. The internal aspect is that water body in Yudong reservoir is relatively rich in nutrients such as nitrogen and phosphorus, and external cause is the temperature, whose rise can cause the increase of water temperature stratification of reservoir water, and it causes the increase of water layer differences between aerobic and anaerobic, thus causing the periodic pollution of water environment.