The Environmental Protection Agency, in a statement last month, said it planned to revise standards for water discharges from coal-fired power plants like Hatfield’s Ferry.

美国环境保护局（EPA）在上个月发表了一份声明，计划修改火力发电厂（如哈德菲尔德渡船公司）用水排放的标准。

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According to the study agriculture is responsible for 43.7% of the nation's chemical oxygen demand (the main measure of organic compounds in water) 67% of phosphorus and 57% of nitrogen discharges.

研究表明，水质43.7%的化学需氧量(测量水质有机化合物的主要指标)、67%的含磷量和57%含氮量应归咎于农业。

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According to the study, agriculture is responsible for 43.7% of the nation's chemical oxygen demand (the main measure of organic compounds in water), 67% of phosphorus and 57% of nitrogen discharges.

研究表明，水质43.7%的国家化学需氧量(测量水质有机化合物的主要指标)、67%的含磷量和57%含氮量应归咎于农业。

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At any rate, the valves for the discharges that are in use are opened to supply water.

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Some newer engines also have flow-rate monitors for the discharges, these show the rate of water flowing in Gallons per Minute (GPM) instead of raw pressure.

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As water is flowing, the throttle is manipulated to control the water pressure being supplied to the discharges, this in turn affects the flow rate.

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