But the combination of a rising pollution load and falling water levels makes that process much harder.

但是不断增长的污染量和下降的水位组合是那些步骤变得更难了。

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While a wetland with little research or understanding of the pollution will help to reduce the pollutant load, treatment wetlands are much more effective with a proper understanding of the water.

湿地或多或少能减少污染负荷，处理湿地要求对水的了解更深、处理污染的效率更高。

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To improve the self-purification ability and pollution situation of river water, control the pollution load and ensure the river basic flow are two important ways.

在控制污染负荷排放的同时，也要保证河流基本流量，提高水体自净能力，改善渭河水体的污染现状。

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