河道径流是流域水资源中最重要的组成部分。

The river runoff is the main part of basin water resources.

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尽管如此，诸如城市径流遭到污染以及污水外溢等问题仍然困扰着当地的河道。

However, problems like urban runoff and sewer overflows continue to trouble local waterways.

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潜水河雨后地表径流由地表下潜水、雨水地面上径流、雨水风化层径流构成，三部分水均随河道流量的增减而增减。

Stormflow consists of phreatic water, surface runoff and weather horizon-passing rain. The rise and drop of their discharge are consistent with that of the river discharge after rain.

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