Urban runoff pollution is serious especially for earlier runoff and it is one of the reasons that lead to water body eutrophic algal bloom and red tide on sea.
城市雨水径流特别是初期雨水污染严重，是水体富营养化、华以及海域赤潮等环境问题产生的根源之一。
When eutrophic condition of water body is serious, algae on water surface proliferate and cover the water surface flakily to form water blooms or red tides.
水体严重富营养化时，水面藻类增殖，成片或成团地覆盖在水体表面，形成水华或赤潮。
Urban runoff pollution is serious especially for earlier runoff and it is one of the reasons that lead to water body eutrophic, algal bloom and red tide on sea.
城市雨水径流特别是初期雨水污染严重，是水体富营养化、华以及海域赤潮等环境问题产生的根源之一。
Urban runoff pollution is serious especially for earlier runoff and it is one of the reasons that lead to water body eutrophic, algal bloom and red tide on sea.
城市雨水径流特别是初期雨水污染严重，是水体富营养化、华以及海域赤潮等环境问题产生的根源之一。
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