河流的沉淀物中含有大量的放射性物质，这些放射性物质被暴风雨或洪水冲上河滩，使那里的土壤成为放射性污染源之一。
Its sediments remain highly contaminated and tainted floodplain soils that wash up during storms and floods have now become a source of radioactive materials.
所有的这些气体穿过沉淀物浮向海洋，使深海海水温度升高。
All that gas buoys up through the sediments and into the ocean, heating up the deep waters.
利用湿地减缓水体流速，并使化学沉淀物和相关污染物沉淀下来。
Use wetlands to slow the water down and allow sediments and associated pollutants to settle out.
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