Biohydrochemical enhancements for streamwater treatment : engineered hyporheic zones to increase hyporheic exchange, control residence times, and improve water quality
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Nonpoint source pollution is the number one cause of water quality impairments to US rivers and lakes, and stormwater is the fastest growing category of nonpoint source pollution. In nature, nonpoint source pollutants can be treated by streambed sediments of impaired streams in a process analogous to biological sand filtration. This streambed biofilter is called the hyporheic zone (HZ), and it has been gaining attention in stream restoration due to its unique role in improving water quality. In particular, the HZ can attenuate pathogens (indicators), nutrients, and metals (the top three pollutant ...