The Influence of Two‐Stage Ditches with Constructed Floodplains on Water Column Nutrients and Sediments in Agricultural Streams

摘要: The two-stage ditch is a novel management practice originally implemented to increase bank stability through floodplain restoration in channelized agricultural streams. To determine the effects of construction on sediment and nutrient loads, we monitored turbidity, also measured total suspended solids (TSS), dissolved inorganic nitrogen (N) species, phosphorus (P) after reference manipulated reaches four Turbidity decreased during inundation at all sites, but TSS P, soluble reactive (SRP) (TP) only ditches with longer duration inundation. Both TP were positively correlated within individual streams, neither turbidity. Phosphorus was elevated stream which manure applied adjacent reach, not suggesting that landscape plans could restrict transport stream, ultimately determining efficacy instream practices. In addition, ammonium nitrate lower initial N concentrations. Overall, results suggest TSS, reduced inundation, alone may be effective for managing high loads.