The influence of geomorphic unit spatial distribution on nitrogen retention and removal in a large river

摘要: Fluvial geomorphic features drive nutrient dynamics in river systems that have only recently begun to be incorporated into conceptual and numerical models designed predict yields flux. The role of channel units (pools, riffles, etc.) their associated aquatic communities determining nitrogen retention removal ecosystems is understudied. Here we study the effects spatial distribution on within-channel nitrate dynamics. We developed an agent-based model simulates biological hydrological processes involved occurring a segment 6th order Cahaba River, AL (USA). simulated under three scenarios which total area were held constant while longitudinal distributions manipulated low high supply levels (relative demand). High simulations suppressed any effect caused by differing sequence units/aquatic communities. In contrast, demonstrated differences potential for based Our findings suggest arrangement can important control large rivers, demonstrating fluvial merit consideration when rivers examined. Thus, measures geomorphology employed water quality management, biogeochemical studies, evaluate efficacy restoration efforts should broadened include characterization configuration