Particle-size distributions for streambed sediment in two Maumee River tributaries, July 2019

The Maumee River network contributes a significant amount of total phosphorus (P), including both sediment-bound P (sed-P) and dissolved P, to the Western Lake Erie Basin. Most Maumee River headwater streams are agricultural, with conservation management focused on limiting sediment and nutrient transport from cropland to the stream network. However, several studies have shown streambank erosion to be another source of suspended sediment in these streams. This data release is comprised of four tables with data related to particle-size distribution and resultant estimate of sed-P mass based on streambed-sediment stored in the Black Creek, IN (U.S. Geological Survey number 04183038) and Little Flatrock Creek, OH (04191444) stream networks in July 2019. Data included provided for extrapolation from described reaches to the entire network upstream of the gage.

莫米河网向伊利湖西部盆地输入了大量总磷（total phosphorus, P），其中涵盖结合态磷（sediment-bound P, sed-P）与溶解态磷。莫米河的多数源头溪流均为农业流域，其保护管理工作重点在于限制农田向河网输运沉积物与营养盐。不过多项研究表明，岸滩侵蚀是这类溪流中悬浮沉积物的另一重要来源。本次发布的数据集包含四张数据表，涵盖2019年7月采集的印第安纳州布莱克溪（美国地质调查局编号04183038）与俄亥俄州小弗拉特罗克溪（04191444）河网的河床沉积物粒径分布数据，以及基于该河床沉积物估算得到的结合态磷（sed-P）质量数据。所提供的数据可用于将所述河段的相关结果外推至水文测站上游的完整河网范围。