Cross sections of the Le Sueur and Maple Rivers, Minnesota

A total of 44 cross-sections were surveyed on the Le Sueur and Maple rivers, near Mankato, Minnesota in 2008 and again in 2015. The cross sections were initially measured in 2008 to support development of a watershed sediment budget (Belmont et al., 2011; Gran et al., 2011) and a numerical sediment routing model (Viparelli et al., 2014). The flood of record occurred in 2010, with several other large floods in subsequent years. So the cross-sections were repeated in 2015 in an effort to quantify morphological changes in the channel to inform development of a morphodynamic channel-floodplain model (Call et al., 2017). In each survey, a total of 20 bankfull cross-section surveyed on the Le Sueur River and another 24 cross sections were surveyed on the Maple River.

2008年与2015年，研究团队在明尼苏达州曼卡托附近的勒叙厄尔河（Le Sueur River）与枫树河（Maple River）上共开展了两轮断面测量，总计44个断面。这些断面最初于2008年完成测量，用于支撑流域沉积物预算（Belmont等人，2011；Gran等人，2011）与数值输沙模型（Viparelli等人，2014）的研发。2010年发生了有记录以来的特大洪水，后续数年也接连发生多场大型洪水。因此研究团队于2015年重复开展断面测量，以量化河道地貌变化，为地貌动力学河道-漫滩模型（Call等人，2017）的开发提供数据支撑。在两次测量中，勒叙厄尔河均完成了20个满岸断面（bankfull cross-section）的测量，枫树河则完成了24个断面的测量。