St. Croix National Scenic Riverway (SACN): Sonar Data Mapping to Assess Native Mussel Habitat

The National Park Service (NPS) partnered with the U.S. Geological Survey (USGS) to collect hydroacoustic data of the Saint Croix River for the development of high-resolution bathymetry and sidescan imagery. The combined datasets will provide key components to characterizing benthic habitat. These information needs were highly desired by the NPS to more accurately assess environmental factors that influence native mussel distribution. The project was funded by the Legislative-Citizen Commission on Minnesota Resources (LCCMR) Environment and Natural Resources Trust Fund (ENRTF), to help maintain and enhance Minnesota’s environment and natural resources. These data are part of a larger benthic mapping project to help support management of native mussel habitats in Minnesota. The Saint Croix National Scenic Riverway (SACN) is one of six Minnesota's National Parks that has established high value habitat corridors for threatened and endangered native mussels, including the Winged Mapleleaf and Higgins Eye Pearlymussel. The 30 sidescan images represent the lower 30 river miles of the Saint Croix River, starting at the river's confluence with the Mississippi River.

美国国家公园管理局（National Park Service, NPS）与美国地质调查局（U.S. Geological Survey, USGS）合作，采集圣克罗伊河的水声数据（hydroacoustic data），用于生成高分辨率水深测绘（high-resolution bathymetry）成果与侧扫声呐图像（sidescan imagery）。合并后的数据集将为底栖生境（benthic habitat）的特征描述提供核心支撑要素。美国国家公园管理局亟需此类信息，以更精准地评估影响本土蚌类（native mussel）分布的环境因子。本项目由明尼苏达州资源立法公民委员会（Legislative-Citizen Commission on Minnesota Resources, LCCMR）下设的环境与自然资源信托基金（Environment and Natural Resources Trust Fund, ENRTF）资助，旨在维护并改善明尼苏达州的环境与自然资源状况。本次采集的数据隶属于一项更大规模的底栖测绘项目，用以支撑明尼苏达州本土蚌类生境的管理工作。圣克罗伊国家风景河道（Saint Croix National Scenic Riverway, SACN）是明尼苏达州六座国家公园之一，其为受威胁与濒危的本土蚌类构建了高价值生境廊道，涵盖翅枫蚌（Winged Mapleleaf）与希金斯眼珍珠蚌（Higgins Eye Pearlymussel）等物种。本次的30幅侧扫声呐图像覆盖圣克罗伊河下游30英里河段，起点为该河与密西西比河的汇流处。