Geodatabase containing bathymetric and LiDAR data for Norfork Lake, Arkansas-Missouri, 2015.

A bathymetric survey of Norfork Lake, Arkansas-Missouri, was conducted in September-October, 2015, by the Lower Mississippi-Gulf Water Science Center of the U.S. Geological Survey (USGS) using methodologies for multi-beam sonar surveys similar to those described by Lee (2013) and Huizinga (2016). Point (XYZ) data from the bathymetric survey were merged with XYZ data collected during a March 2008 aerial LiDAR survey provided by the U.S. Army Corps of Engineers, Little Rock District and stored in a feature dataset within the geodatabase. A terrain (digital terrain model, or DTM) was created from the XYZ data and stored in the geodatabase. Products derived from the DTM and stored in the geodatabase include a digital elevation model (DEM), a feature class of elevation contours, a table of surface area and storage capacity (volume) of the lake, and a Python script used to incrementally compute the storage capacity. References: Lee, 2013, Estimation of reservoir storage capacity using multibeam sonar and terrestrial LiDAR, Randy Poynter Lake, Rockdale County, Georgia, 2012: U.S. Geological Survey Scientific Investigations Map 3265, 1 sheet, https://pubs.usgs.gov/sim/3265/; Huizinga, 2016, Bathymetric and velocimetric surveys at highway bridges crossing the Missouri River near Kansas City, Missouri, June 2–4, 2015: U.S. Geological Survey Scientific Investigations Report 2016–5061, 93 p., http://dx.doi.org/10.3133/sir20165061.

2015年9—10月，美国地质调查局（U.S. Geological Survey，USGS）下属下密西西比-墨西哥湾水科学中心，针对阿肯色州-密苏里州的诺福克湖开展了水深测量作业，所用多波束声呐测量方法与Lee（2013）、Huizinga（2016）的相关描述一致。
本次水深测量获取的XYZ点数据，与美国陆军工程兵团小石河区提供的2008年3月航空激光雷达（LiDAR）测量所采集的XYZ点数据进行融合，最终存储于地理数据库的要素数据集（feature dataset）中。
基于上述融合后的XYZ点数据，创建了数字地形模型（digital terrain model，DTM）并存储于该地理数据库内。
从该数字地形模型衍生并存储于地理数据库中的成果包括：数字高程模型（digital elevation model，DEM）、高程等值线要素类（feature class）、湖泊表面积与蓄水量（体积）统计表，以及用于增量计算蓄水量的Python脚本。
参考文献：
Lee, 2013，《利用多波束声呐与地面激光雷达估算水库蓄水量——佐治亚州罗克代尔县兰迪·波因特湖2012年调查》，美国地质调查局科学调查图3265，1幅，https://pubs.usgs.gov/sim/3265/；
Huizinga, 2016，《2015年6月2—4日密苏里州堪萨斯城附近跨密苏里河公路桥梁的水深与流速测量》，美国地质调查局科学调查报告2016–5061，共93页，http://dx.doi.org/10.3133/sir20165061。