Elevation data used to analyze non-contemporaneity of flow events in ephemeral tributary junctions

This repository holds orthophotos and Digital Elevation Models (DEMs) derived from aerial imagery collected by drones at three confluences of ephemeral arroyos with the Rio Grande near Socorro, New Mexico, USA. The three arroyos are the Arroyo de la Parida, Arroyo de los Pinos, and Arroyo de las Canas, each of which flows westward toward the Rio Grande out of the hilly area known as the Quebradas. The data collection flights at the Pinos took place on seven dates: 03 July 2018, 29 July 2018, 07 September 2019, 08 June 2020, 01 August 2020, 06 September 2020, and 27 September 2020. The data collection flights at the Parida took place on three dates: 25 August 2019, 03 March 2020, and 27 September 2020. The data collection flights at the Canas took place on three dates: 23 August 2019, 19 July 2020, and 19 September 2020. All DEMs were derived using the Structure from Motion (SfM) photogrammetry technique, using the software MetaShape by Agisoft. The orthophotos were also generated using MetaShape. All data are stored as geospatially enabled .tif files, using the Central New Mexico State Plane Meters projection and the NAD83 datum. These data were used in an analysis of tributary junction morphology published under the title "Non-contemporaneity of flow events as a control on the morphology and sedimentary character of ephemeral tributary junctions" in the open access journal Geomorphica.本仓库存储了由无人机航拍获取的正射影像与数字高程模型（Digital Elevation Models, DEMs），数据采集自美国新墨西哥州索科罗附近、里奥格兰德河（Rio Grande）与三条季节性干河床的三处汇流处。三条干河床分别为阿拉里奥德拉帕里达（Arroyo de la Parida）、阿拉里奥德洛斯皮诺斯（Arroyo de los Pinos）与阿拉里奥德拉斯卡纳斯（Arroyo de las Canas），均从名为克布拉达斯（Quebradas）的丘陵地带流出，向西流淌并最终汇入里奥格兰德河。针对阿拉里奥德洛斯皮诺斯区域的数据采集飞行任务共开展7次，具体日期为2018年7月3日、2018年7月29日、2019年9月7日、2020年6月8日、2020年8月1日、2020年9月6日及2020年9月27日。针对阿拉里奥德拉帕里达区域的数据采集飞行任务共3次，日期为2019年8月25日、2020年3月3日与2020年9月27日。针对阿拉里奥德拉斯卡纳斯区域的数据采集飞行任务共3次，日期为2019年8月23日、2020年7月19日与2020年9月19日。所有数字高程模型均通过运动恢复结构（Structure from Motion, SfM）摄影测量技术，采用Agisoft公司的MetaShape软件生成。正射影像同样由MetaShape软件生成。所有数据均以支持地理空间信息的.tif格式存储，采用新墨西哥州中部平面坐标系（米制）与NAD83大地基准面。本数据集曾用于一项支流汇口形态分析研究，该研究以《流动事件非同时性对季节性支流汇口形态与沉积特征的调控作用》为题发表于开放获取期刊《Geomorphica》。