Global River Obstruction Database v1.1

GROD v1.1 (filename: GROD_v1.1.csv), or Global River Obstruction Database version 1.1, contains 30549 manually identified human-made structures that obstructing river longitudinal flow. Obstructions have been identified on Google Earth Engine satellite map for all rivers mapped in the Global River Widths from Landsat (GRWL) database. Each obstruction has assigned one of the six types—Dam, Lock, Low head dam, Channel dam, Partial dam 1, Partial dam 2. Details of the mapping process and data quality can be found in the following publication: Yang, X., Pavelsky, T.M., Ross, M.R.V., Januchowski-Hartley, S.R., Dolan,W., Altenau, E.H., Belanger, M., Byron, D.K., Durand, M.T., Dusen, I.V., Galit, H., Jorissen, M., Langhorst, T., Lawton, E., Lynch, R., Mcquillan, K.A., Pawar, S., Whittemore, A., in revision. Mapping ow-obstructing structures on global rivers. Water Resources Research. The single csv file contain the version 1 of GROD that accompanying the above-mentioned publication. It contains 7 columns: grod_id: unique identifier (character) type: obstruction type (character) lon: longitude in decimal degrees (float) lat: latitude in decimal degrees (float) sword_reach_id1: nearest sword reach id (character) distance_to_sword: distance to the nearest sword reach (float) Note: 1. sword, or SWOT River Database (https://zenodo.org/record/3898570#.YU0urWZKhGo), is an improved version of GRWL with better topology. Majority of the GROD obstructions (N=30502) has been matched with the closest SWORD reach. The remaining 16 obstructions were further than 10km away from any SWORD reach and were not matched to SWORD. 2. GROD, along with many other large scale river obstructions databases, will be hosted on Global Dam Watch website (http://globaldamwatch.org/).GROD v1.1（文件名为GROD_v1.1.csv）即全球河流障碍物数据库（Global River Obstruction Database, GROD）v1.1版，收录了30549处经人工识别的、会阻碍河流纵向水流的人工构筑物。所有障碍物均依托谷歌地球引擎（Google Earth Engine）的卫星影像，在基于陆地卫星（Landsat）的全球河流宽度（Global River Widths from Landsat, GRWL）数据库绘制的全部河流上完成识别。每个障碍物被划分为以下6类之一：水坝、船闸、低水头坝、河道坝、部分坝1、部分坝2。 该数据集的制图流程与数据质量细节可参见下述处于修订阶段的论文：Yang, X.、Pavelsky, T.M.、Ross, M.R.V.、Januchowski-Hartley, S.R.、Dolan, W.、Altenau, E.H.、Belanger, M.、Byron, D.K.、Durand, M.T.、Dusen, I.V.、Galit, H.、Jorissen, M.、Langhorst, T.、Lawton, E.、Lynch, R.、Mcquillan, K.A.、Pawar, S.、Whittemore, A. 撰写的《全球河流水流阻碍构筑物制图》（原英文标题：Mapping flow-obstructing structures on global rivers），刊载于《Water Resources Research》。 本单一csv文件包含上述论文配套的GROD v1版本数据，共包含7个字段： 1. grod_id：唯一标识符（字符型） 2. type：障碍物类型（字符型） 3. lon：以十进制度为单位的经度（浮点型） 4. lat：以十进制度为单位的纬度（浮点型） 5. sword_reach_id1：最近的SWORD河段ID（字符型） 6. distance_to_sword：至最近SWORD河段的距离（浮点型） 注释： 1. SWORD即SWOT河流数据库（SWOT River Database, SWORD），公开网址为https://zenodo.org/record/3898570#.YU0urWZKhGo，该数据库是GRWL的改进版本，具备更优的拓扑结构。绝大多数GROD障碍物（N=30502）已匹配至最近的SWORD河段；剩余16处障碍物距离任意SWORD河段均超过10km，未完成SWORD匹配。 2. GROD将与其他诸多大型河流障碍物数据库一同托管于全球水坝观察网（Global Dam Watch），其公开网址为http://globaldamwatch.org/。