evandethier/global-river-mining

<strong>Data files for analyzing the effects of gold and precious mineral mining in river systems. </strong>This work is a global-scale application of satellite remote sensing of river water quality, particularly of suspended sediment in rivers. The project is summarized (and version control more rigorously maintained) at https://github.com/evandethier/global-alluvial-mining. All files necessary for producing the results are in the imports.zip file. All R Code to do these analyses are in the R.zip file. <em>If the files in the imports folder are arranged in the correct structure</em>, running the R files in sequence will produce the findings and most figures. All Google Earth Engine code is in the GEE.zip file. However, all the outputs generated by the GEE code are in the imports.zip file. I suggest beginning a new R project. It's important that you put the imports folder in the folder where you create the R project. The imports folder must be called `imports` and all sub-folders must also keep their names. <strong>Note that this code will create new folders and files on your computer. </strong>However, it does not delete pre-existing files. Some help navigating can be provided by the following spreadsheets: Where files are created and imported is given in `global_river_mining_where_files_are_in_code.xlsx` Where figures are created is given in `global_river_mining_where_figs_are_in_code.xlsx` -- Evan Dethier, 1 May 2023 https://github.com/evandethier * * * Related work has been published here: <strong>Applications:</strong> Dethier, E. N., Renshaw, C. E., &amp; Magilligan, F. J. (2022). Rapid changes to global river suspended sediment flux by humans. <em>Science, 376</em>(6600), 1447-1452. DOI: 10.1126/science.abn798 Dethier, E. N., Sartain, S. L., &amp; Lutz, D. A. (2019). Heightened levels and seasonal inversion of riverine suspended sediment in a tropical biodiversity hot spot due to artisanal gold mining. <em>Proceedings of the National Academy of Sciences of the United States of America, 116</em>(48), 23936-23941. doi:10.1073/pnas.1907842116 <strong>Methods: </strong> Dethier, E. N., Renshaw, C. E., &amp; Magilligan, F. J. (2020). Toward Improved Accuracy of Remote Sensing Approaches for Quantifying Suspended Sediment: Implications for Suspended-Sediment Monitoring. <em>Journal of Geophysical Research: Earth Surface, 125</em>(7), e2019JF005033. doi:10.1029/2019jf005033<strong>用于分析河流系统中金与贵金属采矿影响的数据文件。</strong> 本研究将卫星遥感（satellite remote sensing）技术应用于全球尺度的河流水质分析，尤其聚焦于河流悬浮沉积物（suspended sediment）监测。该项目的详细内容与严格的版本控制管理可参见：https://github.com/evandethier/global-alluvial-mining。生成研究结果所需的全部文件均存放于`imports.zip`压缩包中，完成相关分析的所有R代码（R Code）则收纳于`R.zip`压缩包内。<em>若`imports`文件夹内的文件已按正确结构排布</em>，按顺序运行R代码即可复现研究发现与多数图表。所有谷歌地球引擎（Google Earth Engine）代码均存放于`GEE.zip`压缩包中。不过，由GEE代码生成的全部输出结果均已包含在`imports.zip`压缩包中。建议新建一个R项目（R project），将`imports`文件夹置于该R项目的根目录下，且`imports`文件夹必须保留原名，其所有子文件夹也需维持原有命名。<strong>请注意，本代码将在您的计算机上创建新的文件夹与文件，但不会删除已存在的文件。</strong> 以下两份电子表格可帮助您定位文件生成与导入路径：`global_river_mining_where_files_are_in_code.xlsx`记录了文件的创建与导入位置；`global_river_mining_where_figs_are_in_code.xlsx`则说明了图表的生成位置。 —— Evan Dethier, 2023年5月1日 https://github.com/evandethier * * * 相关研究成果已发表如下： <strong>应用类研究：</strong> 1. Dethier, E. N., Renshaw, C. E., & Magilligan, F. J. (2022). 人类活动引发全球河流悬浮泥沙通量快速变化。<em>《科学》（Science）</em>，376(6600)，1447-1452. DOI: 10.1126/science.abn798 2. Dethier, E. N., Sartain, S. L., & Lutz, D. A. (2019). 手工金矿开采导致热带生物多样性热点区域河流悬浮沉积物浓度升高及季节反转。<em>《美国国家科学院院刊》（Proceedings of the National Academy of Sciences of the United States of America）</em>，116(48)，23936-23941. doi:10.1073/pnas.1907842116 <strong>方法类研究：</strong> Dethier, E. N., Renshaw, C. E., & Magilligan, F. J. (2020). 提升遥感法量化悬浮沉积物的精度：对悬浮泥沙监测的启示。<em>《地球物理研究杂志：地球表面》（Journal of Geophysical Research: Earth Surface）</em>，125(7), e2019JF005033. doi:10.1029/2019jf005033