Expanding SWOT discharge series using the drainage area ratio method

This resource contains five R-markdown scripts that process and analyze the connections between MERIT Hydro River reaches of the Mississippi River for Surface Water and Ocean Topography (SWOT) satellite observable rivers. The first code calculates the cumulative amount of urban land area for each reach in the basin. The second code relates the reaches, linking them based on drainage area ratios between 0.01 and 100. It filters these relationships based on whether a SWOT measurement could be donated from one location to the other via the drainage area ratio method, dam locations, and the amount of urban area between locations. Then, the potential increase in SWOT observations throughout the basin is calculated. The third code takes 373 gauges in the river basin and calculates Kling-Gupta Efficiency (KGE) values assessing the potential of using the drainage area ratio method among the gauges. The fourth assesses the impact dams, reservoirs, and urban area have on KGE values obtained. Finally, the fifth code expands simulated SWOT time series using the qualified drainage area ratio method and compares the expansion to daily discharges by first transforming each time series into a Log Pearson Type III distribution. KGE values between quantiles of each distribution are calculated and the Kolmogorov-Smirnov and Student t significance tests are performed. These codes and their associated text files serve as the resources for the study, \"Leveraging river network topology and regionalization to expand SWOT-derived river discharge time series in the Mississippi River Basin\" (doi:10.3390/rs13081590).

本数据集包含5个R Markdown脚本，用于处理并分析密西西比河流域内MERIT Hydro河道河段之间的关联，以适配地表水与海洋地形（Surface Water and Ocean Topography，SWOT）卫星可观测河流的相关研究。第一个脚本用于计算该流域内每个河段的城市用地累计面积。第二个脚本用于关联各河段，基于0.01至100区间内的流域面积比建立河段间连接，并基于以下条件筛选这些关联：是否可通过流域面积比方法将一处的SWOT观测数据转移至另一处、大坝位置，以及两处之间的城市用地规模。随后计算整个流域内SWOT观测数据的潜在增长规模。第三个脚本针对该流域内的373个水文站，计算克林-古普塔效率（Kling-Gupta Efficiency，KGE）值，以评估在这些水文站间应用流域面积比方法的可行性。第四个脚本用于评估大坝、水库及城市用地对所得KGE值的影响。最后，第五个脚本采用合格的流域面积比方法扩充模拟的SWOT时间序列，并将扩充后的序列与日径流量数据进行比对：首先将每条时间序列转换为对数皮尔逊III型分布（Log Pearson Type III），随后计算各分布分位数间的KGE值，并开展柯尔莫哥洛夫-斯米尔诺夫检验与学生t显著性检验。本数据集包含的所有脚本及配套文本文件，均为论文《依托河网拓扑与区域化方法扩充密西西比河流域SWOT反演河道流量时间序列》（DOI:10.3390/rs13081590）的支撑资源。