Multi-decadal shoreline position, water level elevation and volumetric changes in the Gallocanta Lake (NE Spain)

The dataset presents a continuous mapping of the shoreline contours in the Gallocanta Lake (NE Iberian Peninsula, Spain) along the period 1984-2020 with a sub-weekly frequency (2-5 days) together with the associated water elevation and water volume. The shorelines were obtained with subpixel accuracy by applying the extraction system SHOREX on freely-available images acquired by the satellites Sentinel-2 (sensor MSI), Landsat 5 (TM), Landsat 7 (EMT+), and Landsat 8 (OLI). At the same time, the mean elevation of the water level and the volumetric changes were respectively assigned and deduced for the same dates. This constitutes a valuable data package for robust analysis of the lake trends, as well as the response to rainfall events. Shapefiles of the lake contour appear in vector format (WGS 1984 / UTM Zone 30N, EPSG code: 32630) containing the associated elevation and volumetric information of each date.本数据集涵盖1984年至2020年西班牙伊比利亚半岛东北部加洛坎塔湖（Gallocanta Lake）的岸线轮廓连续映射结果，采样频率为亚周级（2至5天），并同步配套相关水位高程与水体体积数据。研究团队通过将SHOREX岸线提取系统应用于哨兵-2号（Sentinel-2，搭载MSI多光谱传感器）、陆地卫星5号（Landsat 5，TM）、陆地卫星7号（Landsat 7，EMT+）及陆地卫星8号（Landsat 8，OLI）获取的公开可用影像，以亚像素精度完成岸线提取。与此同时，针对上述影像对应的同一观测日期，研究人员分别赋值并推算了平均水位高程与水体体积变化量。本数据集可为湖泊演化趋势的稳健分析以及湖泊对降雨事件的响应研究提供极具价值的科研数据包。湖泊岸线的矢量格式Shapefile文件采用WGS 1984 / UTM 30N坐标系（EPSG代码：32630），其中包含各观测日期对应的高程与体积信息。