Shrub rainfall interception map based on Gash Model, Trail Valley Creek Watershed, Northwest Territories [Canada], 2018

This dataset includes spatially distributed estimates of rainfall interception by birch shrub in an Arctic tundra area, the Trail Valley Creek watershed. The estimation map demonstrates the importance of rainfall interception in Arctic summer water balances, as well as the spatial variability in the amount of interception as controlled by the shrub leaf area index. The interception was estimated using the Gash interception model for sparse canopy, with climatic inputs from weather station records and shrub parameters derived from a satellite image. This dataset also contains the R script used for running and validating the model and producing the map.

本数据集涵盖北极苔原区域特雷尔谷溪流域（Trail Valley Creek watershed）内桦木灌丛降雨截留量的空间分布估算结果。该估算地图揭示了降雨截留在北极夏季水量平衡中的重要作用，同时展现了由灌丛叶面积指数（leaf area index）调控的截留量空间变异性。本次截留量估算采用适配稀疏冠层的盖奇截留模型（Gash interception model），气象输入数据取自气象站观测记录，灌丛参数则通过卫星影像提取得到。本数据集同时包含用于运行、验证该模型并生成上述估算地图的R脚本（R script）。