The PISCO-GR2M Monthly Streamflow Product for Peru (v2.0)

This product provides a national-scale dataset of simulated monthly streamflow across Peru, developed using the PISCO gridded precipitation and evapotranspiration dataset at 0.1° × 0.1° spatial resolution, coupled with the GR2M rainfall–runoff model and a river routing scheme. The dataset covers the entire Peruvian territory, including transboundary river basins shared with neighboring countries. The modeling framework generates mean daily discharge for 11,913 river reaches, enabling a fine-scale representation of hydrological conditions at the national level. Model calibration and validation were performed using observed daily streamflow records from 43 gauging stations over the period 1981–2020, ensuring consistency with observed hydrological dynamics. This dataset is designed to support hydrological analysis, monitoring, and decision-making, and will be regularly updated to incorporate new simulations and improvements.本产品提供覆盖秘鲁全境的逐月模拟径流数据集，该数据集基于空间分辨率为0.1°×0.1°的PISCO格点降水与蒸散发数据集，结合GR2M降雨-产流模型与河道汇流方案构建而成。该数据集覆盖秘鲁全部领土，包括与邻国共享的跨界流域。该建模框架为11913条河道河段生成日均径流量，从而可在国家尺度上精细表征水文状况。研究团队基于1981-2020年间43个水文站的实测日径流记录完成了模型率定与验证工作，确保数据集与实测水文动态保持一致。本数据集旨在为水文分析、监测与决策制定提供支撑，并将定期更新以纳入新的模拟结果与模型改进方案。