Model Scripts for "Old-Aged Groundwater Contributes to Mountain Hillslope Hydrologic Dynamics"

The partitioning of water inputs between deep and shallow groundwater flow paths is a fundamental processes, yet is challenging to observe. Numerical models provide a valuable tool to further develop insights on these groundwater mixing processes. This repository contains scripts to run the ParFlow-CLM and EcoSLIM integrated hydrologic models along the Pumphouse Hillslope in the East River Watershed and associated python scripts to process model outputs. Files includes input decks for the associated models, python scripts, and text and css files to support the model runs and processing. The 2-D hillslope model simulates from 2000 to 2021 using transient forcing conditions from the publicly available NLDAS-2 dataset. We develop an ensemble of models with variable hydrogeologic and soil parameters. Model outputs from the ensemble of runs are compared to to water level observations at the PLM1 and PLM6 wells published at (https://data.ess-dive.lbl.gov/view/doi:10.15485/1866836) and groundwater mean ages published at (https://data.ess-dive.lbl.gov/datasets/doi:10.15485/1960042. The model results are used to evaluate hillslope water mass-balance transience and mixing dynamics between groundwater flow paths with young (<10 year) and old (>10 year) ages.水体补给在深层与浅层地下水流路径间的分配是一项核心水文过程，却难以通过直接观测获取准确结果。数值模型为深入理解此类地下水混合过程提供了极具价值的研究工具。本数据集仓库包含用于在东河流域泵房山坡运行ParFlow-CLM与EcoSLIM耦合水文模型的脚本，以及用于处理模型输出结果的配套Python脚本。仓库内文件涵盖上述模型的输入配置文件、Python脚本，以及用于支撑模型运行与后处理的文本文件与层叠样式表（CSS）文件。本二维山坡模型采用公开可得的北美陆面数据同化系统第二版（NLDAS-2）数据集的瞬态强迫条件，模拟了2000年至2021年的水文过程。我们构建了一组水文地质参数与土壤参数存在差异的模型集合。本集合模拟得到的模型输出结果，将与发表于https://data.ess-dive.lbl.gov/view/doi:10.15485/1866836的PLM1、PLM6两口井的水位观测数据，以及发表于https://data.ess-dive.lbl.gov/datasets/doi:10.15485/1960042的地下水平均年龄数据进行对比。本次模拟结果将用于评估山坡水文质量平衡的瞬态特征，以及年龄小于10年的年轻地下水流与年龄大于10年的年老地下水流之间的混合动力学过程。