干旱/半干旱农业流域土壤水-植物、地下水和地表水系统耦合模拟的机械分布式模型（SurfMOD）——模型描述与评价

IF 6.3 1区地球科学 Q1 ENGINEERING, CIVIL

Journal of Hydrology Pub Date : 2025-07-11 DOI:10.1016/j.jhydrol.2025.133890

Danning Mu , Xu Xu , Xue Xiao , Tiago B. Ramos , Chen Sun , Xinyi Li , Yihao Xun , Guanhua Huang

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引用次数: 0

摘要

干旱/半干旱农业流域的水文过程由于水文循环内部的强烈相互作用和农业活动的影响而难以准确模拟。本文介绍了一种新的机械分布式水文模型（SurfMOD），该模型可以有效地模拟渗透带、地下水、地表水、植物中的水盐动态及其时空相互作用。基于偏微分方程的数值解对这一过程进行了模拟，并提出了一种实用的时空耦合方法以保证计算效率。此外，SurMOD还提供了考虑各种农业实践的功能（例如，地表覆盖、土壤带、运河渗漏和多级排水系统）。利用黄河上游典型干旱/半干旱农业区的观测数据对SurfMOD进行了验证：2012-2013年试验点（长江运河指挥区）；2021年实现区域尺度面积（济源市灌溉系统）。结果表明，土壤含水量和盐度浓度、地下水深度、沟渠排水速率和叶面积指数的决定系数（R2）分别超过0.44、0.39、0.38和0.87。Nash-Sutcliffe效率是令人满意的，在两个案例研究中，均方根误差都是可接受的低。此外，通过灌溉场景测试和与以往研究的对比，SurfMOD在模拟精度和计算效率方面都具有显著优势。总体而言，SurfMOD增强了水文模型模拟干旱/半干旱农业流域完整水循环和植物生长耦合过程的能力。它可以成为干旱/半干旱农业生态系统定量分析、情景预测以及有效管理区域用水和盐度控制的宝贵工具。

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A mechanistic, distributed model for coupled simulation of soil water-plant, groundwater and surface flow system in arid/semi-arid agricultural watersheds (SurfMOD)—Model description and evaluation

Hydrological processes in arid/semi-arid agricultural watersheds are challenging to simulate accurately due to the strong interactions within the hydrological cycle and the influences of agricultural activities. This paper introduces a new mechanistic, distributed hydrological model (named SurfMOD), developed to effectively simulate the dynamics of water and salt in the vadose zone, groundwater, surface water, plant, and their interactions over time and space. The processes are simulated based on the numerical solution of partial differential equations and a practical spatiotemporal coupling method is proposed to ensure the computational efficiency. In addition, SurMOD provides functions to consider various agricultural practices (e.g., surface mulching, soil bunds, canal seepage, and multi-order drainage system). SurfMOD was tested using observed data from typical arid/semi-arid agricultural areas in the upper Yellow River basin: an experimental site (Yangchang canal command area, YCA) during 2012–2013; and a region-scale area (Jiyuan Irrigation System, Jiyuan) in 2021. The results showed excellent agreement between the simulations and observed data, with coefficients of determination (R²) exceeding 0.44, 0.39, 0.38, and 0.87 for soil water content and salinity concentration, groundwater level, ditch drainage rate, and leaf area index, respectively. The Nash-Sutcliffe Efficiency was satisfactory, and the root mean square error was acceptably low in both case studies. Furthermore, the irrigation scenario tests and comparisons to previous studies demonstrate that SurfMOD offers significant advantages in both simulation accuracy and computational efficiency. Overall, SurfMOD enhances the capability of hydrological models to simulate coupled processes of complete water cycling and plant growth in arid/semi-arid agricultural watersheds. It could become a valuable tool for the quantitative analysis of arid/semi-arid agro-ecosystems, scenario forecasting, and the efficient management of water use and salinity control on a regional scale.

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来源期刊

Journal of Hydrology 地学-地球科学综合

CiteScore

11.00

自引率

12.50%

发文量

1309

审稿时长

7.5 months

期刊介绍： The Journal of Hydrology publishes original research papers and comprehensive reviews in all the subfields of the hydrological sciences including water based management and policy issues that impact on economics and society. These comprise, but are not limited to the physical, chemical, biogeochemical, stochastic and systems aspects of surface and groundwater hydrology, hydrometeorology and hydrogeology. Relevant topics incorporating the insights and methodologies of disciplines such as climatology, water resource systems, hydraulics, agrohydrology, geomorphology, soil science, instrumentation and remote sensing, civil and environmental engineering are included. Social science perspectives on hydrological problems such as resource and ecological economics, environmental sociology, psychology and behavioural science, management and policy analysis are also invited. Multi-and interdisciplinary analyses of hydrological problems are within scope. The science published in the Journal of Hydrology is relevant to catchment scales rather than exclusively to a local scale or site.