Evaluating Richards Equation and Infiltration Capacity Approaches in Mesoscale Hydrologic Modeling

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F25%3A102098" target="_blank" >RIV/60460709:41330/25:102098 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1029/2024WR039625" target="_blank" >https://doi.org/10.1029/2024WR039625</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2024WR039625" target="_blank" >10.1029/2024WR039625</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evaluating Richards Equation and Infiltration Capacity Approaches in Mesoscale Hydrologic Modeling

Popis výsledku v původním jazyce

This study compares two widely used approaches for modeling soil moisture (SM) infiltration in mesoscale hydrology: the one-dimensional Richards equation (1D RE), which governs vertical flux exchange but is nonlinear and computationally demanding, and the infiltration capacity (IC) scheme, which is simpler and restricts SM movement to the downward direction. A major challenge in implementing the RE is the estimation of effective parameters at the typical model resolution (hundreds to thousands of meters), as the equation was originally developed for finer scales. To address this, we conducted experiments using the mHM model with Multiscale Parameter Regionalization (MPR) to parameterize both RE and IC approaches. The RE parameterization relied on three distinct pedo-transfer functions (PTFs). Parameters were estimated across 201 basins in Germany and evaluated using streamflow data at multiple spatial resolutions, as well as in situ SM observations from 46 sites (0-25 cm) and 42 sites (25-60 cm and 0-60 cm). Results show that both mHM-IC and all mHM-RE variants perform comparably in streamflow prediction. The use of MPR enables the spatial transferability of PTF-based parameters. Owing to its two-way flux capability, the mHM-RE variant better captures SM dynamics, particularly in deeper soil layers. Although the IC scheme often leads to saturation at depth, it still provides strong performance in capturing SM anomalies. Overall, the study demonstrates that with appropriate parameterization, the RE approach can yield transferable parameters and robust simulations of both streamflow and soil moisture states.

Název v anglickém jazyce

Evaluating Richards Equation and Infiltration Capacity Approaches in Mesoscale Hydrologic Modeling

Popis výsledku anglicky

This study compares two widely used approaches for modeling soil moisture (SM) infiltration in mesoscale hydrology: the one-dimensional Richards equation (1D RE), which governs vertical flux exchange but is nonlinear and computationally demanding, and the infiltration capacity (IC) scheme, which is simpler and restricts SM movement to the downward direction. A major challenge in implementing the RE is the estimation of effective parameters at the typical model resolution (hundreds to thousands of meters), as the equation was originally developed for finer scales. To address this, we conducted experiments using the mHM model with Multiscale Parameter Regionalization (MPR) to parameterize both RE and IC approaches. The RE parameterization relied on three distinct pedo-transfer functions (PTFs). Parameters were estimated across 201 basins in Germany and evaluated using streamflow data at multiple spatial resolutions, as well as in situ SM observations from 46 sites (0-25 cm) and 42 sites (25-60 cm and 0-60 cm). Results show that both mHM-IC and all mHM-RE variants perform comparably in streamflow prediction. The use of MPR enables the spatial transferability of PTF-based parameters. Owing to its two-way flux capability, the mHM-RE variant better captures SM dynamics, particularly in deeper soil layers. Although the IC scheme often leads to saturation at depth, it still provides strong performance in capturing SM anomalies. Overall, the study demonstrates that with appropriate parameterization, the RE approach can yield transferable parameters and robust simulations of both streamflow and soil moisture states.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10501 - Hydrology

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

WATER RESOURCES RESEARCH

ISSN

0043-1397

e-ISSN

0043-1397

Svazek periodika

61

Číslo periodika v rámci svazku

JUL 30 2025

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

28

Strana od-do

1-28

Kód UT WoS článku

001540102800001

EID výsledku v databázi Scopus

2-s2.0-105012212499