NUMERICAL SOLUTION OF THE RICHARDS EQUATION BASED CATCHMENT RUNOFF MODEL WITH DD-ADAPTIVITY ALGORITHM AND BOUSSINESQ EQUATION ESTIMATOR

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F17%3A74523" target="_blank" >RIV/60460709:41330/17:74523 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1556/606.2017.12.1.3" target="_blank" >http://dx.doi.org/10.1556/606.2017.12.1.3</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1556/606.2017.12.1.3" target="_blank" >10.1556/606.2017.12.1.3</a>

Jazyk výsledku

angličtina

Název v původním jazyce

NUMERICAL SOLUTION OF THE RICHARDS EQUATION BASED CATCHMENT RUNOFF MODEL WITH DD-ADAPTIVITY ALGORITHM AND BOUSSINESQ EQUATION ESTIMATOR

Popis výsledku v původním jazyce

This paper presents a pseudo-deterministic catchment runoff model based on the Richards equation model - the governing equation for subsurface flow. The subsurface flow in a catchment is described here by two-dimensional variably saturated flow (unsaturated and saturated). The governing equation is the Richards equation with a slight modification of the time derivative term, as considered e.g. by Neuman. The nonlinear nature of this problem appears in the unsaturated zone only, so it was possible to make use of adaptive domain decomposition algorithm. However delineating of the saturated zone boundary is a nonlinear computationally expensive issue. The simple one-dimensional Boussinesq equation was used here as a rough estimator of the saturated zone boundary. With this estimate the adaptive domain decomposition could always start with an optimal subdomain split, and thus it is now possible to avoid solving huge systems of linear equations in the initial iteration level. With this measure

Název v anglickém jazyce

NUMERICAL SOLUTION OF THE RICHARDS EQUATION BASED CATCHMENT RUNOFF MODEL WITH DD-ADAPTIVITY ALGORITHM AND BOUSSINESQ EQUATION ESTIMATOR

Popis výsledku anglicky

This paper presents a pseudo-deterministic catchment runoff model based on the Richards equation model - the governing equation for subsurface flow. The subsurface flow in a catchment is described here by two-dimensional variably saturated flow (unsaturated and saturated). The governing equation is the Richards equation with a slight modification of the time derivative term, as considered e.g. by Neuman. The nonlinear nature of this problem appears in the unsaturated zone only, so it was possible to make use of adaptive domain decomposition algorithm. However delineating of the saturated zone boundary is a nonlinear computationally expensive issue. The simple one-dimensional Boussinesq equation was used here as a rough estimator of the saturated zone boundary. With this estimate the adaptive domain decomposition could always start with an optimal subdomain split, and thus it is now possible to avoid solving huge systems of linear equations in the initial iteration level. With this measure

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

10501 - Hydrology

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Pollack Periodica

ISSN

1788-1994

e-ISSN

—

Svazek periodika

12

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

16

Strana od-do

29-44

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85018735878