Prediction System for Soil Water Pressure Head

Arij Chmeis

Diplomová práce

Abstract:

Due to extremely high evaporation and low precipitation rates, water resources in arid regions around the world are limited. In addition to water scarcity, evaporation can cause several soil problems including increased soil salinity and decreased productive soil capacity. Water vapor diffusion accounts for a major transport of latent energy due to the evaporation and condensation processes, thus playing a substantial part in the evaporation phenomenon. Neglecting the effect of vapor transfer in moisture-heat interactions may lead to significant underestimation of soil evaporation. This research examines evaporation losses using a coupled liquid water, water vapor, and heat flow numerical model implemented in the open-source software DRUtES. Input to configuration files is automated by building Python scripts. Actual incoming shortwave radiation is estimated and the surface energy balance equation is solved to obtain the system's boundary conditions. The developed system is employed to investigate evaporation rates in an Argentinian vineyard. Predicted pressure head and soil temperature are compared with in-situ measurements to evaluate the system's performance.

Keywords

Evaporation modelling, Evaporation in vineyards, Pressure head prediction, Automation tools, Richards equation, Water content

Jazyk práce: angličtina

Datum vytvoření / odevzdání či podání práce: 31. 3. 2021

Obhajoba závěrečné práce

• Vedoucí: doc. Ing. Michal Kuráž, Ph.D.

Česká zemědělská univerzita v Praze

Fakulta životního prostředí

Magisterský studijní program / obor:
Krajinné inženýrství / Environmental Modelling