Naslov
Water flow in karst soil: implementing preferential flows in one-dimensional model

Autori
Švob, Mirna ; Domínguez-Villar, David ; Krklec Kristina

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, ostalo

Izvornik
Regional karstology - local and general aspects / Blatnik, Matej ; Gabrovšek, Franci ; Mayaud, Cyril ; Mihevc, Andrej ; Petrič, Metka ; Ravbar, Nataša ; Zupan Hajna, Nadja - Postojna : Znanstvenoraziskovalni center SAZU, 2021, 129-129

ISBN
978-961-05-0556-3

Skup
29th International Karstological School “Classical Karst”: Speleology

Mjesto i datum
Postojna, Slovenija, 14.06.2021. - 18.06.2021

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
hydrological model, karst soil, preferential flows, soil moisture

Sažetak
Due to high secondary porosity, karst areas are characterized by rapid water infiltration into the underground. Therefore, soil cover plays an important role since it is the first media that controls the amount and quality of water on its path to the aquifer. To better understand processes that impact water distribution and transport through soil cover, one-dimensional model at daily resolution was developed, which simulates water content at 6 levels in a 50 cm deep soil. The study site is located in central Spain (40°9′15″N, 5°4′20″W) and is characterized by red soil rich in iron minerals that is half meter thick and overlies metamorphosed carbonates. At a soil monitoring station, sensors are measuring soil water content every three hours, at depths of 10, 20, 30, 40 and 50 cm. Amount of precipitation, temperature, relative humidity, air pressure, wind velocity and direction are recorded every 10 minutes at a meteorological station installed at a study location. To determine basic soil properties, laboratory analyses were performed. Model is developed by using modified water balance equation, where assumed initial soil water content, precipitation, actual evapotranspiration and percolation are used as input parameters, while modelled soil water content represents the output parameter. Preliminary results show that preferential flows are important mechanisms of water flow through karst soil, which implies that water is rapidly and almost directly infiltrated from the soil surface to deeper soil sections. Correlation coefficients show strong positive relationship between measured and modelled results. Once the model will be completed, simulated soil water content and temperature records will be used as input parameters for CO2 concentration and transport model.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Biotehnologija

POVEZANOST RADA