Naslov
Modeling the Effect of Tillage and Urban Waste Compost Addition on Water Flow and Contaminant (Isoproturon, Cu, Cd) Transport in Agricultural Field Using HYDRUS-2D

Autori
Filipović, Vilim ; Coquet, Yves ; Pot, Valérie ; Cambier, Philippe ; Filipović, Lana ; Houot, Sabine ; Benoit, Pierre

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

Izvornik
HYDRUS Software Applications to Subsurface Flow and Contaminant Transport Problems / Jirka Šimůnek/Radka Kodešová - Prag, 2017, 20-20

ISBN
978-80-213-2749-8

Skup
5th International Conference HYDRUS Software Applications to Subsurface Flow and Contaminant Transport Problems

Mjesto i datum
Prag, Češka Republika, 30.03.2017. - 31.03.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
Tillage, Urban waste compost, IPU, Cd, Cu, Modeling, HYDRUS

Sažetak
Tillage practices and compost amendments modify soil structure and can create heterogeneity at the local scale within agricultural fields. Urban waste compost may contain certain contaminants e.g. trace metals, and also affect sorption and degradation processes of other contaminants (e.g. pesticides). Modeling was performed to evaluate how the presence of heterogeneity due to soil tillage and repeated compost application affects water flow, pesticide dynamics and trace metal mobility in soil in the long-term QualiAgro1 field experiment. Two experimental plots amended with a co-compost of sewage sludge and green wastes (SGW) or with a municipal solid waste compost (MSW) were compared with a control plot (CONT). In each plot, wick lysimeters, TDR probes and tensiometers were installed to monitor water and solute dynamics. In the ploughed layer, four zones differing in their structure were identified: compacted clods, non-compacted soil, interfurrows and the plow pan which were precisely reproduced in the HYDRUS-2D. Metals (Cu and Cd) soil mobility was modeled using sorption estimation based on equilibrium between CaCl2 and EDTA extractable metal concentrations or using equations based on pedotransfer functions. From 2004 to 2010, the unamended control (CONT) plot had the largest cumulative water outflow (1388 mm) compared to the MSW plot (962 mm) and SGW plot (979 mm). Continuous compost addition seems to limit downward water flow by preventing preferential flow. HYDRUS was able to describe cumulative water outflow with a model efficiency value of 0.99 for all three plots. The model was able to simulate isoproturon leaching patterns except for the large preferential flow events which were observed in the MSW and CONT plots immediately after pesticide application. Modeling results indicate that spatial and temporal variations in pesticide degradation rate due to tillage and compost application play a major role in isoproturon dynamics. Trace metal mobility simulation showed very limited metal mobility in the tilled layer even at high trace metal inputs rates due to high sorption to organic matter originating from compost addition.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

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