Search results for "HYDRUS-1D"
showing 3 items of 3 documents
Evaluating equilibrium and non-equilibrium transport of bromide and isoproturon in disturbed and undisturbed soil columns.
2007
19 pages; International audience; In this study, displacement experiments of isoproturon were conducted in disturbed and undisturbed columns of a silty clay loam soil under similar rainfall intensities. Solute transport occurred under saturated conditions in the undisturbed soil and under unsaturated conditions in the sieved soil because of a greater bulk density of the compacted undisturbed soil compared to the sieved soil. The objective of this work was to determine transport characteristics of isoproturon relative to bromide tracer. Triplicate column experiments were performed with sieved (structure partially destroyed to simulate conventional tillage) and undisturbed (structure preserve…
Assessing the performance of different model-based techniques to estimate water content in the upper soil layer
2016
he knowledge of soil water content (SWC) of the upper soil layer is important for most hydrological processes occurring over vegetated areas and under dry climate. Because direct field measurements of SWC are difficult, the use of different type of sensors and model-based approaches have been proposed and extensively used during the last decade. The main objective of this work is to assess the performance of two models estimating SWC of the upper soil layer: the transient line heat source method and the physically based Hydrus-1D model. The models' performance is assessed using field measurements acquired through a Time Domain Reflectometer (TDR). The experiment was carried out on an olive …
Viendimensionāls gruntsūdens līmeņa modelis Mazuikas ezera ūdens bilances novērtēšanai
2022
Bakalaura darbā paveikta Mazuikas ezera apkārtnes gruntsūdens līmeņa svārstību izpēte ar modelēšanas un simulācijas rīku HYDRUS-1D. Aizsargājamo ainavu apvidū “ĀDAŽI” tika veikti urbšanas darbi, nogulumu paraugu ievākšana, fotografēšana un pazemes ūdens līmeņa konstatēšana. Laboratorijā nogulumu paraugiem tika noteikta daļiņu izmēra sadalījuma sastāvs, kopējais un daļiņu blīvums, porainība, filtrācijas koeficients un organiskās vielas saturs. Tika veikta ūdens svārstību modelēšana un simulēšana ar HYDRUS-1D rīku, kā izejas datus izmantojot lauka un laboratorijas pētījumu rezultātus un E-OBS meteoroloģisko datu kopu. Iegūtais rezultāts tiks izmantots, lai pētītu Mazuikas ezera ūdens līmeņa s…