Uncertainty of Deardorff’s soil moisture model based on continuous TDR measurements for sandy loam soil

Title:

Uncertainty of Deardorff’s soil moisture model based on continuous TDR measurements for sandy loam soil

Creator:

Brandyk, Andrzej, Kiczko, Adam, Majewski, Grzegorz, Kleniewska, Małgorzata, and Krukowski, Marcin

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:c2bc14ad-9fe5-40a1-b9a8-2d24d96aa6c7
uuid:c2bc14ad-9fe5-40a1-b9a8-2d24d96aa6c7
doi:10.1515/johh-2016-0007

Subject:

soil moisture, modelling, parameters uncertainty, and GSA-GLUE analysis

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Knowledge on soil moisture is indispensable for a range of hydrological models, since it exerts a considerable influence on runoff conditions. Proper tools are nowadays applied in order to gain in-sight into soil moisture status, especially of uppermost soil layers, which are prone to weather changes and land use practices. In order to establish relationships between meteorological conditions and topsoil moisture, a simple model would be required, characterized by low computational effort, simple structure and low number of identified and calibrated parameters. We demonstrated, that existing model for shallow soils, considering mass exchange between two layers ( the upper and the lower), as well as with the atmosphere and subsoil, worked well for sandy loam with deep ground water table in Warsaw conurbation. GLUE (Generalized Likelihood Uncertainty Estimation) linked with GSA (Global Sensitivity Analysis) provided for final determination of parameter values and model confidence ranges. Including the uncertainty in a model structure, caused that the median soil moisture solution of the GLUE was shifted from the one optimal in deterministic sense. From the point of view of practical model application, the main shortcoming were the underestimated water exchange rates between the lower soil layer (ranging from the depth of 0.1 to 0.2 m below ground level) and subsoil. General model quality was found to be satisfactory and promising for its utilization for establishing measures to regain retention in urbanized conditions.

Language:

Slovak

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

23-29

Source:

Journal of hydrology and hydromechanics | 2016 Volume:64 | Number:1

Harvested from:

CDK

Metadata only:

false