The impact of sensitivity and uncertainty of soil physical parameters on the terms of the water balance: Some case studies with default R packages. Part I: Theory, methods and case descriptions
| Autor: | Joop G Kroes, Francisco Damiano, Jan G. Wesseling, Thalita Campos Oliveira |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Water en Landgebruik Test data generation Computation IRS LHS Horticulture 01 natural sciences Numerical model Water balance Soil Bodem Soil Water and Land Use Sensitivity Hydraulic conductivity Applied mathematics Water content Mathematics Water and Land Use SWAP Uncertainty Forestry Sobol 04 agricultural and veterinary sciences Bodemfysica en Landbeheer Bodem Water en Landgebruik Computer Science Applications Soil Physics and Land Management Latin hypercube sampling HPC 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Saturation (chemistry) Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Computers and Electronics in Agriculture, 170 Computers and Electronics in Agriculture 170 (2020) |
| ISSN: | 0168-1699 |
| Popis: | These papers (part I and part II) emphasize the need for sensitivity and uncertainty analyses. A number of techniques are applied, e.g. latin hypercube sampling, impact response surfaces and Sobol-analyses. Five examples are presented, four of them concerning the numerical model SWAP. The data generation and analysis is performed with standard R packages. Although the computations can be made on any computer, the most time-consuming examples in this paper have been run on a High Performance Computer Cluster. With the relatively simple Impact Response Surface technique it is shown that variation of the saturated hydraulic conductivity has far less impact than changing the moisture content at saturation. Analyses according to the Sobol-Jansen method show that when the soil physical relationships are described according to Damiano, then the parameter b has a very large influence on the results. If the well-known Mualem - Van Genuchten equations are applied, most variation can be explained by the parameter n. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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