Estimativa da umidade de solo na zona radicular a partir de dados de sensoriamento remoto
| Autor: | Marcus Vinícius Cândido Bezerra, Tantravahi Venkata Ramana Rao, J. R. C. Bezerra, Bernardo Barbosa da Silva, Carlos Antonio Costa dos Santos, Bergson Guedes Bezerra, Aldrin Martin Perez-Marin |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Hydrology
SEBAL relação-padrão evaporative fraction Energy balance Soil Science Soil science Vegetation energy balance fluxo de calor latente lcsh:S1-972 latent heat flux Soil water balanço de energia Environmental science DNS root zone fração evaporativa Bowen ratio Empirical relationship lcsh:Agriculture (General) Agronomy and Crop Science Water content standard relationship Remote sensing |
| Zdroj: | Revista Brasileira de Ciência do Solo, Vol 37, Iss 3, Pp 596-603 (2013) ResearcherID Revista Brasileira de Ciência do Solo, Volume: 37, Issue: 3, Pages: 596-603, Published: JUN 2013 Revista Brasileira de Ciência do Solo v.37 n.3 2013 Revista Brasileira de Ciência do Solo Sociedade Brasileira de Ciência do Solo (SBCS) instacron:SBCS |
| ISSN: | 1806-9657 |
| Popis: | Field-based soil moisture measurements are cumbersome. Thus, remote sensing techniques are needed because allows field and landscape-scale mapping of soil moisture depth-averaged through the root zone of existing vegetation. The objective of the study was to evaluate the accuracy of an empirical relationship to calculate soil moisture from remote sensing data of irrigated soils of the Apodi Plateau, in the Brazilian semiarid region. The empirical relationship had previously been tested for irrigated soils in Mexico, Egypt, and Pakistan, with promising results. In this study, the relationship was evaluated from experimental data collected from a cotton field. The experiment was carried out in an area of 5 ha with irrigated cotton. The energy balance and evaporative fraction (Λ) were measured by the Bowen ratio method. Soil moisture (θ) data were collected using a PR2 - Profile Probe (Delta-T Devices Ltd). The empirical relationship was tested using experimentally collected Λ and θ values and was applied using the Λ values obtained from the Surface Energy Balance Algorithm for Land (SEBAL) and three TM - Landsat 5 images. There was a close correlation between measured and estimated θ values (p |
| Databáze: | OpenAIRE |
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