Table of Contents Author Guidelines Submit a Manuscript
The Scientific World Journal
Volume 2015, Article ID 626545, 11 pages
http://dx.doi.org/10.1155/2015/626545
Research Article

TDR Technique for Estimating the Intensity of Evapotranspiration of Turfgrasses

1Institute of Environmental Protection and Development, Wrocław University of Environmental and Life Sciences, Plac Grunwaldzki 24, 50-363 Wrocław, Poland
2Department of Agroecosystems and Green Areas Management, Wrocław University of Environmental and Life Sciences, Plac Grunwaldzki 24, 50-363 Wrocław, Poland
3Distance Learning Center, Wrocław University of Environmental and Life Sciences, Plac Grunwaldzki 24A, 50-365 Wrocław, Poland
4Department of Metrology and Modelling of Agrophysical Processes, Institute of Agrophysics of the Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland
5Institute of Landscape Architecture, Wrocław University of Environmental and Life Sciences, Plac Grunwaldzki 24A, 50-365 Wrocław, Poland

Received 19 May 2015; Revised 17 August 2015; Accepted 18 August 2015

Academic Editor: Ki-Hyun Kim

Copyright © 2015 Grzegorz Janik et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The paper presents a method for precise estimation of evapotranspiration of selected turfgrass species. The evapotranspiration functions, whose domains are only two relatively easy to measure parameters, were developed separately for each of the grass species. Those parameters are the temperature and the volumetric moisture of soil at the depth of 2.5 cm. Evapotranspiration has the character of a modified logistic function with empirical parameters. It assumes the form , where: is evapotranspiration [mm·h−1], is volumetric moisture of soil at the depth of 2.5 cm [m3·m−3], is soil temperature at the depth of 2.5 cm [°C], and A, B, and C are empirical coefficients calculated individually for each of the grass species [mm·h1], and [—], [(m3·m−3·°C)−1]. The values of evapotranspiration calculated on the basis of the presented function can be used as input data for the design of systems for the automatic control of irrigation systems ensuring optimum moisture conditions in the active layer of lawn swards.