| dc.contributor.author |
Poulovassilis, A |
en |
| dc.contributor.author |
Anadranistakis, M |
en |
| dc.contributor.author |
Liakatas, A |
en |
| dc.contributor.author |
Alexandris, S |
en |
| dc.contributor.author |
Kerkides, P |
en |
| dc.date.accessioned |
2014-06-06T06:44:43Z |
|
| dc.date.available |
2014-06-06T06:44:43Z |
|
| dc.date.issued |
2001 |
en |
| dc.identifier.issn |
03783774 |
en |
| dc.identifier.uri |
http://dx.doi.org/10.1016/S0378-3774(01)00121-4 |
en |
| dc.identifier.uri |
http://62.217.125.90/xmlui/handle/123456789/2027 |
|
| dc.subject |
Actual evapotranspiration |
en |
| dc.subject |
Soil water balance |
en |
| dc.subject.other |
crop plant |
en |
| dc.subject.other |
empirical analysis |
en |
| dc.subject.other |
estimation method |
en |
| dc.subject.other |
evapotranspiration |
en |
| dc.subject.other |
soil water |
en |
| dc.subject.other |
Greece |
en |
| dc.subject.other |
Gossypium hirsutum |
en |
| dc.subject.other |
Triticum aestivum |
en |
| dc.subject.other |
Zea mays |
en |
| dc.title |
Semi-empirical approach for estimating actual evapotranspiration in Greece |
en |
| heal.type |
journalArticle |
en |
| heal.identifier.primary |
10.1016/S0378-3774(01)00121-4 |
en |
| heal.publicationDate |
2001 |
en |
| heal.abstract |
Reliable estimation of actual evapotranspiration rates (ET) may be achieved if extensive information on the soil-plant-atmosphere system is available. Agricultural and irrigation engineers facing the problem of rational irrigation planning, rarely have at their disposal such information. Therefore, there is a demand for simpler approaches to estimate actual evapotranspiration. In this paper, a semi-empirical approach is proposed for estimating actual water losses from crops. It is assumed that the ratio of actual to maximum evapotranspiration (ET/ET m) is an exponential function of the water content w in the root-zone, of the form: ET/ET m = exp[c(w- W fc)/ (w - W wp)], where c is a constant introduced to adjust the decrease of the ratio ET/ET m according to what is observed for the climatic conditions, soils and crops of Greece, w fc the water content at field capacity and W wp denotes the water content at wilting point. Verification of the above approach for estimating actual evapotranspiration was achieved by comparing ET-values obtained by the soil moisture profile changes and the ET-values obtained by the above equation. Meteorological, crop and soil data required were collected from experimental fields of the Agricultural University of Athens (38°23′N, 23°6′E). The agreement of actual versus computed ET-values for three widely grown crops in Greece (cotton, wheat and maize) may be considered as satisfactory. © 2001 Elsevier Science B.V. All rights reserved. |
en |
| heal.journalName |
Agricultural Water Management |
en |
| dc.identifier.issue |
2 |
en |
| dc.identifier.volume |
51 |
en |
| dc.identifier.doi |
10.1016/S0378-3774(01)00121-4 |
en |
| dc.identifier.spage |
143 |
en |
| dc.identifier.epage |
152 |
en |