Water balance estimates of evaporation from ponded rice fields in a semi-arid region
1976; Elsevier BV; Volume: 1; Issue: 1 Linguagem: Inglês
10.1016/0378-3774(76)90010-x
ISSN1873-2283
Autores Tópico(s)Irrigation Practices and Water Management
ResumoEvaporation from ponded rice grown on fine-textured soils was calculated using a simple water balance equation, and compared with pan evaporation measured at a regional meteorological station. Crop/pan (Er/Ep) evaporation ratios showed seasonal trends, with values generally exceeding unity during the mid- to late-season ponding period. Mid-summer ratios of Er/Ep for two experimental fields were not significantly different from those reported in a previous study using a different experimental technique, but were higher on a third. On the average, evaporation over the whole ponding period equalled that from a Class A pan. The assumption that the infiltration or seepage term of the water balance may be neglected for fine-textured soils would seriously overestimate Er on one of the three experimental sites.
Referência(s)