The water budget of irrigated pasture land near murray bridge, South Australia
✍ Scribed by J.W. Holmes; C.L. Watson
- Publisher
- Elsevier Science
- Year
- 1967
- Weight
- 634 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0002-1571
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✦ Synopsis
The components of the water budget of irrigated pasture land were measured at a locality about 35°S latitude. The techniques of measurement yielded a standard error of about 10~ of the total inventory, lncome, comprising rain and irrigation, was 2,100 ram/year. Expenditure was 2,060 mm, comprised of 1,140 mm evaporation and 920 mm drainage.
The evaporation, measured with the help of small lysimeters, was strongly correlated with measured net radiation. Three formulae for estimating evaporation, based upon combination principles (MCILROY and ANGUS, 1964) were tried. By suitable choice of the coefficient for introducing the effect of the drying power of the air into the formula it is possible to obtain a close estimate of evaporation. But the correlation is no better than the correlation between evaporation and net radiation.