Notes for Applying Well-Water Use Results:
1. The calculation is based on "normal"
climate conditions for the specified weather station and "clean"
cultivation (i.e. no actively growing cover crop).
2. The calculated well water use for the week
should be multiplied by the percentage of well-water use intended for a
specific vineyard. The weekly water use will be
decreased by the degree of RDI. If
the degree of RDI is intended to be 70%, then the weekly water use should be
multiplied by 0.70.
3. The calculated
well-water use for the week is for an irrigation system that distributes
water with a 100% uniformity. Therefore, the weekly water use should
be increased by the estimated Distribution Uniformity (DU) of a specific
system. This is done by dividing the calculated weekly use by the DU.
If an irrigation system has a DU of 80%, then the weekly water use should be
divided by 0.8.
4. A beginning date for calculations is
limited to May 1 or later since the equations developed through research
tend to over predict water use very early in the growing season
Disclaimer:
The calculation of grapevine well-water use is intended as a
guideline for growers. California AgQuest Consulting assumes no
liability for the application of this information to a specific vineyard
situation. Factors that can influence local conditions include the
soil chemistry and/or the presence of soil pests. In addition to
understanding local conditions for a specific vineyard, the implementation
of an irrigation strategy should be supported by monitoring the status of
both the soil moisture and vine stress.
|