irrigation methods, water quality and sanitary issues · 2017. 11. 15. · irrigation methods,...
TRANSCRIPT
Irrigation Methods, Water Quality and Sanitary Issues
Irrigation Methods, Water Quality and Sanitary Issues
Russell LillyMDHSS
Is it a real problem?
Irrigation water does not need to have the purity of domestic water unless it is used for domestic purposes, but it must be protected against gross contamination.
The solution is one of education. We, in this dry section of the United States, where irrigation is necessary, must separate our food from our feces,
It’s Just Water, Isn't it?It’s Just Water, Isn't it?
Irrigation waterPlants absorb more than just waterDifficult to remove 100% of debris
The KEYThe KEY
MatchCrop needs
– For growth and food safetyWater delivery methodWater quality
average monthly precipitation
0
1
23
4
5
6
1 2 3 4 5 6 7 8 9 10 11 12
Month
Inch
es
Series1
Do you need to irrigate this crop?Do you need to irrigate this crop?
Irrigation MethodsIrrigation Methods
SprayFlood / FurrowDripPray for rain
SpraySpray
CommonWater contacts entire plantMaintenance, spray headsNegative effect depends on source
Big gun application of dairy waste
Flood / FurrowFlood / Furrow
Common in the southLess expensiveCan be difficult to get even distributionNegative effect is dependant on source and type of plant
DripDrip
Pricey to installMaintenanceGreat for conservationNegative issues depend on type of plant
Water quality standards and treatmentWater quality standards and treatment
SourceSource
Identify water sources and potential means of contamination
Surface water & springsPrivate wellsMunicipal supply
Contamination from what?Harmful pathogens
– Ecoli, shigella, Hepatitis A, Salmonella– Warm blooded animals, livestock, wildlife, people
What to Use, What to UseWhat to Use, What to Use
Surface water is more vulnerable to contamination
Difficult to monitor and control
Karst TopographyKarst Topography
A Better ChoiceA Better Choice
Private well subject to construction and hydrology
Consider routine testingKeep records of testing
Safe, But Practical?Safe, But Practical?
Municipal water less prone to problemsTesting already taking place
Testing?Testing?
What to test forTotal coliformE-coli
Who can run the testMDHSS State Lab in Jeff CitySome Local health DepartmentsPrivate lab
Sampling method
More Potable Water?More Potable Water?
Non-Irrigation waterCooling, wash water, ice, pesticide application and frost protection
Water Supply ProtectionWater Supply Protection
Backflow preventionAir gapDevicesSeparation
Water Supply ProtectionWater Supply Protection
SummarySummary
Irrigation methodsWater sourcesWater testingWater supply protection