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Horticulture Irrigation Management 100 Hours Certificate Course
Horticulture Irrigation Management course online. Take your knowledge of irrigation systems further.! This course builds on skills achieved in the Irrigation modules to develop students' skills to manage the design and operation of large scale irrigation systems for horticultural applications.
Learning Goals: Irrigation Management (Horticulture) BHT305
- Devise ways to optimise water efficiency (ie. minimise wastage), during irrigation of plants
- Schedule irrigation for a large scale situation such as a large nursery, crop, turf, garden or pasture
- Analyse the design of different drainage systems
- Understand the operation of irrigation controllers and pumps for appropriate tasks
- Manage the maintenance of irrigation systems, both small and large scale
- Manage the fertigation of plants through an irrigation system
- Evaluate the design of large scale irrigation systems
- Design an irrigation system, including its drainage
Lesson Structure: Irrigation Management (Horticulture) BHT305
There are 8 lessons:
1 Waste water and recycling:
- Humans and Water
- Water and Plant Growth
- Minimising Plant Requirements
- Waste Water
- Types of Water Wastage: Evaporation, Seepage, Runoff, Overspray, Scheduling
- Recycling Waste Water
- Waste Water Treatment (Reed-Beds)
- Suitable Plants
2 Measuring water usage
- The Hydrological Cycle: Direct Fall onto the Land Surface, Intercepted Rainfall, Water Falling Directly into Water-Bodies
- Rainfall: Distribution, Variability, Frequency, Intensity, Evaporation, Effective Rainfall, Calculating Effective Rainfall
- Special Applications: Irrigation of Vines, Efficient Orchard Irrigation, Scheduling, Regulated Deficit Irrigation
- Measuring Soil Moisture
- Water Monitoring Equipment: Gypsum Blocks, Neutron Probe Meters, Tensiometers, Ceramic Block Sensors, Heat Sensor System, Dielectric Scanning Device, Applications
- Measuring Water Usage: Soil Characteristics, Unique Crop Requirements, Local Evapotranspiration Levels
- Drainage: Rainfall
- Improving Permeability During Construction: Cultivation, Adding Soil Ameliorants, Chemical Treatments
- Improving Surface Drainage After Construction: Sand Slitting, Aerating, Sub Soiling
- Layout of Drains: Outlet, Gradients, Distance Between Drainage Pipes, Depth Of Drains
- Types of Drains
- Laying the Drain
- Contingencies to Deal With Flood
4 Irrigation controllers
- Irrigation Controllers
- Controllers: Automatic Controllers, Time Clocks, Computerised Tap Controllers, Manual Controllers, Battery Powered Solenoid Valves
- Water Volumes and Duration
- Technical Data Sheet Mechanical Tap Timer
- Technical Data Sheet Electronic Tap Timer
- Pumps and Pressure Systems
- Types of Pumps: Table: Comparison Of Pump Types, Shallow Well Pumps, Deep Well Pumps
- Pumping Mechanisms: Piston Pumps, Centrifugal Pumps, Turbine Pumps
- When a Centrifugal Pump Fails to Operate
5 System maintenance
- Maintenance of Watering Systems: System Maintenance
- Maintenance Procedures and Scheduling: Periodic Inspections, Routine Upkeep, Contingency Work, Scheduling Work
- Maintaining Trickle Irrigation Systems: Cleaning Filters, Flushing the System, Use of Chlorine, Chlorination in Doses, Continuous Chlorination
- Maintaining Water Quality
- How to Improve the Quality of Water From Any Source
- Problems of Water Quality and Their Remedies - Physical Impurities: Sediment, Turbidity, Colour
- Problems of Water Quality and Their Remedies - Chemical Impurities: Hardness, Alkalinity, Corrosion, Iron, Salinity, Tastes and Odours
- Problems of Water Quality and Their Remedies - Biological Impurities: Algae, Micro organisms
- Problems of Water Quality and Their Remedies - Bacteriological Impurities
- Advantages of Fertigation
- Disadvantages of Fertigation
- Fertigation Types: Proportional Application, Quantitative Application, Continuous Application, Three Stage Application
- Fertiliser Injectors: Pump Injectors, Pressure Differential Injectors, Suction Injectors, Fertiliser Applications
- Plant Nursery Fertiliser Injection Techniques
7 Design evaluation
- Design Considerations: Water availability, Source and quality of water, Regulations, Site details, Finances and labour requirements
- Importance of Design
- Surface/Flood Irrigation: Border Check System, Hillside Flooding, Furrow Irrigation
- Sprinkler Irrigation: Wind Velocity and Wetting Pattern, Droplet Size, Rotational Speed, Evaporation
- Trickle Irrigation: Evaporation, Saves Labour, Does Not Get Water Where It's Not Wanted, Reduces Weeds, Reduces Disease
- Microjet Irrigation
- Do it Yourself Micro Irrigation Systems
- Time Length of Watering
- Automatic Systems
- Water Management in Turf
8 System design
- Pre-Planning Information: What is the soil like? dimensions and other measurements, Relevant by laws, Environment of the locality, Available resources, Client/owner preferencies and priorities, photos of site
- Type of System
- Underground Pipes
- Contact your regional or local water authority. Ask them for information on their water restriction policy. When are water restrictions enforced and how do they affect water users? Focus mainly on the problems experienced by agricultural users. Consider ways that users can minimise their dependence on water access? Write a brief report on your findings and submit with your assignment.
- Visit a property that uses irrigation. Discuss with the manager the methods that are used to decide when to water and how much water to use. Is irrigation an important element in the success or otherwise of the property?
- Choose a drainage system to which you can get access. Remember a drainage system is designed to cope with most situations. They are many examples in your local everyday environment. Some examples might include the guttering on your house or even on your car. Discuss how the system operates and include sketches to show design features.
- Contact a number of companies that offer computerised and technology solutions to irrigation. Obtain prices and information if possible on appropriate working installations of their product. If possible try a follow up visit at least one (1) operation and discuss the product with a user as well as a retailer. If distance or transport is a problem then you could try writing for this information, which would be suitable for the purpose of this set task.
- Visit a property that uses large irrigation systems. Enquire about the maintenance of their systems. Consider how is water quality monitored and maintained?
- Investigate at least two irrigation supply companies.
- Observe how they service customers. Consider: are there any other services they provide?
Excerpt From The Course
WATER VOLUMES AND DURATION
The exact procedure to determine the optimum flow rate and number of control stations for any irrigation system is impractical to define.
A general procedure to be followed is:
1) Divide the area to be irrigated into sections having similar water requirements according to plant and soil types and degree of enclosure and shading.
2) Select and design the sprinkler or other irrigation water distribution systems for all sections of the area to be irrigated, selecting tentative water application rates in ranges suitable for each section.
3) Further divide the sections decided upon in step 1 into smaller areas where necessary each requiring approximately the same water flow rate.
4) Calculate the peak daily irrigation water requirements for all sections of the irrigation area from peak monthly evaporation figures or other data where applicable.
5) Calculate the time required to apply the peak daily irrigation water requirements of each section calculated in step 4 using the tentative water application rates selected in step 2.
6) Calculate the total time required to apply the peak daily irrigation water requirements to all the sections selected in step 3.
7) Revise and refine the calculations and tentative decisions made in steps 2, 3, 5, 6 dependent on how the total daily irrigation time calculated in step 6 compares to the time available to carry out the irrigation each day.
Note: when designating your irrigation zones, bear in mind that mature plants require less water than young or establishing plants.
Also, consider that in terms of water usage efficiency, unless there are rain or other sensors built in to the system, a good system is only as good as the programmes which are set in the controller. If you do not set up your watering zones and times accurately, you may end up using more water than watering by hand.
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Horticulture Irrigation Management 100 Hours Certificate Course
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