IRR200 Principles of Irrigation (8)

This subject provides an introduction to soil-water-plant-atmosphere relationship and soil moisture measurement techniques for irrigation scheduling. A study of open channel and pipe hydraulics and its application to study the principles of gravity, drip, and sprinkler irrigation. Recycled water and wastewater use for irrigation.


* Offering has a residential school. Please view following information for further details.

Session 2 (60)
Online *
Wagga Wagga Campus

Continuing students should consult the SAL for current offering details: IRR200. Where differences exist between the Handbook and the SAL, the SAL should be taken as containing the correct subject offering details.

Subject Information

Grading System



One session


School of Agricultural and Wine Sciences

Enrolment Restrictions

Students in Post Graduate degrees cannot enrol in this subject, they should enrol into IRR400 which is the post graduate equivalent.

Incompatible Subjects


Learning Outcomes

Upon successful completion of this subject, students should:
  • be able to compute plant available soil water and interpret soil-water relations
  • be able to calculate water requirement of horticultural and broad acre crops
  • be able to apply basic hydraulic principles to determine pressure requirement and head loss in pipe and open channel flow systems
  • be able to explain the efficiency of a surface irrigation event and evaluate distribution uniformity of drip and sprinkler irrigation systems
  • be able to design a small scale pressurised irrigation system: choose appropriate dripper, sprinkler, and pump products
  • be able to assess irrigation water quality in terms of physical and chemical properties and determine the leaching requirements


This subject will cover the following topics:

Irrigation: World and Australian Context
Irrigation and global food security, irrigation in the Australian context, irrigation productivity and irrigation sustainability;

Soil-Plant-Water-Atmosphere Relations
Soil-plant-water relations, soil moisture measurement, crop water requirement, irrigation water requirement and irrigation scheduling;

Open Channel and Pipe Hydraulics
Open channel hydraulics, pipe line hydraulics and irrigation pumps

Irrigation Systems
Irrigation system layout, surface (gravity) irrigation methods, surface irrigation performance, sprinkle irrigation, microirrigation, waste and recycled water use;

Environmental impacts of irrigation

Indicative Assessment

The following table summarises the assessment tasks for the online offering of IRR200 in Session 2 2020. Please note this is a guide only. Assessment tasks are regularly updated and can also differ to suit the mode of study (online or on campus).

Item Number
Value %
Soil-plant-water relations
Crop water requirement and irrigation scheduling
Residential school report
Irrigation methods
Final exam

Residential School

This subject contains a 3 day Compulsory Residential School.

The residential school provides hands on approaches to the theory taught.
There are lectures, tutorials, laboratory practicals and field trips to Irrigation areas.

The information contained in the CSU Handbook was accurate at the date of publication: May 2021. The University reserves the right to vary the information at any time without notice.