Multidisciplinary approach to design fit-for-purpose irrigation system that is with nature
The objective of this exercise is to produce a detailed design so that a fit-for-purpose irrigation scheme can be developed. Detailed surveys need to be completed, the most important of which is the topographical survey. Other surveys, such as hydrology and geology, are also important for identifying suitable design and construction solutions. Since the irrigation system is ultimately intended for commercial farm production, both biological factors (e.g., plant water requirements) and operational factors (e.g., the proportion of the area to be irrigated per day to fit the production schedule) must be considered in the detailed design.
Once the detailed design is completed, work volumes—e.g., kilometers of canals, roads, and bunds; cubic meters of earthmoving; number of gates and concrete structures—can be reliably estimated. Detailed estimates for machinery, tools, building materials, and labor can then be prepared to match the required development timeframe.
A development implementation plan will include a timetable for the deployment of machinery, personnel, and materials to achieve the development targets. Issues such as contractor bidding and selection will also be considered.
The operation and maintenance plan refers to the operating manual once the development is completed and the irrigation system is put into use.
Note that the design also includes supporting infrastructure such as access roads, internal road networks, office facilities, and accommodation.