
Explore soil water relationships and the physical properties governing water entry, movement, and availability to crop roots. Learn about soil profile layers, texture, porosity, bulk density, and hydraulic conductivity.
Explore water depth in the root zone for surface irrigation, including root zone depth, field capacity, wilting point, available water, and how to compute irrigation depth with efficiency.
Explore surface irrigation advantages, methods (basin, border, furrow), and the four process phases—advance, storage, depletion, and recession—along with design and operational considerations.
Classify surface irrigation networks, explore land reclamation considerations, and review canal and drain types, data needs, climate design factors, and reasons to avoid direct irrigation.
Explore the alignment of surface irrigation networks, placing main canals at the highest level and main drains at the lowest, with curves and a minimum 1000 ft area served.
Construct synoptic diagrams for canals and drains by plotting water levels relative to ground level, applying appropriate scales, slopes, and offsets for main, branch, and distributary lines.
Perform aerial surveys of distribution and main canals to calculate the area served for each section using equal-area methods, downstream and upstream relations, and scaling factors.
Explore practical calculations for designing surface irrigation networks, including determining irrigation depth and frequency across crop growth stages, accounting for evapotranspiration, field capacity, wilting point, and system efficiency.
Explore irrigation efficiencies in surface networks, including conveyance, application, water use, storage, distribution, and consumptive use, plus canal losses and overall project efficiency.
Learn design principles for surface irrigation networks, including radius of curvature, discharge, velocity, soil characteristics, and canal dimensions. Apply head loss and relative distribution methods to sizing irrigation outlets.
Lecture 17 illustrates solving planning and design of surface irrigation networks, using Manning’s equation for trapezoidal canals to derive y and b and assess seepage and velocity.
Explore the planning and design of surface irrigation regulators, covering discharge regulation, water slope and velocity control, diversion, and hydraulic design, with emphasis on location, materials, and regulator elements.
Explore the telescope structure at the end of a waterway for automatic and controlled evacuation via weir, orifice, and pipe discharges, with design formulas and an example.
This course is best suitable for the students who find “surface irrigation engineering" subject as difficult, because all the complex problems are discussed in simple manner. This course is structured into five sections with 22 lectures, each covering a specific topic related to surface irrigation network.
The sections are as follows:
Section 1: Introduction
In this section, you will identify the main objectives and the structure of “Planning and Design of Surface Irrigation Networks” course. Learn about irrigation definition, necessity, methods of irrigation and how to select an irrigation method. Learn about soil – water relationship and soil moisture content. Learn about how to determine the water depth retained in root zone and how to determine the irrigation interval.
Section 2: Surface Irrigation Networks
In this section, You will learn about surface irrigation process and the principal data needed for surface irrigation design. Learn about how to classify surface canals and drains. Learn about how to make a suitable alignment of canals and drains nets, how to construct the synoptic for canals and drains and how to calculate the area served for different canal types.
Section 3: Water Requirements for Crops
In this section, you will learn about surface irrigation rotations and crop pattern. Learn about how to calculate practical and theoretical water duty. Learn about how to calculate the different surface irrigation efficiency types.
Section 4: Design of Surface Canals and Drains
In this section, you will learn about how to calculate canals and drains discharge and how to design surface canals and drains cross section by using Manning Equation. Learn about how to design irrigation outlet. You will Identify the berm and bank width. You will learn about how to draw cross section of surface canal or drain, how to check the seepage line and how to draw the longitudinal sections of main canals and main drains.
Section 5: Design of Main Water Structures in Irrigation Project
In this section, you will learn about the definition and classification of the regulator, how to design the different elements of the regulator and how to check the stability of the pier for the regulator. You will also Identify the tail escape structure and learn about how to design the different elements of the tail escape. All sections are covered with solved examples.
By the end of this course:
You will have a solid understanding of the theory and practice of surface irrigation engineering and you will be able to apply your knowledge and skills to solve real-world problems related to surface irrigation.