When water is supplied for actual irrigation in the field, charges are levied for the water so supplied which comes under the category of water rates. The main source of return on investment in irrigation projects lies in realisation of water rates from the beneficiaries. Water rates may be charged in one of the following ways: (i) Volume System: This [...]
In this article we will discuss about the environmental impact that results from faulty management of irrigation water. The environmental impacts are: 1. Rise in Water Table 2. Water-Logging 3. Soil Salinisation 4. Lowering of Water Table. Environmental Impact # 1. Rise in Water Table: In many canal command areas, faulty irrigation water management practices have resulted in rising of [...]
The following points highlight the three main types of structures used for controlling the flow of irrigation water in canals. They are: 1. Erosion Control Structures 2. Distribution Control Structures 3. Crossing Structures. Type # 1. Erosion Control Structures (Drop Structures and Chutes): Drop structures or chutes (Figs 10.9 and 10.10) are required to reduce the bottom slope of canals [...]