Irrigation plans can be broadly classified into two main categories: the systemic irrigation plan, which involves broader plans designed for a large area using a single water source to plan an entire irrigation zone, and the rotational irrigation plan, which focuses on more precise irrigation planning within a single rotational unit.
Explanation:
1. In an irrigation zone, various water sources are used to plan the irrigation system.
Common irrigation water sources include:
- Reservoirs: Such as Shihmen Reservoir, Zengwen Reservoir, etc.
- Lakes: Such as Chengcing Lake, Qingcao Lake, etc.
- Rivers: Such as Zhuoshui River (main line), Pinan Main Canal, etc.
- Canals: Such as Taoyuan Main Canal, Shihmen Main Canal, Babao Main Canal, etc.
- Groundwater and Pumping Stations.
- Return Flow: Utilizing drainage water.
2. Irrigation Planning Procedure
The rotational water distribution plan is formulated after conducting the following survey operations:
- Area
- Crop Types and Planting Periods
- Soil Types
- Crop Water Requirements
- Hydrology and Water Sources
- Distribution Water Loss
- Calculation of Water Usage
- Scheduling of Water Distribution