What kind of water is used in agricultural production in Ya 'an, and what irrigation methods are mainly used in Ya 'an? What types of water conservancy projects have been built in Ya 'an and what are

What kind of water is used in agricultural production in Ya 'an, and what irrigation methods are mainly used in Ya 'an? What types of water conservancy projects have been built in Ya 'an and what are their functions? There are the following kinds of water for agricultural production: (1) surface water; (2) Groundwater; (3) sewage reuse; (4) Natural water (rain and flood). Agricultural irrigation methods can generally be divided into traditional surface irrigation, ordinary sprinkler irrigation and micro irrigation.

Surface irrigation is an ancient and most common irrigation method. After irrigation water is introduced into farmland, it will penetrate into the soil under the action of gravity and capillary. Field engineering facilities are simple, energy-free and easy to implement, and are still widely used in countries all over the world. The disadvantage is that the surface soil is easy to harden, the water use efficiency is low and the irrigation uniformity is high.

The key water conservancy projects in Ya 'an have been realized from scratch and from small to large. Water conservancy projects for people's livelihood spread all over urban and rural areas, laying a solid foundation for living and working in peace and contentment, increasing income and enriching the people; The effectiveness of water resources management has been continuously improved, and the ecological Ya 'an is well deserved.