Study on Irrigation Pattern in Irrigation Area of Semi-arid Region

Abstract

This paper takes 75% precipitation guarantee rate of Taoer River irrigation area in semi-arid area as an example, establishes the economic loss accounting model of irrigation area, studies the predicament of water resources allocation in irrigation area and the economic profit and loss under different irrigation modes in irrigation area. This paper discusses irrigation mode and transition development path. The study shows that in the dry year of 75% precipitation guarantee rate, adjusting the irrigation area diversion plan to make the region III into full surface water irrigation can reduce the loss of 26.23 million yuan. Although the region I and region II groundwater single irrigation than mixed irrigation model loss of 23.33 million yuan, but the development of paddy field to dry field soybean and water-saving total income can increase 1.99128 million yuan. Therefore, under the background of climate change, adjusting the water diversion plan of irrigation area and changing groundwater to dry field will be the transformation and development direction of irrigation area in semi-arid area.