Path analysis of water use efficiency in water diversion and irrigation areas in the lower Yellow River

Abstract

The evaluation of water use efficiency is a comprehensive and continuous evaluation of irrigation water use efficiency in an irrigation district. The relationship between the main impact factors can effectively improve the accuracy and rationality of the results. Based on the data from 2005 to 2014 in the Yellow River irrigation area of the lower reaches of the Yellow River, this paper determined the direct effect, indirect effect, determination coefficient of the eight quantitative impact factors, as well as the difference of total contribution to R2, through the mathematical method of path analysis. Through the calculation data and analysis, it is found that the completion rate of supporting facilities is the most important influencing factor for the water use efficiency of the water diversion and irrigation areas in the lower Yellow River. The completion rate of supporting facilities also plays a role in the investment of water-saving projects, channel length and channel lining rate, which plays a significant role of water diversion and irrigation areas in the lower Yellow River. and the least influential factor is precipitation. The above studies have identified the existing problems and weak links in the process of water resources management in the Yellow River Diversion Irrigation Area, providing technical support for the scientific planning and sustainable development of the Yellow River Diversion Irrigation Area in the next step.