Evaluation And Temporal And Spatial Evolution Of Farmland Water Conservancy Modernization Level In Henan Province

Henan is an important core area of grain production in China.Improving the modernization level of irrigation and water conservancy in Henan is of great significance to ensure food security and national security.According to the five categories of irrigation and drainage,management technology,ecological environment,economic benefits and development support,this paper divides into 5 main indicators and 18 sub indicators,forming a comprehensive evaluation index system for the modernization level of irrigation and water conservancy in Henan Province.Through comparative analysis,the entropy weight model is used to evaluate the modernization level of irrigation and water conservancy in Henan Province and analyze the temporal and spatial evolution law by using the data from 2016 to2020.This research mainly includes the following aspects:(1)This paper studies the modernization level of irrigation and water conservancy in Henan Province,analyzes the connotation,current situation and development direction of irrigation and water conservancy modernization,points out a clear direction for the modernization of irrigation and water conservancy,and provides research ideas and methods for the study of irrigation and water conservancy modernization.(2)The evaluation index system of modernization of irrigation and water conservancy in Henan Province is constructed from the five aspects of irrigation and drainage,management technology,ecological environment,economic benefits and development support.Combined with the actual situation of the construction and development of irrigation and water conservancy in China,the evaluation of modernization of irrigation and water conservancy is divided into four development stages,and the corresponding evaluation index system is established.(3)Based on analytic hierarchy process(AHP)and entropy method,two mathematical models of modernization level evaluation are established.Taking Shangshui County as an example,the two models are applied to evaluate,so as to analyze and compare the applicability of the two evaluation models.(4)The entropy method is used to determine the weight of the index system to comprehensively evaluate the modernization level of irrigation and water conservancy in Henan Province.Then Arc GIS software is used to analyze the overall spatial autocorrelation of the modernization level of irrigation and water conservancy in Henan Province.Finally,geoda software is used to analyze the local spatial autocorrelation of the main indicators in the study area.The results show that: from the time series analysis,it can be seen that the comprehensive score of the modernization level of farmland and water conservancy in various cities has increased in the past five years.The scores of all main indicators are steadily increasing,except that the ecological environment indicators have declined in 2019.From the perspective of spatial pattern,at the present stage,only 8 cities such as Zhoukou,Zhumadian and Nanyang have reached the preliminary modernization stage,and the remaining 10 cities are still in the stage to be strengthened.The irrigation and drainage level is high in the South and low in the north.The level of ecological environment decreased from west to East.There are great spatial differences in the level of management technology.The regions with higher level are mainly distributed in the East and southwest of Henan,and the central region shows the spatial characteristics of mosaic intersection of high level and low level.The overall difference of economic benefit level is not large.The spatial characteristics of the development support level are similar to the management technology level.The modernization level of irrigation and water conservancy in Henan Province has a significant spatial positive correlation and small spatial heterogeneity.The "insignificant" type area is dominant(more than 50%),and the HH and ll type areas account for about 35%.In terms of landform,the modernization level of irrigation and water conservancy in plain areas is generally higher than that in hilly areas.