Study On The Suitability Evaluation Of Land Resources Utilization In Low Hill And Gentle Slope Of Huanxian County

China has a large population,and the scarcity of land resources restricts the rapid development of China's social economy.The rational use of low hill and gentle slope land resources can effectively solve the development of agriculture,industry,tourism and other industries.The land area of low hill gentle slope in Huanxian County accounts for more than 60%of the county's area.Therefore,the research on the suitability evaluation of the development and utilization of the low hill gentle slope land in Huanxian county is of great significance to the rational utilization of land in Huanxian county.Huanxian county is located in the northwest of Qingyang City,Gansu province.The land resources are wide and the population is scarce.The area of the area is 9236square kilometers.It covers an area of about thirty percent of the total area of Qingyang.The main terrain is hilly and gully of the Loess Plateau.This content will take Huanxian county land resources as the research object,combined with the characteristics of the low hill gentle slope land resources in Huanxian County,and on the basis of the theory and method of land resource utilization and land suitability evaluation at home and abroad,based on the ArcGis analysis software,through the research area digital elevation model(DEM)and slope superposition.Combined with the present situation of land use in Huanxian County,this paper draws a map of low hill gentle slope land distribution in Huanxian county.In this paper,multi factor comprehensive evaluation method and Delphi method are used to evaluate the suitability of low hill gentle slope land in Huanxian County,and the contents and results are as follows:(1)The present situation and distribution characteristics of gentle slope land in Huanxian county were statistically analyzed.The total area of low hill gentle slope land in Huanxian county is relatively large,with a total area of 565792.64hm~2,accounting for 61.41%of the total land area of Huanxian County,of which the land resource area of 6 to 15 degrees reaches 318059.90hm~2,accounting for 56.21%of the low hill gentle slope land in Huanxian County,and the land resource area of 15degrees to 25 degrees is 247732.74hm~2,it accounts for 43.79%of the land area of low hill gentle slope in Huanxian county.(2)The suitability of suitable agricultural land for low hilly land in Huan county was evaluated and analyzed.The suitability of land suitable for agriculture in hilly slopes of Huanxian county can be divided into four types:unsuitable,critical,suitable and suitable.Through the analysis and study of the land resources in the ring County,from the point of view of suitable agriculture,the suitable agricultural land area is 80196.07hm~2,the suitable agricultural land area is 144686.95hm~2,the critical suitable agricultural land area is 193760.81hm~2,and the agricultural land area is not suitable for 147148.81hm~2;in general,the total amount of the low hill gentle slope of the county is compared.Relatively abundant,the distribution is relatively concentrated,the number of reserve land resources is large,and the comprehensive utilization space is large.(3)In the rational planning and utilization of low hilly land,suggestions for reducing the impact of ecological environment are put forward.Through the analysis and study of the distribution,quantity and suitability of the low hill gentle slope land in the ring County,the characteristics of the present situation of the land resources in the study area are summarized,and the proposed measures to reduce the i mpact of the ecological environment are proposed.