Study On The Natural Regionalization Of Third-grade Highway In Hebei Province

Highway is an artificial structure laid out and exposed to the natural environment.Its planning,design,construction and operation are closely related to the natural environment factors.According to the China Highway Natural Zoning Standard,China is divided into 7 first-level regions and 52 second-level regions,among which Hebei province occupies 3 first-level regions and 6 second-level regions.The results of the division are not specific and detailed enough based on the comprehensive consideration of the distribution of natural environment in the whole country.In addition,the research results are limited by the time of the equipment instrument not enough data is accurate and complete,and the time interval for 40 years,highway career and corresponding changes have taken place in the natural geographical conditions,Based on the above reasons,it is urgent to use more accurate basic data and a new theoretical system method to study the regionalization of interprovincial highways.The article use ArcGIS software technology for data storage,analysis and picture compilation,so as to more accurately quantify the characteristics of geographical factors in the zoning and more clearly see the influence depth of the natural geographical environment on the highway.Based on the collection and analysis of the physical geographical environment data in Hebei,the practical experience of highway engineering in Hebei,and the regionalization achievements of other regions for reference,this paper divides the secondary natural regionalization into tertiary districts following the signs of hydrothermal,geomorphology and geography,etc.According to the original meteorological data in Hebei,the ArcGIS technology platform was used to interpolate and analyze the preprocessed data more accurately,and the prediction distribution maps of annual average temperature,July average temperature,annual rainfall,humidity coefficient and extreme maximum temperature,etc.were obtained,namely the basic maps.According to the corresponding zoning principles and methods,temperature was selected as the first-level zoning index and humidity as the second-level zoning index,and the climate zoning map of Hebei was drawn by overlaying the basic maps on ArcGIS software.According to DEM elevation data,ArcGIS software is used to analyze and calculate the slope and cutting depth,and reclassify the elevation,slope and cutting depth according to the zoning classification index to get the slope distribution map,elevation distribution map and the basic map of cutting depth distribution map.According to the corresponding zoning principles and methods,geotectonics was selected as the primary zoning index,slope and elevation as the secondary zoning index,and the Hebei geomorphological zoning map was drawn by using ArcGIS technology on the basic map by overlaying and combining.According to the research results of climate and geomorphic regionalization,the third-level regionalization of Hebei Province was completed on the basis of the second-level regionalization.This essay is of positive significance to the highway engineering construction in Hebei Province,and can also be used as a reference for the study of the natural regionalization of highways in other regions.