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FOREST RESOURCES WANAGEMENT ›› 2023›› Issue (1): 161-172.doi: 10.13466/j.cnki.lyzygl.2023.01.019

• Technical Application • Previous Articles     Next Articles

Exploring the Landscape Diversity of Graded Road Green Spaces Based on UAV Aerial Survey

XU Ganjun1(), WANG Yaping2, LI Xinyang2, GUO Nan2, YANG Mei2, HE Dan2()   

  1. 1. Northwest Research and Planning Institute of National Forestry and Grassland Administration,Xi'an 710048,China
    2. College of Landscape Architecture and Art,Henan Agricultural University,Zhengzhou 450002,China
  • Received:2022-12-08 Revised:2023-02-09 Online:2023-02-28 Published:2023-05-05

Abstract:

The road green spaces before and after the landscape optimization of national roads,county roads and township roads in Liquan County in 2021 were taken as the research objects.UAV aerial survey,field survey and GIS were used to obtain road green space information,and the DOM,DEM and DSM files generated from UAV aerial survey were combined to extract landscape features,propose transformation patterns and carry out landscape optimization.The species diversity of the optimized road green spaces was sampled and analyzed,and the diversity characteristics were analyzed by calculating the Margalef richness index,Shannon-Wiener diversity index,Simpson dominance index and Pielou evenness index,and recommendations were made for the development of road green space systems in Liquan County.The results of the study show that:1) UAV aerial surveys are suitable for collecting information on road green spaces with different landscape characteristics,and are universal in terms of data collection.Road green spaces are affected by road class and width,and show obvious differences in landscape configuration.The best landscape base of national roads and the worst landscape base of rural roads are found in Liquan County.There are shortcomings such as single plant species,lack of regional characteristics,poor community structure,low ecological benefits,etc.;2) Based on the characteristics of the site,it is proposed to improve the type and transformation of landscape transformation mode.The improvement is divided into two types,namely local modification and overall enrichment.Local modification is based on the design point of "breaking grey and increasing green,landscape articulation";overall enrichment is based on the design point of "adding layers,colors and numbers";the transformation type is based on "background trees+ornamental shrubs+ground cover ";3) The diversity of species on each grade of road is enhanced after landscape optimization,and the overall landscape effect is remarkable,which has certain significance for the construction of forest cities.

Key words: UAV aerial survey, road green space, plant landscape optimization, species diversity, rank characteristics

CLC Number: