Journal of the Korean Society of Environmental Restoration Technology (한국환경복원기술학회지)

The Korea Society of Environmental Restoration Technology (한국환경복원기술학회)
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A Study of Evaluating Streetscape Green Environments to Improve Urban Street Green Spaces - A Case Study of Jeonju City -

도시가로녹지의 개선을 위한 녹화환경평가 연구 -전주시를 대상으로-

  • Jeong, Moon-Sun (Dept. of Environmental Landscape Architecture, Cheongju University) ;
  • Lim, Hyun-Jeong (Dept. of Landscape Architecture, Jeonbuk National University)
  • Received : 2019.04.15
  • Accepted : 2019.05.13
  • Published : 2019.06.30
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Abstract

The purpose of this study is to propose an evaluation method to assess green environments of streetscapes to improve urban street green spaces in Jeonju City. Through a rapid assessment of urban street green spaces, we suggest an objective basis for expanding street green space as well as for adopting sustainable maintenance and improvement measures. We choose 12 sections of streetscapes (roads and sidewalks) to investigate existing street conditions which have more than four lanes and function as major road axes. Six large roads and six medium roads of Jeonju City center area are investigated as pilot assessment study sites. Site inventory checklists consist of environmental characteristics of streetscape, street tree status, and planting condition evaluation. Environmental characteristics of streetscapes are composed of physical and neighborhood factors. For instance, items for physical factors are types and width of road/sidewalks, paving materials, tree protection materials, and green strip. And surrounding landuse is a neighborhood factor. Assessment items for street tree status are street plant names (tree/shrubs/ground cover), size, and planting intervals. Planting condition evaluation items are tree shape, damage, canopy density, and planting types with existence of adjacent green space. Evaluation results are classified into three levels such as A(maintain or repair), B(greening enhancement), and C(structural improvement). In case of grade A, streetscapes have enough sidewalk width for maintaining green strip and a multi-layered planting(in large road only) with fairly good growing conditions of street trees. For grade B and C, streetscapes have a moderate level of sidewalk width with a single street tree planting. In addition, street tree growing conditions are appeared poor so that green enhancement or maintenance measures are needed. For median, only grade B and C are found as its planting growing foundations are very limited in space. As a result, acquiring enough sidewalk space is essential to enhance ecological quality of urban street green. Especially, it is necessary to have green strip with reasonable widths for plant growing conditions in sidewalks. In addition, we need to consider native species with multi-layer plant compositions while designing street green.

Keywords

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Figure 1. Study site

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Figure 2. Streetscape section view

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Figure 3. Planting condition evaluation results for large roads

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Figure 4. Planting condition evaluation results for medium roads

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Figure 5. Planting condition evaluation results for median

Table 1. Street green inventory checklist comparison

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Table 2. Street green inventory checklist

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Table 3. Environmental characteristics of street green

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Table 4. Street tree status and planting types in large roads

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Table 5. Street tree status and planting types in medium roads

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Table 6. Evaluation of planting conditions

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Table 7. Proposed improvement guidelines for each road

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