環境共生
Online ISSN : 2434-902X
Print ISSN : 1346-3489
36 巻 , 1 号
選択された号の論文の15件中1~15を表示しています
巻頭言
原著論文(超領域)審査付
原著論文(一般)審査付
  • 鈴木 絢人, 伊東 英幸, 藤井 敬宏
    2020 年 36 巻 1 号 p. 12-20
    発行日: 2020/03/31
    公開日: 2020/05/01
    ジャーナル フリー

    In Hokkaido, Japan around 2,000 Deer-Vehicle Collisions (DVCs) occur every year, which is a serious problem from the point of view of traffic safety and ecosystem protection. Thus, it needs to consider countermeasures to avoid and/or decrease DVCs. However, there are few current researches to analyze the factors to causes DVCs for taking regional characteristics of multiple national routes especially occurring frequent collisions in Hokkaido into account. Therefore, in this research, the factors to cause DVCs was analyzed by applying negative binomial regression analysis to national route 44, 36, and 240 occurring frequent DVCs utilizing the latest DVCs data, roadside environmental data, and SPUE. As a result, it was concluded that the occurrence factors of DVCs are differs on regional characteristics of respective national route and also depend on roadside environment such as road structure and land use.

  • 渋澤 博幸, 松島 大智
    原稿種別: 研究論文
    2020 年 36 巻 1 号 p. 21-31
    発行日: 2020/03/31
    公開日: 2020/05/01
    ジャーナル フリー

    This study aims to investigate how the production activities in 35 municipalities of Shizuoka Prefecture recover when these activities stop due to a tsunami and nuclear power plant accident caused by Nankai megathrust earthquakes. As a disaster area, we focus the flooded zones in the hazard map published by Ministry of Land, Infrastructure, Transport and Tourism. Furthermore, we assume three damage scenarios and different recovery speeds in each production sector. The dynamic recovery processes are simulated by using an inter-regional input-output model with 35 municipalities of Shizuoka Prefecture. We show the recovery processes in the municipalities and analyze the resilience of the regional economy.

  • 津波リスクを有する地方圏を対象として
    奥嶋 政嗣 , 山中 英生, 渡辺 公次郎
    原稿種別: 研究論文
    2020 年 36 巻 1 号 p. 32-43
    発行日: 2020/03/31
    公開日: 2020/05/01
    ジャーナル フリー

    Residence preferences are probably affected by tsunami risk. How much does heterogeneity influence the residence preferences in local areas that are at risk of tsunamis? The present residential environment and stated residence preferences were therefore investigated using an online questionnaire survey. Residents planning to move in local areas with tsunami risk were targeted for the survey. A binary logit model was fitted to this residence preference model using a database obtained using the questionnaire survey. As a result, the impact of the maximum inundation depth following tsunami is clearly greater in households that intend to live in detached houses. Mutual assistance and recognition of future potential was found to increase the willingness to continue living in the current area.

  • 積田 典泰 , 菊池 浩紀 , 福田 敦
    原稿種別: 研究論文
    2020 年 36 巻 1 号 p. 44-52
    発行日: 2020/03/31
    公開日: 2020/05/01
    ジャーナル フリー

    In recent years, urban activities are deeply affected by flooding are occurred frequently, and increased flood damages in developing countries. Although direct damages of urban flood like the inundation for housing have been analyzed, indirect damage such as the influence on the urban activity by loss of the connectivity of the transport network has not been sufficiently analyzed. Therefore, the objective of this study is to reveal the impacts of implementation of policy for the road network disruptions. Firstly, each road section compared to the traffic volume of each link for understanding the priority of the rank of implementation in countermeasures. And then, the policy of the transport sector in mitigating urban floods impacts was evaluated. Consequently, the study found that the policy of raising arterial roads could shorten average travel time by 20 minutes during flooding in the zones along the river. This benefit is valued at about 227 million THB for 20 years. Finally, this study suggests that it is essential to select appropriate policy on the transport sector for mitigating urban flood impacts, focusing on the vulnerability of transport networks.

  • 川口 暢子 , 林 希一郎 , 藤井 実
    原稿種別: 研究論文
    2020 年 36 巻 1 号 p. 53-64
    発行日: 2020/03/31
    公開日: 2020/05/01
    ジャーナル フリー

    The urban public forest management needs much energy input from field management to the disposition or recycling of waste. For desirable urban forest management, considering the efficiency that CO2 emissions caused by using the machine or transportation, the mineral resources of the machine, labor input for forest maintenance and occupied land use for resources are needed. This study focus on the assessment of the urban public forest management using the Resources Time Footprint (RTF). RTF is defined as the resource occupancy to capacity ratio, that uses the multidimensional aspects related to sustainability. In this study, RTF was estimated for the urban forest management wastes like the pruned branches as following indicators; 1) iron resources of the material of machine for maintenance of urban forest, 2) environmental capacity of CO2 emissions derived by energy consumption, 3) work times for labor input as human resources and 4) occupied land use for resources. The several scenarios set based on the recycling way and intensity of management were assessed in 100 years. The result provides that the amount of RTF value of the current recycling system for paper manufacture plants is higher than the case of a recycling system for power plants. This result indicates that an increase of RTF when to continue the present recycle method and intensify the volume of forest maintenance. These results indicate that to recycle the Urban forest management wastes, the recycling system of the pruned branches for paper manufacture plants is desirable that the way of a recycling system for power plants.

  • 寺西 たから
    2020 年 36 巻 1 号 p. 65-74
    発行日: 2020/03/31
    公開日: 2020/05/01
    ジャーナル フリー

    The political cooperative framework has been weakened towards climate change, although it is borderless problem. Under such circumstances, this paper focused on the possibility of private companies that might be a driving force for emission reduction if any incentive mechanism is set. This paper analyzed the Clean Development Mechanism (CDM) at the second commitment period under the Kyoto Protocol by interviews of private companies and document researches. As a result, it showed some academic arguments are not in line with real business, and still specific companies continue CDM credit issuance even its cost is high and the future of CDM is an uncertain and unpredictable system.

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