Public Works Research Institute Data

FY2000
FY1999
FY1998
FY1997
FY1996
FY1995
FY1994
FY1993
FY1992
FY1991
FY1990
FY1989
FY1988
FY1987
FY1986
FY1985
FY1984
FY1983
FY1982
FY1981

The contents of the items marked with an icon are available as a pdf file.

FY2000

Environmental Conservation Technology in Construction Projects - Mitigation Case Studies

Date of Issue:2001.3
Author:Environment Department

Mitigation is an English word meaning “mitigation,” but recently it has come to mean “various measures to mitigate the impact of human activities, such as construction projects, on the natural environment,” and mitigation associated with public works projects is widely used in Japan. This document outlines the social background and technology of mitigation, and introduces examples of its implementation in Japan for various projects such as roads, rivers, and dams.

Civil Engineering Research Institute Information No. 3829

Report of the Greening Ecology Laboratory, Vol. 15

Date of Issue:2001.3
Author:Greening Ecology Lab.

This volume contains and edits summaries of surveys and research conducted by the Greening and Ecology Research Laboratory in fiscal 1999, as well as papers published by the laboratory members in academic societies and journals. The summaries of surveys and research are categorized into three themes: research on greening technology, research on parks and green space planning, and research on technology for conservation and creation of the natural environment. Papers presented at conferences and in journals were edited into four themes: papers, conference abstracts and symposium abstracts, feature articles, and PWRI publications.

Civil Engineering Research Institute Information No. 3826

Nichiran Workshop “Toward the Prevention of Habitat Fragmentation and the Formation of Ecological Networks by Roads

Date of Issue:2001.3
Author:Hirofumi Onishi, Atsushi Kawakami, Rumiko Imahori, Nobuo Fujiwara, Yoshiyuki Hioki, Yayoi Kaneko

This report is a part of the joint research project “Research on Measures to Prevent Habitat Fragmentation by Roads (in charge of Road Environment Laboratory)” and “Research on Ecosystem Network Planning (in charge of Greening and Ecology Laboratory)” conducted under the Japan-Dutch Science and Technology Agreement, and is a report of the Japan-Dutch Workshop “Toward the Prevention of Habitat Fragmentation by Roads and the Formation of Ecosystem Networks Prevention of Habitat Fragmentation by Roads and Formation of Ecosystem Networks”.

Civil Engineering Research Institute Information No. 3820

FY1999

Study on the production method of compost mixed with sewage sludge and pruned leaves and branches

Date of Issue:2000.3
Author:Nobuo Fujiwara, Takehiko Ishizaka, Atsuko Ishisonne, Koichi Morisaki, Yasuo Iizuka

The need to recycle sewage sludge and pruning branches and leaves, which were previously disposed of as waste, is now being questioned. However, sewage sludge is difficult to handle due to its odor and viscosity, and prunings and leaves are difficult to compost due to their high C/N ratio. Therefore, we studied a method to produce compost by mixing these materials.

Civil Engineering Research Institute Information No. 3708

Questionnaire Survey on Evacuation Behavior and Park Usage during the Great Hanshin-Awaji Earthquake

Date of Issue:2000.3
Author:Takashi Tanaka, Nobuo Fujiwara, Masahiko Matsue, Hiroshi Yamagishi, Jun Okada, Yoshiteru Nojima

In order to clarify how city parks were used by citizens as places for emergency evacuation and evacuation life during the Great Hanshin-Awaji Earthquake, we conducted a questionnaire survey on their behavior immediately after the earthquake, reasons for choosing evacuation sites, behavior between evacuation sites and their homes, use of cars during evacuation, and use of parks before and after the earthquake. The survey was conducted to understand the specific evacuation behavior of disaster victims and their use of evacuation facilities such as city parks.

Civil Engineering Research Institute Information No. 3706

The Road side Trees in Japan IV

Date of Issue:1999.9
Author:Nobuo Fujiwara, Takashi Tanaka, Naomi Kibe

This survey was conducted to determine the current status of road greening in Japan, including the rate of road greening, and the number and species of road greening trees.

Civil Engineering Research Institute Information No. 3666

Technical Documentation on Disaster Prevention Park Planning and Design - Guidelines for Planning and Design of Disaster Prevention Parks (Draft)

Date of Issue:1999.7
Author:Keishi Nitta, Hiroshi Matsumoto, Akihiro Shinomiya, Nobuo Fujiwara, Hiroshi Yamagishi

In order to promote the development of disaster prevention parks that can function as evacuation sites and recovery centers in the event of a major earthquake, specific planning and design methods for disaster prevention parks were compiled as “Draft Guidelines for Planning and Design of Disaster Prevention Parks” for use by park officials in government agencies.

Civil Engineering Research Institute Information No. 3663

FY1997

Current Status of Private Land Greening and Green Space Preservation Systems in Local Governments

Date of Issue:1997.4
Author:Takashi Tanaka, Chiaki Akiyama

We collected ordinances, networks, etc. for promoting greening and green space conservation on privately-owned lands maintained by local governments nationwide and organized their contents into case sheets, clarifying the chronological trends in greening and green space conservation that these systems aim to achieve and the relationship between the objectives of the systems and the methods used to achieve them. The report also clarified the chronological trends of greening and green space conservation that these systems aim to achieve, and the relationship between the objectives of the systems and the methods used to realize them.

Civil Engineering Research Institute Information No. 3520

FY1995

A Study of Floral Landscaping Methods in Public Spaces

Date of Issue:1996.1
Author:Mariko Handa, Takashi Tanaka, Yoshiyuki Hioki, Yasuo Iizuka, Takeshi Harimoto

This report summarizes the main points of floriculture landscaping in public spaces, including planning, design, construction, management, and materials, through a questionnaire survey and analysis of case studies.

Civil Engineering Research Institute Information No. 3416

Study on composting of sewage sludge and pruning branches and leaves

Date of Issue:1996.1
Author:Takashi Tanaka, Nobuo Fujiwara, Nobuyuki Momoi, Yasuo Iizuka, Mariko Handa, Tetsuzo Ozawa, Takehiko Ishizaka, Hiroyasu Yoshinaga

The project was to make a trial compost from sewage sludge and pruning residue, and conduct planting tests using the compost to understand the properties and fertilizer efficacy of the trial compost, and to summarize the method of making compost using these materials.

Civil Engineering Research Institute Information No. 3413

FY1994

Study on Slope Planting Methods using Trees

Date of Issue:1995.1
Author:Mariko Handa, Yasuo Iizuka, Hiroshi Maeda, Tsuneo Arimura, Kenichiro Fujisaki

The purpose of this study was to understand the current state of technology for introducing woody plants and to develop a method for introducing woody plants that combines the installation of saplings and the spraying of a thick layer of substrate (sapling installation and spraying method), in order to improve construction techniques that take the landscape aspect and stability of the slope revegetation work, which is done to prevent slope erosion and to harmonize it with the surrounding environment. The results are summarized below.

Civil Engineering Research Institute Information No. 3334

FY1993

Study on Functions of the Urban Forest

Date of Issue:1994.1
Author:Mariko Handa, Chiaki Akiyama, Masatoshi Tabata, Hiroshi Maeda, Takeshi Harimoto, Takayuki Sato

In order to examine the role that urban forests should play in future urban green space policies and the utilization of their functions, this report presents the concept of urban forests, conducts an immediate geographical analysis, organizes the water level of green cover and related legal systems and conditions for demonstrating their functions, compares and verifies evaluations by residents and academic experts, and makes recommendations regarding the functions and facilities of urban forests. The report also includes a comparison and verification of evaluations made by residents and knowledgeable experts.

Civil Engineering Research Institute Information No. 3253

Study on Basements for Halophilous Plants

Date of Issue:1994.1
Mariko Handa, Nobuo Fujiwara, Hiroyasu Yoshinaga, Hitoshi Nakajima, Takeshi HarimotoAuthor:半田真理子・Fujiwara Nobuo・吉永裕康・中島均・播本武史

With the aim of improving revegetation methods in subtropical coastal areas, we conducted a survey of the actual vegetation conditions in the rocky reef and beach areas of Okinawa, a survey of growth substrates, and tests of growth on artificial substrates, selected promising plants for revegetation, clarified their physiological and ecological characteristics, and examined the basic conditions for artificial growth substrates. The results are summarized in this report.

Civil Engineering Research Institute Information No. 3252

The Road side Trees in Japan 3

Date of Issue:1994.1
Author:Mariko Handa, Yasuo Iizuka, Kenichiro Fujisaki

The road greening ratio (greened road extension/road extension) was calculated using the basic table by general traffic volume surveyed in the National Road Survey (Road Traffic Census) conducted by the Road Bureau of the Ministry of Construction. In addition, a questionnaire survey was conducted on roads that had been shared as of March 31, 1992, to determine the number of trees, tree species, and tree types, and the results were compiled.

Civil Engineering Research Institute Information No. 3239

Study on Shade Tolerance of Greening Plants in Urban Spaces

Date of Issue:1994.1
Author:Mariko Handa, Nobuo Fujiwara, Hiroyasu Yoshinaga

We conducted shade tolerance tests on tree species considered to be shade trees among public greening trees and investigated the growth of greening trees in shady urban spaces, examining the suitability of greening trees for the growth environment conditions, particularly in terms of sunlight conditions, and compiled basic knowledge regarding planting design and construction in shady areas.

Civil Engineering Research Institute Information No. 3231

Study on the Application of Plaza's Characteristics to Planning and Design

Date of Issue:1993.9
Author:Mariko Handa, Chiaki Akiyama

The following points for the planning and design of squares are summarized based on the results of a questionnaire survey on the establishment and management of squares, a survey on the actual use of squares, and a survey on the characteristics of square-like behavior.

Civil Engineering Research Institute Information No. 3212

FY1992

The Study on Environments of Rearing for Trees on The Seashore

Date of Issue:1993.1
Author:Mariko Handa, Chiaki Akiyama, Hiroyasu Yoshinaga

We conducted a survey on the actual conditions of jogging paths in urban parks, etc., measured and analyzed the viscoelastic properties of jogging path pavement materials, and conducted experiments on landing impact.

Civil Engineering Research Institute Information No. 3160

Research on Techniques for creating and Maintaining Park Forests No.2 -Activity and Forest Configurations of Park Forests-

Date of Issue:1992.7
Author:Mariko Handa, Takeshi Harimoto, Hiroyasu Yoshinaga, Hiroshi Maeda, Kenji Koseki, Takayuki Sato, and Hiroshi Yamagishi

In addition to studying the suitability of forest models for different recreational activities, case studies were conducted on how to proceed with development and management planning, using a national park as a case study. In addition, technical methods for park forest management were also examined, and in particular, test plantings were conducted for thinning, and their effectiveness was analyzed and summarized.

Civil Engineering Research Institute Information No. 3126

A Study of Road Landscape Seen from the Outside

Date of Issue:1992.5
Author:Mariko Handa, Tetsuzo Ozawa

As part of the systematization of roadscape survey methods, we summarized survey methods related to the external landscape of roads and the meanings of terms related to the landscape.

Civil Engineering Research Institute Information No. 3115

FY1991

A Study on Fixing Carbon Dioxide Capacity with Photosynthesis of Roadside Trees

Date of Issue:1992.3
Author:Mariko Handa, Tetsuji Ozawa, Yasuo Iizuka, Tadayoshi Inoue, Hiroshi Maeda, Juntaka Tashiro, Tsuneo Arimura and Hiroshi Takeda

The report summarizes the carbon dioxide fixation function of roadside trees, using the fact that the amount of growth equals the amount of carbon dioxide fixation, and presents detailed national and basic data on roadside trees, including their species characteristics and a simple method for measuring carbon dioxide fixation.

Civil Engineering Research Institute Information No. 3059

Technique of planting Using Container-grown Trees for Public Spaces

Date of Issue:1991.11
Author:Mariko Handa, Yasuo Iizuka, Tadayoshi Inoue, Hiroshi Maeda, Renji Suenaga, Kenji Koseki and Takayuki Sato

After organizing the problems and issues surrounding the introduction of container-grown trees into public greening, and understanding the advantages of container-grown trees and points to keep in mind in their construction through testing, we prepared “Technical Guidelines for Planting and Construction of Container-grown Trees for Public Greening (Draft)” and “Quality and Size Standards (Draft),” and also developed and compiled the technology for growing and planting large trees using container-grown trees. In addition, we developed and compiled technologies for growing and planting large trees using container-grown trees.

Civil Engineering Research Institute Information No. 3037

FY1990

Utilization of Sludge for Garden Plants

Date of Issue:1991.3
Author:Mariko Handa, Tetsuzo Ozawa, Yasuo Iizuka, Hiroyasu Yoshinaga, Tadayoshi Inoue, Hiroshi Maeda, Juntaka Tashiro, Tsuneo Arimura

Various planting tests and a questionnaire survey of landscaping contractors were conducted on digestion and dehydration sludge and composting sludge, and explanations and new data were added to the “Guidelines for Application of Sewage Sludge in Urban Greening (Draft)” (March 1987, Urban Affairs Bureau, Ministry of Construction), including precautions for use from the user side, The construction procedures, etc., were also compiled.

Civil Engineering Research Institute Information No. 2938

FY1989

A Study on assessment of modification of road structure in areas of scenic beauty

Date of Issue:1990.1
Author:Mariko Handa, Hiroshi Yamagishi, Tadayoshi Inoue, Hiroshi Maeda, Tsuneo Arimura

In addition to identifying general trends in the distribution of scenic spots, the level of their value as scenic spots, and their landscape characteristics, we categorized the general scenic spots along the Tokyo Bay Ring Road and other large-scale special roads by compositional characteristics and summarized the landscape characteristics of each type of scenic spot.

Civil Engineering Research Institute Information No. 2816

FY1988

A Study on Techniques of Alfore-station in Parks (1)

Date of Issue:1989.3
Author:Hiroshi Maeda, Yutaka Takeda, Yutaka Yamagishi

The definition of park forests, the scope of park forests, and the procedures and methods of park forest planning were examined, as well as the techniques of creation and management. The use of a planning model for a priority red pine forest as a case study was also examined, and a specific application method was discussed and summarized.

Civil Engineering Research Institute Information No. 2733

A Research on the Plants Properties in the Cold District in Japan

Date of Issue:1989.3
Author:Hiroshi Maeda, Takayuki Sato

In order to obtain basic judgment materials for selecting suitable tree species for public greening in cold regions, we conducted a survey of planting results, damage countermeasures, etc., by interviewing greening administrators, and examined the results of planting results in urban areas and their regional distribution, growth conditions of planted trees, actual weather damage countermeasures for planted trees, and characteristics of trees in cold regions. The results are summarized below.

Civil Engineering Research Institute Information No. 2726

Survey and Analysis of Soil Dressing Method on Slope-Detail of Development, Spread, Growing Process of Vegetation-

Date of Issue:1989.3
Author:Hiroshi Maeda, Kenji Koseki and Yasuo Iizuka

We investigated the development and diffusion process of the thick substrate spraying method, which is now widely used not only on soft and hard rock, but also on sandy slopes with high soil hardness, and conducted field surveys on selected slopes that have been in place for a long time.

Civil Engineering Research Institute Information No. 2725

The Road side Trees in Japan 2

Date of Issue:1988.12
Author:Hiroshi Maeda, Tsuneo Arimura, Yasuo Iizuka

A survey was conducted on the number and species of tall, medium, and shrubby trees on roads in Japan that were in use as of March 31, 1987, and a comparison was made between the results of this survey and those of previous surveys conducted in the past (1967 and 1982) in 150 major cities in Japan (tall trees only). The results of this survey were compared with the results of past surveys conducted in 1967 and 1982 in 150 major cities in Japan (tall trees only).

Civil Engineering Research Institute Information No. 2693

Studies in Planting Technology with Super Absorbent Polymer

Date of Issue:1988.10
Author:Hiroshi Maeda, Tadayoshi Inoue, Tsuneo Arimura, Juntaka Tashiro, Yasuo Iizuka

This report summarizes the results of the “Research on the Use of Water Retention Agents in Road Greening, etc.” conducted by the Ministry of Construction in collaboration with the Japan Landscape Architecture and Landscape Association, and includes the results of a survey on the water retention effects of water retention agents such as soil conditioners, rehydration agents immediately after planting, and root system curing agents during transplanting, as well as the adverse effects of soil permeability and root failure. The results were summarized.

Civil Engineering Research Institute Information No. 2686

FY1987

User Analysis of the Large Scale Park -In Case of Musashi-Kyuryo National Government Park-

Date of Issue:1988.3
Author:Hiroshi Maeda, Kenji Koseki, Tadayoshi Inoue

Park user analysis was conducted in a large-scale park, and the following topics were analyzed based on the survey research: how to implement the user analysis method in a large-scale park, the actual use of the National Musashi Hills Forest Park, and suggestions for future large-scale park planning.

Civil Engineering Research Institute Information No. 2617

FY1986

Landscape Management Guideline for Subtropical plants of Seashore

Date of Issue:1987.2
Author:Tadayoshi Inoue, Kenji Koseki, Makoto Serizawa, Nobuo Fujiwara

The occurrence and recovery process of sea breeze damage to tropical and subtropical plants planted in the National Okinawa Memorial Park, which is located on a seaside and is susceptible to sea breeze damage caused by typhoons and winter monsoons, was surveyed. The results were compiled as a draft plant management guideline.

Civil Engineering Research Institute Information No. 2783

An Investigation on landscape planning for riverbed park

Date of Issue:1986.10
Author:Tadayoshi Inoue, Osamu Shinohara, Hiroshi Takeda, Noboru Ito

Focusing on the landscape formation in river parks, this report is a collection of reference materials for landscape design of river structures that make the most of the characteristics of river spaces, and proposes model types of design objects by taking up the morphological characteristics of river landforms and the location of vegetation, which remain relatively natural. The model type of the design object was proposed and summarized.

Civil Engineering Research Institute Information No. 2413

FY1985

Application standard of Sewage sludge for greening

Date of Issue:1986.3
Author:Tadayoshi Inoue, Juntaka Tashiro, Nobuo Fujiwara

This is a draft of technical guidelines for the application of sewage sludge (dewatered sludge, composted sludge, and dried sludge) in public greening, based on the results of research conducted from 1980 through 1984.

Civil Engineering Research Institute Information No. 2341

The Road side Trees in Japan

Date of Issue:1986.3
Author:Tadayoshi Inoue, Katsuji Futagami, Makoto Serizawa, Nobuo Fujiwara

In order to provide reference material for future roadside tree maintenance, this report surveys the current status of roadside trees in Japan, lists representative roadside tree landscapes, and proposes effective roadside tree management methods.

Civil Engineering Research Institute Information No. 2318

A Transition of Bypass Road-scape

Date of Issue:1986.3
Author:Osamu Shinohara, Katsuji Futagami, Makoto Serizawa

This report analyzes how the road landscape of the bypass has changed since it was first used, categorizes the landscape transition patterns, identifies the transition periods, and identifies landscape preservation factors.

Civil Engineering Research Institute Information No. 2314

FY1984

Environmental Impact Assessment Method of Mountain-Road Part2 -Forecasting Technique, Vegetation Recovery and Landscape, Evaluation of Cutting -Slope-

Date of Issue:1985.3
Author:Makoto Serizawa, Osamu Shinohara, Katsuji Futagami

This report summarizes the results of a study on a cut slope as part of the probability of environmental impact assessment methods for mountain roads, including a prediction method for occurrence, determination of vegetation recovery, and landscape evaluation.

Civil Engineering Research Institute Information No. 2173

FY1983

Utilization of treated-sewage-water at planting area of a park -Case study at sandy area-

Date of Issue:1983.12
Author:Makoto Serizawa, Juntaka Tashiro, Kenji Koseki, Nobuo Fujiwara

Based on the results of irrigation tests of secondary treated water to trees and lawns in Uminonakamichi Seaside Park, this report examines the use of secondary treated water in parks from the viewpoints of water quality, soil, plant growth, and irrigation methods, and summarizes the results.

Civil Engineering Research Institute Information No. 2033

FY1982

Study on Estimation for Growth of Growth of Road-side Vegetation (1)　-Choice of Appropriate Indication for Estimation of Growth-

Date of Issue:1983.3
Author:Makoto Serizawa, Juntaka Tashiro, Kenji Koseki, Nobuo Fujiwara

Makoto Serizawa, Junko Tashiro, Kenji Koseki, and Nobuo Fujiwara In order to prepare materials for easy determination of the growth rate of roadside plantings in the field, effective indicators for determining the growth rate were selected from the results of a survey of actual growth conditions, and a policy for setting a judgment standard value (classification value) was organized. In addition, we analyzed the relationship between the conventional vitality evaluation values and effective indicators, and examined the simplification of the vitality evaluation method and summarized the results.

Civil Engineering Research Institute Information No. 1966

Study on Landscape Planning Systems of Roads and Streets (2) Classification and Estimation of By-pass Landscape

Date of Issue:1983.3
Author:Makoto Serizawa, Osamu Shinohara, Katsuji Futagami

The study used 66 photographs of road interior landscapes of national highway bypasses in the Kanto region, and analyzed the classification of landscape types and evaluation factors, identifying seven types, including natural landscape, rural landscape, and mixed landscape. The results are summarized in this report.

Civil Engineering Research Institute Information No. 1910

FY1981

Study on Landscape Planning Systems of Roads and Streets (1) -Frames of Planning and Design Systems-

Date of Issue:1982.1
Author:Makoto Serizawa, Osamu Shinohara, Katsuji Futagami

This report summarizes the results of the landscape planning framework for urban arterial streets, urban general streets, and suburban arterial streets, based on the planning and design process and the types of objects to be operated.

Civil Engineering Research Institute Information No. 1755