NTT West Japan About joint demonstration for sustainable forest management

NTT West Japan
Joint demonstration for sustainable forest management
– Contributing to improving the value of forests by “visualizing” the amount of CO2 absorption –

Maniwa City, Okayama Prefecture (Mayor: Noboru Ota, hereinafter referred to as Maniwa City), Nippon Telegraph and Telephone West Corporation Okayama Branch (Branch Manager: Tomohiro Nishikawa, hereinafter referred to as NTT West Okayama Branch), Regional Creation Co Design Institute Co., Ltd. (Representative Director: Hidenori Kigami, hereinafter referred to as Regional Revitalization Co Design Institute) and Sumitomo Forestry Co., Ltd. (President: Toshiro Mitsuyoshi, hereinafter referred to as Sumitomo Forestry) will digitize Maniwa City’s forest information and We conducted a joint demonstration to “visualize” We aim to improve forest value by appropriately evaluating the value of forests and creating
high-quality carbon credits.
[Image 1d32702-323-8e61dc150b9c3773956d-0.png&s3=32702-323-1518a69df612b675003a752e7bc63658-531x399.png
State of drone shooting
1. Background
As Japan’s forest resources are reaching a period of full-scale utilization, it is necessary to properly manage forests and promote the cyclical use of “cutting, using, and planting.” The value of forests must be increased through the use of energy and the creation of carbon credits, while continuing timber production from logging to processing and distribution. Appropriate use and management of forests is required for the realization of regional revitalization based on forest resources in hilly and mountainous areas. Abandoned forests are increasing.
Therefore, Maniwa City, NTT West Japan Okayama Branch, Regional Revitalization Co Design Institute, and Sumitomo Forestry are working to increase the value of forests in the Mikamo district of Maniwa City and achieve sustainable forest management in the future by digitizing forest information to reduce CO2 emissions. We conducted joint demonstrations such as “visualization” of absorption.
The city of Maniwa, which served as the venue for the joint
demonstration, has long been a forestry area typified by the production of Mimasaka cypress. We are making advanced efforts to utilize resources.
2. Overview and results of the demonstration experiment
We acquired and analyzed forest resource data for the cedar and cypress forest (approximately 13 ha) in the Mikamo district of Maniwa City, built a cost simulation model*1 for forest management, and calculated the amount of CO2 absorbed by the forest.
Regarding the cost simulation model, interviews with forest operators to understand the current situation and issues in the region, drone photography and data analysis to digitize forest information, and on-site plot surveys* to improve the accuracy of analysis. It was built by implementing 2. This model enables appropriate forest management and timber production by grasping in advance the forest management cost, which is an issue in various forests.
Regarding the amount of CO2 absorbed by forests, we created
orthoimages*3 of aerial photographs based on data measured by drone lasers, identified cedars and cypresses, and then calculated the height and number of trees and the volume of standing timbers. I was. By multiplying these values ​​with forest information, we obtained the result that the cedar and cypress forests in the survey area absorb approximately 11t-CO2/ha per year*4. (Fig.1, Fig.2)
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Figure 1 Flow of visualization demonstration of CO2 absorption [Image 3d32702-323-f533cff02e186a0e6920-2.png&s3=32702-323-00fbcf573e82bc97401fc5af1a8b491a-958x866.png
Fig. 2 Area distribution of CO2 absorption amount *5 (Enlargement of right figure in Fig. 1)
*1 A system that allows you to set conditions and calculate the cost of forest management
*2 Investigate tree species, number, diameter, and height in order to grasp the volume of trees in the survey area.
*3 An image displayed in the correct size and position without tilting as if viewed from directly above
*4 “Method for calculating carbon dioxide absorption by forests” (December 27, 2021 Notification No. 60 by the Commissioner of the Forestry Agency)
Calculated by *5 For this verification, the amount of CO2 absorption for cedar and cypress forests is displayed, and other broad-leaved trees are not included (not displayed).
3. Role of each company
・Maniwa City: Provision of forest fields
・ NTT West Japan Okayama Branch: Overall coordination of
demonstration, forest survey using ICT, construction of analysis business, verification of business feasibility
・Regional Revitalization Co-Design Research Institute: Planning to visualize the amount of CO2 absorbed by forests, consideration of sustainable forest development using carbon credits
・Sumitomo Forestry: Analysis of forest resources and CO2 absorption, utilization of analysis data such as zoning, construction of a cost simulation model
4. Future prospects
Based on the CO2 absorption data obtained from the demonstration, we aim to create carbon credits using the “J-Credit” system*6 in the forests of Maniwa City. Proceeds from the sale of credits will be used for forest maintenance costs such as thinning and planting, promoting the cyclical use of forests and supporting sustainable forest management in Maniwa City.
By utilizing the cost simulation model constructed this time and horizontally deploying it to other regions, we will promote the efficiency of forestry operations based on the environment surrounding forests in each region. In addition, by continuously improving the cost simulation model, we will promote efforts to improve the functions of forests as CO2 absorption sources and create new sources of revenue.
*6 A system in which the government certifies the amount of greenhouse gas emissions reduced and absorbed through the introduction of energy-saving/renewable energy equipment and forest management as “carbon credits.” Certified credits can be bought and sold and used for various purposes such as carbon offsetting by companies and organizations.
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