Rooftop greening system soil runoff experiment: Tray method vs. evergreen Kiri grass bag method.

basic information

This is a method of evergreen sedum bag system® (FTM bag) utilizing zipper-type planting bags. It is a triple intellectual property product consisting of a bag system (Patent No. 4911418 + Registered Trademark No. 6125712) and variety registration (Variety Registration No. 15866). The triple intellectual property of the evergreen sedum bag system (patent, trademark, and variety registration) leads to successful rooftop greening. 1. Prevents the intrusion of weeds. 2. Prevents soil runoff. 3. Easy installation with a zipper. The standard size of the bag system is 50 cm square, with a wet weight of 13 kg per piece. There is also a rectangular type measuring 15 cm x 100 cm available. Grommet options and custom sizes are possible. The rectangular type is used for wall greening and corrugated roof greening. The bags are made of root-proof sheets, preventing the intrusion of weeds and stopping soil scattering and runoff. The bags allow the evergreen sedum to provide moisture to the soil while preventing soil drying. The site receives bags filled with soil and seedlings of evergreen sedum, so you simply open the zipper of the bag, insert the seedlings, and close the zipper. It is a simple greening system that completes the greening by just arranging the bags with plants.

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Applications/Examples of results

【Evergreen Giraffe Grass Bag Method Achievements】 - Over 500 private facilities - Over 50 public facilities - Numerous others 【Greening Applications】 - Rooftop greening, folded plate roof greening, wall greening, slope greening, erosion control dam greening, road greening, concrete slope greening, environmental greening, weed control under solar panels, etc. 【Applications】 - Government and public facilities - Factories, offices, commercial facilities - Condominiums, residential buildings - Civil engineering structures, erosion control dams, slopes - Ground cover - Weed control

Detailed information

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  Causes of Rooftop Greening Failures: Abnormal Weather In Japan, there have been many instances of damage from typhoons, heavy rains, floods, and landslides across various regions. Additionally, in recent years, there have been widespread heatwaves. In the first place, Japan's temperatures have been rising year by year, with particularly abnormal high temperatures observed during the summer and autumn. Furthermore, not only the rise in temperature but also the extreme drops in temperature during winter are among the abnormal weather phenomena seen in recent years. Amidst the increase in such weather events, various problems have also arisen in rooftop greening. For detailed information on the causes of failures in rooftop greening systems, please visit https://kirinsou.jp/reason/. For information on the evergreen Kirinsou bag method that overcomes the causes and issues of rooftop greening failures, please visit https://kirinsou.jp/system/.

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  Soil Dispersal Experiment One of the reasons for the failure of rooftop greening is "soil dispersal." We conducted a dispersal experiment comparing the rooftop greening systems "bag method vs. conventional method" by creating strong winds using a blower and a circulator. Recently, there has been an increase in abnormal weather, and it is predicted that the number of very strong tropical cyclones with maximum wind speeds exceeding 45 m/s over the sea (or land) is on the rise. In such severe weather, the soil and plants from rooftop greening can be dispersed, causing issues such as clogging drainage systems. For the video of the soil runoff comparison experiment, please visit https://kirinsou.jp/system/#experiment2.

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  Rooftop Greening Revolution: A Fail-Proof Rooftop Greening System "Evergreen Kiri Grass Bag Method" Case Study: Roof Greening This is roof greening using the fail-proof rooftop greening system "Evergreen Kiri Grass Bag Method." Since it is on the roof surface, it is secured with a net to prevent scattering. The Asakusa Culture and Tourism Center is a tourist information facility located in Taito Ward, in front of the Kaminarimon Gate. The first floor features an information counter that supports Japanese, English, Korean, and Chinese, as well as a foreign currency exchange service, while the second floor has a tourist information corner. The top floor, the eighth floor, is a free observation terrace. Due to the existing building being over 50 years old and deteriorating, a competition was held in 2008, and the proposal by Kengo Kuma was adopted. The initial plan had a height of 41.25 meters, but opposition arose from Sensoji Temple and the local shopping district, claiming it would disrupt the harmony of the streetscape, leading to a reduction of about 2 meters, resulting in a height of 38.9 meters. In 2012, it received the Good Design Award. For more details on the rooftop greening revolution and the fail-proof rooftop greening system "Evergreen Kiri Grass Bag Method," please visit https://kirinsou.jp.

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  Rooftop Greening Revolution: A Fail-Proof Rooftop Greening System "Evergreen Kirinsou Bag Method" Case Study: Rooftop Greening (Accommodating Curves) This is a rooftop greening project of approximately 180 square meters using the fail-proof rooftop greening system "Evergreen Kirinsou Bag Method." The greening area is divided into buildings A to D, and the shapes are not rectangular, featuring curves in all sections. This cannot be accommodated by conventional tray-based greening. The Evergreen Kirinsou Bag Method also adapts with square bags of 50cm, 25cm, and rectangular bags of 15cm x 50cm. Since the bags are flexible, they can be shaped on-site to fit the design. Additionally, custom sizes can be ordered, allowing for rooftop greening tailored to the site. The flexibility of the bags also enables greening on curved surfaces. For more details about the rooftop greening revolution and the fail-proof rooftop greening system "Evergreen Kirinsou Bag Method," please visit https://kirinsou.jp.

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  Rooftop Greening Revolution: A Fail-Proof Rooftop Greening System "Evergreen Kiri Grass Bag Method" Case Study: Rooftop Greening (Rooftop Greening by Middle School Students) The students themselves transported materials to the rooftop, planted them in bags, and arranged the bags to complete the rooftop greening. The photo below was taken as a graduation memorial. The school's science club took the lead in this rooftop greening project. The science club measured the temperatures of classrooms that were not greened and the classroom directly below the rooftop greening, using thermography to investigate the temperature distribution in the classrooms. In the classroom directly below the rooftop greening, the overall temperature was shown in blue, confirming the effectiveness of the rooftop greening. For more details on the Rooftop Greening Revolution and the fail-proof rooftop greening system "Evergreen Kiri Grass Bag Method," please visit https://kirinsou.jp.

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  Rooftop Greening Revolution: A Fail-Proof Rooftop Greening System "Evergreen Kiri Grass Bag Method" Case Study: Rooftop Greening (Greening by Children, Rooftop Greening by Middle School Students) To combat the summer heat at the community meeting place, we implemented the Evergreen Kiri Grass Bag Method. The meeting place is a prefab structure, making it quite hot during the summer as the air conditioning does not work well. The greening was done by the children in the community. The bags of Evergreen Kiri Grass come with name tags, allowing participants to write their names on them. By participating in greening activities, the children's feelings towards community building improve, and a sense of attachment to the plaza also develops. For more details on the Rooftop Greening Revolution and the fail-proof rooftop greening system "Evergreen Kiri Grass Bag Method," please visit https://kirinsou.jp.

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  Rooftop Greening Revolution: A Failsafe Rooftop Greening System "Evergreen Kiri Grass Bag Method" Case Study: Slope Greening A sediment control dam, known as a "sabou entei," is a type of dam installed in rivers. It is also referred to as a "sediment control dam." This facility captures harmful sediment such as debris flows that flow down from upstream and gradually releases the accumulated sediment, thereby regulating the amount of sediment flowing downstream. By accumulating sediment in the sediment control dam, the gradient of the river becomes gentler, preventing the riverbed and riverbanks from being eroded, while also reducing the destructive power of debris flows. Additionally, it helps stabilize the foothills on both sides, preventing landslides on the mountain slopes. However, the construction of large concrete walls in mountainous areas can lead to landscape issues. Until now, greening sediment control dams has been difficult, and maintaining that greening has also been challenging. The Evergreen Kiri Grass Bag Method has made it possible to easily green these areas. The greening of sediment control dams blends well with the surrounding scenery. For more details on the Rooftop Greening Revolution and the failsafe rooftop greening system "Evergreen Kiri Grass Bag Method," please visit https://kirinsou.jp.

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  Rooftop Greening Revolution: A Fail-Proof Rooftop Greening System "Evergreen Kiri Grass Bag Method" Case Study: Slope Greening Using the Evergreen Kiri Grass Bag Method, we implemented greening with letters as a landmark for the interchange. Evergreen Kiri Grass is resilient to heat, cold, and drought, making it a low-maintenance plant. It replaces its new shoots around November, ensuring that it does not grow excessively and change the shape of the letters. The bag method is made from weed control sheets, effectively preventing weed intrusion and soil erosion. With this combination of low-maintenance plants and the bag method, it becomes possible to create such lettering through a greening system. For more details on the Rooftop Greening Revolution and the fail-proof rooftop greening system "Evergreen Kiri Grass Bag Method," please visit https://kirinsou.jp.