Typhoon No. 12 hit Kochi Prefecture in the morning of September 3, crossed the Chugoku-Shikoku region, and moved off the Sea of Japan by dawn of September 4. During this period, heavy rains fell over the areas stretching from Kyushu to Hokuriku, centered in the Kii Peninsula. In particular, torrential rains reaching up to 1,800 mm fell over the areas around Kamikitayama Village in Nara Prefecture, and serious damage in the form of floods and inundation was incurred along rivers such as the Totsukawa and Kumanogawa Rivers.
Aerial Photographs (Oblique Photographs) Taken on September 8, 2011
Around Kiho-cho and Kumano City, Mie Prefecture
0908-Mkh01 Slope failure Around Takaoka and Asari, Kiho-cho
0908-Mkh02 Slope failure Around Asari, Kiho-cho
0908-Mkh03 Mud flow Around Asari, Kiho-cho
0908-Mkm01 Slope failure Around Kiwa-cho, Kumano City
0908-Mkm02 Mud flow Around Kiwa-cho, Kumano City
0908-Mkm03 Slope failure & Mud flow Around Ido, Kumano City
0908-Mkm04 Mud flow Around Kiwa-cho, Kumano City
0908-Mkm05 Slope failure Around Kiwa-cho, Kumano City
0908-Mkm06 Slope failure Around Kiwa-cho, Kumano City
Aerial Photographs (Oblique Photographs) Taken on September 6,2011
Around Gojo-City, Totsukawa-village and Kawakami-village, Nara prefecture
0906-NG01 Slope failure & Mud flow Gojo-City
0906-NG02 Slope failure Gojo-City
0906-NG03 Deep-seated landslide Gojo-City
0906-NG04 Deep-seated landslide Gojo-City
0906-NG05 Deep-seated landslide Gojo-City
0906-NG06 Deep-seated landslide of Landslide dams Gojo-City
0906-NG07 Landslide dams Gojo-City
0906-NG08 Slope failure of Landslide dams Gojo-City
0906-NG09 Landslide dams Gojo-City
Maps of Estimated Inundated Areas Derived from TerraSAR-X Data Analysis
We analyzed TerraSAR-X information acquired at 6:00 a.m. on September 4 (Sunday) and created maps of the estimated inundated areas.
*These show the estimated inundated areas (or flooded areas) extracted through automatic processing, and are not necessarily representations of the actual sites.
*The background images are optical satellite images (PSO: PASCO Satellite Ortho) acquired prior to the disaster.
Enlarged view of the area around Kumano City, Mie Prefecture
Enlarged view of the area around Mihama-Cho, Mie Prefecture
Enlarged view of the area around Kiho-Cho, Mie Prefecture
Aerial Photographs (Oblique Photographs) Taken on September 5, 2011
Around Kiho-cho, Mie Prefecture, and Shingu City, Wakayama Prefecture
Around Nachikatsuura-Cho, Wakayama Prefecture
Around Tanabe-City, Wakayama Prefecture
Imaging on September 4, 2011, Using Synthetic Aperture Radar (SAR) Satellite "TerraSAR-X"
|Acquisition dates and times||:||June 19, 2011, 6:01 (JST)
September 4, 2011, 6:01 (JST)
|Angle of incidence||:||35.3°|
The figure on the right is an overlap of images taken prior to the flood (taken on June 19, 2011) and after the flood (taken on September 4, 2011).
The parts shown in red on the map are estimated to be the range of inundation as a result of the floods. Of particular note are the Kumanogawa River tributary Onodanigawa River basin in Mie Prefecture (Kiho-cho, Minamimuro-gun, Mie Prefecture), the Jinnaigawa River, Ichigigawa River, and Shiharagawa River basins, where inundation was observed. In addition, inundation was also observed on the Wakayama Prefecture side, at the Otagawa River basin in the west of Taiji-cho , and the lower basin of the Nachigawa River.
Enlarged view of the area around Kumano-City, Mie Prefecture
Enlarged view of the area around Mihama-City, Mie Prefecture
Enlarged view of the area around Kiho-Cho, Mie Prefecture
Enlarged view of the areas around Kiho-cho, Mie Prefecture, and Shingu City, Wakayama Prefecture
Enlarged view of the area around Shingu-City, Wakayama Prefecture
Enlarged view of the area around Nachikatsuura-Cho and Kushimoto-cho, Wakayama Prefecture
The microwaves transmitted by TerraSAR-X have weak backscattering intensity on the smooth water surface. These were captured as dark shades on the images.
Comparing images taken prior to the flood (taken on June 19, 2011), we observed an expansion in the darkened areas (inundation areas) at the lower basin of the Kumanogawa River and medium and small rivers in Mie Prefecture, as well as in the basin of Otagawa River in Wakayama Prefecture.
The weather at the eastern parts of Kii Peninsula was rainy when imageries were acquired by TerraSAR-X on September 4, 2011.
For that reason, the above images were taken with the synthetic aperture radar (SAR) satellite "TerraSAR-X," which can image even in the midst of falling rain.
(The "Short-term Forecast of Rainfall and Precipitation Analyzed" image on the right was extracted from the website of the Japan Meteorological Agency.)
History of Information Released
From the perspective of understanding the damage situation arising as a result of the disaster, and of providing information to the relevant organizations, PASCO CORPORATION immediately conducted estimates of the damaged areas using SAR satellite images, which are not impacted by weather conditions.
PASCO CORPORATION also waited for weather conditions that would prevent the occurrence of secondary disasters, and then carried out aerial photographic surveys immediately in cooperation with KOKUSAI KOGYO CO., LTD.
We express our deepest sympathy to all who have been affected by the disaster.
We will strive even harder to be of service to all through the application of our spatial information processing and analysis technologies, as well as through our disaster prevention consulting expertise, in order to obtain accurate information on the disaster situation and assist in the recovery of the affected areas.
<TerraSAR-X : InfoterraGmbH, Distribution [PASCO]>
<Aerial photographs : PASCO, KOKUSAI KOGYO, Distribution[PASCO]>
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The copyright for the documents recorded in the disaster and emergency photos of this page belongs to PASCO CORPORATION.
In addition, the copyright for the use of TerraSAR-X in this page is also the property of PASCO CORPORATION.
Please contact us for permission to distribute or copy the information (documents and images) recorded in this page.
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PASCO CORPORATION strived to make the information in this page as accurate as possible at the time of publication; however PASCO CORPORATION does not guarantee integrity or accuracy of the information recorded in this page. PASCO CORPORATION accepts no liability for any loss or damage directly or indirectly, arising from the use of this information or contents. In case the information provided in this page is evidently different from the actual, in order to correct it please contact us.