Damages and Recovery of Farmlands in the Damaged Area of the Mid Niigata Prefecture Earthquake 2004
0
Citation
0
Reference
20
Related Paper
Cite
Citations (1)
At 13h02m, June 16, 1964, a severe earthquake occurred with its epicenter near Awa, Island, 70km to NE of Niigata City. Damages were caused by the earthquake in Niigata and Yamagata Prefectures. Especially, in Niigata City, the damages were severe. Large amount of sand and water jetted out from silt and sand layers about -3--9 m from the surface and as its result many concrete buildings were slanted in various degrees. Tsunami raided into the area near the mouth of the Shinano, so that many houses and factories were flooded and areas near the river course were inundated. Some agricultural land and rural settlements were destroyed. But the damages were limited in old river courses and reclaimed lands of back marshes.
Human settlement
Silt
Epicenter
Sinkhole
Cite
Citations (0)
新潟県中越地方で2001年から2016年までに発生した地すべりの時空間データを用いて, 平成16年新潟県中越地震後の地すべりの分布特性を調査した。その結果, 川口北東部の約17km×17kmの範囲では, 地震前に比べ, 地震後に地すべりが多く発生したことが確認された。この地域で地震後に発生した地すべりの多くは, 地震時の最大加速度や推計震度が大きく, 地震時に地すべりが多発したエリアに分布する傾向を示した。また, 地震後の降雨期 (6～11月) に発生した一部の地すべりは, 発生直前の降雨量が地震前に発生した地すべりのそれより少なかった。さらに, 地震後に発生した地すべりの77％は発生面積1×103m2未満であり, 地震前, 地震時に発生した地すべりの面積に比べかなり小さい傾向にあった。
Cite
Citations (0)
This paper focuses on material properties of more than 400 soils recovered from disaster debris in Iwate Prefecture generated by the 2011 Great East Japan earthquake and tsunami. Analyses in this study verified that recovered materials basically have sufficient quality as geomaterial from the viewpoint of chemical and physical properties, being expected to be utilized in geotechnical applications though additional processes such as mixing of steel slag and crushed concrete affect material properties. Some results raised an experimental concern regarding applicability of existing test standards for assessment of recovered materials.
Slag (welding)
Cite
Citations (1)
Cite
Citations (0)
Toyonaka City (Fig. 1) in Osaka Prefecture was seriously damaged by the recent earthquake in the southern part of Hyogo Prefecture. While the damage cannot be compared with the severe damage experienced in several other cities between Osaka and Kobe, it provides a good example of damage conditions experienced on the periphery of disastrous earthquakes. The author reports on those areas in Toyonaka City where there were many stricken houses (Fig. 2), and tries to investi-gate the correlation between the extent of the earthquake disaster and the local human and physical en-vironment. Figure 3 shows the percentages of the people who lived in completely destroyed houses and in par-tially destroyed ones, and the distribution of building styles in residential houses. The land classifica-tion of Toyonaka City is shown in Fig. 4. For this study, the author used a map of city development made by the Toyonaka City Office (omitted in this paper). The earthquake damage was closely connected with the following three factors: type of building, period of urbanization, and land classification or subsurface geology. In the northern part of Toyo-naka City, earthquake damage was sustained not only in the fan but also in the middle and lower ter-races. The latter district is an old urban area, and many old houses were severely affected by the earth-quake. In the southern part of Toyonaka City, the type of building and land classification were close-ly connected with the earthquake damage sustained. Here we can find many old wooden tenement houses and apartment houses, most of which are included in 'b' or 'c' in Fig. 3; many of them were de-stroyed completely or partially. In addition, the land classification in this area is mostly delta, which is known to be weakened by earthquake shocks. If we classify by age the people who took refuge in evacuation centers (Fig. 3), we find large num-bers of elderly people who lived alone in this area. Many of them lived in old wooden tenement houses or apartment houses, which sustained earthquake damage. If reconstruction projects are carried out, it will be very important for the local government to dis-cuss their efforts with local victims and to take their feelings into account. For their part, the victims should not insist only on their rights, but should consider the ideal future of their own neighbor-hood. It is very difficult to take radical urban planning measures in areas such as Toyonaka City which were only partially destroyed. It will be necessary to develop a long-term urban plan in which re-construction projects for small areas ultimately fit in with long-term redevelopment plans for the wider area.
Cite
Citations (3)
Cite
Citations (0)
Cite
Citations (0)
2007年新潟県中越沖地震の家屋被害データを地理情報システム上に整理し,換算被災率を用いて地震による家屋被害と土地分類や地形・地質特性との相関関係について分析した.論文前半には新潟県中越沖地震の家屋被害の特徴を要因毎に整理し,被害との相関関係を考察した.後半では2004年新潟県中越地震と家屋被害の特徴に関する比較を行ない,震源からの距離による家屋換算被災率の減衰特性について被災事例を検討するとともに,モデル化に関する考査を行った.
Cite
Citations (0)