Heavy Rainfall Disaster Research Articles

PREDICTABILITY OF THE HEAVY RAINFALL DISASTER AT KANI CITY IN JULY 2010 BASED ON MODEL ENSEMBLE FORECASTS

The predictability of the heavy rainfall disaster at Kani City, Japan in July 2010 is investigated using a model ensemble approach which relies on the combination of 32 member ensembles obtained from multiple parameterizations in the mesoscale meteorological model PSU/NCAR MM5. The model is initialized using the 20-km resolution global analyses JMA GSM-GPV with and without the radar-data assimilation system developed by Yoshino et al. (2009). It is found that the multi-parameterization ensemble forecasts averaged by 32 members during 24 hours are very skillful in indicating the area of severe local storm activity, while each member deviates largely from the ensemble mean. Furthermore, the radar-assimilated ensemble forecasts enable us to more precisely predict the area of greatest rainfall potential, because the initial conditions used here realistically represent 3-dimensional distributions of cloud microphysical properties in the atmosphere.

AN ANALYSIS OF UNDERSTANDING OF INTERNET USERS FOR HEAVY RAINFALL DISASTER INFORMATION

Understanding of Internet users for real-time precipitation or water level information was researched based on Internet questionary survey in February 2007. The percentage of recognition for “River Disaster Prevention Information”, administrated by River Bureau, was only 4.7%. It is hardly different from the result of similar survey in 2004. Even if real-time heavy rainfall disaster information Web pages were introduced to respondents, the answer with a clear use intention was about 10%. The use intention of cellular phone web pages was still lower. “The television is more useful for an emergency” etc. was mentioned as the reason. It is possible that even if well-known to these pages, many people may not use. There is no doubt about public presentation of information is important. However, it is also important to develop simple information communication system to general public for heavy rainfall disaster prevention.

An analysis of human damage caused by heavy rainfall disaster in July 2006.

An analysis of human damage caused by heavy rainfall disaster in July 2006.

ANALYSIS ON THE CONSCIOUSNESS ABOUT DEPARTURE BEHAVIOR AND TRAFFIC MEASURES BY USING DRIVER’S EXPERIENCE DATA UNDER DOWNPOUR

The downpour which had occurred in Nagoya city area from September 11 to 12, 2000 had caused severe damage to the city’s traffic network, and highlighted the problem about the method of giving information, traffic management, and driver’s behavior under the downpour. Therefore, in this paper, we focus on automobile traffic, and aim to consider the traffic information and traffic management for promoting driver’s appropriate behavior under a heavy rainfall disaster. Especially, we analyze driver’s consciousness and activity under downpour by using driver’s experience data, and develop departure behavioral models of drivers under downpour in order to analyze the relationship between the driver’s departure behavior and the traffic network and rainfall situation.

Effect of Frequency of Heavy Rainfall Disasters on Improvements of Disaster Prevention System in Municipality Offices

Effect of Frequency of Heavy Rainfall Disasters on Improvements of Disaster Prevention System in Municipality Offices

Damages on Rice by Heavy Rainfall Disasters Occurred in Fukui Prefecture on July, 2004(An Analysis of the Agricultural Damage Resulting from the 2004 Hokuriku Area Typoon and Flood)

Damages on Rice by Heavy Rainfall Disasters Occurred in Fukui Prefecture on July, 2004(An Analysis of the Agricultural Damage Resulting from the 2004 Hokuriku Area Typoon and Flood)

Analysis on Traffic Measures and Driver's Behavior Consciousness under the Heavy Rainfall Disaster

The rainfall disaster occurred during a period between 9.11 and 9.12, 2000 caused severe damage to Nagoya city's traffic network and highlighted the problem about the way to give information and traffic management under the disaster. Therefore, in this paper, we aim to consider the way to information and traffic management to promote driver's appropriate behavior under the heavy rainfall disaster based on driver's experience data.Specifically, we develop departure behavior models for drivers under the disaster and apply the model to the analysis of road network situation by using GIS.

Changes and the Characteristics of Heavy Rainfall Disasters in Japan

Changes and the Characteristics of Heavy Rainfall Disasters in Japan

DYNAMIC FLOOD SIMULATION FOR INUNDATION FLOW OF THE URBAN AREA IN THE ONGA RIVER BASIN

A filed study and dynamic flood simulation on the Onga River heavy rainfall disaster in July 18-21, 2003 were conducted. Firstly, the flood process in the Iizuka-city area, which suffered the greatest damage in the Onga basin, was examined based on field study. Secondly, the flood simulation model was applied to the Iizuka-city area. The water movement in the urban area including the Onga River, main branch rivers was simulated simultaneously and the computed results compared with the flood process examined in the field study. Finally, the effect of the river improvements on the flood damage was examined through the numerical simulation. It shows that the model is a useful tool for examining the effects of the improvement work of a main river to inundation flows from tributary rivers.

Comparative survey of heavy rainfall disaster information between Taiwan and Japan

Comparative survey of heavy rainfall disaster information between Taiwan and Japan

AN OUTLINE OF HEAVY RAINFALL DISASTERS IN HIDAKA REGION, HOKKAIDO, BY TYPHOON NO.10, 2003

The typhoon No.10 hit the Pacific cost in Hokkaido on August 9 in 2003. The casualties were 10 killed and 3 wounded. The missing person has not been found yet. This typhoon gave the biggest damage by flood to Hokkaido in the last twenty years. In Saru River basin and Appetu River basin in Ilidaka region, serious damages, such as flooded house, house failure and bridge fall, occurred by this typhoon. Farmland and flood plain were covered for the large sediment.In this paper, we will report an outline of heavy rainfall disasters of Hidaka region in Hokkaido by the typhoon No.10. We hope that the result of this investigation helps to clarify the mechanisms of the heavy rainfall disasters with hydrologic and hydraulic knowledge.

A research on how to utilize real-time rainfall information on the Kyusyu heavy rainfall in 2003

The purpose of this paper was to investigate how to collect and use real-time rainfall and water-level information obtained at the time of Kyusyu heavy rainfall disaster between July 19 and 21, 2003. In Fukuoka city, heavy inundation damage was caused by the rainfall. The Hakata Miyako Hotel, located in the centrala rea of Fukuokacity, was protected against inundation damage; this hotel collected had rainfall and river water-level information through the “Fukuoka city disaster prevention homepage” and established rules for an inundation prevention plan. The hotel suffered heavy inundation damage in 1999, and took action to safeguard against a reoccurrence. Duringthe heavy rainfall of 2003, 19 persons in Minamata city were killed by debris flow. Although the Minamata city office had real-timer ainfall and water-level information teiminals, an evacuation counsel had not ordered before the debris flow occurred. It is possible that this was due to the following: the an nouncement of a heavy rainfall alarmwas overdue, the municipal staff had not yet mastered usage of the information terminals, etc.Construction of areal-time information system alone is not effective for disaster prevention. It is necessary to provide thorough and continuous education for users of that real-time information system.

A research of how to use disaster information by local governments for heavy rainfall

The purpose of this paper is an investigation of how to collect and use heavy rainfall disaster information by local governments. Questionnaire data were gathered from 230 municipalities within Iwate, Miyagi, Fukushima, Gifu, and Mie prefectures. They were struck by typhoon No.0206 in July 2002. 32 municipalities issued evacuation counsel for disaster. A half of it answered that the decisive factor of evacuation counsel was occurrence of damage. The result indicated that it was difficult to issue evacuation counsel in advance of damage. Respondenfs ratios of rainfall information received on real time were as follows: The rainfall data by Meteorological Agency (JMA) was 92 percent, the rainfall and water revel data by Ministry of Land, Infrastructure and Transportation (MLIT) was 72 percent, the rainfall and water revel data by prefecture was 78 percent Respondent's ratios of actually used information were as follows: The data of JMA was 74 percent, the data of MLIT was 38 percent, the data of prefecture was 51 percent It is necessary that the information of JMA and other information is unified. 58 percent municipalities had own raingauge on their office and 87 percent of raingauge data were used in this event. Self-administrated raingauge was relied. Flood hazard maps were made in 10 percent of municipalities. But municipalities of actually used hazard map in this event were a half of those. It is important that practicality of hazard map was verified.

A STUDY ON INTENSION OF A MOVE AFTER HEAVY RAINFALL DISASTER IN TOUKAI AREA

In the area suffered the serious damage from a natural disaster, reconstruction of a life is an important subject for victims. However, there are some victims who think that he wants to pull up a stricken area and move to anothcr placc. So, in this study, we analyze victim's intention of pulling up a stricken area after heavy rainfall disaster in Tokai area. Consequently, it became clear that the two following factors exist as a composition factor of an intention of pulling up a stricken area at least. One of the factors is an aspect of a result that the reconstruction in the stricken area is given up since the damage scale of flood is very serious, so to speak, a direct factor by the disaster. Another factor is an aspect of avoiding a risk, based on uneasiness about a recurrence of a calamity like the heavy rainfall disaster in September, 2000, so to speak, a indirect factor by the disaster.

RESEARCH ON THE SITUATION DEPENDENCE OF DECISION-MAKING OF INHABITANTS EVACUATION BEHAVIOR IN THE TOKAI HEAVY RAINFALL DISASTER

In order to guide the evacuation of inhabitants in times of disaster, there is an official evacuation announcement. However, it has been found that not all inhabitants actually evacuate when such an order is announced. In order to heighten the effectiveness of the evacuation guidance system, it is necessary to grasp the decision-making mechanism of inhabitants in times of disaster.In the time of flood disaster, it is expected that inhabitant's decision-making of evacuation behavior is influenced by the situation of the circumferences, such as the state of flooding, the evacuation announcement, and so on. Therefore in this research, we examined how to sharpen evacuation procedures by analyzing inhabitant's decision-making of evacuation behavior in the heavy rainfall disaster in Tokai district.

A STUDY ON THE ACTUAL CONDITION OF HOUSEHOLD-GOODS DAMAGE AND PRESERVATION ACTION IN HEAVY RAINFALL DISASTER IN TOKAI DISTRICT IN 2000

In a flood disaster, it is thought that the quantity of the household-goods damage is prescribed by the depth of flood. But household-goods damage can be reduced by preparing against flood disaster and preserving household goods during flood disaster. However, it is expected that progress of the flood affects the way of preservation action and inhabitants have to choose either preservation action or evacuation behavior in the time of the flood disaster.In this study, we grasp the actual condition of household-goods damage in heavy rainfall disaster in Tokai District in 2000. Then, we clarify the effect of preparing against flood disaster and preservation action during flood disaster to damage. Moreover, we analyze the relation between preservation action and progress of flood and between preservation action and evacuation behavior.