scholarly journals China National Flash Flood Disasters Investigation and Assessment

10.29007/7zjd ◽  
2018 ◽  
Author(s):  
Xiaolei Zhang ◽  
Liang Guo ◽  
Ronghua Liu ◽  
Qi Liu ◽  
Qiuling Yao ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Flood Control ◽  
Flash Flood ◽  
Site Investigation ◽  
Flood Management ◽  
Information Support ◽  
Future Application ◽  
Human Settlement ◽  
Rainfall Index ◽  
Flood Disasters

National Flash Flood Disasters Investigation and Assessment project is the largest non-engineering projects in water conservancy industry in China, and also the largest scale of general census on disasters’ background in flood management and mitigation fields. Through general census, on-site investigation, field measurement, hydrological analysis and calculation, the spatial distribution, human settlement, underground situations, social and economic impacts, hazard zoning, warning indicators of flash flood disasters were collected, the storm flood characters in mountainous areas were analyzed, the flood control ability of selected villages were assessed, the critical rainfall index of these villages were obtained, and the hazard zones were finally identified, all of which provided a strong information support for flash flood early-warning and forecast and residential safety transfer. This paper systematically introduced the key technical focuses, made a general review on the data and information collected, and discussed the spatial distribution pattern of these elements. Based on these survey data, the characteristics of flash flood disaster prevention areas, the human settlement features and storm flood spatial distribution situation were further analyzed. In the end of this paper, future application and analysis on diversified utilization of national flash flood disasters investigation and assessment results were proposed.

scholarly journals The simulation model for a flood management by flood control facilities

2018 ◽  
Vol 245 ◽  
pp. 15002 ◽  
Author(s):  
Roman Davydov ◽  
Valery Antonov ◽  
Dmitry Molodtsov ◽  
Alexey Cheremisin ◽  
Vadim Korablev
Keyword(s):  
Mathematical Models ◽  
Flood Control ◽  
Flood Management ◽  
Hydroelectric Power Station ◽  
Hydroelectric Power ◽  
Operating Characteristics ◽  
Hydro Power ◽  
Operation Modes ◽  
Wide Range ◽  
Environmental Requirements

The rapid spread of storm floods over large areas requires flood management throughout the river basin by the creation an innovative system of flood control facilities of various functional purposes distributed in the area. The central part of the system is the hydro system with hydro power plant. In addition, the flood control facilities on the side tributaries with self-regulating reservoir are included in the system. To assess the effect of controlling extreme water discharges by flood control facilities, it is necessary to develop special mathematical models reflecting the specifics of their operation. Unified mathematical models of the operation modes of a hydro complex with hydroelectric power station and flood control facility are created. They are implemented in a computer program that provides the ability to determine the main parameters and operating characteristics of hydro systems when performing multivariate calculations in a wide range of initial data. This makes possible specifying the parameters and operation modes of each hydro system with the current economic and environmental requirements, to assess the energy-economic and environmental consequences in the operation of the system of flood control facilities distributed in the area. The article analyses the results of the extreme water discharge’s regulation by the hydro system on the main river and flood control facilities on the side tributaries, considering environmental requirements.

Spatiotemporal evolution and driving factors of China’s flash flood disasters since 1949

2018 ◽  
Vol 61 (12) ◽  
pp. 1804-1817 ◽  
Author(s):  
Yesen Liu ◽  
Zhenshan Yang ◽  
Yaohuan Huang ◽  
Changjun Liu
Keyword(s):  
Flash Flood ◽  
Driving Factors ◽  
Spatiotemporal Evolution ◽  
Flood Disasters

scholarly journals Geomatic-Based Flood Loss Assessment and Its Application in an Eastern City of China

Water ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 126
Author(s):  
Youjie Jin ◽  
Jianyun Zhang ◽  
Na Liu ◽  
Chenxi Li ◽  
Guoqing Wang
Keyword(s):  
Spatial Resolution ◽  
Loss Rate ◽  
Flash Flood ◽  
Economic Loss ◽  
Economic Losses ◽  
Risk Level ◽  
Loss Assessment ◽  
Flood Loss ◽  
Flood Disasters

Flash-flood disasters pose a serious threat to lives and property. To meet the increasing demand for refined and rapid assessment on flood loss, this study exploits geomatic technology to integrate multi-source heterogeneous data and put forward the comprehensive risk index (CRI) calculation with the fuzzy comprehensive evaluation (FCE). Based on mathematical correlations between CRIs and actual losses of flood disasters in Weifang City, the direct economic loss rate (DELR) model and the agricultural economic loss rate (AELR) model were developed. The case study shows that the CRI system can accurately reflect the risk level of a flash-flood disaster. Both models are capable of simulating disaster impacts. The results are generally consistent with actual impacts. The quantified economic losses generated from simulation are close to actual losses. The spatial resolution is up to 100 × 100 m. This study provides a loss assessment method with high temporal and spatial resolution, which can quickly assess the loss of rainstorm and flood disasters. The method proposed in this paper, coupled with a case study, provides a reliable reference to loss assessment on flash floods caused disasters and will be helpful to the existing literature.

A Prelim Investigation on Social Media Usage as Risk Communicational Platform for Klang Valley Flash Flood Management

2021 ◽  
Author(s):  
Nur Hasniza Illias ◽  
Nurazean Maarop ◽  
Noor Hafizah Hassan ◽  
Ganthan Narayana Samy
Keyword(s):  
Social Media ◽  
Flash Flood ◽  
Flood Management ◽  
Media Usage ◽  
Klang Valley

Research on the Challenges and Solutions of Urban Flood Control System of Nanjing City

2014 ◽  
Vol 641-642 ◽  
pp. 84-87
Author(s):  
Xin Wen ◽  
Guo Hua Fang
Keyword(s):  
Control System ◽  
Flood Control ◽  
Drainage System ◽  
Flood Management ◽  
Urban Flood ◽  
Technology Application ◽  
Management Technology ◽  
Nanjing City ◽  
System Improvement ◽  
Reform And Opening Up

Currently, the development of flood control system of Nanjing City has been entering a new critical phase, facing some great challenging problems that never experienced before. To meet these challenges, this research initially reviewed the developing process of flood control system of Nanjing City after China's reform and opening up. Based on the analysis of current flood control situation, four major challenge of was summarized. To solve these problems, this research provided some productive suggestions for future development of flood control system of Nanjing City from six perspectives, namely principle of flood control, layout of flood control system, drainage system improvement, flood management, technology application and supporting measures.

Flood Disaster in Japan

2007 ◽  
Vol 2 (1) ◽  
pp. 3-10 ◽  
Author(s):  
Kazuya Inoue ◽  
Keyword(s):  
Social Factors ◽  
Urban Areas ◽  
Flood Control ◽  
Control Policy ◽  
Material Damage ◽  
Urban Flood ◽  
Flood Disasters ◽  
Development Accounting ◽  
New Type ◽  
Area Development

Progress against flood disasters since the end of Word War II has shown that although human casualties have sharply decreased, material damage has not, despite improvements in flood control facilities. This is partly due to the increased concentration of buildings, infrastructures, and other assets in urban areas. Both natural and social factors are listed, and the implementation of suitable flood control policies is indispensable to saving lives and mitigating disasters in the future. Urban flood disasters are focused as a new type disaster explained in detail, stressing a combination of structural and non-structural measures and wide-area development accounting for both rivers and their entire basins to distribute the load in terms of flood control policy.

An Experimental Study on Flood Control Capability of Dry Dams Constructed in a Series

2015 ◽  
Vol 10 (3) ◽  
pp. 467-474 ◽  
Author(s):  
Hideo Oshikawa ◽  
◽  
Yuka Mito ◽  
Toshimitsu Komatsu ◽  
◽  
...  
Keyword(s):  
Experimental Study ◽  
Flood Control ◽  
Laboratory Experiments ◽  
Slide Gate ◽  
Reservoir Capacity ◽  
Control Effect ◽  
Flood Disasters ◽  
Control Capability ◽  
Cascade Method ◽  
Large Dam

The new Cascade concept of flood control is demonstrated in laboratory experiments in which upstream dams in a series of dams constructed along a river overflow from emergency spillways while the final downstream dam is required only to use its normal spillway and never do its emergency spillway. Multiple small dry dams lacking a slide gate in a normal spillway should be constructed in a series rather than as a single large dam to prevent flood disasters and to preserve the natural environment. Dry dams for flood control have recently been reviewed, planned, and built at sites in Japan. In this paper, we compare the Cascade method to conventional flood control in laboratory experiments conducted based on the condition that dams all have the same reservoir capacity. Results have shown that the Cascade method using multiple dry dams was considerably more effective than conventional flood control. Furthermore, the additional flood control effect of a dry dam equipped with closable and openable gate in its regular spillway was experimentally confirmed although there is no such kind of the gate on an ordinary dry dam. This new dry dam should be constructed in the river’s upper reaches away from the existing downstream storage dam needing still more its capacity for water utilization, thus ensuring the amount of water available by closing the regular spillway after the dry dam is filled to capacity. The flood control capacity of dams including the new dry dam is stronger than that of an ordinary storage dam thanks to the dry dam’s storage function.

scholarly journals MICROGEOGRAPHIC SONG DIALECTS IN THE ORANGE-TUFTED SUNBIRD (NECTARINIA OSEA)

Behaviour ◽  
2000 ◽  
Vol 137 (12) ◽  
pp. 1613-1627 ◽  
Author(s):  
Noam Leader ◽  
Yoram Yom-Tov ◽  
Jonathan Wright
Keyword(s):  
Spatial Distribution ◽  
Peak Frequency ◽  
Sharp Boundary ◽  
Human Settlement ◽  
Terminal Part ◽  
Urban Neighborhood ◽  
Song Variation ◽  
Historical Processes ◽  
Song Dialects ◽  
Occupied Territories

AbstractIn a study of male song in the orange-tufted sunbird (Nectarinia osea) in an urban neighborhood in Ramat-Aviv, Israel, we discovered the occurrence of song variation on a microgeographic scale in the form of two distinct dialects with a sharp boundary between them. The main distinction between the two song dialects is the frequency of the trill, which comprises the terminal part of the song. A large difference of 2-3 kHz in the peak frequency of the trill was discovered between the two dialects, which could be easily distinguished by ear. Thirtyseven males were recorded singing the 'low' dialect and 21 birds sang the 'high' dialect. Four other birds sang both dialects or 'hybrid' songs. Along the boundary that separated the two dialect populations, neighboring birds sang different dialect songs, although they were only 20-30 meters apart. All four 'bilingual' birds occupied territories near the dialect boundary. The historical processes leading to the formation of this dialect system may result from the pattern of human settlement at the time of the establishment of this neighborhood in the early 1950's. The spatial distribution of the two sunbird dialect populations, and the apparent low dispersal rates of birds from their natal dialect area, suggest the existence of a mechanism, which currently maintains these dialects at the current boundaries.

Jute in the Brahmaputra Valley: The making of flood control in twentieth-century Assam

2015 ◽  
Vol 49 (5) ◽  
pp. 1405-1441 ◽  
Author(s):  
ARUPJYOTI SAIKIA
Keyword(s):  
Twentieth Century ◽  
British Empire ◽  
Flood Control ◽  
Flood Management ◽  
The Political ◽  
Brahmaputra Valley ◽  
Commercial Crop ◽  
State Capital ◽  
The Cost ◽  
Partial Success

AbstractFlood protection in the Brahmaputra's floodplains began rather late and was implemented precisely to protect the important commercial crop of jute. To begin with, in the early twentieth century, after a long wait and much speculation, action was finally taken to make the Brahmaputra's floodplains more productive to the British Empire. Soon the commercial production of jute began in the floodplains. This article explains how the Brahmaputra's floodplains were converted into the British empire's eastern-most jute frontier. The article also explains the political economy of flood management in Assam in the second half of the twentieth century. Further, explaining the shifting relations between state, capital, and floodplain, the article shows how these schemes achieved only partial success and at the cost irreversible ecological damage.

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