A Study on Characteristics of the Flood Control Technologies and Water Utilization through Literatures at the Edo Era in AKITA CLAN

1994 ◽  
Vol 14 ◽  
pp. 287-294
Author(s):  
Kazuo HORINO
Keyword(s):  
Flood Control ◽  
Water Utilization ◽  
Control Technologies

PROPOSAL OF CRITERIA TO EVALUATE CLIMATE CHANGE AND RESERVOIR SEDIMENTATION IMPACTS ON FLOOD CONTROL AND WATER UTILIZATION FUNCTIONS OF DAMS

2019 ◽  
Vol 75 (2) ◽  
pp. I_91-I_96
Author(s):  
Hiroyuki KOJIMA ◽  
Gen NAGATANI ◽  
Ikuo KAWAMURA ◽  
Yuichi TANIWAKI ◽  
Makoto KURAHASHI ◽  
...  
Keyword(s):  
Climate Change ◽  
Flood Control ◽  
Reservoir Sedimentation ◽  
Water Utilization

Safety Impact Study of Hydrographs on Reservoir Flood Control

2015 ◽  
Vol 1092-1093 ◽  
pp. 1171-1174
Author(s):  
Wei Xu ◽  
Bao Hong Lu ◽  
Han Wen Zhang ◽  
Xin Tong Xu
Keyword(s):  
Flood Control ◽  
Impact Study ◽  
Water Utilization ◽  
Flood Water ◽  
Reservoir Routing ◽  
Maximum Elevation ◽  
Reservoir Inflow

To compromise between comprehensive flood water utilization and the safety of reservoir flood control, two holistic indices are proposed in this paper, in order to characterize the influence of different reservoir inflow hydrographs on the safety of reservoir flood control, namely, the maximum elevation of reservoir routing (MERR) and the shortest discharging time (SDT).

scholarly journals Quantification of the Risks on Dam Preliminary Release Based on Ensemble Rainfall Forecasts and Determination of Operation

2018 ◽  
Vol 13 (4) ◽  
pp. 637-649 ◽  
Author(s):  
Hironori Inomata ◽  
◽  
Masaki Kawasaki ◽  
Shun Kudo
Keyword(s):  
Flood Control ◽  
Experimental Simulation ◽  
Rainfall Forecasting ◽  
Hydrological Simulation ◽  
Water Utilization ◽  
Control Operation ◽  
Extreme Floods ◽  
Water Users ◽  
Flood Control Operation

Preliminary release conducted at multipurpose dams is the operation which aims to temporarily increase their flood control capacity by releasing water stored for water utilization ahead of a flood based on rainfall forecasts. However, if rainfall forecasts overestimate actual rainfall, there is a risk that the volume needed for water utilization may not fully recover after preliminary release. Consequently, because of apprehension of such a risk, preliminary release has been seldom operated in Japan. This paper introduces the determination of preliminary release based on ensemble rainfall forecasts. First, the two risks related to preliminary release were defined at first. One is the flood control operation for extreme floods, which is conducted when preliminary release has not been conducted or inadequately conducted, whereas the other is the water level may not fully recover to the level needed for water utilization if preliminary release is decided based on rainfall forecasts overestimating actual rainfall. Next, these two risks were quantified using the results from ensemble rainfall forecasting and hydrological simulation. Finally, based on the quantified risks, the operation of preliminary release was decided. The experimental simulation of preliminary release based on ensemble rainfall forecasts was conducted. The flood caused by Typhoon Man-yi in 2013 is selected as the experimental flood, and the Hiyoshi Dam as the experimental dam, where the flood control operation for extreme floods was conducted during the flood. The simulation results of the experimental flood showed that flood control operation for extreme floods would still be required notwithstanding the increased flood control capacity generated by preliminary release. However, the results also showed the possibility that preliminary release can delay flood control operation for extreme floods and considerably reduce the maximum outflow compared with the maximum outflow that would be required when no preliminary release is conducted. In addition, the study found that ensemble rainfall forecasting can be an effective tool to support the formation of a consensus among stakeholders such as dam managers and water users by quantifying and visualizing the risks associated with preliminary release, which cannot be accomplished with the conventional deterministic rainfall forecasting.

scholarly journals Study of Flood Control Capability and Advanced Application of Multiple Dams Constructed in Series

2013 ◽  
Vol 8 (3) ◽  
pp. 447-455 ◽  
Author(s):  
Hideo Oshikawa ◽  
◽  
Yuka Mito ◽  
Toshimitsu Komatsu ◽  
Keyword(s):  
Flood Control ◽  
Large Scale ◽  
Control Method ◽  
Upstream Region ◽  
Small Scale ◽  
Water Utilization ◽  
In Series ◽  
New Type ◽  
Cascade Method ◽  
Cascade Type

The new concept for flood control called ‘Cascade’ method which permits dams to overflow around an upstream region with a sequence of dams constructed in a river is proposed. Multiple small scale dry dams should be constructed in series instead of a large scale dam in order to prevent flood disaster and preserve the natural environment. Recently a flood control dam with a bottom outlet hole as its regular spillway, known as ‘dry dam’, has been reviewed, planned and built in some sites in Japan. Under a condition of a common reservoir capacity, the Cascade type flood control permitting upstream dams to overflow except for the most downstream dam in a river is compared with a conventional one not to overflow each dam in a numerical simulation. As a result, it is made clear that the Cascade method using multiple dry dams is much more effective than the conventional one. In this connection, the Cascade type flood control method permitting upstream dams to overflow from emergency spillways except for the most downstream dam can be applied to normal storage dams with slide gates operated conventionally. Therefore, it could become an effective adaptation method for the global warming problem since it is performed by only changing how to operate slide gates in existing storage dams constructed in series. In addition, we also propose a new type of dry dam that has a closable and openable gate for its regular spillway primarily to retain the water for the water utilization. The new type of dry dam, which should be constructed in the upper reach away from the existing downstream storage dam needing still more its capacity for water utilization, ensures the amount of water available for the use by closing the regular spillway after the new dry dam is at full capacity, and the flood control capacity of the dams including the new dry dam is stronger than that of the normal dams owing to the storage function with the new dry dam. The new dry dams may improve the water utilization, the flood control, and environmentfriendliness under the current condition in Thailand damaged by the severe flood in 2011.

PROPOSAL OF CRITERIA TO EVALUATE CLIMATE CHANGE IMPACTS ON FLOOD CONTROL AND WATER UTILIZATION FUNCTIONS OF DAMS

2018 ◽  
Vol 74 (5) ◽  
pp. I_1333-I_1338
Author(s):  
Hiroyuki KOJIMA ◽  
Gen NAGATANI ◽  
Makoto KURAHASHI ◽  
Ikuo KAWAMURA ◽  
Yoshinobu SATO ◽  
...  
Keyword(s):  
Climate Change ◽  
Flood Control ◽  
Climate Change Impacts ◽  
Water Utilization

scholarly journals Integrated water resources management using engineering measures

2015 ◽  
Vol 366 ◽  
pp. 54-63
Author(s):  
Y. Huang
Keyword(s):  
Water Resources ◽  
Water Resources Management ◽  
Flood Control ◽  
River System ◽  
Integrated Water Resources Management ◽  
Flood Management ◽  
Changjiang River ◽  
Water Utilization ◽  
Resources Management ◽  
Engineering Measures

Abstract. The management process of Integrated Water Resources Management (IWRM) consists of aspects of policies/strategies, measures (engineering measures and non-engineering measures) and organizational management structures, etc., among which engineering measures such as reservoirs, dikes, canals, etc., play the backbone that enables IWRM through redistribution and reallocation of water in time and space. Engineering measures are usually adopted for different objectives of water utilization and water disaster prevention, such as flood control and drought relief. The paper discusses the planning and implementation of engineering measures in IWRM of the Changjiang River, China. Planning and implementation practices of engineering measures for flood control and water utilization, etc., are presented. Operation practices of the Three Gorges Reservoir, particularly the development and application of regulation rules for flood management, power generation, water supply, ecosystem needs and sediment issues (e.g. erosion and siltation), are also presented. The experience obtained in the implementation of engineering measures in Changjiang River show that engineering measures are vital for IWRM. However, efforts should be made to deal with changes of the river system affected by the operation of engineering measures, in addition to escalatory development of new demands associated with socio-economic development.

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