نتایج جستجو برای: river training

تعداد نتایج: 400668  

2010
A. W. Jayawardena T. M. K. G. Fernando

A multi-layer perception neural network trained with the backpropagation algorithm is adopted to make daily river flow forecasts at the Nakhon Sawan gauging station on the Chao Phraya River in Thailand. Lead times from 1 day to 28 days have been used. The predicted flow rates when compared with observed ones agree within acceptable limits for both training and testing data for most of the consi...

2009
Robert H. Meade John A. Moody

Before 1900, the Missouri–Mississippi River system transported an estimated 400 million metric tons per year of sediment from the interior of the United States to coastal Louisiana. During the last two decades (1987–2006), this transport has averaged 145 million metric tons per year. The cause for this substantial decrease in sediment has been attributed to the trapping characteristics of dams ...

2008
W. Dorner

Peak and volume of river flows are functions of the catchment surface characteristics. This means that any impacts to the run-off regime (for example surface sealing and river training) could affect people and land users in the lower system. The costs of flood defence or compensation of damages are usually not included in the economic calculation of the upstream land owner or land user. In econ...

B.S Mosavi M Saneie

River banks are exposed to bank erosion and destruction. One of the river engineering goals is to provide human life requirements and reduce river danger. So spreading extent of this phenomenon, whose risk and other important factors must be recognized. Using groins is one of the control ways that by accurate design and accurate performance, bank erosion control and field reclamation would be p...

Journal: :IOP Conference Series: Materials Science and Engineering 2019

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Rivers have a complicated and various condition in the diverse environment, and various science such as Hydrology, geomorphology, hydraulic, ecology and engineering have it been discussed. River geomorphology with studying of river process and landforms, examination of river landscape evolution, can be playing an important role in identifying of river channel character and behavior. To order th...

2016
Haixin Liu Xiaoliang Meng Tao Jiang Xinxia Liu Anbing Zhang

Satellite data have been widely used in the detection of vegetation area changes, however, the lack of historical training samples seriously limits detection accuracy. In this research, an iterative intersection analysis algorithm (IIAA) is proposed to solve this problem, and employed to improve the change detection accuracy of Phragmites area in the Detroit River International Wildlife Refuge ...

2011
PHILIPPE HELLER

Alpine rivers have been channelized by significant river training works in the past two centuries and are now disconnected from their natural environment. In addition, their flow regime is often affected by hydropower plant operation. Also the risk of flood damages is increasing continuously due to urbanization requiring additional flood protection measures. Nevertheless, such trained rivers st...

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