scholarly journals One-dimensional coupled modeling of bed evolution and bank erosion processes in the Middle Yangtze River

2019 ◽  
Vol 64 (7) ◽  
pp. 725-740
Author(s):  
Junqiang Xia ◽  
Shanshan Deng ◽  
Meirong Zhou ◽  
Fenfen Lin
Keyword(s):  
Yangtze River ◽  
Bank Erosion ◽  
Coupled Modeling ◽  
One Dimensional ◽  
Erosion Processes ◽  
Bed Evolution

scholarly journals ONE DIMENSIONAL ALALYSIS ON BED EVOLUTION WITH BANK EROSION OF A STRAIGHT CHANNEL

2005 ◽  
Vol 49 ◽  
pp. 985-990
Author(s):  
Satoru NAKANISHI ◽  
Kazuyoshi HASEGAWA ◽  
Keigo TAKAHASHI
Keyword(s):  
Bank Erosion ◽  
Straight Channel ◽  
One Dimensional ◽  
Bed Evolution

Coupled modeling of bed deformation and bank erosion in the Jingjiang Reach of the middle Yangtze River

2019 ◽  
Vol 568 ◽  
pp. 221-233 ◽  
Author(s):  
Shanshan Deng ◽  
Junqiang Xia ◽  
Meirong Zhou ◽  
Fenfen Lin
Keyword(s):  
Yangtze River ◽  
Bank Erosion ◽  
Coupled Modeling ◽  
Bed Deformation

scholarly journals A low-cost technique to measure bank erosion proces ses along middle-size river reaches

2018 ◽  
Author(s):  
Gonzalo Duró ◽  
Alessandra Crosato ◽  
Maarten G. Kleinhans ◽  
Wim S. J. Uijttewaal
Keyword(s):  
Laser Scanning ◽  
Spatial Scales ◽  
Low Cost ◽  
Bank Erosion ◽  
Water Levels ◽  
Small Scale ◽  
Observation Distance ◽  
River Bank ◽  
Erosion Processes ◽  
Rtk Gps

Abstract. Diverse methods are currently available to measure river bank erosion at broad-ranging temporal and spatial scales. Yet, no technique provides low-cost and high-resolution to survey small-scale bank processes along a river reach. We investigate the capabilities of Structure-from-Motion photogrammetry applied with imagery from an Unmanned Aerial Vehicle (UAV) to describe the evolution of riverbank profiles in middle-size rivers. The bank erosion cycle is used as a reference to assess the applicability of different techniques. We surveyed 1.2 km of a restored bank of the Meuse River eight times within a year, combining different photograph perspectives and overlaps to identify an efficient UAV flight to monitor banks. The accuracy of the Digital Surface Models (DSMs) was evaluated compared with RTK GPS points and an Airborne Laser Scanning (ALS) of the whole reach. An oblique perspective with eight photo overlaps was sufficient to achieve the highest relative precision to observation distance of ~1:1400, with 10 cm error range. A complementary nadiral view increased coverage behind bank toe vegetation. The DSM and ALS had comparable accuracies except on banks, where the latter overestimates elevations. Sequential DSMs captured signatures of the erosion cycle such as mass failures, slump-block deposition, and bank undermining. Although this technique requires low water levels and banks without dense vegetation, it is a low-cost method to survey reach-scale riverbanks in sufficient resolution to quantify bank retreat and identify morphological features of the bank failure and erosion processes.

Ar–Ar muscovite dating as a constraint on sediment provenance and erosion processes in the Red and Yangtze River systems, SE Asia

2010 ◽  
Vol 295 (3-4) ◽  
pp. 379-389 ◽  
Author(s):  
Long Van Hoang ◽  
Peter D. Clift ◽  
Darren Mark ◽  
Hongbo Zheng ◽  
Mai Thanh Tan
Keyword(s):  
Yangtze River ◽  
Sediment Provenance ◽  
River Systems ◽  
Se Asia ◽  
Erosion Processes

Research on Jiepai Riverbed Evolution Law and its Evolution Trend Forecast in Middle Yangtze River

2014 ◽  
Vol 926-930 ◽  
pp. 4292-4297
Author(s):  
Cheng Tao Huang
Keyword(s):  
Sediment Transport ◽  
Yangtze River ◽  
Mathematic Model ◽  
Beach Erosion ◽  
Main Stream ◽  
Reservoir Impoundment ◽  
Close Relationship ◽  
Bed Evolution ◽  
The Right ◽  
Evolution Trend

After Three Gorges reservoir impoundment, sediment transport and bed evolution characteristic had changed in the lower Yangtze River. Based on the observational data, sediment transport and bed evolution characteristic of Jiepai reach had been analyzed. The results showed that Jiepai reach evolution had a close relationship with income flow and sediment conditions. In recent years, the income flow and sediment conditions were propitious to the development of left slot of heart beach. It also had accelerated the low beach erosion in transition section and siltation in Xindijia. A 2-D mathematic model and river physical model had been used to forecast the river evolution trend. The results showed that the staggered beach would still not stay steady with the reservoir impoundment. The periodic time of evolution could become longer. Xiru bank beach in right bank of upper Jiepai reach would deposit and move downwards. The main stream discharge would centralize and increase. The left channel of heart reach would be eroded and the right one would dwindle gradually by the squeezing of the heart reach. The right branch channel, as the main navigation channel, would deposit and become shallow. The transition reach would move downwards at outlet of left channel. The riffle would present a staggered shape and left branch channel would dwindle gradually. The waterway transportation condition would get worse.

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