Spatial and temporal dynamics of river channel migration and vegetation in central Amazonian white-water floodplains by remote-sensing techniques

2009 ◽  
Vol 113 (10) ◽  
pp. 2258-2266 ◽  
Author(s):  
Juliana Maerschner Aguiar Peixoto ◽  
Bruce Walker Nelson ◽  
Florian Wittmann
Author(s):  
B Z Tsydypov ◽  
A A Ayurzhanaev ◽  
V V Chernykh ◽  
B O Gurzhapov ◽  
E Zh Garmaev

Author(s):  
D. Neupane ◽  
P. Gyawali ◽  
D. Tamang

<p><strong>Abstract.</strong> Channel migration becomes the main characteristic of major rivers of Mohana-Macheli watershed of western Nepal. Study of river channel migration of major rivers of watershed using freely available remote sensing show that the channel has shifted to as high as 1000 meters from the original river path over the span of 9 years (2009–2017). The channel migration directly affects the land use and it has direct effect on the flood plain settlements of the study area. Cultivation of sugarcane in sand area is one of the mitigating measures of flood effects and prevent river bank erosion. The study shows that the area of sand is changing disproportionately in the region. This paper presents an enhanced change detection method of river channel migration using remotely sensed images and identification of sand area using classification and interpretation technique.</p>


2019 ◽  
Vol 11 (9) ◽  
pp. 1138 ◽  
Author(s):  
Matthew F. McCabe ◽  
Diego G. Miralles ◽  
Thomas R.H. Holmes ◽  
Joshua B. Fisher

Characterizing the terrestrial carbon, water, and energy cycles depends strongly on a capacity to accurately reproduce the spatial and temporal dynamics of land surface evaporation. For this, and many other reasons, monitoring terrestrial evaporation across multiple space and time scales has been an area of focused research for a number of decades. Much of this activity has been supported by developments in satellite remote sensing, which have been leveraged to deliver new process insights, model development and methodological improvements. In this Special Issue, published contributions explored a range of research topics directed towards the enhanced estimation of terrestrial evaporation. Here we summarize these cutting-edge efforts and provide an overview of some of the state-of-the-art approaches for retrieving this key variable. Some perspectives on outstanding challenges, issues, and opportunities are also presented.


2014 ◽  
Vol 94 (4) ◽  
pp. 49-58 ◽  
Author(s):  
Radislav Tosic ◽  
Novica Lovric ◽  
Slavoljub Dragicevic

The river channel dynamics are result of the complex interaction between natural and human impact. In the presented study, we assessed spatial and temporal dynamics of Bosna river channel migration during 2001-2013 period using orthophoto images and GIS. We have identified that the total area of bank erosion during given period equaled 2.8695 km2, of which 1.2178 km2 were on the left bank and 1.6516 km2 on the right bank. The total area of bank accretion from 2001 to 2013 equaled 2.6841 km2, of which 1.2864 km2 was on the left bank and 1.3977 km2 on the right bank. The Bosna riverbed average movement in the period 2001-2013 was established in the amount of 60.7 m. During this period, the average lateral channel migration was 5.05 m per year. Lateral migration of the Bosna River has caused serious problems: disappearance of arable land, forests, pastures and meadows, economic loss due to the reduction of agricultural. Using statistical analysis of a land use structure changes along the lower part of Bosna River, we obtained the results which show significant lost in arable land. According to results, 42.3 ha of arable land, 171.9 ha forests and 31.8 ha pastures and meadows were lost during 2001-2013 period. The data presented here are significant for practical issues such as predicting channel migration rates for engineering and planning purposes, soil and water management.


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