Influence of river channel morphology and bank characteristics on water surface boundary delineation using high-resolution passive remote sensing and template matching

2014 ◽  
Vol 39 (7) ◽  
pp. 977-986 ◽  
Author(s):  
İnci Güneralp ◽  
Anthony M. Filippi ◽  
Billy Hales
Keyword(s):  
Remote Sensing ◽  
High Resolution ◽  
Template Matching ◽  
Water Surface ◽  
Channel Morphology ◽  
River Channel ◽  
Surface Boundary ◽  
Passive Remote Sensing ◽  
River Channel Morphology

scholarly journals THE BENEFITS OF RIVER INDICATORS TO ASSESS THE ECOLOGICAL STATUS OF IIUM CAMPUS

2017 ◽  
Vol 15 ◽  
Author(s):  
Nor Zalina Harun ◽  
Mazlina Mansor ◽  
Safiah Abu Noh
Keyword(s):  
Environmental Impacts ◽  
Anthropogenic Activities ◽  
Ecological Status ◽  
Structured Interview ◽  
Channel Morphology ◽  
River Channel ◽  
Physical Planning ◽  
Natural Ecosystem ◽  
River Channel Morphology ◽  
Ecologically Sustainable

The concept of sustainable campus has emerged from the social, economic and environmental impacts due to anthropogenic activities around the world. One of the initiatives of sustainable campus is the application of ecological indicators. The indicators provide information about the current condition and early warning on the possible risks of environmental impacts to the campus environment. However, lack of understanding on the values of natural ecosystem in campusand the lack of proper planning has led to the depletion of natural ecosystem. The study seeks to examine river degradation in IIUM campus and to explore the benefits of river indicators towards achieving IIUM as an ecologically sustainable campus. Data were gathered using a qualitative approach involving three methods of data collection namely: (i) document analysis, (ii) semi-structured interview and (iii) site inventory. The finding reveals that the application of river channel morphology indicators is an important basis for physical planning in making a campus ecologically sustainable. Further analysis suggests that the suitable indicators to assess the condition of IIUM River are the river channel morphology indicators such as width, depth, channel pattern and slope ratio. The process of selecting the indicators are carried out based on six criteria of good indicators discussed in this study. The study concluded that the application of river channelmorphology indicators is a critical process in physical planning of a sustainable campus as it contributes in preventing the loss of natural ecosystem and it offers a credible basis for creating a conducive place for campus residents.

scholarly journals Single Shot MultiBox Detector for Urban Plantation Single Tree Detection and Location With High-Resolution Remote Sensing Imagery

2021 ◽  
Vol 9 ◽  
Author(s):  
Yueyuan Zheng ◽  
Gang Wu
Keyword(s):  
Remote Sensing ◽  
High Resolution ◽  
Error Detection ◽  
Template Matching ◽  
Local Maximum ◽  
Single Shot ◽  
Tree Detection ◽  
Single Tree ◽  
Watershed Method ◽  
Individual Trees

Using high-resolution remote sensing images to automatically identify individual trees is of great significance to forestry ecological environment monitoring. Urban plantation has realistic demands for single tree management such as catkin pollution, maintenance of famous trees, landscape construction, and park management. At present, there are problems of missed detection and error detection in dense plantations and complex background plantations. This paper proposes a single tree detection method based on single shot multibox detector (SSD). Optimal SSD is obtained by adjusting feature layers, optimizing the aspect ratio of a preset box, reducing parameters and so on. The optimal SSD is applied to single tree detection and location in campuses, orchards, and economic plantations. The average accuracy based on SSD is 96.0, 92.9, and 97.6% in campus green trees, lychee plantations, and palm plantations, respectively. It is 11.3 and 37.5% higher than the latest template matching method and chan-vese (CV) model method, and is 43.1 and 54.2% higher than the traditional watershed method and local maximum method. Experimental results show that SSD has a strong potential and application advantage. This research has reference significance for the application of an object detection framework based on deep learning in agriculture and forestry.

scholarly journals The Potential for Dams to Impact Lowland Meandering River Floodplain Geomorphology

2014 ◽  
Vol 2014 ◽  
pp. 1-24 ◽  
Author(s):  
Philip M. Marren ◽  
James R. Grove ◽  
J. Angus Webb ◽  
Michael J. Stewardson
Keyword(s):  
Environmental Flows ◽  
Channel Morphology ◽  
River Channel ◽  
Future Research ◽  
Floodplain Vegetation ◽  
Meandering River ◽  
Alluvial Sediment ◽  
Floodplain Development ◽  
River Channel Morphology ◽  
Active Processes

The majority of the world's floodplains are dammed. Although some implications of dams for riverine ecology and for river channel morphology are well understood, there is less research on the impacts of dams on floodplain geomorphology. We review studies from dammed and undammed rivers and include influences on vertical and lateral accretion, meander migration and cutoff formation, avulsion, and interactions with floodplain vegetation. The results are synthesized into a conceptual model of the effects of dams on the major geomorphic influences on floodplain development. This model is used to assess the likely consequences of eight dam and flow regulation scenarios for floodplain geomorphology. Sediment starvation downstream of dams has perhaps the greatest potential to impact on floodplain development. Such effects will persist further downstream where tributary sediment inputs are relatively low and there is minimal buffering by alluvial sediment stores. We can identify several ways in which floodplains might potentially be affected by dams, with varying degrees of confidence, including a distinction between passive impacts (floodplain disconnection) and active impacts (changes in geomorphological processes and functioning). These active processes are likely to have more serious implications for floodplain function and emphasize both the need for future research and the need for an “environmental sediment regime” to operate alongside environmental flows.

scholarly journals THE BENEFITS OF RIVER INDICATORS TO ASSESS THE ECOLOGICAL STATUS OF IIUM CAMPUS

2017 ◽  
Vol 15 (1) ◽  
Author(s):  
Nor Zalina Harun ◽  
Mazlina Mansor ◽  
Safiah Abu Noh
Keyword(s):  
Environmental Impacts ◽  
Anthropogenic Activities ◽  
Ecological Status ◽  
Structured Interview ◽  
Channel Morphology ◽  
River Channel ◽  
Physical Planning ◽  
Natural Ecosystem ◽  
River Channel Morphology ◽  
Ecologically Sustainable

The concept of sustainable campus has emerged from the social, economic and environmental impacts due to anthropogenic activities around the world. One of the initiatives of sustainable campus is the application of ecological indicators. The indicators provide information about the current condition and early warning on the possible risks of environmental impacts to the campus environment. However, lack of understanding on the values of natural ecosystem in campusand the lack of proper planning has led to the depletion of natural ecosystem. The study seeks to examine river degradation in IIUM campus and to explore the benefits of river indicators towards achieving IIUM as an ecologically sustainable campus. Data were gathered using a qualitative approach involving three methods of data collection namely: (i) document analysis, (ii) semi-structured interview and (iii) site inventory. The finding reveals that the application of river channel morphology indicators is an important basis for physical planning in making a campus ecologically sustainable. Further analysis suggests that the suitable indicators to assess the condition of IIUM River are the river channel morphology indicators such as width, depth, channel pattern and slope ratio. The process of selecting the indicators are carried out based on six criteria of good indicators discussed in this study. The study concluded that the application of river channelmorphology indicators is a critical process in physical planning of a sustainable campus as it contributes in preventing the loss of natural ecosystem and it offers a credible basis for creating a conducive place for campus residents.

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