scholarly journals Analysis of Sedimentation as Implications of Beach Accretion using Spatial Analysis in the Coastal Area of Banyuasin South Sumatra, Indonesia

2021 ◽  
Vol 10 (2) ◽  
pp. 244-254
Author(s):  
Yulifa Handayani ◽  
Robiyanto H Soesanto ◽  
Fauziyah Fauziyah ◽  
Eddy Ibrahim ◽  
Muhammad Hendri ◽  
...  
Keyword(s):  
Coastal Area ◽  
Landsat Imagery ◽  
Sediment Traps ◽  
Dominant Factor ◽  
Land Conversion ◽  
Mangrove Forests ◽  
Factors Influencing ◽  
High Sedimentation ◽  
Sediment Data ◽  
Interpretation Method

This study was conducted in the coastal area of ​​Banyuasin (CAB) which was considered to have a variety of sedimentation classes originating from fluvial and marine processes. The study aimed to observe/determine changes in the morphology of coastal areas related to sedimentation in the CAB and to make maps related to oceanographic parameters, changes in the land cover and identification of the distribution of sedimentation occurring in the CAB, and the dominant factors influencing the change. This study used imagery interpretation method and the sediment data collection used sediment traps to determine the occurrence of accretion and abrasion. The results of the study showed that there was a change in the environment based on the analysis of Landsat imagery, that have undergone changes are Ekor Tikus island (PET), Tg Api-api (TAA), and the Bungin River (SB), which are affected by the land conversion, sedimentation, and tidal currents. There has been an environmental change in the CAB, especially at the Banyuasin estuary (PET) with a high sedimentation rate. The changes also occurred in TAA and SB, with the dominant factor being the decline in mangrove forests. As a result, it is necessary to conduct a more detailed study and time series related to mangroves.

scholarly journals The solutions for construction of sea dike and sea embankments system as the sandy mud trap to support mangrove plants in the coastal zone of Hai Phong city, Vietnam

2021 ◽  
Vol 21 (3) ◽  
pp. 341-352
Author(s):  
Doan Thai Vu ◽  
Van Nam Thai
Keyword(s):  
Ecological Impact ◽  
Coastal Region ◽  
Practical Experience ◽  
Sediment Traps ◽  
Mangrove Forests ◽  
Complex Dynamic ◽  
Mangrove Plants ◽  
Favorable Conditions ◽  
Mangrove Trees ◽  
Sea Dike

Mangrove plants play a viral role in protecting the coast, retraining erosion. Especially in areas considered the variable wave conditions, complex dynamic conditions such as the coastal region of Hai Phong city. However, due to various reasons, the development/additional planting of mangrove forests in the coastal area of Hai Phong in some locations has not achieved the desired result. This study was conducted survey measurements of mangroves, terrain, and practical experience to assess the ecological impact of certain dynamic and sedimentary conditions on mangroves. Thereby proposing several solutions to build sea dykes/embankments suitable to Hai Phong conditions, strengthen sediment traps, and create favorable conditions for developing mangrove trees in this area.

scholarly journals Quantitative Assessment and Driving Force Analysis of Mangrove Forest Changes in China from 1985 to 2018 by Integrating Optical and Radar Imagery

2020 ◽  
Vol 9 (9) ◽  
pp. 513
Author(s):  
Yuhan Zheng ◽  
Wataru Takeuchi
Keyword(s):  
Socioeconomic Development ◽  
Driving Forces ◽  
Landsat Imagery ◽  
Mangrove Forests ◽  
Array Type ◽  
Novel Approach ◽  
Radar Imagery ◽  
Mangrove Dynamics ◽  
Driving Force Analysis

Mangrove ecosystems are valuable, yet vulnerable, and therefore they have been an important subject of protection and restoration in China. Reliable information on long-term China mangrove dynamics is lacking but vital to analyze the driving forces and evaluate the efforts of mangrove conversation. This study aims to quantify the conversions among mangroves and other land covers with high accuracy. The updated mangrove base map for 2018 was produced by integrating Advanced Land Observing Satellite (ALOS) Phased Array type L-band Synthetic Aperture Radar 2 (PALSAR-2) yearly mosaics and Landsat imagery with an overall accuracy of 95.23 ± 6.02%. Then, a novel approach combining map-to-image and image-to-image methods was proposed to detect the changed pixels in mangrove forests from 1985 to 2018. The mangrove base map was adopted to mask the images from other years. To determine the changed pixels, the differencing values in the masked area between two images were calculated and compared with the corresponding thresholds. Based on the changed pixels, the possible driving forces were analyzed and associated with socioeconomic development. The resultant mangrove dynamics demonstrated that mangrove forests in China experienced a tendency of loss first and recovery later during the past 30 years. Most mangrove gains came from aquaculture and mudflat, whilst losses were due to the built-up construction and aquaculture reclamation. These conversions indicated that mangrove deforestations were mainly due to human-induced destruction, while the recoveries were strongly associated with conservation and restoration actions.

National-scale mangrove forest mapping by using Sentinel-1 SAR and Sentinel-2 MSI imagery on the Google Earth Engine Platform

2020 ◽  
Author(s):  
Luojia Hu ◽  
Wei Yao ◽  
Zhitong Yu ◽  
Lei Wang
Keyword(s):  
Spatial Resolution ◽  
Mangrove Forest ◽  
Large Scale ◽  
Landsat Imagery ◽  
Google Earth ◽  
Accuracy Evaluation ◽  
Mangrove Forests ◽  
Forest Mapping ◽  
Google Earth Engine ◽  
Sentinel 2

<p>Mangrove forest is considered as one of the pivotal ecosystems to near-shore environment health, adjacent terrestrial ecosystems and even global climate change migration. However, for past two decades, they are declining rapidly. In order to take effective steps to prevent the extinction of mangroves, high spatial resolution information of large-scale mangrove distribution is urgent. Recent study has indicated that a suitable pixel size for extracting mangroves should be at least equal to 10 m. Hence, Sentinel imagery (Sentinel-1 C-band synthetic aperture radar (SAR) and Sentinel-2 Multi-Spectral Instrument (MSI) imagery) whose spatial resolution is 10 m may hold great potentials to achieve this goal, but there are limited researches investigating it. Therefore, in this study, we will explore the potential of Sentinel imagery to extract mangrove forests in China on the Google Earth Engine platform. Specifically, our study was mainly conducted around 3 questions: (1) Which Sentinel imagery provides a higher accuracy for mangrove forest mapping, Sentinel-1 SAR data or Sentinel-2 multi-spectral data? (2) which combination of features from Sentinel imagery provides the most accurate mangrove forest map? (3) Compared to 30-m resolution mangrove products derived from Landsat imagery, how does 10-m resolution map improve our knowledge about the distribution of mangrove forest in China?</p><p> </p><p>Our results show that: (1) The highest producer’s accuracies (the reason why using producer’s accuracy as an accuracy evaluation indicator here is that the omission errors in mangrove forest extent map are much larger than commission errors) of mangrove forest maps derived from Sentinel-1 and Sentinel-2 imagery are 91.76% and 90.39%, respectively, which means that the contributions of Sentinel-1 SAR and Sentinel-2 MSI imagery to mangrove mapping are similar; (2) The highest producer’s accuracy of mangrove forest map at 10-m resolution is 95.4%. The mangrove forest map with the highest accuracy is obtained by combining quantiles of spectral and backscatter bands, spectral index, and texture index derived from time series of Sentinel-1 and Sentinel-2 imagery, indicating that the combination of Sentinel-1 SAR and Sentinel-2 MSI imagery is more useful in mangrove forest mapping than using them separately; (3) In China, the total area of mangrove forest extent at 10-m resolution is similar to that at 30-m resolution (20003 ha vs. 19220 ha). However, compared to 30-m resolution mangrove products, the 10-m resolution mangrove map identifies 1741 ha (occupying 8.7% of total mangrove forest area in China) mangrove forests in size smaller than 1 ha, which are especially important to low-lying coastal zone. This study demonstrates the feasibility of Sentinel imagery in large-scale mangrove forest mapping and gives guidance to map global mangrove forest at 10-m resolution in the future.  </p><p> </p>

Analysis of Land use and Land Cover Changes in the Coastal Area of Bangladesh using Landsat Imagery

2015 ◽  
Vol 27 (4) ◽  
pp. 899-909 ◽  
Author(s):  
M. Rafiqul Islam ◽  
M. Giashuddin Miah ◽  
Yoshio Inoue
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Coastal Area ◽  
Landsat Imagery ◽  
Land Cover Changes

Analysis of slope stability at Goonyella Mine

1981 ◽  
Vol 18 (2) ◽  
pp. 179-194 ◽  
Author(s):  
B. G. Richards ◽  
M. A. Coulthard ◽  
C. T. Toh
Keyword(s):  
Shear Strength ◽  
Numerical Methods ◽  
Coal Mine ◽  
Stress Relief ◽  
Dominant Factor ◽  
Remedial Measures ◽  
Laboratory Studies ◽  
Planar Surfaces ◽  
Factors Influencing ◽  
Significant Factors

Since the commencement of mining at the strip coal mine at Goonyella, Queensland, Australia, serious stability problems have been experienced in both the spoil piles and the highwalls. A collaborative investigation was commenced in 1974 and the significant factors influencing stability have now been defined. This paper outlines the results of field and laboratory studies associated with the investigation and describes the various numerical methods used to analyse stability. The main conclusions, which are similar for both the spoil piles and the highwalls, are that the failures generally occur along two or three planar surfaces; that the shear strength in the basal areas is controlled by the sensitivity of the materials to moisture and shear strain prior to failure; and that tensile cracking due to stress relief and blasting is the dominant factor in the upper or escarpment areas. Possible control and remedial measures are discussed briefly.

scholarly journals MONITORING EROSION AND ACCRETION SITUATION IN THE COASTAL ZONE AT KIEN GIANG PROVINCE

2018 ◽  
Vol XLII-3/W4 ◽  
pp. 197-203
Author(s):  
N. T. H. Diep ◽  
N. T. Loi ◽  
N. T. Can
Keyword(s):  
Land Use ◽  
Coastal Area ◽  
Coastal Erosion ◽  
Landsat Imagery ◽  
Mekong Delta ◽  
The West ◽  
Shoreline Changes ◽  
Water Index ◽  
Normalized Difference Water Index ◽  
Erosion And Accretion

<p><strong>Abstract.</strong> Kien Giang is one of the coastal provinces in the Mekong Delta which is facing the problem of coastal erosion to affect people’s life in the coastal area. This project aims to monitor shoreline and to assess landslide and accretion situation in the period from 1975 to 2015 in the coastal area of Kien Giang province. The study applied Normalized Difference Water Index (MNWI) method and water level extraction using LANDSAT imagery from 1975 to 2015 for highlight the shoreline. Thus, analysis was identified erosion and accretion areas based on shoreline changes and land use influenced by landslides and deposition. The results show to create shoreline changes from 1997 to 2015 in the coastal area of Kien Giang province. A landslide occurred in the west from Nguyen Viet Khai commune to Thuan Hoa commune and Nam Yen commune to Vinh Hoa Hiep commune, Rach Gia city, Kien Giang province. An accretion situation was determined in the areas from Thuan Hoa commune, An Minh district to Nam Thai commune, An Bien district, Kien Giang province, Rach Gia sea encroachment at Rach Gia town and Ha Tien encroachment area at Ha Tien town, Kien Giang province. In general, the coastal area of Kien Giang province has a predominant tendency of accretion, however, the occurrence of erosion and accretion are happened interlacing in the coastal area at Kien Giang province.</p>

scholarly journals Fikih Mangrove: Formulasi Fikih Lingkungan Pesisir Perspektif Eko-Syariah

2017 ◽  
Vol 7 (1) ◽  
pp. 107-127
Author(s):  
Moh. Mufid
Keyword(s):  
Coastal Area ◽  
Local Governments ◽  
Coastal Environment ◽  
Coastal Areas ◽  
Coastal Communities ◽  
Religious Values ◽  
Land Conversion ◽  
Comprehensive Understanding ◽  
New Paradigm ◽  
Islamic Jurisprudence

Abstract: This article is a study of mangrove management in eco-sharia perspective. Conservation efforts in the coastal areas must be constructed based on religious values ​​so that it is expected to create a collective attitude of environmental awareness among coastal communities. Eco-sharia as an approach can provide a new paradigm related to the preservation of the coastal environment with anthropo-cosmic insights. The concept of eco-ecology and ecosystem can also provide a comprehensive understanding in the effort to support the existence of coastal environment jurisprudence. Normatively, the perspective of Islamic jurisprudence on mangroves preservation can be built through an in-depth understanding of Islamic recommendations in rehabilitating mangrove habitats in coastal area; Procedure of mangrove land conversion based on consideration of principle of benefit; Thus, it is urged that local governments to issue regulations to manage mangrove preservation in a sustainable manner. Abstrak: Artikel ini merupakan kajian pengelolaan mangrove dalam perspektif eko-syariah. Upaya pelestarian di wilayah pesisir harus dikonstruksi berbasis nilai-nilai religius sehingga diharapkan mampu melahirkan sikap kesadaran lingkungan secara kolektif di kalangan masyarakat pesisir. Eko-syariah sebagai suatu pendekatan dapat memberikan paradigma baru terkait pelestarian lingkungan pesisir dengan wawasan antropokosmis. Konsep ekoteologi dan ekosofi juga dapat memberikan pemahaman yang komprehensif dalam upaya mendukung eksistensi fikih lingkungan pesisir. Secara normatif, fikih mangrove dapat dibangun melalui pemahaman secara mendalam tentang anjuran Islam dalam merehabilitasi habitat mangrove di pesisir; prosedur alih fungsi lahan mangrove berdasarkan pertimbangan asas manfaat-mafsadat; keniscayaan pemerintah daerah menerbitkan regulasi untuk mengatur pengelolaan mangrove secara berkelanjutan.

Hydrological and Sediment Characteristics of Sand Ridge Field in Jiangsu Coastal Area of China

2013 ◽  
Vol 850-851 ◽  
pp. 1347-1350
Author(s):  
Cheng Chen ◽  
Yi Gang Wang ◽  
Hui Ming Huang ◽  
Da Ke Chen ◽  
Chun Guang Yuan
Keyword(s):  
Grain Size ◽  
Coastal Area ◽  
Sediment Concentration ◽  
Water Area ◽  
Sand Ridge ◽  
Sediment Grain Size ◽  
Sand Ridges ◽  
Surrounding Areas ◽  
Sediment Data ◽  
Port Construction

The sand ridges field in Jiangsu coastal area has been the key region of tidal flat reclamation, waterway regulation and port construction. Adopting the hydrological and sediment data in winter, the tidal patterns were revealed. In addition, the depth-averaged velocity, sediment grain size and sediment concentration in each station were analyzed and compared in detail. The result shows that the tidal in study area is regular semidiurnal and diurnal inequality. The velocity has a decreasing tendency with the Tiaozini water area being centered towards the surrounding areas. The grain size gradually decreases and then increases from north to south, while the sediment concentration gradually increases and then decreases from north to south.

The Determinant Factors of Foreign Tourists’ Visit to Tourism Destination in North Sumatra

2019 ◽  
Vol 10 (1) ◽  
pp. 266
Author(s):  
Maria Magdalena BATE’E ◽  
Syah Abadi MENDROFA ◽  
Yamolala ZEGA ◽  
Syukur Kasieli HULU ◽  
LELYSO LELYSO ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Linear Regression ◽  
Multiple Linear Regression ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Negative Influence ◽  
Dominant Factor ◽  
Tourism Destination ◽  
Factors Influencing ◽  
North Sumatra

This research aims to investigate the factors influencing the rate of foreign tourists’ visit to tourism destination in North Sumatra, Indonesia. The data were collected using observation, interview, documentation study and questionnaires. The data were analysed using multiple linear regression analysis. The findings of the study indicated that the ancillary facilities are the dominant factor influencing tourists’ visit to tourism destination in North Sumatera. The factors of service quality and facilities and infrastructures provide negative influence on tourists’ visit to tourism destination.

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