Journal of Coastal Conservation最新文献

Abstract

Marine debris now considered a global concern, is any solid created by human activity that is either purposely or mistakenly thrown into the coastal environment, directly or indirectly. The presence of marine debris may have a wide range of detrimental effects on coastal ecosystems and the environment, including in the Kulon Progo coastal area of Yogyakarta. Unfortunately, no research on marine debris has been conducted in Kulon Progo Regency so far. As a result, the purpose of this study is to define the marine debris characteristics in Yogyakarta’s Kulon Progo coastal area, as well as to analyze tidal influences on marine debris in the study area. Tidal data were obtained from the Tidal Station Data Information System and the Indonesian Geospatial Reference System, Geospatial Information Agency (BIG). Admiralty methods were used to identify the tidal type based on the 29 days of data every 1 h during the last year. Marine debris samples were collected using the transect and simple random sampling method for each beach during different tide conditions. Furthermore, the statistical method of one-way ANOVA was used to obtain the relationship between tidal and marine debris data. The results show that the Congot and Pasir Kadilangu Beaches tides are a mixed tide prevailing semi-diurnal type (1.50 ≥ F > 0.25). Compared to Pasir Kadilangu Beach, Congot Beach has more macro- and meso-sized marine debris during low and high tides, where plastic debris dominates both beaches. In more detail, during the high tide, the mass and amount of marine debris is more significant than during the low tide on both beaches. This phenomenon is supported by the statistical results with a P-value < 0.05. It means that tidal fluctuations and characteristics of marine debris have a substantial connection.

Preserving the quality of water resources requires researching and identifying areas susceptible to potential aquifer contamination. Therefore, the protection of these resources is paramount. This work falls within this thematic area. The main objective of this study is to identify areas at potential risk of marine intrusion and assess the Water Quality Index (WQI) in the Djedjen plain. To achieve this goal, our choice was to combine the GALDIT model based on six criteria and the Water Quality Index (WQI) based on seven parameters (Na⁺, Mg²⁺, Ca²⁺, SO₄²⁻, Cl⁻, HCO₃⁻, and EC). We utilized Geographic Information System (GIS) for this purpose. The analytical results have shown that 11% of the study area's surface is at potential risk of contamination, linked both to marine intrusion and various anthropogenic activities. Therefore, continuous monitoring of the water quality in this area is necessary.

Coastal ecosystems are diverse and provide essential global functions, supporting biodiversity conservation, economic growth, and human welfare. However, they are under threat from human activities such as overexploitation, coastal degradation, and anthropogenic impacts. The present study aimed to explore the level of public awareness and understanding of coastal ecosystems in four coastal cities in the Northern Province of Sri Lanka namely Jaffna, Kilinochchi, Mullaitivu, and Mannar. A three-part questionnaire survey was administered to respondents (n = 641) chosen using a systematic sampling method across four coastal cities in the North from April to November 2022. A key highlight from the study is that approximately 75% of the respondents demonstrated significant awareness and knowledge regarding the degradation of the coastal ecosystem in their respective local areas and 81% reported observing an increase in the trend. The influence of social media for awareness was found in nearly half of the respondents followed by mass media (21%). Encouragingly, there is a positive trend among the respondents in recognizing the roles and responsibilities of the government and local community (58%) in addressing coastal ecosystem degradation and promoting conservation efforts. Overall, respondents from Jaffna and Mannar demonstrated a comparatively higher awareness of coastal ecosystems and their degradation than those from Kilinochchi and Mullaitivu. Given their role as transitional zones between terrestrial and marine environments, their intricate socio-ecological dynamics, and the requirement for integrated planning and management strategies, it becomes evident that gaining insight into the level of public awareness of coastal ecosystems is of utmost importance.

Research is carried out at the coast of Chennai City, Tamil Nadu, India. Beaches are among the most well-liked tourist attractions since they offer the ideal relaxing environment. In actuality, coastal regions account for 80% of all tourism. The study’s goal is to ascertain if coastal areas are suitably suited for the long-term growth of beach tourism in the area’s recreation category. Eight parameters have been prepared with the aid of remote sensing and geographic information systems (GIS) to assess the suitability of the sustainable development of the coast area for beach tourism using the integrated AHP-TOPSIS model. These parameters include land utilization, erosion, accretion, beach type, beach width, bus stop proximity, train station, and suspended sediment load. Results reveal that Tourism suitability is high in Sector B, followed by Sectors C and A. In sector B, most coastal locations have low suitability scores due to the presence of the harbor, whereas an equal number of coastal locations have high suitability scores. Sector A’s highest and lowest values are 93.33 and 40.00, respectively. The highest and lowest values of the tourism suitability index in sector B are 95.55 and 36.20, respectively. The highest and lowest values in Sector C are 88.14 and 57.77, respectively.

The use of ‘Citizen Science’ in marine fisheries research has facilitated public participation in natural resource management, resource conservation, environmental preservation, and decision-making worldwide. The potential of a ‘Marine Citizen Science’ platform, incorporating expertise and data provided by innovative, well-trained commercial fisherman organizations, rekindles a feasible opportunity for academics to monitor the fishery with low financial investment. The current study demonstrates the value of combining geo-tagged ‘Citizen Science data’ on the Solenocera choprai fishery with traditional landing data to illustrate its significant potential for obtaining extensive spatial information on the resource. Growth data derived from the traditional von Bertalanffy growth function (VBGF) were compared with in situ mode shifting in the natural fishing ground, using this data for support. The current study concludes that a well-organized scientific research program that incorporates ‘Citizen Science’ data analysis can pave the way for extensive research in marine fishery resources and fishing grounds that have been put on hold due to a lack of financing.

The research aims to find out what part of human activities on the outside and inside played in the destruction of the coastal area; in this case, it examines human activities carried out by residents and sand mining entrepreneurs around the north Galesong Sea, which have an impact on change structure of land use and abrasion of coastal areas—using a quantitative paradigm with quantitative methods as the primary method and qualitative as support. The quantitative method uses a geographic approach, namely a spatial approach using a Geographic Information System in its analysis. GIS uses spatially based data, namely geographically oriented data. Data used in this study are land use maps and village shorelines. The qualitative method used descriptive case studies. Qualitative data: The population of this study is Aeng Batu village. There are two types of research samples, namely area and human samples; area samples are taken from the description of conditions when abrasion occurs and after post-abrasion repairs occur. For the human sample, the respondents were community leaders, village officials, and the community to find out the purpose of digging beach sand and dumping trash on the beach in ex-dug holes. The data is described and supplemented with photographs of actual conditions in the field—analysis techniques using analytical descriptions. In conclusion, damage to coastal land caused by human activities does not only come from mining at sea but also the activities of residents who use beach land and beach sand (for residential construction and garbage disposal), the physical shape of the beach, the damage is exacerbated by high rainfall, wind, and waves, especially during the rainy season.

Abstract

The study analyzes satellite imagery, beach morphology, grain size, river discharge and bathymetry, and tidal water level along the central Ganges-Brahmaputra-Meghna (GBM) delta coast and examines the processes of coastal development. Integrated remote sensing and geographic information system (GIS) techniques were used to monitor coastal dynamics in the GBM delta from 1978 to 2023. The analysis shows that the west and central coasts eroded about 0.03–2.40 km and lost 14.54 km² of land during the study period. In contrast, the east coast advanced 0.09–1.42 km and gained 2.80 km². Beach slopes varied with the west coast having slope between 1° and 2°, and consisting of bimodal, poorly sorted, very fine-grained sand. The central and eastern coastline have slopes between 1° and 4°, and 3° and 5°, respectively, with unimodal, well-sorted to moderately well-sorted fine-grained sand. Statistical analysis of tidal water levels shows an increasing trend (8–12 mm yr⁻¹), while river discharge decreased by 22.57–55.94% during the period November to May due to the upstream dams, and channels were silted. On the east coast, characterized by weak longshore currents, there is minimal transfer of sediment to the sea, and the coastline advanced. Conversely, the current gets stronger when it moves to the west, and the coastlines experience the erosion. The coastal development of the area was influenced by unequal sediment supply and accommodation created at the river mouth due to the sea level rise (SLR). In addition to the natural factors, anthropogenic activities have also influenced the coastal sustainability in the study area.

Coastlines are tectonically active places with an impact on physical as well as social and economic restructuring of cities. They play an essential role in the development of urban areas. Furthermore, coastal environments may offer important health benefits. They may also present numerous threats to human health and well-being time to time. With the rapid urbanization in coastal cities, the lack of urban green space and transportation problems have emerged recently, and the cities have grown towards the sea by coastal filling areas as a solution. Especially the construction of highway on the coastline in the Black Sea region of Turkey has adversely impacted relationship between the people and the sea in the city of Trabzon. In this study, initially a literature review was conducted and parameters were specified for coastline usages. A survey study was conducted with 140 individuals who actively use the coastline in the city of Trabzon, in order to specify the past and current coastline usages. The evaluation of the past and current usage shows that people want to meet the sea but feel uncomfortable with the landscape with the fillings. According to the Anova test, the unmodified form of area was chosen to ‘have a more natural landscape (5.77)’ while the modified form of area was preferred ‘to be renovated (4.12)’. This highlights the users’ longing for the past. Therefore, authorities need to address the impact of differences between parameters in depth on the usage of the area on the coastal landscape. Coastal ecology solutions should also be produced with the ecological design approaches.