scholarly journals Nutrient distribution models and flow patterns in Coastal Waters and Small Islands, Tanjungpinang City, Indonesia

Author(s):  
Febrianti Lestari

Research has been done on the model of nutrient distribution and current pattern in coastal water of Tanjungpinang City. The research objective was to develop a model of nutrient distribution and current patterns in coastal waters and small islands as an effort to manage the eutofication of coastal waters and small islands in the archipelago. Determining the location of the observations was done by purposive sampling at high tide and low tide at several predetermined research stations. The results showed the nutrient distribution model in the waters of Tanjungpinang Bay, a different distribution pattern compared to the waters of the Dompak Strait, with the distribution of nutrients from the yield model at low tide and at high tide shows the same pattern, which tends to decrease offshore and high in some coastal locations. around the waters of the Sei. Carang estuary which is connected to the waters of Tanjungpinang Bay. The pattern of currents during the highest tide is bandage and full moon in coastal waters and small islands in the area of Tanjungpinang City, which shows that the inlet flows from the west of the waters, then exits towards the north into open water. However, part of the water mass in the presence of small islands around it becomes fragmented causing a turn to the south of the coastal waters of the city of Tanjungpinang, with a maximum current speed of 1.1 m/s.

Fisheries ◽  
2021 ◽  
Vol 2021 (6) ◽  
pp. 58-62
Author(s):  
Kamil Bekyashev

The article gives a brief description of the various species of seals. In the city of Arkhangelsk there is a monument to a seal. Two species of seals live in the coastal waters of Russia: the Steinger seal and the European seal. They are listed in the Red Book. The article analyzes the conventions and agreements on the protection of seals: Convention for the Conservation of Antarctic Seals 1972, the Agreement on the cooperation in research, conservation and management of marine mammals in the North Atlantic 1992, the Agreement between the Government of the USSR and the Government of Norway on Measures to regulate fishing, sealing and protection of seal stocks in the Northeast Atlantic 1957. The decisions of the 51st session of the Joint Norwegian–Russian Fisheries Commission are analyzed. The article ends with an outline of the contribution of the Russian Federation to the rational seal fishery.


GANEC SWARA ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 521
Author(s):  
ZAENAL ARIFIN ◽  
ADHI PUTRA SATRIA

This article aims to explain how the development of coastal waters and small islands management problems in Indonesia after the issue of Law No. 1 of 2014 and Law No. 23 of 2014, this paper uses normative juridical approach, where normative juridical research is research which uses primary data as main data in research. The results show that the development of management of coastal waters and small islands in Indonesia experience changes, especially when the issue of Law No. 1 of 2014 and Law No. 23 of 2014, these changes brought a new problem which include the loss of regional authority over management coastal waters, small islands, overlapping arrangements regarding Spatial Planning and Zoning Plans for Coastal Areas and Small Islands (RZWPPK), and Management and Utilization of marine resources is possible to be managed by foreign parties. So that the conclusions obtained is there is need to redesign the role of the city regional government in the management of coastal waters and small islands, removing the obligation of the local government to determine Spatial Planning and Zoning Plans for Coastal and Small Islands (RZWPPK) and protect and empower coastal communities in the management of coastal waters and small islands.


Antiquity ◽  
1976 ◽  
Vol 50 (200) ◽  
pp. 216-222
Author(s):  
Beatrice De Cardi

Ras a1 Khaimah is the most northerly of the seven states comprising the United Arab Emirates and its Ruler, H. H. Sheikh Saqr bin Mohammad al-Qasimi, is keenly interested in the history of the state and its people. Survey carried out there jointly with Dr D. B. Doe in 1968 had focused attention on the site of JuIfar which lies just north of the present town of Ras a1 Khaimah (de Cardi, 1971, 230-2). Julfar was in existence in Abbasid times and its importance as an entrep6t during the sixteenth and seventeenth centuries-the Portuguese Period-is reflected by the quantity and variety of imported wares to be found among the ruins of the city. Most of the sites discovered during the survey dated from that period but a group of cairns near Ghalilah and some long gabled graves in the Shimal area to the north-east of the date-groves behind Ras a1 Khaimah (map, FIG. I) clearly represented a more distant past.


Author(s):  
Sergey B. Kuklev ◽  
Vladimir A. Silkin ◽  
Valeriy K. Chasovnikov ◽  
Andrey G. Zatsepin ◽  
Larisa A. Pautova ◽  
...  

On June 7, 2018, a sub-mesoscale anticyclonic eddy induced by the wind (north-east) was registered on the shelf in the area of the city of Gelendzhik. With the help of field multidisciplinary expedition ship surveys, it was shown that this eddy exists in the layer above the seasonal thermocline. At the periphery of the eddy weak variability of hydrochemical parameters and quantitative indicators of phytoplankton were recorded. The result of the formation of such eddy structure was a shift in the structure of phytoplankton – the annual observed coccolithophores bloom was not registered.


2020 ◽  
Vol 8 (2) ◽  
pp. 13
Author(s):  
Ankita Pandey

Guwahati derives its name from the Assamese word “Guwa” means areca nut and “Haat” means market. However, the modern Guwahati had been known as the ancient Pragjyotishpura and was the capital of Assam under the Kamrupa kingdom. A beautiful city Guwahati is situated on the south bank of the river Bramhaputra. Moreover, It is known as the largest city in the Indian state of Assam and also the largest metropolis in North East India. It has also its importance as the gateway to the North- East India. Assamese and English are the spoken languages in Guwahati.  In 1667, the Mogul forces were defeated in the battle by the Ahom forces commanded by Lachut Barphukan. Thus, in a sense Guwahati became the bone of contention among the Ahoms, Kochas and the Moguls during the medieval period.  Guwahati the administrative headquarters of Lower Assam with a viceroy or Barbhukan was made by the Ahom king.  Since 1972 it has been the capital of Assam. The present paper will discuss the changes happened in Guwahati over the period of late 1970s till the present time. It will focus on the behavior of people, transformed temples, Panbazar of the city, river bank of Bramhaputra, old Fancy Bazaar, chaotic ways, festivals and seasons including a fifth man made season etc. It will also deal how over the years a city endowed with nature’s gifts and scenic views, has been changing as “a dirty city”. Furthermore, it will also present the insurgencies that have barged into the city. The occurrence of changes will be discussed through the perspective and point of view of Srutimala Duara as presented in her book Mindprints of Guwahati.


Diversity ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 170
Author(s):  
Gladys N. Benitez ◽  
Glenn D. Aguilar ◽  
Dan Blanchon

The spatial distribution of corticolous lichens on the iconic New Zealand pōhutukawa (Metrosideros excelsa) tree was investigated from a survey of urban parks and forests across the city of Auckland in the North Island of New Zealand. Lichens were identified from ten randomly selected trees at 20 sampling sites, with 10 sites classified as coastal and another 10 as inland sites. Lichen data were correlated with distance from sea, distance from major roads, distance from native forests, mean tree DBH (diameter at breast height) and the seven-year average of measured NO2 over the area. A total of 33 lichen species were found with coastal sites harboring significantly higher average lichen species per tree as well as higher site species richness. We found mild hotspots in two sites for average lichen species per tree and another two separate sites for species richness, with all hotspots at the coast. A positive correlation between lichen species richness and DBH was found. Sites in coastal locations were more similar to each other in terms of lichen community composition than they were to adjacent inland sites and some species were only found at coastal sites. The average number of lichen species per tree was negatively correlated with distance from the coast, suggesting that the characteristic lichen flora found on pōhutukawa may be reliant on coastal microclimates. There were no correlations with distance from major roads, and a slight positive correlation between NO2 levels and average lichen species per tree.


2021 ◽  
Vol 13 (8) ◽  
pp. 1495
Author(s):  
Jehyeok Rew ◽  
Yongjang Cho ◽  
Eenjun Hwang

Species distribution models have been used for various purposes, such as conserving species, discovering potential habitats, and obtaining evolutionary insights by predicting species occurrence. Many statistical and machine-learning-based approaches have been proposed to construct effective species distribution models, but with limited success due to spatial biases in presences and imbalanced presence-absences. We propose a novel species distribution model to address these problems based on bootstrap aggregating (bagging) ensembles of deep neural networks (DNNs). We first generate bootstraps considering presence-absence data on spatial balance to alleviate the bias problem. Then we construct DNNs using environmental data from presence and absence locations, and finally combine these into an ensemble model using three voting methods to improve prediction accuracy. Extensive experiments verified the proposed model’s effectiveness for species in South Korea using crowdsourced observations that have spatial biases. The proposed model achieved more accurate and robust prediction results than the current best practice models.


2021 ◽  
Vol 13 (2) ◽  
pp. 826
Author(s):  
Meiling Zhou ◽  
Xiuli Feng ◽  
Kaikai Liu ◽  
Chi Zhang ◽  
Lijian Xie ◽  
...  

Influenced by climate change, extreme weather events occur frequently, and bring huge impacts to urban areas, including urban waterlogging. Conducting risk assessments of urban waterlogging is a critical step to diagnose problems, improve infrastructure and achieve sustainable development facing extreme weathers. This study takes Ningbo, a typical coastal city in the Yangtze River Delta, as an example to conduct a risk assessment of urban waterlogging with high-resolution remote sensing images and high-precision digital elevation models to further analyze the spatial distribution characteristics of waterlogging risk. Results indicate that waterlogging risk in the city proper of Ningbo is mainly low risk, accounting for 36.9%. The higher-risk and medium-risk areas have the same proportions, accounting for 18.7%. They are followed by the lower-risk and high-risk areas, accounting for 15.5% and 9.6%, respectively. In terms of space, waterlogging risk in the city proper of Ningbo is high in the south and low in the north. The high-risk area is mainly located to the west of Jiangdong district and the middle of Haishu district. The low-risk area is mainly distributed in the north of Jiangbei district. These results are consistent with the historical situation of waterlogging in Ningbo, which prove the effectiveness of the risk assessment model and provide an important reference for the government to prevent and mitigate waterlogging. The optimized risk assessment model is also of importance for waterlogging risk assessments in coastal cities. Based on this model, the waterlogging risk of coastal cities can be quickly assessed, combining with local characteristics, which will help improve the city’s capability of responding to waterlogging disasters and reduce socio-economic loss.


1988 ◽  
Vol 19 (2) ◽  
pp. 266-291 ◽  
Author(s):  
James L. Cobban

By the beginning of the twentieth century, Semarang was a major port city and administrative centre on Java. Attainment of this position was due partly to the expansion of its hinterland during the nineteenth century. This expansion was closely related to developments in the means of transportation and the consequent ability of plantation owners to bring the products of their plantations to the port for shipment to foreign markets. By the end of the century virtually the whole economic life of central Java focused upon Semarang. The city also exercised administrative functions in the Dutch colonial administration and generally had been responsible for Dutch interests in the middle and eastern parts of the island. The importance of Semarang as an administrative centre increased after 1906. In that year the government incorporated the city as an urban municipality (stadsgemeente). In 1914 it had consular representation from the United States, Belgium, Denmark, France, Great Britain, Italy, Norway, Germany, and Thailand. Subsequently, in 1926 it became the capital of the Province of Central Java under the terms of an administrative reform fostered by the colonial government at Batavia. Status as an urban municipality meant that local officials sitting on a city council would govern the domestic affairs of the city. The members of the city council at first were appointed from Batavia, subsequently some of them were elected by residents of the city. By the beginning of the twentieth century Semarang had enhanced its position as a major port on the north coast of the island of Java. It was one of the foremost cities of the Dutch East Indies, along with Batavia and Surabaya, a leading port and a centre of administration and trade. This article outlines the growth of the port of Semarang during the nineteenth century and discusses some of the conflict related to this growth over living conditions in parts of the city during the twentieth century, a conflict which smouldered for several decades among the government, members of the city council, and the non-European residents of the city, one which remained unresolved at the end of the colonial era.


1887 ◽  
Vol 42 (251-257) ◽  
pp. 316-318

Carriacou is a small island situated about twenty miles to the north of the island of Grenada, the chief of the Windward group, and furnished an excellent site for the observation of the last solar eclipse. Most of the observers sent by the Eclipse Committee of the Royal Society to the West Indies in August of last year remained at Grenada, or on the small islands in its immediate vicinity, whilst Mr. Maunder and myself occupied the more distant northern station, where the totality was slightly diminished in duration. The work proposed for Mr. Maunder was to secure a series of photographs of the corona, with exposures of 40s. and under, and also to obtain two photographs of the spectrum of the corona with the longest exposures possible.


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