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New Methodological Approaches for Change in Traditional Sectors: The Case of the West Java Fisheries Socio Economic System

100%
Rizal A., Nurruhwati I.
World News of Natural Sciences
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2019
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vol. 22
41-51
EN
This paper summarises the methodological approach and main results of the Coastal project (Employment and Human Resources in the Fisheries Socio-Economic System). This project had as its main aim the search for alternative futures for the fisheries sector in West Java, with particular attention being paid to the human resources situation and the working and living conditions of the fisheries-dependent populations in the coastal areas. This is a particularly interesting case, since fisheries were once an important activity and they are now in deep recession, even though it is generally recognised that the future utilisation of maritime resources offer an immense potential. As part of the research, a Delphi exercise was implemented involving in two successive stages some of the leading actors and experts dealing with the sector in West Java. Other initiatives were held in the context of the Coastal project providing direct and indirect inputs to the scenarios and recommendations that were put forward in the sequence of the Delphi exercise. Overall, the activities described in the paper contribute to the mobilisation of major actors and to discussions that may have practical implication for the future of the sector - if certain conditions are now met in the follow up to the project.
2
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Spatial Modeling of Coastline Change for Two Decades (1994-2014) in Pangandaran, West Java - Indonesia

81%
Harahap S. A., Nurruhwati I., Purba N. P., Gamma M.
World News of Natural Sciences
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2022
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vol. 41
1078-122
EN
Coastal areas are very vulnerable to various pressures, developments, and changes. In the last three decades, due to the process of abrasion and accretion, there have been changes in coastlines in various coastal areas in Indonesia. Coastal abrasion and accretion are major concerns in coastal management. Morphological changes have had a major impact on land use and the socio-economic development of communities in coastal areas. In connection with this issue, it is necessary to conduct a study that aims to determine the rate and location of coastline changes in Pangandaran Regency. Considering that Pangandaran Regency is one of the southern regions of Java which is directly facing the Indian Ocean it has high coastal dynamics. In addition, Pangandaran beach is a beach tourism destination that is quite well known and has the potential to be developed, but in some locations, there are indications of a significant decline in the coastline. In this study, Landsat satellite images in time series (1994-2014) were analyzed using remote sensing technology and GIS approaches. Analysis of coastline change was carried out using the DSAS program. The results of the study show that the coastline change in Pangandran is dominated by abrasion at a rate of about -2.5 to -0.1 meters/year. The rate of change of the Pangandaran coastline which experienced the highest abrasion was -4.7 meters/year and the lowest was -0.1 meters/year, while the highest accretion rate was 40.1 meters/year and the lowest was 0.1 meters/year. Maximum abrasion is located at Sukaresik village (Sidamulih Sub-district) at the mouth of the Karang Tirta River. The minimum abrasion is located at Pananjung village. Meanwhile, accretion occurred in several villages such as Pananjung Village, Wonoharjo Village (Pangandaran Sub-district), Balogo Village (Kalipucang Sub-district), Kerta Mukti Village (Cimerak Sub-district), and Cikambulan Village (Sidamulih Sub-district). Minimum accretion is located at Pananjung village and maximum accretion is located at Bagolo village near the estuary of Citanduy River.
3
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Structure of Plankton Communities in Cijulang River Pangandaran District, West Java Province, Indonesia

81%
Sahidin A., Nurruhwati I., Riyantini I., Triandi M.
World News of Natural Sciences
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2019
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vol. 23
128-141
EN
A river is a water ecosystem that plays an important role in the hydrological cycle and functions as a catchment area for the surrounding area. One of the organisms inhabiting river waters is plankton. The purpose of this study was to determine and analyze the structure of the plankton community in the waters of the Cijulang River and to study the relationship between plankton abundance, as well as some physical-chemical parameters of the water. The study was conducted in January, February, and March 2018 on the Cijulang River, at 5 (five) stations with a purposive sampling method. Accordingly, 17 genera were found, from 7 phytoplankton classes consisting of 6 Bacillariophyceae genera, 1 Clorophyceae genera, 2 Cyanophyceae genera, 3 Zygnematophyceae genera, 2 Desmidiaceae genera, 1 Synurophyceae genera, and 2 Fragillariophyceae genera. Also found were 10 genera from 5 classes of zooplankton consisting of 4 genera Maxillopoda, 2 genera Branchiopoda, 1 genera Gastropoda on veliger fase, 1 genera Ostracoda, and 2 genera Copepoda. The abundance of phytoplankton obtained ranges from 11-57 cells / L, while the zooplankton ranges from 8 – 40 ind/L. The diversity index (H ') = 1.397 - 2.275 and dominance index (D) = 0.022 - 0.294. Physical-chemical parameters of the waters, respectively, were 22 °C - 31 °C, light intensity 47.5 cm - 254 cm, salinity 0 ppt - 20 ppt, and dissolved oxygen 6.2 mg / L - 13.4 mg / L. Ammonia concentration 0.03 - 0.08 mg / L. All stations had a phosphate value of less than 0.16 mg / L and a silicate concentration of 0.01 - 0.0581 mg / L.
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