Pemetaan Kerapatan Ekosistem Mangrove Menggunakan Analisis Normalized Difference Vegetation Index di Pesisir Kota Semarang

Mangrove ecosystem in Semarang City has an important role for survival of the coastal area. This is due to the function of mangroves as a barrier to coastal erosion, wave barrier, carbon producer, as a habitat for biota in coastal areas, as well as improving water quality. However, as time goes by, mangroves condition in coastal of Semarang is decreasing every year and causing coastal disasters such as coastal erosion and tidal flooding which have identically occurred on the coast of Semarang. Mangrove ecosystem area in coastal of Semarang City in 2020 is 163,250 Ha. The aim of this study is to determine the density of mangroves ecosystem from 2013 to 2022 with Landsat 8 and Sentinel 2 satellites. The method used to classify and determine the density of mangroves ecosystem is NDVI or Normalized Difference Vegetation Index. The results of analysis show that the mangrove density in 2013 was 412.889 Ha, while in 2022 it was 142.562 Ha. The density of mangroves has decreased by around 270.327 Ha (65.5%), this is due to erosion, land conversion into pond areas, and recently the construction of the Semarang-Demak sea wall. Whereas Sentinel 2 satellite is better to use because it has better image quality, details, and accuracy to show objects on the earth's surface compared to Landsat 8.   Ekosistem mangrove di Kota Semarang memiliki peran yang penting bagi keberlangsungan hidup wilayah pesisir. Hal tersebut dikarenakan fungsi mangrove sebagai penahan erosi pantai, penahan gelombang, penghasil karbon, sebagai habitat bagi biota di wilayah pesisir, serta memperbaiki kualitas air. Namun seiring perkembangan zaman, kondisi mangrove di pesisir Semarang semakin tahun kian berkurang sehingga menimbulkan bencana pesisir seperti terjadinya erosi pantai dan banjir rob yang telah identik terjadi di pesisir Semarang.  Luas ekosistem mangrove di wilayah pesisir Kota Semarang pada tahun 2020 yaitu seluas 163,250 Ha. Tujuan dari penelitian ini yaitu untuk mengetahui kerapatan ekosistem mangrove dari tahun 2013 hingga 2022 dengan citra satelit Landsat 8 dan citra Sentinel 2. Metode yang digunakan untuk mengelaskan dan mengetahui kerapatan ekosistem mangrove adalah metode NDVI atau Normalized Difference Vegetation Index. Hasil analisa menunjukkan bahwa kerapatan mangrove pada tahun 2013 seluas 412,889 Ha, sedangkan pada tahun 2022 seluas 142,562 Ha. Kerapatan mangrove mengalami penurunan sekitar 270,327 Ha (65,5%), hal tersebut disebabkan karena adanya erosi, alih fungsi lahan menjadi area tambak, serta baru-baru ini yaitu adanya pembangunan tanggul laut Semarang-Demak. Sedangkan citra satelit Sentinel 2 merupakan citra yang lebih baik digunakan karena memiliki kualitas gambar yang lebih bagus, detail, dan akurat untuk menunjukkan obyek dipermukaan bumi dibandingkan dengan citra Landsat 8

Analisis Stabilitas Lereng Boja – Darupono Sta. 10+720 Jawa Tengah Dan Usulan Penanganannya

The landslide occurred on road Boja – Darupono Sta. 10+720 created a long traffic jam and holding up economic development between Kendal and Semarang. By analyzing the slope stability by using Fellenius method, it is shown that the SF or safety factor of the slope is 1,19 for the radius of the circle ( R ) = 28,67 and 1,63 for R = 27,09. While SF on a Plaxis V.8.2 program is 1,19, so it can be concluded that the slope in critical condition because of the SF on Plaxis V.8.2 program smaller than that of 1,5 safe although the safety factor on Fellenius value is greater than the value of safe SF. The first alternative of slope reinforcement is a Bored pile, the second alternative is Geotextille with a Counter weight. Based on finite element method calculation using Plaxis V.8.2 program, reinforcement with Bored pile produce SF = 1,75 and Geotextille with a Counter weight SF = 1,5. This form these two alternatives, Bored pile reinforcement has the greatest, so can be considered as the best alternative solution

Faktor-Faktor yang Mempengaruhi Perilaku Nelayan Artisanal dalam Pemanfaatan Sumberdaya Perikanan di Pantai Utara Provinsi Jawa Barat

This study aims to estimate accurately the behavior using the Theory of Planned Behavior perspective of artisanal fishermen in Indonesi., The population of artisanal fishermen in the northern coast of West Java Province 10,404. Techniques for sampling by cluster random sampling clusters with the number of household sample of 400 artisanal fishermen. Data was collected using a questionnaire interview further processed using the program structural equation model (SEM) and LISREL 8:54. The conclusion of this study were (1) Theory of Planned Behavior perspective can be used to view the behavior intention of artisanal fishermen in the northern coast of West Java province; (2) the coefficient of determination between the attitude variables, subjective norm, perceived behavior control to variable behavior intention at 0,64. Meanwhile the influence of variables on behavior intention to behavior by 0,68 indicates that it is not fully manifested the behavior intention in accordance with the behavior of fishermen in their fishing activities, (3) that explains the study's findings about contribution of the Theory Planned Behavior perspective to the problem of coastal common resource and can contribute to the activities of co-management of fisheries in Indonesia, especially in communities in the study area on the northern coast of West Java Province

COASTLINE CHANGES ANALYSIS IN BULELENG REGENCY BY USING SATELLITE DATA

The study of monitoring and analysis of coastline changes has been widely used satellite imagery. Satellite data that is often used in monitoring studies and analysis of coastline changes are Landsat, Quickbird, Allos dan IKONOS. The aim of study is to determine an average of coastline change in Buleleng regency by using two kind satellite are SPOT 5 in 2009 has a spatial resolution of 10 m (multispectral) and SPOT 6/7 in 2015 has a spatial resolution 1.5 m. This research contributes to local government and central government as a database in decision making for coastal area management. The result of analysis shows the average of coastline change in Buleleng Regency is 8.64 m

The Existing Condition of Mangrove Region of Avicenia marina, Its: Distribution and Functional Transformation

Mangrove ecosystem existence is important for environment and other organisms because of its ecological and economical values, so that management and preservation of mangrove ecosystem are needed. The purpose of this research was to determine the existing condition of mangrove, both its distribution and its functional transformation in Indah Kapuk Coastal Area. Avicennia marina  becomes important as wave attenuation,  a form of abrasion antidote. Transect-Square and Spot-Check methods were used to determine the existing condition of A.marina mangrove forests. Autocad program, coordinate converter, Google Earth, Google Map, and Arc View were applied in process of making mangrove distribution map. In western of research location exactly at Station 1 and Station 2, the density value of mangrove was 450 and 825 tree ha-1, respectively with  sparse category because they were contaminated by waste and litter. In eastern of research location namely Station 3, Station 4, and Station 5 the mangroves grow well with density value of 650 (sparse), 1,500 (very dense), and 1,200 tree ha-1 (fair), respectively, eventhough the contamination still happened. The mangrove forests around the stations do not function as wave attenuation because there were many waterfront constructions which have replaced the function of mangrove forests to damp the wave. In short, it can be stated that the mangrove's function has changed in a case of wave attenuation. The function of mangrove forests is not determined by mangrove forest density but it is determined by mangrove's free position

Primary School Character Education : A Sociology Review of Education

Peer reviewedPublisher PD

Pemetaan Jasa Ekosistem Mangrove pada Wilayah Rehabilitasi di Pesisir Sayung, Kabupaten Demak

The mangrove ecosystems on the coast of Sayung Sub-District provide huge benefits to the community. However, this region experienced a very severe coastal erosion during the last few decades. Also, information about mangrove ecosystem services is still very limited in this region. The purpose of this study, therefore, was to map the balance of mangrove ecosystem services on the coast of Sayung Sub-District, Demak District. Data were collected from three coastal villages, namely Bedono, Timbulsloko, and Surodadi, through in-depth interviews, questionnaires, and field observations. The data analysis was carried out using the Burkhard model approach, which involved an ecosystem service matrix, made up of a matrix of capacity, demand, and availability. The results showed that in all components of provisioning service, there was a surplus of availability. In regulating services, there were low surpluses in the components of carbon sequestration and water bioremediation services, while low deficits were found in the service components of reduce wave and current damage, and protecting from sea water intrusion. Then, in cultural services, the two components, shelter for rest area and recreation, experienced a surplus of availability. Mangrove rehabilitation needs to be continued to increase mangrove cover, given the availability of regulating services on components related to erosion prevention in the balace sheet tends to be deficit. Keywords: Burkhard Model, ecosystem services, mangrove ecosystem, Sayung coasta

Faktor-faktor yang Mempengaruhi Perilaku Nelayan Artisanal dalam Pemanfaatan Sumberdaya Perikanan di Pantai Utara Provinsi Jawa Barat

This study aims to estimate accurately the behavior using the Theory of Planned Behavior perspective of artisanal fishermen in Indonesia, in the midst of life with the condition of degradation of marine resources are declining, absolute poverty faced by artisanal fishermen and the more complex issues of coastal resource use in Indonesia with a more diversity of stakeholders utilizing these resources. The population of artisanal fishermen in the northern coast of West Java Province 10,404. Techniques for sampling by cluster random sampling clusters with the number of household sample of 400 artisanal fishermen. Data was collected using a questionnaire interview further processed using the program structural equation model (SEM) and LISREL 8:54. The conclusion of this study were (1) Theory of planned behavior perspective can be used to view the intention to behave and conduct artisanal fishermen in the northern coast of West Java province, despite the possible existence of behavior that is done without the intention to behave (2) the coefficient of determination between the attitude variables, subjective norm, perceived behavior control to variable behavior intention at 0.40. These conditions indicate the existence of other variable factors of 60% outside variables that affect the intention of this study to behave. Meanwhile the influence of variables on behavior intention to behave by 0.51 indicates that it is not fully manifested the intention to behave in accordance with the behavior of fishermen in their fishing activities, (3) that explains the study's findings about the factors that influence the behavior of artisanal fishermen in the utilization fishery resources, can contribute to the activities of co-management of fisheries in Indonesia, especially in communities in the study area on the northern coast of West Java Province

Kondisi Sosial Ekonomi Nelayan Artisanal di Pantai Utara Provinsi Jawa Barat

This study is a research about the socio-economic conditions of artisanal fishermen in the northern coast ofWest Java Province. The purpose of this study was to provide data about the characteristics of socio-economicconditions of fishermen, especially in Java island in the middle is still very limited studies on these themes inIndonesia. Total sample of this study 400 respondents artisanal fishing households in the northern coast of WestJava Province who are scattered in the districts of Cirebon, Indramayu, Subang, Karawang and Bekasi withtechniques for sampling random clusters. The findings of this study again confirms the condition of marginal socialand economic needs of fishermen who co-management in the field of fisheries with the involvement of variousstakeholders. The findings of this study can also contribute in providing a description of one of the stakeholdersbenefiting from the resources of the coastal artisanal fishermen