Top PDF Analysis on Soil Liquefaction Potential in Pangandaran Coastal Area West Java

Analysis on Soil Liquefaction Potential in Pangandaran Coastal Area West Java

Analysis on Soil Liquefaction Potential in Pangandaran Coastal Area West Java

earthquake in a coastal area which contains saturated sand soil is liquefaction potential. This phenomenon occurs when earthquake hits, the water pore pressure increases and the effective stress becomes nil then the soil loss its shear strength. With the objective to study the liquefaction potential in Pangandaran coastal area, this analysis was conducted. Two kinds of analysis were performed by manually calculation method and using Quake Geostudio program. Seed’s method based on safety factor as a key control to determine the liquefaction potential was used. This method requires N-SPT data. The result of the analysis showed that based on Seed method with a value acceleration of earthquake is 0,5g, FS value is 1,55. This value means that Pangandaran coastal area is not susceptible to liquefaction. From the analysis using Quake, as ground acceleration increases, pore water pressure also increases. It means the higher of ground acceleration can have liquefaction potential.
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A Predictive Modeling Approach for Assessing Seismic Soil Liquefaction Potential Using CPT Data

A Predictive Modeling Approach for Assessing Seismic Soil Liquefaction Potential Using CPT Data

To assess the potential for liquefaction triggering, current practice relies on empirical liquefaction models (ELM’s) (NAE, 2016). These ELM’s are developed by measuring or estimating soil properties and seismic loads at sites of observed liquefaction or nonliquefaction following earthquakes. Modelers then use a variety of statistical methods ranging from simple regressions to complex machine learning techniques to determine the relationship between soil properties/seismic loads and liquefaction potential. These relationships are used to make predictions of potential liquefaction occurrence at future sites during engineering design and analysis. However, as discussed at length by the Committee on State of the Art and Practice in Earthquake Induced Soil Liquefaction Assessment there are significant shortcomings of current ELM’s (NAE, 2016).
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Standard Penetration Test-Based Probabilistic and Deterministic Assessment of Seismic Soil Liquefaction Potential

Standard Penetration Test-Based Probabilistic and Deterministic Assessment of Seismic Soil Liquefaction Potential

This section presents a concise summary of some of the key ele- ments of the conventions and procedures employed in evaluation of the field performance case histories. A more comprehensive description is provided by Cetin (2000), and by Cetin et al. (2000). More complete summaries of each of the case histories employed in these studies, and citations of source references for these are presented in Cetin et al. (2000). It should be noted that the processing and analysis of the field case histories is one of the most difficult, sensitive and time-consuming elements of the work involved in developing the types of correlations proposed herein. It is also of critical importance, and often requires considerable judgment. Differences between the correlations proposed by dif- ferent teams of researchers are often due, in no small part, to differences in the interpretations and analyses of the contributing individual field case histories.
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Potential liquefaction of loose sand lenses (case study In Surabaya East Coastal Plain, Indonesia)

Potential liquefaction of loose sand lenses (case study In Surabaya East Coastal Plain, Indonesia)

Hypotheses based on historical seismicity, geological, seismic reflection and refraction, and potential field data have been proposed to explain the current seismicity at study area. However, almost entirely source points of seismotectonic from subduction zone deriving from southern of Java Island were considered dominantly influencing to Surabaya area (Fig. 7). Point sources from seismotectonic mechanism adjacent to folding or fault zone in Pucangan, Kabuh, Lidah, and Pamekasan area have extremely little influence on the ground shaking, because the sources points having the magnitude (M) > 5.0 SR were not found in this zone. Fig. 8 shows the distribution of seismic source points nearby Surabaya area. None of these models appears to be universally accepted by the scientific community. However, there does seem to be a trend toward the definition of seismic zones that would encompass the possible tectonic features proposed by some models and the recorded seismicity. Using the location of the epicenters of past earthquake, proposed to modeling of seismic sources shown in Fig. 9 and Fig. 10 [2]. Function of attenuation was selected based on subduction earthquake mechanism [4]. Attenuation function from Crouse (1991) is selected and assumed the same with mechanism of earthquake caused by subduction zone. Critical earthquake models using USGS method is box source type of shallow and deep earthquakes, respectively. The results of maximum acceleration (PGA) recommendation values of ground surface for Surabaya area based on seismic risk analysis with attenuation function from Crouse are shown in Fig. 11.
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GOVERNMENT POLICY STRATEGY IN THE DEVELOPMENT OF MARINE TOURISM IN PANGANDARAN REGENCY, WEST JAVA PROVINCE

GOVERNMENT POLICY STRATEGY IN THE DEVELOPMENT OF MARINE TOURISM IN PANGANDARAN REGENCY, WEST JAVA PROVINCE

Pangandaran Regency is a division of Ciamis Regency on October 25, 2012 according to Law No. 21 of 2012 concerning the Establishment of the Regency of Pangandaran. Pangandaran Regency itself is one of the districts with superior tourism potential in West Java. As one of the districts that has considerable tourism potential, as with the vision & mission of Pangandaran Regency according to the Tourism and Culture Office of Pangandaran Regency which is making Pangandaran as a world-class tourist destination, Pangandaran Regency is expected to be able to excel in all sectors, especially the tourism sector. Marine Tourism is a tourism activity that is oriented to the territorial waters and the sea by utilizing the potential available for recreational activities and other marine activities. What is done under the sea or at sea level, such as snorkeling, banana boat, or just enjoying the beauty of the beach. Therefore a regional government policy strategy is needed to improve the welfare of coastal communities in Pangandaran district. This research aims to describe the profile of local government policy strategies in the past five years as an effort to develop marine tourism in Pangandaran Regency and to analyze the policies that have been implemented so that they can be recommended in the field of marine tourism. The research method used in this research is a descriptive method on the basis of case studies. Analysis of the data used in this study uses the Soft System Methodology approach. Based on the problem approach, the unstructured problem illustrates the exiting condition. Exiting conditions include technical or non-technical aspects, aspects of governance, and aspects of Human Resources.
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Potential Liquefaction of Loose Sand Lenses: Case Study In Surabaya East Coastal Plain, Indonesia

Potential Liquefaction of Loose Sand Lenses: Case Study In Surabaya East Coastal Plain, Indonesia

Hypotheses based on historical seismicity, geological, seismic reflection and refraction, and potential field data have been proposed to explain the current seismicity at study area. However, almost entirely source points of seismotectonic from subduction zone deriving from southern of Java Island were considered dominantly influencing to Surabaya area (Fig. 7). Point sources from seismotectonic mechanism adjacent to folding or fault zone in Pucangan, Kabuh, Lidah, and Pamekasan area have extremely little influence on the ground shaking, because the sources points having the magnitude (M) > 5.0 SR were not found in this zone. Fig. 8 shows the distribution of seismic source points nearby Surabaya area. None of these models appears to be universally accepted by the scientific community. However, there does seem to be a trend toward the definition of seismic zones that would encompass the possible tectonic features proposed by some models and the recorded seismicity. Using the location of the epicenters of past earthquake, proposed to modeling of seismic sources shown in Fig. 9 and Fig. 10 [2]. Function of attenuation was selected based on subduction earthquake mechanism [4]. Attenuation function from Crouse (1991) is selected and assumed the same with mechanism of earthquake caused by subduction zone. Critical earthquake models using USGS method is box source type of shallow and deep earthquakes, respectively. The results of maximum acceleration (PGA) recommendation values of ground surface for Surabaya area based on seismic risk analysis with attenuation function from Crouse are shown in Fig. 11.
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The Dynamics of the Developing Calcarenite Member of Pamutuan Formation In Cintaratu Area, Pangandaran, West Java

The Dynamics of the Developing Calcarenite Member of Pamutuan Formation In Cintaratu Area, Pangandaran, West Java

The characteristics of the Calcarenite Member of Pamutuan Formation are verified by a macroscopic and microscopic description of the limestone in the investigated area. Five units are distinguished based on lithological and paleontological characteristics (namely intraclast-larger foram bioclastic packstone, larger foram bioclastic packstone, planktic foram bioclastic packstone, interbedded calcareous mudstone-sandstone, and larger foram bioclactic grainstone). The distribution of the units contributes to the analysis of the dynamics of the development of the Calcarenite Member. Fossil analysis indicates the position of each rock unit in the reef complex at the Early to Late Middle Miocene (Tf1 or N.10 to Tf2 or N.13). Hence the position of the Middle Miocene coastal line might be interpreted showing the NNW-SSE direction. This evidence supports the interpretation of the land area of Southern Mountain and the regional structure. The investigation contributes to clarify the position of Calcarenite Member in Pamutuan Formation as the reef body in the deposition of volcanic clastic. The detailed lithologic description through measured section combined with paleontological and facies
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Analysis of Blank Spot Data in the Communication Area with the Geoprocessing Method in Southern West Java

Analysis of Blank Spot Data in the Communication Area with the Geoprocessing Method in Southern West Java

Abstract In this study, the southern part of West Java Province, especially along the southern coastline in Cianjur Regency (in part), Garut Regency, Tasikmalaya Regency, and Pangandaran Regency, has tremendous potential. For the southern path of West Java alone, 417.4 km connected, from the start of Sukabumi Regency to the west of West Java, to Pangandaran Regency in the east of West Java, the potential and uniqueness of almost all new roads along the southern path of West Java show the extraordinary beauty and natural resources of West Java. Almost all roads on this track it is very neat, new and sturdy bridges. The residents along the southern coastline of West Java have begun to be busy in fishing industries, farms, timber industries, and other industries. But the means of cellular communication, especially along this route, which was the object of research in this study, signals exist and do not exist. There are some 2G, some 3G, and 4G will begin to appear when entering Big cities such as Pameumpek and Pangandaran. This research is expected to be able to map all blank spot areas, cellular operator signal services, especially on the new road along the coast in South West Java to the east from the starting point east of Cianjur Regency to the west of Pangandaran Regency. Desimination tools using geographic information systems, the method used by geoprocessing will overlay regional maps, satellite maps, and cellular operator BTS signal maps.
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CHEMICAL COMPOSITION OF TORTILLA CHIPS WITH THE ADDITION OF SQUID INK (LOLIGO VULGARIS LAMARCK, 1798) IN PANGANDARAN WATER, WEST JAVA, INDONESIA

CHEMICAL COMPOSITION OF TORTILLA CHIPS WITH THE ADDITION OF SQUID INK (LOLIGO VULGARIS LAMARCK, 1798) IN PANGANDARAN WATER, WEST JAVA, INDONESIA

The ink sac is a gland that produces ink rich in melanin which is above the large intestine which empties near the anus which forms as a diverticulum from the back of the intestine (Derby 2014). Squid ink contains melanin, protein, lipids, glycosaminoglycans, muco- saccharides (Kim 2014). Melanin of ink squids have anti-tumor activity by inhibiting activity thromboxane plasmin to increase and improve the immune system to kill cancer cells (Zhong et al. 2009). Based on the research Nair et al. (2011) stated that cuttlefish and having ink or cuttlefish antibacterial activity. Sac ink squid known rich in taurine and hydroxyproline (Shirai et al. 1997). Of the nature of antiretroviral as squid ink , antitumor , anti oxidant , and the ability to protect a cell from damage caused by chemotherapy and potential of the antibacterial of ink squid pathogenic against bacteria (Smiline et al. 2012).
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Geothermal Resource Ofbatukuwung Area, Serang Regency, West Java

Geothermal Resource Ofbatukuwung Area, Serang Regency, West Java

With respect to the rock units existed in the area, Syah Alam et al (2014) 7) found a almost similar four major rock units, those are: 1) Mt. Parakasak lapili tuff, 2) Mt. Parakasak volcanic breccia, 3) Mt. Karang volcanic breccia, and 4) Rawa Danau sediment. The basic rocks in Batukuwung area which are dominantly occupied by lava andesite, volcanic breccia, and volcanic alluvial may have strong influenced to form geothermal resource due to volcanic and magma activity in the regional area of Rawa Danau. With the existence of caldera and fluid flow in the lake investigation of geology found volcanic rocks that experienced alteration. Mielke et al (2015) 8) performed research in Tauhara geothermal area, Iceland. Lithologically the rocks in the area are andesite lava and breccia, rhyolite lava breccia, sandstone, siltstone, mudstone, breccia and tuff. They found that with hydrothermal alteration intensity that has been investigated, variations in permeability, porosity, thermal conductivity and specific heat capacity are related to lithology and intensity and nature of hydrothermal alteration.
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Ground Motions and Liquefaction Potential

Ground Motions and Liquefaction Potential

Index Properties, LL, PI, Soil Classifications, Fines Content and soil behavior studies were made intensely. Table 3 presents some of the soil properties of the alluvial foundation, which will allow us to predict its behavior respect to liquefaction. Most of the samples were taken from drillholes, and were tested in the laboratory. Because of the high fines content determined, the liquefaction potential predicted by the SPT method may not occur at the dam site. However, according to the studies performed by Seed [2] the clayey portions of the Qal may experience loss of strength during the earthquake event due to cyclic failure.
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Field Verification of the Energy-Based Procedure to Predict the Liquefaction Potential of Soil Deposits

Field Verification of the Energy-Based Procedure to Predict the Liquefaction Potential of Soil Deposits

The Wildlife site consists of a loose silt surface layer down to a depth of 2.5 m, a loose silty-sand layer between 2.5 m and 6.8 m, and a stiff to very stiff silty-clay layer from 6.8 m to about 11.5 m based on the in situ and laboratory investigations (Bennett et al. 1984; Hagg 1985). The ground water table was at about 1.5 m in depth. The movements of the soil deposit during these earthquakes were monitored by installing two accelerometers at the ground surface and at a depth of 7.5 m, respectively. The recorded acceleration time series at a depth of 7.5 m during these two earthquakes were chosen as input excitation. Their EW (East-West) and NS (North-South) components are shown in Figs. (5) & (6), respectively. The values of parameters used in the analysis are listed in Table 3.
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Potential and Challenges on Amphibians and Reptiles Research in West Java

Potential and Challenges on Amphibians and Reptiles Research in West Java

an example that conducting sampling in the region that has never been sampled is worthy, regardless the areas are within or outside con- servation areas. The value of doing so is not only improving the species list in the region, but also improving the status of the areas. For example, the discovery of K. minusculus - a lowland specialist (Iskandar, 1998; Higgin- bottom et al., 2019), is hoped to increase the value of Leuweung Sancang NR as one of the remaining conservation areas with low- land habitat in West Java, besides Pananjung Pangandaran NR (Nurjaman et al., 2017). The management of the Curug Cigorobog could also take the discovery of L. borbonica into consideration while planning to expand the areas as tourist destination. To conclude, our study demonstrated that diversity of amphib- ians and reptiles in West Java is still underes- timated. West Java has tremendous potential for comprehensive herpetofaunal research despite the availability of conservation areas are limited. We have demonstrated that con- servation and non-conservation areas are both highly prospective for any types of research on amphibians and reptiles. The study should at least cover the information about species identity, biological aspects, habitat and ecol- ogy, population and distribution areas, which are the necessary for designing effective and efficient conservation priorities. Maintaining biodiversity while keeping the ecosystem bal- ance are hard practice. Thus, natural resources utilization must be managed sustainably.
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Mapping of Seawater Intrusion into Coastal Aquifer: A Case Study of Pekalongan Coastal Area in Central Java

Mapping of Seawater Intrusion into Coastal Aquifer: A Case Study of Pekalongan Coastal Area in Central Java

ABSTRACT Seawater intrusion promotes the degradation of groundwater quality through excessive pumping activities or natural phenomena such as tidal floods which are popular with coastal areas. Pekalongan city is one of the areas affected by this phe nomenon and was analyzed in this study with reference to the 1986 Ad Hoc Sea Water Intrusion (PAHIAA) Decree which classifies water into five based on salinity. This involved using the Integrated Distance Method (IDW) to map and applying the logarithmic equation to determine the dispersion relationship. The results showed seawater intrusion has already affected groundwater quality up to 6.52 km from the coastline for total dissolved solids and electrical conductivity and 7.22 km for chloride ion. The distribution of TDS, EC, and Cl - in the freshwater zone was also recorded to have reached 28.59 km 2 , 28.36 km 2 , and 23.95 km 2 respectively. It is predicted that in 4 years, there would no longer be freshwater in Padukuhan Kraton Village due to decreasing groundwater quality caused by seawater intrusion. Furthermore, 23.03 km 2 Pekalongan area which spread into 4.34 km 2 to the West, 0 km 2 to the South, 14.39 km 2 to the North, and 1.28 km 2 to the East of the district has also been affected and was discovered to be caused mainly by tidal flood from Bremi and Tirto rivers.
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Potential Ecology Suitability Distribution of Forage Availability for Dairy Cattle. Case  study: Lembang District Area, West Java

Potential Ecology Suitability Distribution of Forage Availability for Dairy Cattle. Case study: Lembang District Area, West Java

consumptions required. The quality and form of forage effect to dry matter consumptions and milk produce in dairy cattle. Forage plays critical roles due to economical and environment reason. Devandra (1994) stated that the sustainability on animal livestock enterprises needed to be developed without harming the natural resources.The supply of forage highly dependent on (1) climate factors, including temperature, humidity, and annual rainfall, (2) soil fertility, (3) forage variety (4) management system, (5) environmental adaptation. The supply of tropical forage forced many problems, especially when there was a lack of nutrient soil that lead lower forage production. In addition, the different stage of forage growth might be influence.
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Spatial variability of some soil properties varies in oil palm ( Elaeis guineensis Jacq.) plantations of west coastal area of India

Spatial variability of some soil properties varies in oil palm ( Elaeis guineensis Jacq.) plantations of west coastal area of India

Oil palm (Elaeis guineensis Jacq.) is a high-oil-yielding crop compared to annual oil crops (Johnston et al., 2009; Murphy, 2009). Oil palm uses about 162, 30, 217, 38 and 36 kg of N, P, K, Mg and Ca ha −1 year −1 , respectively, to produce 2.5 Mg of oil ha −1 year −1 (Mengel and Kirkby, 1987). Considering oil to bunch ratio of 1 : 4, 2.5 Mg oil ha −1 is equivalent to 10 Mg FFB ha −1 year −1 , but average FFB yield in well-managed plantations is much higher (Narsimha Rao et al., 2014). Nutrient content in 1 Mg of FFB obtained from Dura palms is 2.94, 0.44, 3.71, 0.77, 0.81 kg of N, P, K, Mg and Ca, respectively, whereas Mn, Fe, B, Cu and Zn con- tent per 1 Mg of FFB is 1.51, 2.47, 2.15, 4.76 and 4.93 g, re- spectively (Ng and Thamboo, 1967). Calibrated soil and leaf analysis helps in effective fertilizer recommendations in most of the crops (Smith and Loneragan, 1997; McLaughlin et al., 1999). In oil palm, leaf nutrient analysis is commonly used for estimating fertilizer requirement (Fairhurst and Mutert, 1999; Corley and Tinker, 2003). The relationship between leaf analysis and palm productivity is generally evident, and an assessment of fertilizer needs can be based on such an analysis. However for a cost-effective approach, leaf analy- sis has to be integrated with soil analysis (Goh et al., 2003). It is therefore pertinent to assess soil nutrient status for effec- tive and sustainable fertilizer management programme in oil palm.
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On the Geomorphology and Tectonic Position of Ciletuh Jampang Area, West Java, Indonesia

On the Geomorphology and Tectonic Position of Ciletuh Jampang Area, West Java, Indonesia

Geopark Network (GGN) of Unesco. Although it is at a very initial state, many institutions including local government, supporting the proposal, taking into account the beautiful panorama available in the area. A mega-amphitheater, surrounded by waterfalls, presents an impressive view rarely found. Furthermore, from the geological point of view, the typical rocks of oceanic crust exposed in this area indicate the boundary between the continent and the ocean in the Eocene time or 50.1±2.1 Ma ago (Schiller et al., 1991)[1]. The melange assemblages strongly support the evidence of the ancient subduction in this area. Hence the delineation of tectonic boundary between Eurasian continent and the Indian oceanic crust might be located. The rocks date back to Eocene time represents the basement of Java Island, where a pile of younger rock sequences of Upper Tertiary age laid on. The oldest rock in West Java area based on the borehole’s sample indicated the age of 213±11 Ma or
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Salt leaching of heavy coastal saline silty soil by controlling the soil matric potential

Salt leaching of heavy coastal saline silty soil by controlling the soil matric potential

Abstract: Techniques of drip irrigation are broadly applied for the reclamation of saline-alkali lands, during which effective management of water use to accelerate salt leaching is essential for crop production. In 2017, a field expe- riment with five treatments of soil matric potential (SMP) levels of −5, −10, −15, −20, and −25 kPa was conducted in heavy saline silty soil land in Bohai Bay, China to study the effects of drip irrigation on salt leaching. The results showed that salt leaching was enhanced with increasing SMP, particularly under an SMP of −5 kPa within a 30 cm soil profile depth and 15 cm distance from the dripper, and the average electrical conductivity of saturated paste extracts (ECe) decreased from 13.8 to 1.52 dS/m. Water consumption increased with increasing SMP, but the yield of oil sunflower did not differ significantly between SMPs of –5 and –10 kPa. These findings indicated that a relatively high crop yield of oil sunflower and effective salt leaching can be achieved if the SMP can be controlled at –10 kPa in heavy saline silty soil.
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Toward a tourism destination brand equity of coastal tourism of Pangandaran Regency

Toward a tourism destination brand equity of coastal tourism of Pangandaran Regency

The second step of building a brand is the target customer and portfolio matching (Balakrishnan, 2009). Pangandaran needs to match their branding strategy to the portfolio of its visitors. As of now the main visitors of Pangandaran is domestic, which usually come in a large group using buses or as a family using a car. The length of their stay is usually not long; visitors mostly stay only one night at the weekend. Since the primary demographic of Pangandaran are domestic tourists, the government could employ integrative diversification strategy in order to appeal to their market These strategies could include integrating the usage of Pangandaran local products in tourism activity in order to enhance Pangandaran image as a coastal tourism destination or integrating various activity in beaches of Pangandaran in order to strengthen their image (Benur & Bramwell, 2015).
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Isolation and identification of halotolerant soil bacteria from coastal Patenga area

Isolation and identification of halotolerant soil bacteria from coastal Patenga area

Halophilic and halotolerant bacteria are essential for salty foods production as Thai fish sauce, pickling brines and salt-cured bacon [10]. Isolates from effluents of tex- tile industries also showed the ability to decolorize the utilized azo dyes [11]. Halotolerant bacteria, recovered from the composting process, were able to produce hydrolases, lipases, proteases, amylases, cellulases and biopolymers [12]. Four halotolerant species (Bacillus atrophaeus, Halomonas shengliensis, Halomonas kore- ensis and Virgibacillus salarius) showed the ability to metabolize hydrocarbons and isolates as V. salarius and Brevibacillus sp. KUMAs1 has the potential to be used for bioremediation [13, 14]. Nevertheless, Corynebacte- rium xerosis was the potent degraders of hydrocarbons (petrol and diesel) [15]. Halophilic and halotolerant bac- teria can be used for the production of enzymes with dif- ferent immunological properties [16] and also essential for nutrient recycling and for maintaining the soil health in a salty environment [17].
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