Analisis Pola Persebaran Pencemaran Air Tanah di Sekitar Penambangan Sumur Minyak Tua Desa Wonocolo, Kedewan, Bojonegoro

Wonocolo Village is a traditional old oil well mining tourism area in Kedewan District, Bojonegoro Regency. This existence affects water quality because it is one of many factors causing groundwater pollution. The purpose study is to determine the distribution pattern of pollution such as iron, manganese, and zinc due to oil mining. Moreover, the study predicts the pattern of distribution of pollution in groundwater over a certain period of time. The method used for this study is groundwater modeling (MATLAB). Thus, determination of sampling based on SNI 6989.58:2008 with 3 (three) sampling points. The determination of the distribution pattern uses the parameters such as Iron, Manganese, and Zinc. The simulation results of the 2-dimensional distribution model and in the range in the next 18 years and 50 years. The prediction result for iron content is still in good condition. Meanwhile for manganese content and zinc content will be polluted after 50 years with a detected distance of ± 1150 m and ± 1400 m respectively from the contaminant source point.

Analisis Sistem Distribusi Air Bersih di Perumahan Ciomas Permai Kabupaten Bogor Jawa Barat

Water distribution systems are often problematic in terms of quantity, pressure, continuity and quality. The research aimed to analyze water distribution system of PDAM Tirta Kahuripan Kabupaten Bogor in Ciomas Permai Residence. The research was conducted by collecting primary and secondary data. Analysis of clean water distribution system was carried out using the EPANET 2.0. Ciomas Permai Residence was located in zone 6 of PDAM Tirta Kahuripan servive areas. The result showed that the quality of the distributed water was in accordance with the applicable standard and continuous for 24 hours even though there were significant discharge differences during peak hours. Based on the measurement on Sunday and Monday, the minimum discharge were 14.4 l/sec and 13.8 l/sec respectively, higher than customer requirements of 7.34 l/sec, The water distribution pressure ranged from 0.7 - 1.35 bar. The result of clean water distribution simulation using EPANET 2.0 showed that the velocity of water and headloss were not accordance with the applicable standards.

Analisis Kekuatan Struktur Bangunan Dermaga Kayu di Babo Teluk Bintuni, Papua Barat

Analysis of structural strength to the conditions of the jetty Port Babo of Teluk Bintuni, West Papua is important to ensure the stability of the against external loads and forces. The purpose of this research is to analyse and evaluate the strength of structures, as well as assess the durability of jetty structures. Modeling using the SAP2000 program corresponds to as built drawing. The results of the calculation of the working load include dead loads, live loads, ship berth, ship mooring force, current force, wave force, and earthquake force. Energy due to ship collision loads and vessel berthing force can be reduced using a fender designed using rubber fenders seibu V300H. The results of the structural analysis show that the number of combined variants is sufficient up to the shape mode 12. The dynamic earthquake shear forces in the x and y directions are still smaller than the static shear forces, so it needs to be multiplied by a scale factor of 2,9. The deviation that occurs in the structure is still smaller than the allowable deviation of 350 mm. Beams are designed using reinforcement with diameter 22 mm and 25 mm. The stress ratio value at the pile meets the pile capacity. It can be said that overall the Babo Teluk Bintuni wharf is safe from the working load.

Ecobrick Sebagai Solusi Dinding Nonstruktural Ramah Lingkungan

Population growth increased in the need for dwelling which impacted to high demand for bricks. However, bricks have a negative impact on the environment due to the materials and the production prosses. Population growth also effected an increase amount of plastic waste that has a risk to the health and environment. This research aimed to analyze the compressive and flexural strength of brick and ecobrick (PET bottle filled with plastic waste) wall, to know degree of difference in strength between both wall, and to compare the cost of making the wall. This research was started from preparation, manufactured, cured, and tested the specimens. The cost analysis refers to the Bogor district in 2019. The result was obtained compressive strength of brick is higher than ecobrick, which is brick 2,38 MPa and ecobrick 1,31 MPa. Flexural strength of ecobrick is higher than brick, which is ecobrick 1,23 MPa and brick 1,18 MPa. T-test show that compressive strength both wall is significantly different, while the flexural strength both wall is not significantly different. The cost of making ecobrick walls is 20% cheaper than brick walls.

Analisis Analisis Neraca Air di Pulau Jawa-Bali sebagai Upaya Antisipasi Krisis Air

Water is one of the basic necessities used by living things on this earth. Along with the population growth with climate change, there are several cases of water crisis in Java and Bali, especially in the dry season. The purpose of this research is to project water demand and availability based on climate change scenarios, develop an analysis model for the impact of climate change on the water sector based on the water balance, and calculate environmental economic losses resulting from water deficit losses. The type of scenario used in climate analysis is RCP (Representative Carbon Pathway) 4.5 with two types of models. Provinces experiencing very critical water conditions in the 2021-2050 period using the CSIRO model are DKI Jakarta, East Java and Bali, with water criticality indexes of 296.25%, 113.88% and 123.64%, with a water deficit loss of IDR 1.2 billion, IDR 7.93 billion and IDR 0.87 billion. Whereas with the MIROC model, the areas that have very critical water conditions are DKI Jakarta Province with a water criticality index of 220.36%, with a water deficit loss of IDR 0.42 billion.

Analisis Pengaruh Perubahan Penggunaan Lahan terhadap Debit Sungai (Studi Kasus : Sub DAS Cikeas)

Land use change have an impact on infiltration capacity. There is often an annual flood on Kadumanggu District. When the rainfall is high so the river will be overflow. The outlet of Cikeas sub-basin was located on Kadumanggu District. This research aimed to determine the maximum discharge of the Cikeas River and analyze the relation between land use change and discharge of Cikeas River. The research was conducted by delineating the water catchment area, analyzing rainfall, making a land use map and modeling with HEC-HMS. Based on the modeling results, the maximum discharge of the Cikeas River in 2000 was 74.3 m3/s, in 2009 was 84.9 m3/s, and in 2018 was 91.7 m3/s. The catchment area with an extensive use as residential had a higher river discharge compared to the area with a large green area. It meaned that, land use changes greatly affected the river discharge.

Estimasi Dampak Urban Heat Island terhadap Laju Evapotranspirasi: Studi Kasus di Kota Palembang

A review of air temperature in the Palembang city by reviewing data from the National Agency for Meteorology, Climatology, and Geophysics/BMKG (Kenten Climatology Station and the SMB II Meteorological Station) shows a difference in air temperature can indicate the occurrence of Urban Heat Island (UHI). The difference in air temperature affects the evapotranspiration rate (ET) because air temperature very influencing water evaporation. ET rate estimation with air temperature data is the first step to prove this hypothesis. Hargreaves and Samani, Blaney and Criddle, Linacre, and Kharuffa models is the ET model that using air temperature as the variable was used to estimate the ET rate. Air temperature data used in the period 2011-2020 by reviewing data from the Kenten Climatology Station and the SMB II Meteorological Station. The results of this study of air temperature data from the Kenten Climatology Station and the SMB II Meteorology Station showed a difference in air temperature with the minimum ∆T of 0.42 oC, the maximum of 0.43 oC, and the daily average of 0.41 oC. This difference in air temperature has an impact on the difference in the ET rate with the average ∆ET of the Hargreaves and Samani model of 0.05 mm/day, the Blaney and Criddle model of 0.05 mm/day, the Linacre model of 0.06 mm/day, and the Kharuffa model of 0.14 mm/day. The results of this study predicted that an increase in air temperature causes an increase in the ET rate of ± 10-30%.

Analisis dan Desain Struktur Atas Hotel 10 Lantai di Kabupaten Bogor terhadap Beban Gempa

The type of soil at the location of the hotel building is a type of medium land (D). The applications used in this study are ETABS V16.1 and AutoCAD. Based on the PUSKIM website, the Ss and S1 Bogor City were 0.881 and 0.356, respectively. Based on the results of the analysis of the application ETABS V16.1 obtained fewer reinforcement design results than the existing reinforcement. The maximum nominal moment of the beam is 508.3 kNm while the ultimate moment is 498.4 kNm. The maximum nominal shear force of the beam is 565.9 kN while the ultimate shear force is 538.4 kN. The maximum nominal moment of the column is 1488.5 kNm while the maximum ultimate moment is 1478 kNm. The maximum nominal axial force of the column is 6291 kN while the maximum ultimate axial force is 6287 kN. The maximum nominal bending moment of the floor plate is 41.3 kNm while the maximum ultimate moment is 39.9 kNm. The maximum nominal shear force of the floor plate is 234.7 kN while the maximum ultimate shear force is 228.9 kN. The nominal shear force of shear wall is 8238.5 kN while the ultimate shear force is 8194.7 kN. Based on the internal forces, the building that has been built is in accordance with the plan so that it is safe to withstand earthquake loads.

Analisis Kinerja Waktu dan Penerapan Building Information Modeling pada Proyek Pembangunan Jasmine Park Apartment Bogor

Increasing of certainly development requires jobs with high productivity, effectiveness and efficiency. The application of BIM up to four-dimensional modeling (4D) using Tekla Structure software is a solution because it can analyze time performance, determine the causative factors in the event of delays and actions to overcome them. 3D modeling included modeling of foundations, columns, beams, slabs, stairs, and roofs. 4D modeling is conducted by adding work schedule to the 3D modeling that had been made. Time performance analysis was performed using the S-curve method for all buildings in Tower Green Jasmine Park Apartment Bogor construction project. Time performance analysis using the S curve found that this project experienced delays with the highest negative deviation value happened in June 2020 by -13.67%. The main delays in the project occured in procurement of MEP logistics and weather conditions. Work acceleration is carried out by increasing working hours and increasing the number of workers.

Perencanaan Pengembangan Prasarana Kawasan Ekowisata Situ Gede Kota Bogor

Situ Gede area includes a local protection area, functioning as a water catchment area and protected area that will be developed into an ecotourism area based on RTRW and RTBL Situ Gede area and CIFOR fiscal year 2014. The research was conducted to evaluate the existing infrastructure and to make the planning of its development special on environmental roads, waste systems, and parking buildings. The research method begins with the creation of the basic map of Situ Gede area, the retrieval of existing data using secondary data, infrastructure planning in the form of environmental roads, waste management system, and parking building planning, and the creation of infrastructure development planning map Situ Gede area as an external expected from this research. Planning to observe the conservation aspects of water resources by conducting zoning utilization. The zoning arrangement was conducted to provide protection, use, and control of existing resources, especially the creation of a lake boundary of 50 m wide from the body.