Estimation of land subsidence induced by groundwater extraction has been observed by some researchers using field instrumentation as well as a spatial mapping technique. Among six Asian cities previously studied (Bangkok, Jakarta, Manila, Osaka, Seoul, Taipei, and Tokyo), the rate of land subsidence in Jakarta is the highest in the period from 1900-2010. In order to improve the applicable monitoring system and obtain comprehensive results for subsidence measurement, tools for raising the government's and society's awareness of subsidence are needed. This paper aimed to determine a benchmark and perform an analysis of sustainable counter measures for land subsidence induced by groundwater extraction in the urban areas of Jakarta city, using a continuous monitoring system and integrated data management system. Land subsidence was measured using field monitoring techniques, such as an extensometer, a leveling survey (global positioning system,GPS; geodetic measurements), and observation wells; this was conducted in some locations in north Jakarta from 1990-2016. The results from the visual observation identified an average land subsidence rate of 1.65 cm/year, while the GPS geodetic measurements ranged from 0-12 cm/year. Monitoring from seven extensometer sensors installed in different borehole elevations revealed subsidence of 0.66 cm on average. Meanwhile, the groundwater surface level ranged from 0.6 m to 44 m from the surface, with the deepest being in the area of Bintaro, South Tangerang. Data analysis was conducted using a computer simulation to investigate the inter-connection between land subsidence and groundwater extraction. Consequently, land subsidence was found to have a strong association with groundwater extraction. Integrated data management systems, including data sharing, are needed to improve the appropriate monitoring system of land subsidence in Jakarta.
Rainfall is a determining factor in analyzing planned floods. This research was conducted by collecting secondary data and the field data concerning the soil’s ability to infiltrate the volume of rainfall. Data processing is carried out by statistical analysis to estimate the average rainfall, intensity value, estimated discharge plan, volume of runoff and estimated infiltration rate. These parameters are important related to the infiltration well dimensions planning and the conserving water area. From the research results, it is shown that infiltration rate and optimal dimensions of infiltration wells very dependent on rainfall discharge and runoff volume in each region. Artificial infiltration is an alternative solution for maintaining groundwater balance and overcoming water problems. With groundwater infiltration, groundwater infiltration can maintain a relatively stable groundwater depth. Infiltration rate in RT 06 Cawang are 54,03 cm/hour lower than in Kelurahan 11 Cawang East Jakarta are 54,12 cm/hour, with perimeter area of wells DSP = 1,5 m2, Depth of well (HSP) = -1,89 m2 and coverage area of well (ASP) = 1,77 m2.
Road drainage function as important part that can control a large rainfall that caused puddles that often disturb the comfort of all community activities on the road. Condition of the drainage channel on the road Kebon Pala area, East Jakarta are not qualified due to mistake planning and lack of maintenance. Hence, it is necessary to evaluate the capacity of drainage channel on Road Perindustrian. The purpose of this study is to find the maximum amount of water flow that can be accommodated by drainage channels. Rain intensity was calculated using the Mononobe method, as well as the flow rate is calculated using the Rational method. The existing capacity of drainage dimensions are measured directly in the the field using Manning method for calculating flow velocity. The results obtain Q2yrs = 1.27mm/s, Q5yrs = 1.67mm/s, Q10yrs = 1.84mm/s, while Q channel 0.24mm/s. Thus, it can be concluded that capacity of road drainage channel is lower than Q rain that can not accommodate the existing rain flow.
Penataan sistem Drainase dan Lingkungan di wilayah pemukiman pada penduduk yang ada di kota madya Jakarta Timur merupakan suatu kebutuhan yang sangat mendesak. Terlebih di masa pandemic COVID-19 yang telah berlangsung selama lebih dari 1 tahun, pembenahan lingkungan yang bersih, nyaman dan asri adalah salah satu cara untuk memutuskan mata rantai penyebaran penyakit tersebut. Keterbatasan lahan untuk zona hijau ataupun infrastrukur drainase dan trotoar jalan tentunya membutuhkan perencanaan secara optimal sesuai kriteria teknis sesuai standar yang ada untuk mendapatkan lingkungan perumahan yang sehat, aman dan nyaman bagi setiap penghuni. Untuk itu Program Studi Teknik Sipil UKI sebagai bagian dari masyarakat akademik yang berada di wilayah Kelurahan Cawang melalui Pengabdian kepada Masyarakat terlibat dalam memberikan pembekalan teknis dalam rangka penataan lingkungan dan hunian yang memenuhi standar di kawasan seperti ini.
Industri 4.0 sudah digaungkan oleh Pemerintah Republik Indonesia. Konsep dalam Industri 4.0 ini membutuhkan perubahan yang fundamental dalam setiap sendi-sendi kegiatan bisnis yang sudah sekian lama dilakukan. Business as usual, sebuah frasa yang tidak lagi berlaku untuk melakukan sebuah perubahan mendasar. Efisiensi dalam konteks digitalisasi proses bisnis EPC (Engineering, Procurement and Construction) sangat diperlukan saat ini. Terlebih jika kondisi perusahaan sedang dalam masa sulit atau resesi akibat pandemi covid-19, perlu penerapan konsep EPC 4.0 dengan penyesuaian terhadap kebutuhan perusahaan secara khusus dan negara secara umum. Banyak hal mendasar yang akan mengalami distraksi dalam industry EPC 4.0, antara lain hubungan antara pemilik proyek, kontraktor, sub-kontraktor dan supplier, kemudian pola rantai suplai barang dan material, organisasi, otomasi dan faktor sumber daya manusia
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