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"Air merupakan sumber daya untuk melindungi lingkungan dan memenuhi kebutuhan manusia, khususnya di daerah DKI Jakarta dan sekitarnya yang mengalami peningkatan jumlah penduduk. Air tanah menjadi sumber air bersih yang relevan, mengingat jumlah sistem penyediaan air bersih yang sangat terbatas. Kualitas air tanah menjadi salah satu isu penting karena fungsinya dalam kebutuhan rumah tangga, industri, maupun kebutuhan lainnya. Penelitian ini dilakukan di area selatan Cekungan Air tanah Jakarta akuifer pada tidak tertekan bertujuan untuk melakukan evaluasi terhadap air tanah yang memenuhi standar kualitas baku mutu untuk keperluan air minum, penduduk, industri, dan lainnya. Penelitian ini menggunakan data parameter fisika-kimia air tanah tahun 2023 mencakup kekeruhan, zat padat terlarut (TDS), pH, Besi (Fe), Mangan (Mn), Nitrat (NO3), dan Nitrit (NO2), serta mengacu terhadap Peraturan Kementrian kesehatan No. 02 Tahun 2023 dan menggunakan metode Indeks Pencemaran yang mengacu terhadap Keputusan Menteri Lingkungan Hidup No. 115 Tahun 2003. Berdasarkan hasil analisis yang dilakukan pada daerah penelitian terdapat 4 titik dengan kategori memenuhi standar baku mutu (baik), 41 titik sumur dengan kategori cemar sedang, dan 10 titik dengan kategori cemar berat. Tingkat pencemaran pada daerah penelitian disebabkan oleh antropogenik dan batuan penyusun yang dominan bersifat permeabel. Tipe fasies air tanah yang mendominasi daerah penelitian adalah Magnesium Bikarbonat (Mg-HCO3) dan Calcium Chloride (Ca-Cl) dengan pengontrol utama air tanah berupa interaksi dengan batuan.

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Water is a resource for protecting the environment and meeting human needs, especially in DKI Jakarta and surrounding areas, which are experiencing an increase in population. Groundwater is a relevant source of clean water, considering the limited supply of a clean water systems. The quality of groundwater is an important issue due to functions in households, industries, and other needs. This research uses groundwater physical and chemical parameter data for 2023 including turbidity, dissolved solids (TDS), turbidity, pH, Iron (Fe), Manganese (Mn), Nitrate (NO3), and Nitrite (NO2), refers to Ministry of Health Regulation No. 02 of 2023 and uses the Pollution Index method which refers to the Minister of Environment Decree No. 115 of 2003. Based on the results of the analysis carried out in the research area, there are 4 points in with categories that meet the quality standards (good), 41 well points with moderately contamination, and 10 points with severe contamination. The level of pollution in the study area is caused by anthropogenic and permeable dominant constituent rock. The type of groundwater facies that dominate the study area are Magnesium Bicarbonate (Mg-HCO3) and Calcium Chloride (Cal-Cl) with the main controller of groundwater being the interaction with rock."

"Perkembangan Internet dan perangkat telepon pintar secara langsung dapat mempengaruhi masyarakat dalam menggunakan media sosial. Peningkatan pengguna media sosial dapat dimanfaatkan oleh Usaha Mikro Kecil dan Menengah (UMKM). Instagram sebagai platform komplementer dari e-marketplace berpeluang besar dalam meningkatkan pendapatan UMKM. Pada kenyataannya, di Indonesia Instagram for Business belum secara efektif digunakan oleh UMKM. Penelitian ini membangun model adopsi Instagram for Business berdasarkan model Stimulus-Organism-Response (S-O-R) oleh UMKM. Metodologi penelitian menggunakan kuantitatif dan kualitatif (mixed methods), data kuantitatif dikumpulkan melalui kuesioner kepada UMKM dan pembelinya di Instagram. Data kualitatif diperoleh melalui wawancara dengan dengan beberapa UMKM. Model S-O-R digunakan pada penelitian sebelumnya mengenai impulse buying di Facebook. Pada penelitian ini model S-O-R dikembangkan untuk menganalisis response dari stimulus, berupa impulse buying, kepada UMKM dan pembelinya, yang dianggap sebagai organism. Data responden yang terkumpul diolah menggunakan SmartPLS 3. Hasil dari pengujian model S-O-R menunjukkan bahwa respon impulse buying dari sudut pandang UMKM hanya dipengaruhi oleh stimulus yang memiliki pengaruh positif secara langsung pada perceived usefulness yaitu product availability, ease of use, visual appeal dan advertisement content yang berdampak pada adopsi serta impulse buying. Apabila dari sudut pandang pembeli, keseluruhan stimulus tersebut memiliki pengaruh positif terhadap perceived usefulness dan perceived enjoyment yang mengestimasi respon perilaku impulsif dari pembeli.

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The development of the Internet and smartphone devices can directly influence the public in using social media. Increased social media users can be utilized by Micro, Small and Medium Enterprises (MSMEs). Instagram as a complementary platform of e-marketplace has a great opportunity to increase MSME income. But in reality, MSMEs in Indonesia have not used Instagram for Business effectively. This study builds an Instagram for Business adoption model based on the Stimulus-Organism-Response (S-O-R) model by MSMEs. The research methodology uses quantitative and qualitative methods (mixed methods), quantitative data collected through questionnaires to MSMEs and buyers on Instagram. While qualitative data is obtained through interviews with several MSMEs. The S-O-R model was used in previous studies regarding impulse buying on Facebook. In this study the S-O-R model was developed to analyze responses from stimulus, in the form of impulse buying, to MSMEs and buyers, which are considered as organisms. The collected respondents' data were processed using SmartPLS 3. The results of the SOR model testing showed that the impulse buying response from the perspective of MSMEs was only influenced by stimuli that had a direct positive influence on perceived usefulness, namely product availability, ease of use, visual appeal and advertisement content have an impact on adoption and impulse buying. Whereas from the buyer's point of view, the overall stimulus has a positive influence on perceived usefulness and perceived enjoyment. Thus causing a response to impulsive behavior from buyers."

"Rogue Access Point (RAP) menjadi salah satu ancaman dalam keamanan jaringan Wireless Local Area Network. Salah satu RAP bermodel Unauthorized AP yaitu RAP terkoneksi dalam jaringan melalui kabel secara ilegal. Deteksi terhadap keberadaan RAP sudah banyak dikembangkan dengan berbagai metoda, menggunakan hardware atau software. Dengan sistem pendeteksi Rogue Access Point dan auto response, RAP akan secara otomatis dideteksi dan di blocking, sehingga akses RAP akan terhenti. Selain itu, Sistem Deteksi RAP menggunakan aplikasi berbasis web yang mempermudah network administrator dalam mengoperasikan aplikasi ini. Sistem ini menggunakan 2 parameter penting untuk mendeteksi yaitu IP dan MAC Address serta memberikan respon ke firewall untuk blocking. Dari hasil percobaan sistem pendeteksi RAP dan auto response, kehandalan sistem mendeteksi dan auto response RAP mencapai sebesar 92,5% hingga 100% pada 1 RAP, 88,75 % hingga 95% pada 2 RAP, 93,33% hingga 96,67% pada 3 RAP dan 95% hingga 97,5% pada 4 RAP dengan 2 variasi mode yaitu manual dan otomatis. Selain itu, waktu rata-rata pendeteksian dan auto response mencapai 6,97 detik (1 RAP) waktu tercepat dan 18,79 detik (4 RAP) waktu terlama.

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Rogue Access Point is one of network security threats in Wireless Local Area Network. One of type RAP are models Unauthorized AP which RAP may connect to the network cable or wireless illegally. RAP detection system has been developed with variety of methods, using hardware or software rogue access point detection system and auto response. The rogue access point will be automatically detected and blocked, so that RAP stops communicating with the network. In addition, RAP Detection system and auto response using the web-based application that facilitates the operation of the network administrator to configure. This system uses two important parameters to iterately detect the IP and MAC address and then give the "trigger" to the firewall for blocking action.

The results of experiment shows that system reliability to detect and to response against RAP reaches 92.5% to 100% on 1 RAP, 88.75% to 95% on 2 RAPs, 93.33% to 96.67% on 3 RAPs and 95 % to 97.5% on 4 RAPs with 2 variations modes : manual and automatic. and the average time detection and auto fastest response time reaches 6.97 sec (1 RAP) and the longest time to reaches 18.79 seconds (4 RAPs)."

"Sistem informasi keperawatan adalah salah satu elemen penting dalam pelaksanaan asuhan keperawatan. Sistem informasi keperawatan di Indonesia saat ini masih belum optimal dan umumnya masih bersifat manual. Riset dimulai dengan mengidentifikasi dan dilanjutkan pengembangan model sistem informasi manajemen keperawatan oleh Roro ("SIMPRO") yang disesuaikan dengan kondisi rumah sakit. Model "SIMPRO" yang telah dicustomization diujicobakan di dua rumah sakit dengan karakteristik yang berbeda yaitu rumah sakit swasta dan rumah sakit pemerintah. Setelah implementasi, dilaksanakan evaluasi dengan desain pre- post test without control group. Jumlah sampel dokumentasi yang digunakan untuk mengevaluasi kinerja "SIMPRO" adalah 219 dokumentasi dari setiap kelompok rumah sakit. Hasil riset menyampaikan ada perbedaan kinerja sebelum dan sesudah menggunakan "SIMPRO" yang diidentifikasikan dari perbedaan kualitas, kelengkapan, kesinambungan, bukti aspek legal dan fungsi membantu membuat keputusan (p=0.001). Ada perbedaan efisiensi waktu: baik di Rumah Sakit Ibu dan Anak Bunda Jakarta dan RS. Fatmawati (p= 0.01). Setelah menggunakan "SIMPRO" waktu yang diperlukan untuk melaksanakan dokumentasi di RS Fatmawati adalah 40.29 menit atau 25.27% dari total waktu dalam satu shift, sedangkan di RS Ibu dan Anak Bunda Jakarta membutuhkan waktu 24.62 menit atau 9.60% dari total waktu dalam satu shift. "SIMPRO" juga mempengaruhi efisiensi biaya, dimana dengan "SIMPRO" dokumentasi tidak setiap waktu harus dicetak. "SIMPRO" menjamin continuity of care dari asuhan keperawatan, sebagai bukti aspek legal, membantu mengambil keputusan dan meningkatkan keselamatan pasien. "SIMPRO" mengefisiensikan waktu dokumentasi sehingga waktu perawatan langsung ke pasien lebih optimal. "SIMPRO" juga meningkatkan edukasi kesehatan kepada pasien dan keluarga."Pada riset ini "SIMPRO" juga dapat meningkatkan peran manajer keperawatan dalam melaksanakan fungsi manajemen terutama pada peran pemberiaan motivasi, pengarahan, evaluasi dan monitoring terhadap pelaksanaan asuhan keperawatan. Dukungan aspek perawat, aspek manajemen dan teknik dapat mengoptimalkan kinerja "SIMPRO" sehingga dapat meningkatkan kualitas pelayanan keperawatan. Berdasarkan manfaat dari "SIMPRO", maka sistem ini dapat direkomendasikan untuk digunakan di setiap Rumah Sakit serta dapat mendukung peningkatan kualitas mutu pelayanan keperawatan dan kesehatan.

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Nursing Information System is an important element in nursing process. Current nursing system in Indonesia is still manual and less optimal. However, manual system has weaknesses, such as data slip or even lost, which may potentially lead a nurse in the legal risk. This research was an operational research. It was started by problem identification in order to identify needs for development of nursing information system. The second stage was Sistem Informasi Manajemen Keperawatan oleh Roro ("SIMPRO"), in other words, Development of Nursing Management Information System by Roro. "SIMPRO" has been adjusted and customized with the conditions of the hospitals. Coordination of management, human resources, and infrastructure as well as trainings and assistance were conducted prior to trial of "SIMPRO". Then, trial of "SIMPRO" was conducted at two hospitals, which represent the characteristics of both public and private hospitals. Pretest and posttest without control were done after the implementation. Numbers of nursing documentation as samples were 219 documentations from each hospital group. It was used to evaluate the effectiveness of system performance before and after the implementation of "SIMPRO". Result of the research was difference of performance before and after the implementation of "SIMPRO", which was identified by differences on quality, completeness, continuity, aspect legal function and decision support system (p=0.001). Hospital with good management and infrastructure supports demonstrated higher level of effectiveness than another one. There was difference on time effectiveness before and after the implementation of "SIMPRO", both at Bunda Hospital (p=0.010) and Fatmawati General Hospital (p=0.010). Duration of documentation at Fatmawati General Hospital was 40.29 minutes or about 25.27 percent of total duration in one shift. Meanwhile, duration of documentation at Bunda Hospital was 24.62 minutes or about 9.60 percent of total duration in one shift. "SIMPRO" affected cost effectiveness since no printed documentation produced. In addition, "SIMPRO" guaranteed the continuity of nursing process. Thus, it guaranteed legal aspect and enhanced patient safety as well. This research implicated to the enhancement of quality, completeness, relevance, aspect legal function and decision support system. It also implicated to time efficiency on documentation, thus direct care to patients can be more optimal. "SIMPRO" can enhance the quality of nursing care by supports of nurses, management and technical aspects.;Nursing Information System is an important element in nursing process. Current nursing system in Indonesia is still manual and less optimal. However, manual system has weaknesses, such as data slip or even lost, which may potentially lead a nurse in the legal risk. This research was an operational research. It was started by problem identification in order to identify needs for development of nursing information system. The second stage was Sistem Informasi Manajemen Keperawatan oleh Roro ("SIMPRO"), in other words, Development of Nursing Management Information System by Roro. "SIMPRO" has been adjusted and customized with the conditions of the hospitals. Coordination of management, human resources, and infrastructure as well as trainings and assistance were conducted prior to trial of "SIMPRO". Then, trial of "SIMPRO" was conducted at two hospitals, which represent the characteristics of both public and private hospitals. Pretest and posttest without control were done after the implementation. Numbers of nursing documentation as samples were 219 documentations from each hospital group. It was used to evaluate the effectiveness of system performance before and after the implementation of "SIMPRO". Result of the research was difference of performance before and after the implementation of "SIMPRO", which was identified by differences on quality, completeness, continuity, aspect legal function and decision support system (p=0.001). Hospital with good management and infrastructure supports demonstrated higher level of effectiveness than another one. There was difference on time effectiveness before and after the implementation of "SIMPRO", both at Bunda Hospital (p=0.010) and Fatmawati General Hospital (p=0.010). Duration of documentation at Fatmawati General Hospital was 40.29 minutes or about 25.27 percent of total duration in one shift. Meanwhile, duration of documentation at Bunda Hospital was 24.62 minutes or about 9.60 percent of total duration in one shift. "SIMPRO" affected cost effectiveness since no printed documentation produced. In addition, "SIMPRO" guaranteed the continuity of nursing process. Thus, it guaranteed legal aspect and enhanced patient safety as well. This research implicated to the enhancement of quality, completeness, relevance, aspect legal function and decision support system. It also implicated to time efficiency on documentation, thus direct care to patients can be more optimal. "SIMPRO" can enhance the quality of nursing care by supports of nurses, management and technical aspects.;Nursing Information System is an important element in nursing process. Current nursing system in Indonesia is still manual and less optimal. However, manual system has weaknesses, such as data slip or even lost, which may potentially lead a nurse in the legal risk. This research was an operational research. It was started by problem identification in order to identify needs for development of nursing information system. The second stage was Sistem Informasi Manajemen Keperawatan oleh Roro ("SIMPRO"), in other words, Development of Nursing Management Information System by Roro. "SIMPRO" has been adjusted and customized with the conditions of the hospitals. Coordination of management, human resources, and infrastructure as well as trainings and assistance were conducted prior to trial of "SIMPRO". Then, trial of "SIMPRO" was conducted at two hospitals, which represent the characteristics of both public and private hospitals. Pretest and posttest without control were done after the implementation. Numbers of nursing documentation as samples were 219 documentations from each hospital group. It was used to evaluate the effectiveness of system performance before and after the implementation of "SIMPRO". Result of the research was difference of performance before and after the implementation of "SIMPRO", which was identified by differences on quality, completeness, continuity, aspect legal function and decision support system (p=0.001). Hospital with good management and infrastructure supports demonstrated higher level of effectiveness than another one. There was difference on time effectiveness before and after the implementation of "SIMPRO", both at Bunda Hospital (p=0.010) and Fatmawati General Hospital (p=0.010). Duration of documentation at Fatmawati General Hospital was 40.29 minutes or about 25.27 percent of total duration in one shift. Meanwhile, duration of documentation at Bunda Hospital was 24.62 minutes or about 9.60 percent of total duration in one shift. "SIMPRO" affected cost effectiveness since no printed documentation produced. In addition, "SIMPRO" guaranteed the continuity of nursing process. Thus, it guaranteed legal aspect and enhanced patient safety as well. This research implicated to the enhancement of quality, completeness, relevance, aspect legal function and decision support system. It also implicated to time efficiency on documentation, thus direct care to patients can be more optimal. "SIMPRO" can enhance the quality of nursing care by supports of nurses, management and technical aspects.;Nursing Information System is an important element in nursing process. Current nursing system in Indonesia is still manual and less optimal. However, manual system has weaknesses, such as data slip or even lost, which may potentially lead a nurse in the legal risk. This research was an operational research. It was started by problem identification in order to identify needs for development of nursing information system. The second stage was Sistem Informasi Manajemen Keperawatan oleh Roro ("SIMPRO"), in other words, Development of Nursing Management Information System by Roro. "SIMPRO" has been adjusted and customized with the conditions of the hospitals. Coordination of management, human resources, and infrastructure as well as trainings and assistance were conducted prior to trial of "SIMPRO". Then, trial of "SIMPRO" was conducted at two hospitals, which represent the characteristics of both public and private hospitals. Pretest and posttest without control were done after the implementation. Numbers of nursing documentation as samples were 219 documentations from each hospital group. It was used to evaluate the effectiveness of system performance before and after the implementation of "SIMPRO". Result of the research was difference of performance before and after the implementation of "SIMPRO", which was identified by differences on quality, completeness, continuity, aspect legal function and decision support system (p=0.001). Hospital with good management and infrastructure supports demonstrated higher level of effectiveness than another one. There was difference on time effectiveness before and after the implementation of "SIMPRO", both at Bunda Hospital (p=0.010) and Fatmawati General Hospital (p=0.010). Duration of documentation at Fatmawati General Hospital was 40.29 minutes or about 25.27 percent of total duration in one shift. Meanwhile, duration of documentation at Bunda Hospital was 24.62 minutes or about 9.60 percent of total duration in one shift. "SIMPRO" affected cost effectiveness since no printed documentation produced. In addition, "SIMPRO" guaranteed the continuity of nursing process. Thus, it guaranteed legal aspect and enhanced patient safety as well. This research implicated to the enhancement of quality, completeness, relevance, aspect legal function and decision support system. It also implicated to time efficiency on documentation, thus direct care to patients can be more optimal. "SIMPRO" can enhance the quality of nursing care by supports of nurses, management and technical aspects."

"Sistem informasi keperawatan adalah salah satu elemen penting dalam pelaksanaan asuhan keperawatan. Sistem informasi keperawatan di Indonesia saat ini masih belum optimal dan umumnya masih bersifat manual. Riset dimulai dengan mengidentifikasi dan dilanjutkan pengembangan model sistem informasi manajemen keperawatan oleh Roro ("SIMPRO") yang disesuaikan dengan kondisi rumah sakit. Model "SIMPRO" yang telah dicustomization diujicobakan di dua rumah sakit dengan karakteristik yang berbeda yaitu rumah sakit swasta dan rumah sakit pemerintah. Setelah implementasi, dilaksanakan evaluasi dengan desain prepost test without control group. Jumlah sampel dokumentasi yang digunakan untuk mengevaluasi kinerja "SIMPRO" adalah 219 dokumentasi dari setiap kelompok rumah sakit. Hasil riset menyampaikan ada perbedaan kinerja sebelum dan sesudah menggunakan "SIMPRO" yang diidentifikasikan dari perbedaan kualitas, kelengkapan, kesinambungan, bukti aspek legal dan fungsi membantu membuat keputusan (p=0.001). Ada perbedaan efisiensi waktu: baik di Rumah Sakit Ibu dan Anak Bunda Jakarta dan RS. Fatmawati (p= 0.01). Setelah menggunakan "SIMPRO" waktu yang diperlukan untuk melaksanakan dokumentasi di RS Fatmawati adalah 40.29 menit atau 25.27% dari total waktu dalam satu shift, sedangkan di RS Ibu dan Anak Bunda Jakarta membutuhkan waktu 24.62 menit atau 9.60% dari total waktu dalam satu shift. "SIMPRO" juga mempengaruhi efisiensi biaya, dimana dengan "SIMPRO" dokumentasi tidak setiap waktu harus dicetak. "SIMPRO" menjamin continuity of care dari asuhan keperawatan, sebagai bukti aspek legal, membantu mengambil keputusan dan meningkatkan keselamatan pasien. "SIMPRO" mengefisiensikan waktu dokumentasi sehingga waktu perawatan langsung ke pasien lebih optimal. "SIMPRO" juga meningkatkan edukasi kesehatan kepada pasien dan keluarga.?Pada riset ini "SIMPRO" juga dapat meningkatkan peran manajer keperawatan dalam melaksanakan fungsi manajemen terutama pada peran pemberiaan motivasi, pengarahan, evaluasi dan monitoring terhadap pelaksanaan asuhan keperawatan. Dukungan aspek perawat, aspek manajemen dan teknik dapat mengoptimalkan kinerja "SIMPRO" sehingga dapat meningkatkan kualitas pelayanan keperawatan. Berdasarkan manfaat dari "SIMPRO", maka sistem ini dapat direkomendasikan untuk digunakan di setiap Rumah Sakit serta dapat mendukung peningkatan kualitas mutu pelayanan keperawatan dan kesehatan.

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Nursing Information System is an important element in nursing process. Current nursing system in Indonesia is still manual and less optimal. However, manual system has weaknesses, such as data slip or even lost, which may potentially lead a nurse in the legal risk. This research was an operational research. It was started by problem identification in order to identify needs for development of nursing information system. The second stage was Sistem Informasi Manajemen Keperawatan oleh Roro ("SIMPRO"), in other words, Development of Nursing Management Information System by Roro. "SIMPRO" has been adjusted and customized with the conditions of the hospitals. Coordination of management, human resources, and infrastructure as well as trainings and assistance were conducted prior to trial of "SIMPRO". Then, trial of "SIMPRO" was conducted at two hospitals, which represent the characteristics of both public and private hospitals. Pretest and posttest without control were done after the implementation. Numbers of nursing documentation as samples were 219 documentations from each hospital group. It was used to evaluate the effectiveness of system performance before and after the implementation of "SIMPRO". Result of the research was difference of performance before and after the implementation of "SIMPRO", which was identified by differences on quality, completeness, continuity, aspect legal function and decision support system (p=0.001). Hospital with good management and infrastructure supports demonstrated higher level of effectiveness than another one. There was difference on time effectiveness before and after the implementation of "SIMPRO", both at Bunda Hospital (p=0.010) and Fatmawati General Hospital (p=0.010). Duration of documentation at Fatmawati General Hospital was 40.29 minutes or about 25.27 percent of total duration in one shift. Meanwhile, duration of documentation at Bunda Hospital was 24.62 minutes or about 9.60 percent of total duration in one shift. "SIMPRO" affected cost effectiveness since no printed documentation produced. In addition, "SIMPRO" guaranteed the continuity of nursing process. Thus, it guaranteed legal aspect and enhanced patient safety as well. This research implicated to the enhancement of quality, completeness, relevance, aspect legal function and decision support system. It also implicated to time efficiency on documentation, thus direct care to patients can be more optimal. "SIMPRO" can enhance the quality of nursing care by supports of nurses, management and technical aspects."

"Air bersih menjadi kebutuhan mendasar bagi seluruh manusia. Analisis kualitas air tanah khususnya di wilayah Kota Jakarta Timur dan sekitarnya dianggap penting mengingat wilayah ini di dominasi oleh pemukiman, industri, pergudangan dimana air tanah masih digunakan untuk keperluan sehari hari. Berdasarkan kondisi geologinya, wilayah penelitian tersusun atas sedimen klastik dan tuf yang dikelompokan menjadi dua tipe endapan, yaitu endapan aluvium dan endapan kipas aluvium. Akuifer berada di kedalaman 9-40 m dimana bagian selatan merupakan wilayah imbuhan, dan utara adalah wilayah luahan. Status mutu air pada pada akuifer bebas wilayah Jakarta Timur dan sekitarnya sekitar 4,5% kategori baik sekali-memenuhi baku mutu, 59% kategori baik-cemar ringan, dan 36,5% kategori sedang-cemar sedang. Nilai pH yang rendah di bagian selatan wilayah penelitian berasal dari limbah domestik yang mengandung konsentrasi ion H+ (hidrogen) lebih tinggi, sedangkan pada bagian utara, nilai pH yang tinggi menandakan pencemar berasal dari limbah industri/pergudangan yang mengandung kosentrasi ion OH- (hidroksil) lebih tinggi. Berdasarkan kandungan NO3- (nitrat), Kecamatan Ciracas bagian selatan menjadi titik dengan konsentrasi nitrat tertinggi yang disebabkan oleh penggunaan urea yang tinggi.

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Clean water is a basic need for all humans. Analysis of groundwater quality, especially in East Jakarta City and surrounding areas is considered important given the region is dominated by settlements, industry, warehousing where ground water is still used for daily needs. Based on geological conditions, the study area is composed of clastic and tuff sediments which are grouped into two types of deposits, namely alluvium deposits and alluvium fan deposits. The aquifer is at a depth of 9-40 m where the southern part is the recharge area, and the north is the discharge area. The status of water quality in the free aquifer of East Jakarta and surrounding areas is around 4.5% in the excellent category-fulfilling the quality standard, 59% in the good-light polluted category, and 36.5% in the medium-moderate polluted category. The low pH value in the southern part of the study area comes from domestic wastes containing higher concentrations of H+ (hydrogen) ions, whereas in the north, high pH values indicate pollutants originating from industrial/warehousing waste containing higher concentrations of OH- (hydroxyl) ions. Based on the NO3- content (nitrate), Ciracas Subdistrict in south became the point with the highest nitrate concentration caused by the high use of urea."

"Semakin pesatnya perkembangan suatu wilayah akan diimbangi dengan meningkatkanya kebutuhan air bersih untuk memenuhi kebutuhan sehari-hari. Selain kebutuhan air bersih, potensi terjadinya pencemaran terhadap air di permukaan atau di bawah permukaan juga semakin tinggi karena semakin banyak aktivitas manusia yang dilakukan. Daerah Jabodetabek, terutama Jakarta, masih sangat bergantung terhadap akuifer dangkal atau akuifer tidak tertekan untuk memenuhi kebutuhan air bersih. Kondisi airtanah pada akuifer dipengaruhi oleh faktor geologi (iklim, litologi, hidrologi, dsb) serta faktor manusia (aktivitas industri, limbah, urbanisasi, dsb). Perlu dilakukan kajian dan evaluasi mengenai kondisi atau tingkat kerentanan airtanah sehingga dapat diketahui tindakan yang tepat sesuai tingkatannya. Metode Simple Vertical Vulnerability (SVV) dapat digunakan untuk mengevaluasi kondisi kerentanan airtanah suatu wilayah berdasarkan batuan penyusun zona tak jenuh, kedalaman muka airtanah, dan besarnya imbuhan airtanah. Hasil penelitian menunjukkan bahwa lapisan tak jenuh daerah penelitian tersusun atas dua (2) lapisan. Lapisan pertama tersusun atas tanah berbutir pasir dengan sedikit kerikil – kerakal, pasir dengan sedikit lempung, batupasir butir halus, dan batulempung. Lapisan kedua tersusun atas batupasir berbutir sedang dan batulempung lanauan. Terdapat empat (4) zona kerentanan airtanah pada daerah penelitian, yaitu zona kerentanan sangat tinggi (3,54%), zona kerentanan tinggi (66,83%), zona kerentanan sedang (28,66%), dan zona kerentanan rendah (0,97%). Litologi penyusun lapisan tak jenuh menjadi faktor utama dalam penentuan kelas kerentanan airtanah. Semakin halus ukuran butir litologi, maka proses infiltrasi semakin lama (mencapai 10 – 25 tahun) dan proses retardasi serta eliminasi menjadi semakin efektif. Hal tersebut mengakibatkan semakin rendahnya tingkat kerentanan airtanah pada daerah dengan litologi berbutir halus.

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The rapid development of an area will be followed by an increasing demand for clean water to fulfill daily needs. In addition, the potential for contamination of water on the surface or in the subsurface is also getting higher due to the increasing number of human activities carried out. The Jabodetabek area, especially Jakarta, still relies heavily on shallow aquifers or unconfined aquifers to fulfill clean water needs. Groundwater conditions in aquifers are influenced by geological factors (climate, lithology, hydrology, etc.) and human factors (industrial activities, waste, urbanization, etc.). It is necessary to study and evaluate the condition or the level of groundwater vulnerability so that appropriate action can be taken according to its level. The Simple Vertical Vulnerability (SVV) method can be used to evaluate the groundwater vulnerability condition of an area based on the rocks that make up the unsaturated zone, the depth of the groundwater table, and the amount of groundwater recharge. The results showed that the unsaturated layer in the study area consisted of two (2) layers. The first layer is composed of sand with a little pebbles, sand with a little clay, fine-grained sandstone, and claystone. The second layer is composed of medium-grained sandstone and silt claystone. There are four (4) groundwater vulnerability zones in the research area, namely very high vulnerability zone (3,54%), high vulnerability zone (66,83%), medium vulnerability zone (28,66%), and low vulnerability zone (0,97%). The lithology of the unsaturated layer is the main factor in determining the class of groundwater vulnerability. The finer the grain size of the lithology, the longer the infiltration process (up to 10-25 years) and the more effective the retardation and elimination processes. This results in a lower level of groundwater vulnerability in areas with fine-grained lithology."

"Kota Jakarta terus mengalami peningkatan jumlah penduduk yang pesat setiap tahunnya. Seiring dengan tingginya aktivitas manusia, hal tersebut dapat berdampak pada ketersediaan air bersih, khususnya di Jakarta bagian Selatan yang memiliki banyak objek wisata serta kawasan pusat bisnis perkantoran. Apalagi, sebagian besar dari seluruh penduduk kota Jakarta masih sangat bergantung pada air tanah yang berasal dari Cekungan Air Tanah (CAT) Jakarta sebagai sumber utama. Selain pengaruh aktivitas manusia, kondisi air tanah pada sebuah akuifer juga dipengaruhi oleh faktor geologi yang dapat mengubah karakteristik, potensi, dan dinamika air tanah melalui litologi penyusun lapisan akuifer dan struktur geologinya. Penelitian ini dilakukan untuk menganalisis karakteristik litologi batuan penyusun serta tingkat kerentanan air tanah pada akuifer bebas, dengan melakukan studi rentan air tanah menggunakan metode Simple Vertical Vulnerability (SVV) berdasarkan tiga variabel, yaitu material zona tak jenuh, kedalaman muka air tanah, dan jumlah imbuhan air tanah. Selain itu, analisis interpolasi juga dilakukan untuk mencari nilai pada beberapa variabel yang nantinya akan didapatkan hasil analisis terkait tingkat kerentanan air tanah serta hubungannya dengan litologi batuan penyusun pada lokasi yang diuji. Berdasarkan hasil penelitian, Cekungan Air tanah (CAT) Jakarta bagian Selatan memiliki empat zona kerentanan air tanah, yaitu zona kerentanan tinggi (36 km²), zona kerentanan sedang (554 km²), zona kerentanan rendah (212 km²), dan zona kerentanan sangat rendah (6 km²). Pada daerah penelitian, lapisan zona tak jenuh terdiri dari dua lapisan. Lempung, lanau pasiran, dan pasir halus membentuk lapisan pertama, sementara pasir berbutir sedang hingga kerikil dan lempung membentuk lapisan kedua. Litologi lapisan tak jenuh menjadi kunci awal dalam menentukan tingkat air tanah intrinsik terhadap kerentanan. Ketika ukuran butir litologi semakin halus maka proses infiltrasi akan semakin lama sehingga akan mengalami perlambatan dan pengurangan kontaminan pada air.

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The city of Jakarta continually experiences rapid population growth every year. Along with the high level of human activity, this can have an impact on the availability of clean water, especially in the southern part of Jakarta, which is home to numerous tourist attractions and central business and office areas. Moreover, a significant portion of Jakarta's population still heavily relies on groundwater from the Jakarta Aquifer System as their primary water source. In addition to the influence of human activities, the condition of groundwater within an aquifer is also influenced by geological factors, which can alter the characteristics, potential, and dynamics of groundwater through the lithology of the aquifer's composing layers and its geological structure. This has the potential to create imbalances in the management of groundwater resources. This research is conducted to analyze the characteristics of the lithology of the rock formations and the vulnerability of groundwater in unconfined aquifers. It involves a study of groundwater vulnerability using the Simple Vertical Vulnerability (SVV) method based on three variables: the unsaturated zone material, the depth of the groundwater table, and the volume of groundwater recharge. Additionally, interpolation analysis is carried out to determine values for several variables. These values will subsequently provide an analysis of groundwater vulnerability and its relationship with the lithology of the rock formations at the study location. Based on the research findings, the South Jakarta Aquifer Basin (CAT) has four groundwater vulnerability zones, namely high vulnerability zone (36 km²), moderate vulnerability zone (554 km²), low vulnerability zone (212 km²), and very low vulnerability zone (6 km²). In the research area, the unsaturated zone consists of two layers. Clay, sandy loam, and fine sand form the first layer, while medium-coarse sand to gravel and clay form the second layer. The lithology of the unsaturated zone is the initial key factor in determining the intrinsic groundwater vulnerability. When the grain size of the lithology becomes finer, the infiltration process will take longer, resulting in a slowdown and reduction of contaminants in the water.

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