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Telah dilakukan penelitian mengenai hubungan kuantitatif antara jumlah larva dengan kelimpahan teritip Balanus amphitrite di Saluran Air Masuk PLTU Suralaya Tahun 2008--2009. Penelitian tersebut bertujuan untuk mengetahui Jumlah larva, kepadatan/kelimpahan dan hubungan kuantitatifnya selama 1 tahun yang dimulai dari bulan April 2008 -- Maret 2009. Pengambilan sampel dilakukan sebanyak satu kali dalam 1 bulan dengan jumlah sampel sebanyak 121 sampel larva dan 11 sampel teritip yang berasal dari pelat besi. Sampel yang di dapat di dihitung dan di analisis secara manual pencacahan dan mencari hubungan keduanya menggunakan korelasi Spearman. Pengambilan sampel larva dilakukan sebanyak 3 kali pengulangan menggunakan botol Nansen dan dua kali pengulangan dengan Plankton-net dengan kedalaman yang berbeda 1 m, 3 m dan 6 m , sedangkan pengambilan sampel teritip dilakukan sebanyak satu kali setiap bulan. Hasil penelitian menunjukkan terdapat hubungan positif rs = 0,709 antara jumlah larva dengan kelimpahan teritip Balanus amphitrite . Jumlah larva dan kelimpahan teritip terbesar terjadi pada bulan September dan terkecil pada bulan Juli. Jumlah larva terbesar mencapai 336300 individu/m3 sedangkan kelimpahan terbesar mencapai 1088 individu/m2 pada pelat A dan 624 individu/m2 pada pelat B.

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An investigation on the quantitative relationship between the amount of the abundance of barnacle larvae Balanus amphitrite in Suralaya Sign Waterways Year 2008 2009. The study aims to find out the number of larvae, the density abundance and its quantitative relationship for one year starting in April 2008 March 2009. Sampling was conducted once a month with a total sample of 121 samples and 11 samples of barnacle larvae originating from the metal plate. In the sample can be calculated and analyzed manually enumeration and find their relationship using Spearman correlation. Larval sampling were conducted three times repetition using Nansen bottles and two repetitions with the Plankton net with a different depth 1 m, 3 m and 6 m , whereas barnacle sampling conducted once every month. The results showed a positive relationship rs 0.709 between the abundance of barnacle larvae Balanus amphitrite . The number and abundance of barnacle larvae in September, biggest and smallest in July. The largest number of larvae reached 336300 individu m3 while achieving the greatest abundance 1088 individu m2 on the plate A and 624 individu m2 on the plate B.

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Peningkatan jumlah penduduk di Jakarta mengakibatkan bertambahnya kebutuhan akan pemukiman dan fasilitas pendukungnya. Untuk memenuhi kebutuhan akan pemukiman tersebut dilakukan dengan berbagai cara dari pemanfaatan lahan terbuka hingga memanfaatkan sempadan sungai, khususnya Sungai Ciliwung. Pemanfaatan sempadan sungai ini mengakibatkan hilangnya kealamiahan sempadan sungai sehingga berubahlah kondisi hidrolis dari Sungai Ciliwung. Perubahan-peruhanan sempadan sungai ini akan sangat berpengaruh pada koefisien kekasaran saluran. Koefisien kekasaran sungai ini merupakan suatu nilai yang dipengaruhi oleh ketidakteraturan saluran, variasi penampang saluran, pengaruh penghalang, vegetasi, dan derajat belokan sungai. Perubahan koefisien kekasaran saluran akan mempengaruhi kecepatan aliran. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh karakteristik sempadan sungai terhadap koefisien kekasaran alur sungai yang mempengaruhi kecepatan aliran yang akan mempengaruhi waktu tempuh puncak banjir. Pergeseran waktu tempuh puncak banjir dapat dilihat pada karakteristik hidrograf banjir rencana Sungai Ciliwung di ruas Bendung Katulampa hingga Pintu Air Manggarai. Identifikasi kondisi sempadan Sungai Ciliwung di ruas tersebut dilakukan dengan cara penelusuran sungai. Aplikasi HEC-RAS digunakan untuk mendapatkan hidrograf banjir rencana di Pintu Air Manggarai. Untuk mengetahui pengaruh karakteristik sempadan sungai terhadap koefisien kekasaran alur, simulasi HEC-RAS dilakukan dengan menggunakan kondisi eksisting dan Natural condition untuk membandingkan hidrograf kedua kondisi tersebut. Dari simulasi HEC-RAS didapatkan hasil berupa nilai debit aliran perjamnya. Berdasarkan hasil simulasi tersebut dapat disimpulkan bahwa terdapat penurunan debit puncak banjir dan lebih panjangnya waktu puncak banjir yang terjadi.

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ABSTRACT<>br> Increasing population in Jakarta leads to increased needs of settlement and its supporting facilities. To compensate, various ways are being done from utilization of open area to the riparian, especially in Ciliwung River. This utilization results in the loss of riparian natural ability that changes the hydraulic condition of Ciliwung River. These riparian changes will affect significantly to roughness coefficient. The roughness coefficient is a value that is affected by channel irregularity, variation of cross section, effect of obstraction, vegetation, and degree of meandering. Change of roughness coefficient will influence the velocity of the stream. The purpose of this research is to determine the effect of riparian characteristics to the roughness coefficient that affects the stream velocity, which has impact on the peak time. The peak time shift can be seen on flood hydrograph characteristics of Ciliwung River on Katulampa Weir until Manggarai sluice gate. Identification of Ciliwung riparian condition at that segment is conducted by river routing. HEC RAS application is used to get design flood hydrograph at Manggarai water gate. To get to know the influence of riparian characteristics to roughness coefficient, HEC RAS simulation is done using existing and natural condition to compare the hydrograph of those two conditions. From the simulation, the result is the value of flow rate per hour. Based on the simulation result, it can be concluded that there is a lower peak discharge and lengthened the duration of discharge.

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Air sungai di wilayah DKI Jakarta memiliki kandungan pencemar organik dan anorganik yang tinggi. Berdasarkan pemantauan yang dilakukan DLH DKI Jakarta pada tahun 2018- 2022, parameter pencemar utama yang mencemari sungai adalah fecal coliform, total coliform, klorin bebas, BOD, hidrogen sulfida, COD, dan amonia. Hidrogen sulfida dan amonia merupakan pencemar yang dapat menimbulkan bau di air sungai, sehingga dapat mengganggu kenyamanan di ruang terbuka. Melalui penelitian ini, persepsi pengunjung taman terhadap timbulan bau dan kualitas air di saluran air Tebet Eco Park dapat diketahui. Persepsi pengunjung didapatkan melalui kuesioner, pengujian timbulan bau di saluran air dilakukan dengan menggunakan SNI 06-6860-2002, dan pengujian pH, suhu, TDS, COD, amonia, total coliform dilakukan berdasarkan SNI Kualitas Air dan Air Limbah. Hasil kuesioner persepsi pengunjung menunjukkan bahwa 43% pengunjung tidak mencium bau, sedangkan 57% pengunjung yang lain mencium bau dalam intensitas yang berbeda. Dari hasil pengujian kualitas air menunjukkan bahwa parameter COD, amonia, dan total coliform tidak memenuhi standar baku mutu kelas 4 dari Peraturan Pemerintah Republik Indonesia Nomor 22 Tahun 2021 dan standar WHO dengan masing- masing parameter memiliki konsentrasi tertinggi sebesar 98 mg/L, 13 mg/L, dan 9.200.000 MPN/100 mL. Rekomendasi untuk meningkatkan kualitas air diberikan melalui perancangan sistem pengolahan air yang terdiri dari Bioretention Basin, Cascade Aerator, dan Constructed Wetland yang mampu menyisihkan konsentrasi COD, amonia, dan total coliform masing-masing sebesar 96,72%, 99,25%, dan 99,58%. ......The river water in Jakarta has high levels of organic and inorganic pollutants. Based on monitoring conducted by DLH DKI Jakarta from 2018-2022, the main pollutant contaminating the rivers are fecal coliform, total coliform, free chlorine, BOD, hydrogen sulfide, COD, and ammonia. Hydrogen sulfide and ammonia are pollutants that can cause odor in the river water and might affecting comfort in open spaces. Through this study, the perception of park visitors regarding odor and the water quality in the Tebet Eco Park waterways can be understood. Visitor perceptions were obtained through questionnaires, while odor tests in the waterways were conducted using SNI 06-6860-2002, and tests for pH, temperature, TDS, COD, ammonia, and total coliform were conducted based on SNI Water and Wastewater Quality Standards. The results of the visitor perception questionnaires showed that 43% of visitors did not detect any odor, while 57% of visitors detected odors of varying intensity. The results of the water quality tests showed that COD, ammonia, and total coliform did not meet the class 4 quality standards of Peraturan Pemerintah Republik Indonesia Nomor 22 Tahun 2021 and WHO Standards, with the highest concentrations for each parameter being 98 mg/L, 13 mg/L, and 9.200.000 MPN/100 mL, respectively. Recommendations for improving water quality were provided through the design of a water treatment system consisting of a Bioretention Basin, Cascade Aerator, and Constructed Wetland, which are capable of reducing COD, ammonia, and total coliform concentrations by 96.72%, 99.25%, and 99.58%, respectively.

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Penelitian ini menggambarkan tentang efektivitas kerjasama yang dibentuk oleh Indonesia, Malaysia dan Singapura di dalam pengamanan selat Malaka setelah terjadinya peristiwa 11 September 2001 hingga tahun 2010 yang telah mengubah ancaman dan tantangan keamanan di kawasan ini. Penelitian ini merupakan penelitian yang bersifat kuantitatif dengan data sekunder. Hasil penelitian menyimpulkan bahwa efektivitas kerjasama yang dibentuk oleh littoral states dalam pengamanan selat Malaka ini sangat di pengaruhi oleh banyak alasan sehingga bentuk bentuk kerjasama di Asia tenggara antara littoral states terbatas bahkan hingga pasca peristiwa 11 September 2001. Secara historis perompakan dan terorisme maritim memang bukan merupakan masalah yang dianggap penting. Akibatnya ada keengganan untuk bekerjasama pada isu tersebut. Adanya peristiwa 11 September 2001 dan beberapa kejadian lain yang berhubungan dengan terorisme akhirnya membuat littoral states mengubah persepsinya pada berbagai masalah yang sebelumnya diyakini bukan sebagai ancaman pada masa lalu. sehingga sangat penting untuk menginterpretasikan kerjasama keamanan maritim secara lebih luas sehingga diharapkan dapat menjawab tantangan dan dinamisme perkembangan maritim dalam batas teritorial setiap negara

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This study illustrates the effectiveness of cooperation established by Indonesia, Malaysia and Singapore in the Malacca Strait security after the event of 11 September 2001 that have changed the threats and security challenge in the region. This research is a quantitative study with secondary data. Study concluded that the effectiveness of cooperation established by littoral states in securing the Malacca strait is influenced by many reasons, so the form of cooperation in Southeast Asia between the littoral states is limited even after the events of 11 September 2001. Historically piracy and maritime terrorism is not an issue that is important. As a result there is a reluctance to cooperate on the issue. The existence of the event of 11 September 2001 and some other events related to terrorism ultimately make littoral states to change their perception on various issues that were previously believed to be not as a threat in the past. So it is important to interpret maritime security cooperation more broadly so that is expected to meet the challenges and dynamism in the development of maritime territorial limits of each country.

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Abstract
This study illustrates the effectiveness of cooperation established by Indonesia, Malaysia and Singapore in the Malacca Strait security after the event of 11 September 2001 that have changed the threats and security challenge in the region. This research is a quantitative study with secondary data. Study concluded that the effectiveness of cooperation established by littoral states in securing the Malacca strait is influenced by many reasons, so the form of cooperation in Southeast Asia between the littoral states is limited even after the events of 11 September 2001. Historically piracy and maritime terrorism is not an issue that is important. As a result there is a reluctance to cooperate on the issue. The existence of the event of 11 September 2001 and some other events related to terrorism ultimately make littoral states to change their perception on various issues that were previously believed to be not as a threat in the past. So it is important to interpret maritime security cooperation more broadly so that is expected to meet the challenges and dynamism in the development of maritime territorial limits of each country.

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Pekerjaan konstruksi saluran air adalah pekerjaan yang sangat kompleks dan harus direncanakan, dikelola dengan baik, juga dengan memperhatikan semua aspek, terutama mengenai masalah K3 pekerja yang bersangkutan Kemudian dibuat standar penerapan K3 yang sudah tercantum dalam Peraturan Menteri Pekerjaan Umum No. 5 Tahun 2014 sebagai sarana pendampingan dari merencanakan semua aspek kebutuhan K3 dalam proyek konstruksi air, namun Dalam praktiknya, K3 sering digunakan sebagai "prioritas nomor dua" dalam proyek, sehingga kebutuhan K3 harus ditinjau ulang. Penelitian ini telah melalui validasi ahli dan analisis proyek masa lalu untuk memenuhi Standarisasi K3 yang baik dan benar.
Drainage construction work is a very complex job and must be planned, managed properly, also with attention to all aspects, especially regarding the OSH issues of the workers concerned Then a standard for the application of K3 is made that has been stated in the Regulation Minister of Public Works No. 5 of 2014 as a means of assistance from planning all aspects of K3 needs in water construction projects, however In practice, OSH is often used as a "number two priority" in projects, so the need for K3 must be reviewed. This research has been through expert validation and analysis of past projects to meet Good and correct K3 standardization.

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Water control and management have been fundamental to the building of human civilisation. In Europe, the regulation of major rivers, the digging of canals and the wetland reclamation schemes from the 16th to 19th centuries, generated new typologies of waterscapes with significant implications for the people who resided within them. This book explores the role of waterways as a form of heritage, culture, and sense of place and the potential of this to underpin the development of cultural tourism. With a multidisciplinary approach across the social sciences and humanities, chapters explore how the control and management of water flows are among some of the most significant human activities to transform the natural environment. Based upon a wealth and breadth of European case studies, the book uncovers the complex relationships that we have with waterways, the ways that they have been represented over recent centuries and the ways in which they continue to be redefined in different cultural contexts. Contributions recognise not only valuable assets of hydrology that are at the core of landscape management, but also more intangible aspects that matter to people, such as their familiarity, affecting what is understood as the fluvial sense of place. This highly original collection will be of interest to those working in Cultural Tourism, Cultural Geography, Heritage Studies, Cultural History, Landscape Studies and Leisure Studies.