Judul: Evaluation Of Dam Safety Based On Risk Indexing Tools On Jatiluhur Dam, West Jawa
Abstrak: Indonesia has high water surface potential. It is proved by a lot of big rivers in Indonesia. In order to utilize its water potential optimally, it need a water conservation structure. Generally, the water conservation structure is a dam because of its many functions. There are some big dams in Indonesia, one of them was Ir. Juanda dam or Jatiluhur Dam. The main purpose of the dam is to provide water irrigation . Nowadays dam has many functions, such as power supply to produce electricity, reservoir, recreation and flood control. To fullfill those functions dam must be maintain regularly. The objectives of the research were to identify the factors which affect dam safety and to evaluate dam safety by risk indexing tools. Risk indexing tools is a method for making priority scales of maintenance, improvement and evaluation of dam that has limited instrumentation, based on its actual condition and performance. There were six main steps of this research. The steps were to analyse (1) vulnerability factors, (2) intrinsic factors, (3) external factors, (4) adequacy factors, (5) the stage of initial importance and (6) the value of total risk index. All of the steps were done in a sequence from step one to the last steps. The result showed that Jatiluhur dam was still in safe condition and can operate as its planed. This was proven based on several factors values such as Idam=750, IRtot=127,22, Nsafe=83,04. The conclusion of this study was Jatiluhur dam’s safety was in satisfied category with Nsafe value more than 75.
Keyword: dam load, dam safety, Jatiluhur dam, risk indexing tools

Judul: Model for sustainable dam development planning: case study of jatigede dam development
Abstrak: Model for sustainable dam development planning is an important process to plan sustainable control on social problems in construction stage and to plan sustainable achievement in dam optimal function along dam life time. Dam development is needed because of unevenly distribution of water in time and space, so then it is possible that flood occur in a certain place but drought occur in other place in the same time, vice versa. Dam development can reduce risk of flood and drought through a reservoir operation by using less water from reservoir but much for storing water in rainy season and using some major part of it in dry season. Jatigede dam planning and construction becomes the site for the case study in this research. There are three items becomes the focus of this research i.e. sedimentation, water balance and land acquisition. These factors are considered as the most important factors in planning a dam. Because of that, the model of dam planning contains of sub model of sedimentation and sub model of water balance, and then it will be integrated with study on land acquisition. The submodels will be run in three conditions i.e. the first is the condition based on data in original design, the second condition is based on present situation on site, the last condition is the condition on which the optimal function of the dam can be maintained during dam life time. Study on land acquistion is run on the land belong to the people and forest land. High sediment rates in catchment area of Jatigede dam in original design and moreover in present condition, makes the reservoir support on dam optimal function fails to survive along the dam life time. After that, in water balance analysis, this sediment situation influences the reliability of water availability especially for irrigation in Rentang Irrigation area. There are problems on land acquisition such as illegal buildings on land, resettlement and claims on previous land acquisition activities in the past.Through the sub models running, optimal functions of Jatigede dam can be attained by reducing the current value to a certain allowable value of sediment rates, sediment control in steps along dam life time and using of a certain variety of paddy which has low need of water. Solution on land acquisition in Jatigede dam, especially for the land owned by people, clear and certain policy is needed, besides strong support on program and financial for resettlement. Efficiency on time allocation and steps in usage of forest land procedures is urgently needed, if not, reservoir innundation which is scheduled in October 2013 will be in danger. Recommendation on dam planning and recommended activities in dam planning, building and operating, are important values to be used for future dam planning.
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Judul: Penggulung daun Sylepta sp. (Lepidoptera: Crambidae) pada Boehmeria minuticymosa (Urticaceae):
Abstrak: Sylepta sp. (Lepidoptera: Crambidae) merupakan kelompok hama yang bersifat polifag. Larva hama ini menyebabkan daun menggulung. Salah satu tanaman inang hama ini adalah gulma Boehmeria minuticymosa N. Acharya & Yonek (Urticaceae). Larva sering diparasit oleh beberapa parasitoid, sehingga bisa bermanfaat sebagai inang alternatif parasitoid dalam pengendalian biologi. Tujuan dari penelitian ini yaitu mengamati beberapa aspek biologi hama ini dan parasitoidnya pada B. minuticymosa. Penelitian dilaksanakan di Laboratorium Biosistematika Serangga, Departemen Proteksi Tanaman, Fakultas Pertanian, Institut Pertanian Bogor, dari bulan Februari hingga Agustus 2018. Larva Sylepta sp. diperoleh dari lapangan dan dipelihara di laboratorium. Aspek biologi yang diamati meliputi jumlah instar larva, stadium larva dan pupa, lama hidup imago, dan parasitoidnya. Hasil penelitian menunjukkan bahwa Sylepta sp. memiliki empat instar. Rata-rata stadium larva dan pupa adalah 19.59 dan 8.33 hari. Larva menggulung daun dan memakannya dari bagian dalam daun. Pupa berwana cokelat gelap. Lama hidup imago jantan dan betina adalah 4.18 dan 6.09 hari. Parasitoid dari hama ini termasuk Ordo Hymenoptera, Famili Braconidae dan Bethylidae (parasitoid larva) dan Chalcididae (parasitoid pupa).
Keyword: gulma, hama, Hymenoptera, serangga, Urticaceae