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"ABSTRAKPenelitian ini mencoba memformulasikan kebijakan pengelolaan Daerah AliranSungai (DAS) Citarum dalam kerangka pengendalian banjir di KabupatenBandung. Model dinamis digunakan untuk menggambarkan sistem danmengetahui faktor pengungkit (leverage factor) serta kebijakan yang diambiluntuk mengoptimalkan pengelolaan DAS Citarum dalam pengendalian banjir.Salah satu temuan penting dalam dalam penelitian ini adalah Pengaruh SubsistemGangguan Lingkungan terhadap subsistem lain sangat kuat. Sebelum anggaransemakin dominan, Gangguan Lingkungan mampu menurunkan Area TerbukaHijau ke level sangat rendah. Selain itu, Gangguan Lingkungan juga mendorongpenurunan Kapasitas Citarum sekalipun Anggaran terus membesar. PeranPendidikan saat ini belum mampu mereduksi tingkat gangguan lingkungan.

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ABSTRACTThis study is to formulate a Riverbasin ( DAS ) Management Policy in theframework of Citarum flood control in Bandung Regency. A System Dynamicsmodel is used to describe the system and to identify the leverage factors as wellas alternative policies for optimizing the management of the Citarum RiverbasinFlood Control. The most important finding in this study is the very strong impactof Environmental Disturbance Subsystem to other subsystems. TheEnvironmental Disturbance reduces Green Open Areas to a very low level beforeBudget dominates it in the system. In addition, the Environmental Disturbancealso push down the Citarum Capacity despite the Budget rises continously. Therole of the existing education among the society has not been able to reduce thelevel of the Environmental Disturbance."

"This paper aims to enlighten some properties of epikrast drainage system due to various local conditions. Karst area covered in this paper is the western part of Mount Sewu extending nearly 2/3 of the karstified area. It belongs to Gn Kidul Regency. Variables identified and measured in the field include secondary porosity and the general feature of geomorphological and hydrological condition. Laboratory analysis was also conducted to acquire data of rock, unfilled material porosity and texture of unfilled material. Drainage system of Mt Sewu karst varies in some localities. The properties of epikarst drainage system are seemingly governed by lithology and geological structure. Since lithology and geological structure are controls of karst type, the drainage system variation is related to the karst type as well."

"One of strategic watersheds in Indonesia is the Ciliwung watershed. The rapid growth of development in this watershed has resulted in reduced forested lands and water catchment areas. The critical point is when the upstream area as a buffer zone also experiences uncontrolled land conversion for various purposes. Indonesia Law Number 41 of 1999 concerning Forestry, Article 18 contains a mandate for the Government to determine and to maintain the adequacy of forest cover in each watershed. This research seeks to understand the condition of rehabilitation and deforestation of forested land in Bogor Regency as the upstream of the Ciliwung watershed which affects its downstream water system in DKI Jakarta Province. By applying system dynamics modelling, it is expected that an ideal scenario of rehabilitation which the government must undertake will be identified to cope with deforestation rates in forested upstream watersheds. The methodological approach applied in this paper is a mixed method with system dynamics - based analysis methods. The results of model simulations carried out in Business as Usual conditions and Simulation of Scenarios Model going forward to 2060. From the alternative scenarios available, it reveals that the rehabilitation capability scenario of 3.6% / year is the most optimal in order to overtake deforestation rates in the upstream Ciliwung watershed. If the simulation setting is extended to 2100, the maximum area of ​​forested land in 2090 will be 8,134.05 ha (still below the carrying capacity of the available forest area)."