Abstract. Jakarta, the capital city of Indonesia, experiences flood which causes activities disruption and losses almost every year. Many studies have been done to mitigate the impact of flooding. Most of them focus on reducing the inundated area as an indicator of the effectiveness of flood control. This study aims to evaluate the effectiveness of several flood control alternatives based on risk level reduction. The case study is located in Kampung Melayu Village and Bukit Duri Village which are densely populated with several economic area and almost every year experiencing severe flooding in Jakarta. Risk level analysis was carried out by the method based on guidelines issued by the Head of National Disaster Management Agency (BNPB) No. 2/2012 with few modifications. The analysis is conducted on five alternatives of flood control which are diversion channel to East Flood Canal (KBT), diversion channel to the West Flood Canal (KBB) in Pasar Minggu, river improvement, capacity enhancement on all components, and capacity enhancement focusing on one component. From the results, it is showed that enhancing capacity which focus on preparedness component by two levels are the best in terms of investment value to risk level reduction.

Abstract. Land use change are become issues for many river basin in the world, including Cikapundung River Basin in West Java. Cikapundung River is one of the main water sources of Bandung City water supply system. In the other hand, as one of the tributaries of Citarum River, Cikapundung also contributes to flooding in the Southern part of Bandung. Therefore, it is important to analyze the effect of land use change on Cikapundung river discharge, to maintain the reliability of water supply system and to minimize flooding in Bandung Basin. Land use map of Cikapundung River in 2009 shows that residential area (49.7%) and mixed farming (42.6%), are the most dominant land use type, while dry agriculture (19.4%) and forest (21.8%) cover the rest. The effect of land use change in Cikapundung River Basin is simulated by using Hydrological Simulation Program FORTRAN (HSPF) through 3 land use change scenarios: extreme, optimum, and existing. By using the calibrated parameters, simulation of the extreme land use change scenario with the decrease of forest area by 77.7% and increase of developed area by 57.0% from the existing condition resulted in increase of Qmax/Qmin ratio from 5.24 to 6.10. Meanwhile, simulation of the optimum land use change scenario with the expansion of forest area by 75.26% from the existing condition resulted in decrease of Qmax/Qmin ratio from 5.24 to 4.14. Although Qmax/Qmin ratio of Cikapundung is still relatively small, but the simulation shows the important of water resources analysis in providing river health indicator, as input for land use planning.

Kinerja irigasi menjadi suatu indikasi dalam rangka menggambarkan suatu pengelolaan sistem irigasi, Penilaian kinerja berdasarkan Permen PU No.32/2007 dilakukan terhadap 6 (enam) parameter yaitu; Prasarana Fisik, Produktivitas Tanam, Sarana Penunjang, Organisasi Personalia, Dokumentasi dan Perkumpulan Petani Pemakai Air (P3A), sedangkan pendekatan metode MASSCOTE dilakukan dengan evaluasi Rapid Appraisal Procedure (RAP) yang merupakan seperangkat prosedur sistematis untuk mendiagnosa hambatan, kinerja dan tingkat layanan dalam sistem irigasi terhadap 4 (empat) indikator utama yaitu; Indikator Pelayanan, Indikator P3A, Indikator SDM Operator, dan Indikator Modernisasi Operasi Saluran. Penilaian kinerja dilakukan melalui survei terhadap petugas OP irigasi dan petani P3A yang menunjukkan indeks kinerja sebesar 74,24% atau kategori Baik terhadap kinerja Operasi dan Pemeliharaan berdasarkan Permen PU No.32/2007, sedangkan indeks kinerja sebesar 2,7 berdasarkan metode MASSCOTE dengan evaluasi RAP menunjukkan Level of Service pada kategori Kurang Baik terhadap kinerja Operasi Saluran dan Pelayanan Irigasi. Berdasarkan analisis jalur didapatkan pengaruh signifikan secara bersama variabel indikator utama X1,X2,X3 dan X4 terhadap variabel kinerja sistem irigasi (Y) sebesar 0,701 atau 70,1% dengan residual error sebesar 0,299 atau 29,9%.

No abstract

The construction of toll roads in Indonesia is an effort by the government to improve the national competitiveness index and the national logistics cost performance index, including through the development of road infrastructure, including toll roads. The Toll road is a road that is devoted to two or more axle vehicles (cars, buses, trucks) and aims to shorten the distance and travel time from one place to another. Toll roads are part of the road network system and national roads for which users are required to pay. The implementation of toll road construction in Jakarta as in other cities has a level of difficulty in carrying out the work due to very high traffic activities, utilities that must be relocated or avoided, of course, have a very high risk as well. These consequences are unfavorable for the project because they will hinder and hinder the achievement of project objectives. Some of the risks in toll road construction work include utilities, land acquisition, window time, and traffic management. The risks mentioned above are some of the causes of delays that occur during the implementation of toll road projects. In determining the factors of delay, this research uses the SPSS (Statistical Product and Service Solutions) method. The method used in determining the ranking of the delay factor is the stepwise method. There were 9 affecting factors, namely job duration analysis, waiting time analysis, repetitive job analysis, decision making, utility, critical path determination, work method approach, innovative way of thinking, and job sequence analysis. The application of the toll road construction work process with scheduling innovation based on the integration of the Line of Balance and the Critical Path Method can optimize project performance in terms of time. The research is expected to produce innovative studies as an alternative to the best recommendations in terms of project time performance for service providers and service providers. By knowing the key factors in the completion of toll road works, this research is expected to be a benchmark or pilot for toll road construction projects, as well as in the application of pier work on toll road projects.