East Flood Way is one of the rivers in Semarang City that often cause flooding. Flood water level in the East Flood Way is affected by the discharge of storm water runoff and tide (rob). Facts on the ground indicate

ABSTRAK

Inundation of flood and rob (flood due to high tides) in Semarang City is increase wtithin area and depth. It be more seroius condition because of land subsisdence that happened in coastal area of Semarang City. This research is foccused on prediction and mapping of inundation flood and rob due to land subsidence effect in East Semarang, especially Tenggang Watershed and Sringin Watershed. On this research, data analysis including analysis of land subsidence, analysis of hydrological data, analysis of flood discharge with HEC-HMS, hydraulics analysis with HEC-RAS and then mapping the results of the flood inundation with Arc GIS. The inundation will be create with overlay the DEM of flood water level and DEM of topographic. According to the results of analysis is known that minimum land subsidence is 0 cm/year that happened in south area of Semarang and more higher ini north area with maximum land subsidence is 5.58 cm/year. On periode   2014-2031, the contribute of land subsidence to increase the inundation of flood and rob is 1.39%/year.

No abstract

Increased urbanization has an impact on increased impervious surface, consequently the urban drainage system becomes gradually overloaded, with frequent spills and inundate urban areas. Upgrade or re-design the existing drainage system is not an effective solution because it does not address the source of the problem. It is necessary strategies for urbanization reduction of storm-water runoff. These strategies are aimed to reduce storm-water runoff mainly through water infiltration. One of the strategies is to develop permeable pavement. This study is aimed to test the capacity of permeable pavement through the development of full scale physical models in the parking lot. The results show that proposed permeable pavement are able to significantly reduce volume and peak discharge of storm-water runoff, delay the start of runoff and slow the peak discharge. The application of this proposed permeable pavement in the urban area is strongly recommended to reduce drainage load as well as to increase groundwater recharge.

The increasing spread of urbanization is a common phenomenon witnessed in most parts of the world due to the perceived benefits of urban living. A compounding issue is the growing shortage of safe and reliable water sources. Perennial water shortages are becoming a common feature in many parts of the world. It is important to recognize stormwater reuse as a key resource for securing adequate future water supplies based on the concept of 'water fit for purpose'. These require careful prioritization of vulnerabilities, identification of the areas requiring adaptation and provide certainty of outcomes. Given the increasing inevitability of climate change it should be viewed as an opportunity to take advantage of new opportunities which stormwater reuse presents. This study identified key barriers to stormwater reuse and the difficulties in removing them. protecting the planet, Synthesis report of the Secretary-General on the post-2015 sustainable development agenda. http://www.un.org/ga/search/view_doc.asp?symbol=A/69/700&Lang=E, Accessed 18 th August 2015 Wu, P. and Tan, M., 2012, Challenges for sustainable urbanization: a case study of water shortage and water environment changes in Shandong, China, Procedia Environmental Sciences, Vol. 13, pp. 919-927. Yaduvanshi, A. and Ranade, A., 2015, Effect of Global temperature changes on rainfall fluctuations over river basins across Eastern Indo-Gangetic Plains, Aquatic Prodedia, Vol. 4, pp. 721-729.

No abstract

Pengelolaan sampah rumah tangga masih menjadi salah satu masalah serius yang terjadi di kota besar. Pertambahan jumlah penduduk setiap tahunnya akan mempengaruhi volume, jenis dan karakteristik sampah yang dihasilkan setiap harinya. Dari hasil penelitian lapangan yang dilakukan di Kecamatan Semarang Tengah pada Tahun 2017 menunjukkan bahwa sampah yang dihasilkan mencapai hampir 0,98 kg  per orang setiap harinya. Adapun sampah yang dihasilkan terdiri dari  77,5 % sampah organik, 13,5 % sampah plastik, 5,5 % sampah kardus dan kertas, 2,2 %  logam / kaleng dan sisanya adalah kaca dan lainnya. Dari komposisi tersebut, sampah plastik merupakan sampah non organik yang memiliki prosentase tertinggi.  Subjek dalam penelitian ini adalah pelaku dalam rantai pasok pengelolaan sampah plastik. Dari subjek penelitian juga didapatkan faktor internal dan eksternal yang akan digunakan untuk menganalisis  kekuatan (strengths), kelemahan (weaknesses), peluang (opportunities), dan ancaman (threats) dalam meningkatkan dan menjaga keberlanjutan pengelolaan sampah plastik di Kecamatan Semarang Tengah.  Suatu sistem penyediaan bahan baku, proses produksi hingga proses pemasaran sampai ke tangan konsumen, dibutuhkan dukungan teknologi baik berupa aplikasi sederhana yang memberikan informasi tentang ketersediaan jenis dan jumlah bahan baku yang terupdate, sehingga dapat mempersingkat waktu produksi. Selain itu juga perlu dukungan sistem informasi untuk membantu pemasaran produk daur ulang, sehingga jangkauan pengguna / konsumen akan lebih banyak dan lebih luas. Keberadaan teknologi informasi memegang peranan penting sebagai media untuk mempercepat terpenuhinya supply dan demand serta menjamin keberlangsungan dan keberlanjutan usaha.STRATEGY FOR DEVELOPING SUPPLY CHAIN MANAGEMENT IN PLASTIC WASTE PROCESSING  ABSTRACT Household waste management is still one of the serious problems that occur in big cities. The increase of population each year will affect the volume, type and characteristics of waste produced every day. From the results of field research conducted in the District of Central Semarang in 2017 showed that the waste generated reached almost 0.98 kg per person every day. The waste generated consists of 77.5% organic waste, 13.5% plastic waste, 5.5% cardboard and paper waste, 2.2% metal / can and the rest is glass and others. From the results showed that plastic waste is non-organic waste which has the highest percentage. The subjects in this study were actors in the supply chain of plastic waste management.  The research subjects also obtained internal and external factors that will be used to analyze strengths, weaknesses, opportunities and threats in improving and maintaining the sustainability of plastic waste management in Central Semarang District. A system of supplying raw materials, the production process to the marketing process up to the hands of consumers, technology support is needed in the form of a simple application that provides information about the availability of types and quantities of updated raw materials, so as to shorten the production time. It also needs the support of information systems to help marketing recycled products, so that the coverage area of users / consumers will be more and wider. The existence of information technology plays an important role as a medium to accelerate the fulfillment of supply and demand and to ensure the sustainability of the business.