Judul: Design of Spring Water Catchment Building and Water Distribution System at Kalikajar Village, Wonosobo Regency
Abstrak: Kecenderungan pertambahan penduduk di Desa Kalikajar menunjukkan peningkatan kebutuhan air bersih. Penyediaan air air bersih belum optimal karena faktor geografi dan penurunan debit pada musim kemarau. Penelitian ini dilakukan untuk merencanakan bangunan penangkap mata air dan jaringan pipa distribusi air bersih di Desa Kalikajar. Data yang digunakan berupa jumlah penduduk, kebutuhan air, dan debit mata air. Proyeksi jumlah penduduk dihitung dengan metode aritmatika, geometrik, eksponensial, dan logistik, sedangkan kebutuhan air bersih dihitung berdasarkan SNI 19-6728.1-2002. Jumlah penduduk yang mencapai 5328 jiwa pada tahun 2050 menyebabkan peningkatan kebutuhan air bersih 9.68% dan kebutuhan air domestik mencapai 4.63 L/detik. Debit mata air mencapai 10.80 L/detik. Bangunan penangkap mata air dirancang dengan Tipe B dan 3 reservoir dirancang dengan kapasitas tampungan 7 m3. Distribusi air direncanakan dengan sistem gravitasi, karena beda elevasi antara mata air dan desa lebih dari 10 m, dengan menggunakan pipa PVC berdiameter 100 – 150 mm, sepanjang 11843 m. Desain dapat diterapkan karena memenuhi persyaratan yang berlaku., The population growth in Kalikajar Village shows the increasing of water demand. Clean water availability is not optimal due to geographical factors and discharge reduction during the dry season. This research was conducted to design spring water catchment building and water distribution system at Kalikajar Village. The data of population, water demand, and water spring discharge were utilized in this research. The population growth was calculated using arithmetic, geometric, exponential, and logistic method, while water demand is calculated based on SNI 19-6728.1-2002. The population growth that reaches 5328 people in 2050 resulted in increasing water demand of 9.68% and domestic water demand reaches 4.63 L/s. The water spring discharge average was 10.80 L/s. The water spring catchment building was designed with Type B and 3 reservoir was designed with capacity of 7 m3. The water distribution was designed with gravitation system, because the elevation difference between the spring and the village is more than 10 m by using PVC pipeline with diameter of 100 – 150 mm and total length of 11843 m. The design meets the requirement standard and can be implemented.
Keyword: distribution system, reservoir, spring water

Judul: Perencanaan Sistem Distribusi Air Bersih di Desa Pulosari, Kecamatan Pengalengan, Kabupaten Bandung - Jawa Barat
Abstrak: Water is a basic requirement in daily life. Without water, humans are not able to carry out their daily activities. In an effort to distribute clean water to the community, the pipe system could be utilized. In designing the pipe system, the things that need to be taken into account are the amount of capacity and speed of the flow of a fluid through a system of pipelines and other things required in terms of planning. The population of Pulosari on RW 05, 06, 11 and 14 in 2012 is 2950 persons. The purpose of this research is designing a clean water distribution system by utilizing the raw water source of the reservoir in Pulosari village, Pengalengan sub district, Bandung district - west java. The main parameters that need to be evaluated is the pipe, discharge, pressure, and headloss. The main parameters that need to be evaluated is the geometric pipe, discharge, pressure, and headloss. This research was conducted with the primary and secondary data collection which is then proceeded with data analysis using the Epanet 2.0 software. From measurement performed, during rainy season flowing water to a reservoir only reachedto 1,37 LPS, For that required planning distribution system better namely by increasing the capacity of a building intake so as to discharge distributed to a reservoir will increase the size of 4,5 LPS, Discharge is able to meet the needs of water until 2022 year. HGL acquired value is above the soil surface so as to produce a positive residual head, this causes the water can flow from the reservoir into the water tank. Besides the new design of the pipe is needed on the distribution networks of water from the reservoir into the sump by replacing the pipe diameter of 1.5 inches to 2 inches to enlarge the flow which occurred in the distribution network.
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Judul: Insecticidal Activity of Essential Oils Leaves of Cinnamomum spp. (Lauraceae) against Crocidolomia pavonana and Their Phytotoxicity on Broccoli Seedlings
Abstrak: Essential oils from leaves of 13 species of Cinnamomum were tested for their insecticidal activity on the cabbage head caterpillar Crocidolomia pavonana with leaf immerse method. The results showed that the treatment with 1% (w/v) essential oils leaves of C. celebicum, C. multiflorum, C. sintoc, and C. verum caused 21.45, 93.65, 60.30, and 76.10% mortality, respectively. Based on the results of phytotoxicity and insecticidal activity tests, C. multiflorum oil was further tested at 6 concentration levels. In all treatments, larval mortality has occurred at 24 hours after treatment (HAT) and increased at 48 HAT. LC50 of C. multiflorum oil at 24 and 48 HAT was 0.504 and 0.396%, respectively. The treatment with C. multiflorum oil at ≤0.31% did not inhibit the development of C. pavonana larvae. Determination of the chemical constituents of Cinnamomum oils were carried out by gas chromatography-mass spectrometry (GCMS). Totally, 345 compounds were identified. Methyleugenol constituted the main component (49.4%) of leaf essential oil of C. multiflorum and was assumed to be responsible for the insecticidal activity of the oil against C. pavonana larvae. LC50 of pure methyleugenol obtained at 0.365% (48 HAT) and 0.363% (72 HAT). The results showed that C. multiflorum was more effective with LC50 value equivalent to methyleugenol content of 0.32% (24 HAT) and 0.24% (48 HAT).
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