Abstract All of Badung River with a wide width of 10-40 meters is a typical urban river that has very important meaning to the flood handling system in the Denpasar City area. The results showed that the buildings on the Badung River included 2 trash racks, 1 rubber dam, 2 movable weirs and a 42 km long river wall with an average height of 3-5 m. The flood handling system has been carried out with control of the existing discharge through motion weirs and rubber weirs. While reducing waste that can cause flooding is done by building garbage filters. From the results of the analysis the operating and maintenance costs indicate the cost of routine inspection of 57,772,800 IDR/year, routine search fees of 27,936,000 IDR/year, additional eviction fees of 100,550,400 IDR/year, monitoring and evaluation costs 27,360,000 IDR/year, flood material costs 7,240,000 IDR/year, routine operations and maintenance of 3,306,067,750 IDR/years, the need for periodic fees every 5 years is 2,200,000,000 IDR and the cost of dredging sediments and river stone repairs amounting to 1,113,566,000 IDR every five years.
The main purpose of this groundwater conservation program is to prevent the occurrence of groundwatercrisis both quantity and quality that is always faced by the urban city such as Denpasar Bali. Issues of thegroundwater crisis have been discussed frequently, various efforts have been made, but theimplementation of the program is partial and not synergized between related elements, so less precise target, less benefits, and unguaranteed sustainability. This research was conducted in Denpasar, starting in2013 with a research roadmap until 2025. One of the implementation of the program that has been done isby building domestic recharge-wells for rainwater harvesting in the recharge area of Denpasar City, tobalance the groundwater usage for household. The program is implemented through SHIP approach byconsidering all sub-systems as a whole (Systemic), studied through intact thought (Holistic) from variousdisciplines (Interdisciplinary), and involves all stakeholders (Participatory). Through this SHIP approachis expected that the problem solving is appropriate and right on target, all elements feel to participate inplanning, implementing and sense of belonging, so guaranteed sustainability. This program began with atechnical review, discussion of priority issues, program design, selection of appropriate technology,implementing, and evaluation for further development.
Abstract The main requirement in recharging aquifers is the quality of refill water must meet the groundwater quality standards. Therefore, the role of the filtration system is important. The horizontal water filtering system has designed to lengthen the filtering process. First step: Rainwater falls that contaminated with various substances flows into the 20 cm thick and 1 m depth of gravels; Second Step: Rainwater continued flowing into the horizontal pipe, 4” of diameter, 20 cm length, with the fibre palm tree inside. The filtered water comes out and collected in a reservoir, flows into a recharge wells with 4” diameter and 32 m depth, and fills the aquifer after going through the soil layer. Laboratory tests shows that the horizontal water filtering system is effective to reduce the content of substances, except the TDS for filtering system in Plaga Village. It decreased from 135.00 uS/cm to 81.90 uS/cm (26.55 percentage) in Tegallalang village, but it increased from 95.00 uS/cm to 154.00 uS/cm (62.21 percentage) in Plaga village, although it still meets to the groundwater quality standard. The increasing of TDS might be cause by gravels or palm tree fibres that not thoroughly cleaned and still contained TDS.
Masalah umum yang sering dihadapi kota besar adalah terjadinya genangan air atau banjir di saat musim hujan dan krisis air di saat musim kering. Kondisi tersebut juga dialami oleh sebagian wilayah Kota Denpasar, di antaranya adalah Denpasar bagian Utara, sebagian Denpasar Timur, dan sebagian Denpasar Barat. Berbagai upaya telah dilakukan untuk mengatasi masalah tersebut, di antaranya melalui pembuatan sumur imbuhan. Penelitian sebelumnya sudah menghasilkan desain sumur imbuhan untuk pemanenan air hujan yang terbuat dari buis beton diameter 1 m, namun dalam penerapannya mengalami beberapa kendala, terutama masalah ketersediaan lahan dan tenaga kerja untuk mengerjakan galian secara manual. Oleh karenanya perlu dilakukan inovasi desain sumur imbuhan berdasarkan prinsip-prinsip ergonomi yang menempatkan kenyamanan pengguna sebagai pertimbangan utama. Berdasarkan data hidrogeologi, telah dilakukan inovasi desain sumur imbuhan dari pipa HDPe diameter 12” yang pembuatannya dapat dilakukan secara masinal dan pracetak, fleksibel tergantung ketersediaan lahan yang ada di halaman rumah penduduk, bahkan dapat dibuat di sepanjang bawah cucuran atap sehingga tidak memerlukan lahan khusus. Desain dibuat indah sehingga dapat menyatu dengan keindahan rumah. Desain sumur tersebut juga dapat dibuat di sepanjang bahu jalan atau di tempat-tempat fasilitas umum lainnya. Dengan desain yang fleksibel tersebut semua unsur baik masyarakat maupun pemerintah diharapkan tergugah untuk ikut dalam program pemanenan air hujan sehingga pada musim hujan dapat memanen air dalam jumlah yang banyak dan mengurangi terjadinya genangan air atau banjir di saat musim hujan serta mencegah terjadinya krisis air di saat musim kemarau.
Pada jaman dahulu pemakaian material batu padas di Bali pada umumnya terbatas hanya untuk bangunan suci dan untuk keperluan perumahan bangsawan/ keraton. Namun dengan perkembangan jaman seiring dengan berkembang pesatnya sektor kepariwisataan menyebabkan pemakaian batu padas semakin luas penggunaannya baik untuk kantor, sekolah, tempat bisnis maupun untuk akomodasi kepariwisataan. Kondisi ini membawa konsekwensi terhadap meningkatnya permintaan terhadap material batu padas dari waktu ke waktu. Kondisi lain lagi penambangan batu padas yang berlokasi di sepanjang alur daerah aliran sungai Oos diyakini memiliki kwalitas material terbaik di Bali dilihat dari tekstur, warna dan kekuatan materialnya. Permasalahan mulai timbul dimana permintaan batu padas yang meningkat tidak diikuti dengan penyediaan yang memadadi karena persediaan di alam cenderung tetap bahkan mulai berkurang. Kondisi yang ada saat ini menunjukkan bahwa kegiatan penambangan batu padas tersebut telah mulai menimbulkan kerusakan terhadap sungai. Dari penelitian pendahuluan yang dilakukan di Desa Lodtunduh Kecamatan Ubud Kabupaten Gianyar menunjukkan bahwa pengambilan batu padas mulai menunjukkan perubahan yang sangat besar terhadap lingkungan di sekitarnya dilihat dari jumlah material yang diambil, kedalaman penggalian, penurunan kalitas air, kebisingan suara serta berkurangnya kapasitas sungai. Kondisi ini membawa konsekwensi terhadap beberapa hal negatif seperti alur sungai yang mulai mengalami perubahan serta daerah sekitar aliran sungai yang tidak lagi memperhatikan aspek keamanan serta estetika lingkungan. Kwalitas air sungai yang menurun memberi dampak yang tidak bagus terhadap sungai serta terancamnya daerah tebing di sekitar sungai yang berpotensi longsor. Penelitian ini memakai metode deskriftif kwantitatif dan kwalitatif dengan hasil yang diharapkan berupa suatu pola kebijakan penataan Tukad Oos yang komprehensif dan inovatif sehingga kerusakan sungai dapat dicegah. Hasil akhir dari penelitian ini adalah adanya suatu pola kebijakan dalam penambangan batu padas di daerah aliran sungai Oos sehingga kerusakan yang lebih besar bias dihindari.Kata Kunci: Sungai Oos, tambang batu padas , kerusakan sungai In ancient times the use of rock material in Bali in general was limited only to the sacred buildings and for the purposes of royal or palace housing. However, the development of the era along with the rapidly growing tourism sector led to the use of stone more widely or offices, schools, business places and for tourism accommodation. This condition brings consequences to the increasing demand for rock material over time. Another condition of stone rock mining located along the flow of the Oos river basin is believed to have the best material quality in Bali in terms of texture, color and material strength. Problems begin to arise where increasing demand for rocks is not accompanied by an adequate supply because the inventories in nature tend to remain even begin to decrease. Current conditions indicate that the rock mining activities have started to cause damage to the river. From preliminary research conducted in Lodtunduh Village, Ubud District, Gianyar Regency shows that rocks taking start to show a very big change to the surrounding environment seen from the amount of material taken, the depth of excavation, the decrease of water calm, the noise and the decrease in river capacity. This condition brings consequences to some negative things such as the flow of the river that began to change as well as the area around the river that no longer pay attention to safety aspects as well as environmental aesthetics. The quality of declining river water gives a bad impact on the river and the threat of cliff areas around the river that have the potential of landslides. This study uses quantitative and qualitative descriptive methods with the expected results in the form of a comprehensive and innovative Tukad settlement policy so that river damage can be prevented. The end result of this research is the existence of a policy pattern in rock mining in the Oos watershed area, so that greater damage can be avoided.Keywords: Oos river, rock mining, river damage
Abstract Song River is a small river with a wide variety of 5 to 18 meter of water sourced from Lake Batur to the south through Bunutin Village in Kintamani District, Bangli Regency. The existence of this river is important because it is the main source of irrigation water in the Bunutin agricultural land which covers about 152 ha of rice fields. Utilization of Song river discharge for irrigation on Bunutin agricultural land has relied on water from community rock piles with water extraction in the form of 1.2 km of land tunnel. The tunnel has a high variable dimension of 0.75 to 1 meter and a varied width of 0.6 to 0.8 meter. This research was conducted through the stages of observation, measurement and analysis of river characteristics. The results of the flood analysis showed Q50 is equal to 21.81 cubic meter per second. Based on the existing situation, the placement of weirs is placed behind a tunnel with a width of 18 meter in the form of ogee crest weir. Weir material in the form of stone pairs.
Keberadaan mata air bagi masyarakat Hindu di Bali mempunyai makna yang sangat penting disamping sebagai sumber air untuk keperluan sehari-hari juga mempunyai makna yang sangat penting yaitu sebagai air suci ( tirta ) dalam kegiatan upacara keagamaan. Tujuan dari penelitian ini adalah untuk merumuskan pola penataan mata air Beji Kaler sesuai corak masyarakat Desa Ababi dengan mengaplikasikan bangunan berlandaskan konsep arsitektur tradisional Bali yang berkelanjutan. Metode yang dilakukan dalam penelitian ini dengan melakukan pengamatan langsung ke lapangan, melakukan koordinasi dengan instansi terkait serta tokoh dan masyarakat setempat serta kajian literatur. Dari kajian yang dilakukan menunjukkan bahwa masyarakat memerlukan desain penataan bangunan dengan filosofi desain arsitektur tradisional Bali yang sudah ada di masyarakat serta dengan pemakaian bahan-bahan yang ada di sekitar wilayah mata air tersebut. Pola penataan dengan mengadopsi nilai-nilai yang sudah tertanam di masyarakat serta dengan pemakaian material bangunan yang ada di sekitar lokasi menjadikan pola penataan yang dilakukan menyatu dengan semua unsur baik lingkungan, masyarakat serta pola tradsis yang sudah berkembang di wilayah setempat. Pola penataan yang dibutuhkan dalam penataan mata air Beji Kaler adalah pembuatan Tembok keliling ( Penyengker ), Bangunan Piasan dan Ca ndi Bentar dengan material batu padas hitam Besakih .
Abstract The areas of Denpasar, Badung, Gianyar and Tabanan in Bali are areas with the densest population concentrations in Bali. This area is also the main tourism area in southern Bali. Data from Bali Penida River Council in 2015 shows that the water potential in Sarbagita region is 2, 182 cubic meters per year. The need of water in 2034 is estimated at 21, 247 liter per second. Solving the lack of water can be done by increasing the amount of raw water using water in the estuary section. Some potential rivers can be utilized, such as the Oos River, Unda River, Pakerisan River. The research method is carried out by analyzing the water requirements and the availability of water available. The results of the research show that it is necessary to utilize surface water downstream which has not been maximally utilized.
Jatiluwih Village is located in Penebel District, Tabanan Regency, Bali. Jatiluwih Village is a highland village located at the foot of Mount Batukaru. This village is located at an altitude of 500-1500 meters above sea level and has an average rainfall of 2500 mm/year. Most of the population in the Jatiluwih area still relies on the economy of planting rice, with a good irrigation system. Rice fields in the Jatiluwih irrigation area need protection and preservation so that their area does not decrease. This priority is necessary because the meaning of land, including paddy fields is very important for humans, not only to own, but also to live their lives. Irrigation is an effort made to obtain water by using intake buildings and carrier channels. The Jatiluwih Irrigation Area has water sources from several springs that flow in the Jatiluwih Area. Jatiluwih weir with water sources from Tukad Baat has an irrigation area of 390 ha. The subaks that are irrigated by the Jatiluwih Dam are Jatiluwih Subak, Subak Gunungsari, Subak Kedamaian and Subak Wangaya Betan. The development and management of irrigation networks will greatly assist water-using farmers in an effort to increase the production of agricultural products, especially rice.
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