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PEMETAAN DAERAH ALIRAN SUNGAI LELEMA DAN KONDISI FISIK JARINGAN IRIGASI DI DESA POPONTOLEN BERBASIS SISTEM INFORMASI GEOGRAFIS Pisu, Kristianto; Ludong, Daniel P.M; Rumambi, David p.
COCOS Vol 1, No 3 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i3.21174

Abstract

ABSTRACT  The watersheds is an ecosystem and the main elements of this ecosystem are natural resources (land, water and vegetation) and human resources that utilize natural resources. Regarding with the relationship between watershed and irrigation as one component in the water resources management, watersheds determine the availability of irrigation water when the watershed ecosystem is disrupted. In this condition, the water supply for irrigation decreased and therefore the agricultural productivity reduced. The area of the Lelema Watershed is 3,095 ha with a main river as long as 12,787 m that ends in the main river of Nimanga. The irrigated area of the Popontolen village is geographically located in the irrigation area  of Popontolen Village that is located at 1o15'47 "- 1o16'40" LU and 124o36'20 "- 124o38'00" BT. The area of Popontolen irrigation is 121.20 ha and consisted of primary, secondary and tertiary channels. In conclusion, the carrying channel in the irrigation area of the Popontolen Village is 7,468 meters and the length of primary and secondary carrier channels are 213 and 3,131 m, respectively.  Keywords: Lelema Watershed, Technical Irrigation, Geographic Information System.
ANALISIS KEHILANGAN AIR PADA JARINGAN IRIGASI BENDUNG TALAWAAN KABUPATEN MINAHASA UTARA Pongoh, Farano M.; Rumambi, David P.; Pakasi, Sandra; Ludong, Daniel
COCOS Vol 6, No 17 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i17.10530

Abstract

ABSTRACT Talawaan dam, North Minahasa Regenc that was built in 1912, was planned to irrigate 1037 ha paddy field covering five villages, i.e. “Desa Kolongan”, “Desa Talawaan”, “Desa Tumbohon”, “Desa Winetin”. The objective of this research was to inform the physical condition of irrigation network system in Talawaan Dam. This research was conduced from November 2014 - Februari 2015 (4 Months). The data was collected usong survey method, float measurements. The result showed that the irrigation network system in this dam was not appropriate with the planned scheme based on the number of (water structures) and irrigated field area. In addition, there was water loss because of overflowing and leakage in the irrigation network.   Keywords :Talawaan Dam , Irrigation  
UJI TEKNIS BIOGAS DARI BAHAN BAKU FESES SAPI DI DESA TOTABUAN KECAMATAN LOLAK KABUPATEN BOLAANG MONGONDOW Tuwuilu, Batin E.; Rumambi, David P.; Rantung, Ruland A.; Pinatik, Herry F.
COCOS Vol 4, No 5 (2014)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v4i5.4766

Abstract

ABSTRACTEnergy is a crucial global issue. Demand for energy increases every year. According todata collected by the Ministry of Energy and Mineral Resources (2006) Indonesia’s oilsupply amounts to a mere 9 billion barrels, which will run out with continued consumption.To decrease dependency on fossil fuels, the government has issued Peraturan PresidenRepublik Indonesia number 5 year 2006 about National Energy Policies to developalternative renewable energy resources. Energy experts around the world are now researchingand developing renewable energy, one of which is biogas. This research is done in Totabuanvillage, district of Lolak, Bolaang Mongondow regency, using experimental methods withdescriptive analysis of the formation of biogas using biodigester technology with a permanent12 m3 dome-type reactor. Biogas started forming on the 9th day, up to the 26th day, with 12m3 of raw materials, which is a 1:1 mix of cow feces with water (6 m3 cow feces and 6 m3water), and yielded 4,68 m3 of biogas that can be used to cook for 12,3 hours. Each 1 m3 ofbiogas can be used to cook for 2,63 hours. Biogas yield is 39%Keywords: Energy, Renewable, Biodigester, Biogas.
ANALISIS JARINGAN IRIGASI BENDUNGAN SANGKUB KABUPATEN BOLAANG MONGONDOW UTARA BERBASIS SPASIAL Kono, Amalludin S.; Rumambi, David P.; Pakasi, Sandra; Wulur, Hildy
COCOS Vol 4, No 5 (2014)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v4i5.4765

Abstract

ABSTRACTSangkub dam was built in 2005, before the establishment of the regency of NorthBolaang Mongondow. This dam, with an approximate width of 100 meters, is planned toirrigate 3.601 ha of rice fields in two districts: Sangkub and Bintauna. In 2012, the damstarted operating and irrigated the rice fields in Sangkub. This research aims to provideinformation about the conditions of the irrigation network of Sangkub dam based on spatialanalysis. This research was conducted over the course of six months (August 2013 – January2014) in Sangkub dam, Sangkub district. Data was collected through surveys, image analysesand experiment using buoys. This research shows that Sangkub’s irrigation network does notmatch the planned schematics regarding number of buildings. There is a lack of floodgates inthe secondary channels in Tombolango and there are five overflow points and one leakagepoint in the irrigation channels of Sangkub dam.Keywords: Irrigation network, Sangkub dam, Spatial
PEMETAAN KONDISI FISIK JARINGAN IRIGASI DESA RASI RAYA KECAMATAN RATAHAN KABUPATEN MINAHASA TENGGARA BERBASIS SISTEM INFORMASI GEOGRAFIS Hariawan, Stevano F. X.; Rumambi, David P.; Pakasi, Sandra E.
COCOS Vol 3, No 3 (2020)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v3i3.29662

Abstract

ABTRACTThe Lahendong Irrigation Network is located in Rasi Raya Village RatahanSubdistrict Southeast Minahasa Regency, which was established in 1971. In December 2013,damage to buildings and channels in the irrigation network. This research aims to make amap of physical conditions in the village of Rasi Raya, Ratahan District, Southeast MinahasaRegency, based on geographic information systems. This research was conducted in July2019-October 2019. The method is used in this research is imagery by using analysis fromGIS Software and measurements of the field. Lahendong Irrigation Network is geographicallyat 0°59'19.34"N-1°05'1.61"N (north latitude) and 124°44'27.66 "E-124°47'08.29"E (eastlongitude) altitude 225 – 340 meters above sea level, has an irigation network condition indexof 77.22% with an infrastructure weight of 34.75 out of a maximum value of 45, so periodicand routine maintenance was needed. The Lahendong Irrigation Network has an area of95.80 hectare and a channel of 9868 meters. Irrigation efficiency in the Lahendong IrrigationNetwork is 51.69% and water loss in the channel is 0.05 m3/second and evaporation is 3308mm/day. Lahendong Irrigation Network is presented in a spatial form namely Map ofLahendong Irrigation Network.Keywords : Physical Condition of Irigattion Network,Geographic Information System
ANALISIS KELAYAKAN AIR DAS TALAWAAN SEBAGAI SUMBER AIR IRIGASI Sigar, Stehvani Regina; Rumambi, David P.; Rantung, Ruland A.
COCOS Vol 3, No 3 (2020)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v3i3.29660

Abstract

ABTRACTThis research aims to determine the feasibility of the Talawaan river basin as a source ofirrigation water in the Talawaan weir based on electrical power (DHL), adsorption ratio(SAR/Sodium Adsorption Ratio), boron, pH, mercury and cyanide. This research was conductedin the Talawaan weir North Minahasa Regency, in the Baristand Laboratory (Industry Researchand Standardization Hall) and the Water Laboratory Nusantara (WLN). Sampling is purposive atfive point of sampling location with two repetitions, during drought (period I) and during rain(period II) so that samples amounted to 10 samples. The measurement results obtained from thelaboratory compared with the criteria of the quality raw irrigation water in a descriptive. Theresults showed that the six variables measured were still below the maximum level of qualitystandards so that water is categorized worthy of use as water for irrigation.Keywords: quality of irrigation water, DHL, SAR, Boron, Mercury, Cyanide
PENERAPAN IRIGASI HIDROPONIK SISTEM AKAR TELANJANG (Bare Root System) PADA TANAMAN KANGKUNG (Ipomea Aquatic forsk). Tulung, Ronaldo; Rumambi, David P.; Ludong, Daniel P. M.
EUGENIA Vol 25, No 3 (2019)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.25.3.2019.31404

Abstract

This study aimed to test the application of the Deep Flow Technique (DFT 4cm dan DFT 2cm)  and Nutrient Film Tecnique (NFT) bare root system hydroponic system on water spinach plants by calculating plan water requirements and measuring vegetative growth of water spinach plants with thickness / water level different. The results showed that the CU (Coefficient Uniformity) value was 95% in that DFT 4cm, 111,55ml of water as used, plant height and number of leaves were relatively that same as t6he other treatments with a plant mass weight of 181.28gr, with a stem meter of 12.92cm. DFT 2cm required 90.17ml of water with a plant mass weight of 160.33gr. NFT needs water as much as 106.57 ml with a plant mass weght of 153.28gr.
KAJIAN IRIGASI MIKRO PADA SISTEM HIDROPONIK PADI (ORIZA SATIVA L.) VARIETAS SERAYU DALAM RUMAH TANAMAN Moningka, Christian N. G.; Ludong, Daniel P. M.; Rumambi, David P.
Jurnal Teknologi Pertanian (Agricultural Technology Journal Vol 11, No 1 (2020): Jurnal Teknologi Pertanian (Agricultural Technology Journal)
Publisher : Fakultas Pertanian, Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jteta.11.1.2020.29981

Abstract

ABSTRACTThe purpose of this study was to examine the effect of the thickness of irrigation water flow in the Deep Flow Technique (DFT) hydroponic system on the amount of plant water requirement (or evapotranspiration) and the Water Use Efficiency (WUE) in rice cv. Serayu at the vegetative phase. This research was carried out in a tropical greenhouse roofed with polyethylene (PE) plastic film. The treatments in this study were three kinds of thickness of  micro irrigation in the DFT hydroponic system, i.e. 2, 4 and 6 cm. The results showed that water requirement for each planting hole in rice plants during the vegetative phase (60 days) were 14.3650, 12.7025, and 11.3108 with biomass of 62.4576, 58.2874 and 52.6370 g, respectively for 6, 4 and 2 cm. The water use efficiency in 2, 4, 6-cm-DFT-system were 2.3268,  2.293 and 2.1740 g/L, respectively. Keywords: Hidroponics, Deep Flow Technique, Evapotranspiration, Water Use Efficiency
ANALISIS EKONOMI MESIN PERONTOK (POWER THRESHER) KEDELAI TIPE MPT 001 Rompas, Putria G.; Molenaar, Robert; Rumambi, David P.
COCOS Vol 4, No 4 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v4i4.35082

Abstract

AbstractThis study aims to analyze the economy, total costs and economic feasibilityof the soybean threshing process using the power thresher MPT 001 Type atLolah Satu Village, East Tombariri District, Minahasa Regency. Break evenpoint value or operational break even point of the power thresher MPT 001Type is at an operating level of 17.866,53 kg/year or equivalent to Rp.7.878.577/year. Analysis of the operational feasibility of the power thresherMPT 001 Type based on the amount of service potential available using acommercial scale calculation base is, resuted NPV value of Rp.302.056.654,69, the IRR of 195,982%, the B/C ratio of 1.4497. This conditionshows that the power thresher MPT 001 Type is economically feasible. Basedon the existing condition on site the machine does not fulfil the operationconditions that guarantee sustainability. The sensitivity analysis shows thatchanges in the level of working hours per year and the price of drying servicesare very influential on the feasibility of operations with the lowest level beingthe service price of 1.1 times the total cost of threshing services.Keywords: economics analysis. power thresher, soybean
ANALISIS SISTEM JARINGAN IRIGASI BENDUNGAN PONTAK KABUPATEN BOLAANG MONGONDOW UTARA DENGAN SISTEM INFORMASI GEOGRAFIS Rivai, Haiqal B.; Rumambi, David P.; Pakasi, Sandra E.
COCOS Vol 4, No 4 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v4i4.34919

Abstract

ABSTRACTThe purpose of this study is to analyze the irrigation network system of the PontakDam, North Bolaang Mongondow Regency based on geographic information systems. Themethod used in this research is the method of spatial analysis, namely a field survey by takingseveral measurements whose data is presented in the form of maps, tables and analyzeddescriptively. Information on the irrigation network of the Pontak dam has been presented ina spatial form in the form of a map of the irrigation network of the Pontak dam. The area ofPontak right irrigation network service is 131.63 Ha. If referring to the data from the PUPRService in the field of water resources, North Bolaang Mongondow Regency regarding thearea of rice fields in 2019 of 136.84 Ha, there is a difference in the area of rice fields of 5.21Ha. The index of the physical condition of the Pontak dam irrigation network is 93.44% witha weight of 42.05 infrastructure from a maximum value of 45.00, so routine maintenance isneeded.Keywords : Irrigation Network System, Geographic Information System