Claim Missing Document
Check
Articles

Found 27 Documents
Search

Study on the Soil Strength and Density Relationships of Latosol and Red Yellow Podzolic Soils Asep Sapei; E. Namaken Sembiring; Gatot Pramuhadi
Jurnal Keteknikan Pertanian Vol. 14 No. 1 (2000): Buletin Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.014.1.%p

Abstract

The soil strength characteristic, which is usually e.xpressed bycohesion and internal piction, is as basic data for applying farmmachineries/equipments and farm structures. The objective of this research is to study the soil strength and density relationships of latosol and red yellowish podzolic soil. This research was conducted by standard compaction test and soil strength test (uniaxial, direct shear and triaxiul).
PENGEMBANGAN KEBIJAKANPENGELOLAAN AIR BAKUBERKELANJUTANDI SUB DAS KONAWEHA KABUPATEN KONAWE SULAWESI TENGGARA Surya, Ridwan Adi; J. Purwanto, M Yanuar; Sapei, Asep; Widiatmaka, Widiatmaka
Jurnal Analisis Kebijakan Kehutanan Vol 12, No 3 (2015): Jurnal Analisis Kebijakan Kehutanan
Publisher : Pusat Penelitian dan Pengembangan Sosial, Ekonomi, Kebijakan dan Perubahan Iklim

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2290.898 KB)

Abstract

Pasokan air untuk mendukung pembangunan dan kebutuhan manusia perlu dijamin untuk kondisi yang berkelanjutan. Penelitian ini bertujuan untuk (1) menganalisis tingkat keberlanjutan pengelolaan air baku di Sub DAS Konaweha Kabupaten Konawe, (2) menganalisis faktor-faktor penting yang mempengaruhi keberlanjutan pengelolaan air baku di Sub DAS Konaweha Kabupaten Konawe, dan (3) menganalisis peran kelembagaan ditinjau dari aspek kendala yang dihadapi, kebutuhan program pemerintah terkait, serta lembaga yang berperan dalam pengelolaan air baku berkelanjutan di Sub DAS Konaweha Kabupaten Konawe. Hasil analisis Multi Dimensional Scalling (MDS) dengan Rap-Konawe menunjukkan bahwa status keberlanjutan pengelolaan air baku di Sub DAS Konaweha Kabupaten Konawe adalah kurang berkelanjutan dengan indeks keberlanjutan 41,40%. Dimana dimensi ekologi cukup berkelanjutan (52,36%), dimensi ekonomi kurang berkelanjutan (36,93%), dimensi sosial kurang berkelanjutan (34,16%), dimensi teknologi kurang berkelanjutan (35,39%), dan dimensi kelembagaan kurang berkelanjutan (35,39%). Hasil analisis Interpretative Structural Modelling (ISM) menunjukkan terdapat tiga unsur yang perlu diperhatikan: (1) Kendala (penurunan fungsi penyerapan air karena berkurangnya vegetasi di daerah tangkapan air, dan kurangnya koordinasi pengelolaan sumberdaya air antara para pemangku kepentingan), (2) Kebutuhan (peningkatan pengetahuan dan keterampilan personil kantor pemerintah, dan peningkatan kesadaran stakeholder), dan (3) Lembaga (BPDAS Sampara dan Dinas Kehutanan Kabupaten Konawe).
THE APPLICATION OF TRANSMITTER AND RECEIVER TO DETECT THE PLOUGHING DEPTH M. Hariansyah; Setiawan R. P.A; Desrial .; Made D.S; Asep SApei
JUTEKS Vol 2, No 2 (2015)
Publisher : Department of Elektro Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (557.557 KB) | DOI: 10.32832/juteks.v2i2.397

Abstract

Transmitter and receiver were applied in this research to detect the mole plough. Transmitter was placed outside the farm while receiver was attached on the mole plough construction and then pulled by tractor. Mole plough was used to create drainage channel. However, creating drainage channel at slope of 0,02% is a difficult task as mole ploughing depth is strongly affected by the contour of soil surface. The objective of this research was to design a device which had ability to control mole ploughing depth. Transmitter used a modified green laser beam which used to measure the profile of soil surface. Receiver was used to receive signal. Light receiver sensor used photodiode which formed into matrix sized of (1x8), every row consisted of 40 sensor of photodiode with 8 levels of depth. When transmitter was activated, green laser beam transmitted 1.206 Hz frequency and can be transmitted for maximum 50 m. When photodiode sensor received green laser beam at allowable detection range, the light beam was transmitted to Arduino microcontroller. There were two microcontrollers used to control two units of relay. The first microcontroller was used to detect the contour level of soil surfaceand second microcontroller was used to measure the mole ploughing depth. The research found that there was deviation of mole ploughing depth between setpoint and field testing result.
LAND USE CHANGE ASSESMENT AND ITS PROJECTION IN BATANGHARI RIVER BASIN, SUMATERA, INDONESIA Utami, Nurya; Sapei, Asep; ., Apip
LIMNOTEK - Perairan Darat Tropis di Indonesia Vol 24, No 2 (2017)
Publisher : Research Center for Limnology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The study followed about changes in land use in the region of  Batanghari river basin. Land cover maps derived from supervised classification of  satellite imagery  LANDSAT MS / ETM / OLI. The images in the study area were categorized into six classess, namely water body, settlement, agriculture, bush, openland and forest. The validation for classification result was using  Kappa Statitistic with average yield of 85% -95%. Based on the classification results, the biggest extent of land cover change is forest areas into agricultural areas. Changes in the area of certain types of land cover can be seen in the change detection matrix. Data extents of land use was used to calculate the land use demands from recent past to near future. Two scenarios were used to produce land use projection from 2016 to 2045. First projection, generating a dominant land use type of agriculture. Addition of the areas about 22%  from 2015, which is around  3.148.100 ha. While forest area decrease almost 50%. Second scenario is fast growth scenario, producing a forest areas about 450.275 ha. Whereas agriculture area reaches a maximum changes of 3.300.742 ha.
Analisis Bangunan Pengendali Sedimen Dengan Menggunakan Model Soil And Water Assessment Tool Pada Sub-Daerah Aliran Sungai Citanduy Hulu, Jawa Barat Said Karim; Nora H. Pandjaitan; Asep Sapei
JURNAL TEKNIK HIDRAULIK Vol 5, No 2 (2014): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1510.209 KB) | DOI: 10.32679/jth.v5i2.305

Abstract

FORMULASI INDEKS KERENTANAN UNTUK PEMENUHAN KEBUTUHAN AIR BERSIH PULAU-PULAU KECIL (Studi Kasus : Provinsi Nusa Tenggara Timur) Hermawan, FX; Sapei, Asep; Dharmawan, Arya Hadi; Anna, Zuzy
Jurnal Sosial Ekonomi Pekerjaan Umum Vol 7, No 2 (2015)
Publisher : Puslitbang Kebijakan dan Penerapan Teknologi (PKPT), Kementerian PUPR

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1533.017 KB)

Abstract

Krisis sumber daya air terjadi di pulau-pulau kecil. Kondisi ini merupakan refleksi dari kerentanan, yang sangat dipengaruhioleh berbagai dimensi baik sosial, ekonomi, maupun lingkungan. Penyusunan indeks kerentanan dengan parameter yangkomprehensif sangat diperlukan untuk keberlanjutan pengembangan pulau-pulau kecil krisis air. Dalam menentukanapakah suatu daerah mempunyai potensi kerentanan terhadap krisis air di pulau kecil, diperlukan suatu acuan berupaindeks sebagai kumpulan parameter yang menjadi alat ukur potensi kerentanan tersebut.Pengukuran kerentanan denganmembuat formulasi indeks kerentanan pulau kecil krisis air menjadi penting untuk dilakukan agar mengetahui sejauhmana kondisi krisis air suatu daerah sehingga dapat dipilih tindakan yang paling sesuai untuk pemenuhan kebutuhan airpada masyarakat di pulau-pulau kecil yang mengalami krisis air. Penelitian ini dilakukan dengan pendekatan kuantitatifyang bersifat positivistik-deduktif. Berangkat dari konsep dimensi kerentanan, yaitu : ketersingkapan, kapasitas adaptifdan sensitivitas yang kemudian dioperasionalkan menjadi indikator/parameter dalam kemasan indeks untuk mengukursebuah kondisi kerentanan. Metode penelitian yang digunakan juga berupa metode kuantitatif untuk menemukenalivariabel–variabel yang berpengaruh dalam menentukan indeks kerentanan.Dalam ragam penelitian kuantitatif, penelitianini tergolong penelitian penjelasan (explanatory confirmatory research). Temuan lapangan menunjukkan bahwa dariketiga pulau yang diteliti masuk dalam kategori rentan.Pulau Solor merupakan pulau yang paling rentan terhadap krisisair, kemudian Pulau Ende, dan yang terakhir Pulau Semau.
Analysis of Maros River Discharge Using the Modified Soil and Water Assessment Tools (SWAT) Program Ahmad Fausan; Asep Sapei; Yuli Suharnoto; Nora Herdiana Pandjaitan
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 11, No 1 (2022): March
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v11i1.146-160

Abstract

Soil and Water Assessment Tools (SWAT) which is developed in America was used to analyze the effect of land management on discharge, sedimentation, and water quality in a river basin area. The hydrological conditions in the Americas are different from Indonesia, so a modified SWAT is done. This research aimed to implement a modified SWAT program to predict the results of a better discharge analysis based on hydrological analysis in the sub-Watershed area. About 13.90% of the area was paddy fields. The evaluation of the module had been done by looking at the coefficient of determination (R²) and Nash-Sutcliffe Efficiency (NSE) based on the comparison of simulated discharge results with an observation discharge. Research began with delineation DEM, HRU formation, simulation, calibration, and validation. The R² value for daily data on modified SWAT was 0,725. It was better than the original SWAT and SWAT with Pothole, which were 0,706 and 0,708 respectively. Likewise, the NSE value for daily data on modified SWAT was 0,721, on original SWAT and on SWAT with Pothole was 0,668 and 0,685 respectively. The analysis result showed that the modified SWAT provide good discharge prediction results, indicated by relatively high R2 and NSE values.Keywords: hydrological analysis,modified SWAT, paddy field, pothole, SWAT
STUDI EKSPERIMENTAL GAYA POTONG TANAH DAN FREKUENSI GETARAN BAJAK SAAT PEMOTONGAN TANAH PADA OPERASI PENGOLAHAN TANAH Soeharsono -; Radite Pas; Asep Sapei; Tieneke Mandang; Wawan Hermawan
Teknotan: Jurnal Industri Teknologi Pertanian Vol 5, No 1 (2011)
Publisher : Fakultas Teknologi Industri Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Dalam tulisan ini akan dibahas tentang hasil-hasil eksperimental membajak tanah pada soil bin. Tujuannya adalah mencari besar dan frekuensi gaya potong tanah sehingga dapat dibuat pendekatan pendekatan model matematis dari gaya potong tanah. Hasil ini nantinya akan digunakan untuk merancang sebuah pegas elastis dari bajak getar jenis self excited vibration. Soil bin berukuran panjang 1.2 m, lebar 0.3 m dan tinggi 0.4 m. diisi dengan lapisan tanah jenis clay loam soil setebal 19-20 cm. Di dasar Soil bin dibuat lapisan hardpan setebal 10-11 cm dengan tahanan penetrasi sekitar 2.75 Mpa. Digunakan dua jenis chisel plough yaitu chisel plough dengan batang lurus tegak dan chisel plough dengan batang lurus miring. Kedalaman operasi diatur konstan sekitar 15 cm sedangkan tebal lapisan hardpan yang dibongkar adalah sekitar 5-6 cm Kecepatan membajak divariasikan pada kecepatan sekitar 0.108, 0.158, 0.212 dan 0.265 m/dt. Hasil-hasil menunjukkan bahwa chisel plough bekerja pada frekuensi pemotongan tanah yang rendah sekitar 1.45-2.0 Hz. Gaya potong tanah untuk chisel plough dengan batang lurus tegak lebih besar dibandingkan dengan gaya potong tanah untuk chisel plough dengan batang lurus miring.Gaya potong tanah semakin besar dan linier dengan semakin besarnya kecepatan membajak, sedangkan profilgaya potong tanahnya berupa fungsi matematiks yang stochastics dan dimodelkan sebagai fungsi periodik. Kata kunci: Draught force, Cutting frequency, Soil bin, Chisel plough
Perubahan Pola Penyebaran Kadar Air Media Tanam Arang Sekam dan Pertumbuhan Tanaman Kangkung Darat (Ipomoea reptans Poir.) pada Pemberian Air Secara Terus Menerus dengan Irigasi Tetes Asep Sapei; Irma Kusmawati
Jurnal Keteknikan Pertanian Vol. 17 No. 2 (2003): Buletin Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.017.2.%p

Abstract

Drip/trikle irrigation is an irrigation method, which gives high efficiency, high effectivity and assuraes high productivity/yield. This method, is often used for hortivulture and vegetable. The objectives of this research is to study the effect of drip irrigation by continuous water application using 1 and 2 emitters on water distribution and crop growth.The result show that irrigation water by using 2 emitter was spread horizontally more, gave taller crops and more leaves that that using 1 emitter. In general, the effect of continuous water application was beter than intermittent water application.
THE APPLICATION OF TRANSMITTER AND RECEIVER TO DETECT THE PLOUGHING DEPTH M. Hariansyah; Setiawan R. P.A; Desrial .; Made D.S; Asep SApei
JUTEKS Vol 2, No 2 (2015)
Publisher : Department of Elektro Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (557.557 KB) | DOI: 10.32832/juteks.v2i2.397

Abstract

Transmitter and receiver were applied in this research to detect the mole plough. Transmitter was placed outside the farm while receiver was attached on the mole plough construction and then pulled by tractor. Mole plough was used to create drainage channel. However, creating drainage channel at slope of 0,02% is a difficult task as mole ploughing depth is strongly affected by the contour of soil surface. The objective of this research was to design a device which had ability to control mole ploughing depth. Transmitter used a modified green laser beam which used to measure the profile of soil surface. Receiver was used to receive signal. Light receiver sensor used photodiode which formed into matrix sized of (1x8), every row consisted of 40 sensor of photodiode with 8 levels of depth. When transmitter was activated, green laser beam transmitted 1.206 Hz frequency and can be transmitted for maximum 50 m. When photodiode sensor received green laser beam at allowable detection range, the light beam was transmitted to Arduino microcontroller. There were two microcontrollers used to control two units of relay. The first microcontroller was used to detect the contour level of soil surfaceand second microcontroller was used to measure the mole ploughing depth. The research found that there was deviation of mole ploughing depth between setpoint and field testing result.