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PENGARUH SIFAT HUJAN DAN KERAKTERISTIK BIOFISIK DAS TERHADAP DEBIT BANJIR DAS KALIGARANG, SEMARANGEFFECT OF WATERSHED RAINFALL AND BIOPHYSICS CHARACTERISTIC TOWARD FLOOD DEBIT OF KALIGARANG WATERSHED, SEMARANG Rejekiningrum, Popi; Kartiwa, Budi
Jurnal Agromet Indonesia Vol 14, No 1 & 2 (1999): June 1999
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

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PEMODELAN DEBIT ALIRAN PERMUKAAN BERDASARKAN APLIKASI KONSEP HORTON DAN HIDROGRAF SATUAN PADA DAS MIKRO KERTEK WONOSOBO, JAWA TENGAHDISCHARGE RUN OFF SIMULATION MODEL BASED ON APPLICATION OF HORTON´S CONCEPT AND UNIT HYDROGRAPH ON KERTEK ... Kartiwa, Budi; Heryani, Nani
Jurnal Agromet Indonesia Vol 17, No 1 & 2 (2003): June 2003
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

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Pemberian Mulsa dalam Budidaya Cabai Rawit di Lahan Kering: Dampaknya terhadap Hasil Tanaman dan Aliran Permukaan Heryani, Nani; Kartiwa, Budi; Sugiarto, Yon; Handayani, Tri
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 41, No 2 (2013): JURNAL AGRONOMI INDONESIA
Publisher : Bogor Agricultural University

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The problem of plant cultivation in dry upland with slope of >15° is the high soil erosion that result in high rate of sedimentation in the downstream of watershed. One way of overcoming this problem is by utilization of mulches. The objective of the experiment was to study the effect of mulch application on growth and yield of chilli (Capsicum frutescensL.).The experiment was conducted from January 2010 until June 2011 at Selopamioro micro watershed at Imogiri Subdistrict, Bantul District, Special Region of Yogyakarta. The experiment was arranged in a randomized complete block design consisted of four mulch treatments (rice straw, litter, plastic/silver black polyethylene, and without mulch) and four replications. The observed variables were the growth parameter (plant height), soil moisture content, soil temperature, and yield (number and weight of chilli). The result showed that application of mulches did not affect plant height and yield of chilli, but increased number of fruit. The best mulch for chilli crops in upland area was rice straw, that yielded the highest increase in number of fruit. Mulch as a soil conservation practice reduced runoff coefficient, while dicharge and extended of the reponse time were reduced only at rainfall less than 21 mm.Keywords: Capsicum frutescensL.,mulch, runoff, upland area
Efek Kombinasi Sistem Pengaturan Air Irigasi dengan Pemangkasan Daun Bawah Terhadap Efisiensi Air dan Radiasi, Serta Produktivitas Tanaman Jagung pada Lahan Kering Beriklim Kering Koesmaryono, Yonny; Haruna, .; Kartiwa, Budi; Impron, .
Jurnal Ilmu Pertanian Indonesia Vol 17, No 3 (2012): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Study on the effect of dose management on water irrigation and the effect of pruning corn lower leaves on productivity of Lamuru variety grown on dry land of dry climate area has been done. The experiment was organized at Naibonat Experimental Station, East Kupang Subdistrict, Kupang, East Nusa Tenggara, from June to October 2011. The area used was 72 × 32 m using split plot design methods, employing two treatments. The first treatment was conducted on the main plot with water irrigation dose given 100, 80, and 60% the dose control was according to the farmer’s customary. The second treatment was applied by pruning or not pruning the lower leaves at the generative phase on the determined submain plot. The result showed that dose of water irrigation of 80 and 60% gave significant effect on corn productivity, that is 7.3 and 5.3 ton/ha, but not significant to the control (6.6 ton/ha). On the other hand, the treatment with and without leaf pruning did not give significant effect on the growth component because pruning was conducted during the generative phase. The Anova test result of corn productivity was not significantly different between the treatment of with and without pruning. The treatment of 80% dose of water irrigation could save water until 842 m3 or 20% per planting season per hectare. Meanwhile, the farmer’s customary wasted the water up to 2.105 m3 or 50% per planting season per hectare. Based on the results, the optimizing of water irrigation interval is seven times more efficient in one planting period as compared to 14 irrigation times in one planting period. Keywords: corn, irrigation, productivity, pruning
DINAMIKA ELEVASI MUKA AIR PADA LAHAN DAN SALURAN DI LAHAN GAMBUT Runtunuwu, Eleonora; Kartiwa, Budi; Kharmilasari, Kharmilasari; Sudarman, Kurmen; Nugroho, Wahyu Tri; Firmansyah, Anang
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 21, No 2 (2011)
Publisher : Indonesian Institute of Sciences

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ABSTRAK Reklamasi gambut untuk pertanian memerlukan jaringan drainase makro yang dapat mengendalikan tata air dalam satu wilayah dan drainase mikro untuk mengendalikan tata air di tingkat lahan. Elevasi muka air harus dipertahankan secara optimal. Tidak terlalu dalam agar tanaman tidak mengalami kekeringan dan tidak terlalu dangkal agar tanaman tidak tergenang. Untuk itu diperlukan bangunan pengendali berupa pintu air di setiap saluran. Pintu air berfungsi untuk mengatur muka air tanah supaya tidak terlalu dangkal dan tidak terlalu dalam, sehingga kelestarian gambut dapat terjaga. Pemasangan pintu air baik letak maupun jumlahnya perlu diawali dengan mengetahui fluktuasi air di saluran dan lahan. Tulisan ini bertujuan untuk mempelajari dinamika elevasi muka air pada lahan dan saluran dan keterkaitannya dengan curah hujan di lahan gambut. Untuk mencapai tujuan tersebut telah dilakukan penelitian di Desa Jabiren, Kecamatan Jabiren Raya, Kabupaten Pulang Pisau, Provinsi Kalimantan Tengah. Penelitian dilaksanakan sejak April sampai dengan Oktober 2011. Analisis difokuskan untuk memahami karakteristik hujan, karakteristik hidrologi, elevasi muka air lahan dan saluran, hidrotopografi, serta hubungan curah hujan dan elevasi muka air. Data dasar ini sangat dibutuhkan sebagai informasi peringatan dini agar kejadian air berlebihan atau terbatas di lahan gambut dapat diantisipasi dengan baik.
Efek Kombinasi Sistem Pengaturan Air Irigasi dengan Pemangkasan Daun Bawah Terhadap Efisiensi Air dan Radiasi, Serta Produktivitas Tanaman Jagung pada Lahan Kering Beriklim Kering Koesmaryono, Yonny; Haruna, .; Kartiwa, Budi; Impron, .
Jurnal Ilmu Pertanian Indonesia Vol 17, No 3 (2012): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (386.983 KB)

Abstract

Study on the effect of dose management on water irrigation and the effect of pruning corn lower leaves on productivity of Lamuru variety grown on dry land of dry climate area has been done. The experiment was organized at Naibonat Experimental Station, East Kupang Subdistrict, Kupang, East Nusa Tenggara, from June to October 2011. The area used was 72 × 32 m using split plot design methods, employing two treatments. The first treatment was conducted on the main plot with water irrigation dose given 100, 80, and 60% the dose control was according to the farmer?s customary. The second treatment was applied by pruning or not pruning the lower leaves at the generative phase on the determined submain plot. The result showed that dose of water irrigation of 80 and 60% gave significant effect on corn productivity, that is 7.3 and 5.3 ton/ha, but not significant to the control (6.6 ton/ha). On the other hand, the treatment with and without leaf pruning did not give significant effect on the growth component because pruning was conducted during the generative phase. The Anova test result of corn productivity was not significantly different between the treatment of with and without pruning. The treatment of 80% dose of water irrigation could save water until 842 m3 or 20% per planting season per hectare. Meanwhile, the farmer?s customary wasted the water up to 2.105 m3 or 50% per planting season per hectare. Based on the results, the optimizing of water irrigation interval is seven times more efficient in one planting period as compared to 14 irrigation times in one planting period.
KRITERIA RANCANG BANGUN SISTEM PANEN HUJAN DAN ALIRAN PERMUKAAN: STUDI KASUS DAS CISADANE HULU Heryani, Nani; Adi, Setyono Hari; Kartiwa, Budi
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 23, No 2 (2013)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1853.258 KB) | DOI: 10.14203/risetgeotam2013.v23.76

Abstract

Abstrak Banjir dan kekeringan merupakan dua fenomena alam yang dapat mengancam sistem produksi pertanian dan ketahanan pangan nasional. Secara kuantitatif masalah banjir terjadi akibat kesenjangan dua hal yaitu masalah distribusi dan kapasitas (storage). Distribusi curah hujan yang tidak merata secara spasial dan temporal menyebabkan kelebihan air di musim hujan dan kekurangan air di musim kemarau. Teknik konservasi tanah dan air dapat dilakukan melalui berbagai cara antara lain melalui  pemanenan air hujan dan aliran permukaan menggunakan embung, dam parit, dan lain-lain. Penelitian dilaksanakan di Sub DAS Cisadane Hulu pada Maret sampai dengan Nopember 2011. Tujuan penelitian yaitu: 1) mengkarakterisasi kondisi biofisik wilayah untuk penilaian kesesuaian aplikasi sistem panen hujan dan aliran permukaan 2) mengembangkan model pengelolaan air melalui panen hujan dan aliran permukaan dan mengantisipasi banjir dan kekeringan, 3) mengembangkan kriteria rancang bangun sistem panen hujan dan aliran permukaan untuk mengurangi risiko banjir dan kekeringan.. Hasil penelitian menunjukkan bahwa dam parit  dapat dibangun di sub DAS Cikereteg, DAS Cisadane sebanyak 41 buah dapat mengairi target irigasi seluas 50,4 ha. Sedangkan di seluruh DAS Cisadane jika dibangun sebanyak 159 buah akan dapat menurunkan debit puncak sebesar 4,5 m3/detik.  Pembangunan dam parit di sub DAS Cikereteg DAS Cisadane Hulu tergolong sesuai secara teknis maupun sosial ekonomi.
Pemberian Mulsa dalam Budidaya Cabai Rawit di Lahan Kering: Dampaknya terhadap Hasil Tanaman dan Aliran Permukaan Heryani, Nani; Kartiwa, Budi; Sugiarto, Yon; Handayani, Tri
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 41, No 2 (2013): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (437.894 KB) | DOI: 10.24831/jai.v41i2.7520

Abstract

The problem of plant cultivation in dry upland with slope of >15° is the high soil erosion that result in high rate of sedimentation in the downstream of watershed. One way of overcoming this problem is by utilization of mulches. The objective of the experiment was to study the effect of mulch application on growth and yield of chilli (Capsicum frutescensL.).The experiment was conducted from January 2010 until June 2011 at Selopamioro micro watershed at Imogiri Subdistrict, Bantul District, Special Region of Yogyakarta. The experiment was arranged in a randomized complete block design consisted of four mulch treatments (rice straw, litter, plastic/silver black polyethylene, and without mulch) and four replications. The observed variables were the growth parameter (plant height), soil moisture content, soil temperature, and yield (number and weight of chilli). The result showed that application of mulches did not affect plant height and yield of chilli, but increased number of fruit. The best mulch for chilli crops in upland area was rice straw, that yielded the highest increase in number of fruit. Mulch as a soil conservation practice reduced runoff coefficient, while dicharge and extended of the reponse time were reduced only at rainfall less than 21 mm.Keywords: Capsicum frutescensL.,mulch, runoff, upland area
Hydrological Model of Upstream Aih Tripe Watershed for Drought and Flood Prediction NASRULLAH, .; KARTIWA, BUDI
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 29 (2009): Juli 2009
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (845.028 KB) | DOI: 10.2017/jti.v0i29.236

Abstract

The objectives of this research is to analyze biophysic caharacteristics of Upstream Aih Tripe Watershed and to predict discharge characteristic of Aih Tripe River based on hydrological models application. Modified H2U model is applied to predict instantaneous discharge, meanwhile GR4J model is applied to predict daily discharge. Upstream Aih Tripe characteristics are,1,115.2 km2 wide, stretch watershed type (Gravelius index 4.31), equivalent length (L) 252.40 and equivalent width (l) 4.42, parallel drainage pattern, maximum river order is 5 and drainage dencity 1.37 m m-2, global slope index (Ig) 2.0 and specific high different (Hg) 0.06. Instantaneous discharge simulation results at dry season are: instantaneous maximum discharge is 364.8 m3 s-1 and time to peak 4 hours, rainfall maximum intensity is 29 mm hour-1, rainfall is 45.9 mm with duration 5 hours. In rainy season, maximum discharge is 605.2 m3 s-1 and time to peak 2 hours, rainfall maximum intensity is 40.8 mm hour-1, rainfall is 73.2 mm with duration 7 hours. Maximum discharge during El Nino condition is 131.4 m3 s-1 (30 September) and minimum dischargeis 8.2 m3 s-1 (31 March). Discharge simulation during La Nina, maximum discharge is 328.3 m3 s-1 (11 December) and minimum discharge is 8.5 m3 s-1 (5 October).
Alternative Method for Calculating Runoff Coefficient Based on Discharge Simulation Model by Applying Unit Hydrograph Concept (Kali Kripik Sub Watershed Case Study) KARTIWA, BUDI; IRIANTO, GATOT
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 19 (2001): Desember 2001
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (237.84 KB) | DOI: 10.2017/jti.v0i19.301

Abstract

Comparison of two method on calculating runoff coefficient (Cr), is discussed in this paper i.e. classical method and alternative method. The first one calculates Cr based on the hydrograph separation analyses, and the second one based on the discharge model simulation by applying unit hydrograph concept. The classical Cr values is calculated using simple method and the alternative Cr values is calculated using H2U (Hydrogramme Unitaire Universel) transfer rainfall-discharge model, for 47 rainfall and discharge events from September 1998 to March 1999 on Kripik sub Watershed. The H2U model calculates discharge based on convolution product between excess rainfall and hydrological network density that was represented by probability density function. The Cr value according to this model is determined when the Cr is resulting the best discharge simulation. During the period of September 1998 to March 1999, the classical Cr value varied between 2,8 to 69,1%, while alternative Cr between 1,0 to 48,8%. The smallest and the biggest differences between classical and alternative Cr values were 0,3% and 26,5%, respectively. According to regression analyses and Nash-Sutcliffe criterion, the coefficient of determination (R2) and the coefficient of efficiency (F) were 0,9312 and 0,6829, respectively. Statistically, these values indicate that the alternative Cr value was similar to classical one.