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MODEL SIMULASI TRANSFER HUJAN-ALIRAN PERMUKAAN (MODEL H2U) UNTUK PENDUGAAN DEBIT DAERAH ALIRAN SUNGAISIMULATION MODEL OF RAINFALL-RUNOFF TRANSFER/H2U MODEL FOR CALCULATE DISCHARGE OF WATERSHED Heryani, Nani; Pawitan, Hidayat; Irianto, Gatot
Agromet Vol. 16 No. 1 & 2 (2002): December 2002
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1244.846 KB) | DOI: 10.29244/j.agromet.16.1 & 2.76-87

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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
Agromet Vol. 17 No. 1 & 2 (2003): June 2003
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1314.213 KB) | DOI: 10.29244/j.agromet.17.1 & 2.01-11

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TEKNOLOGI KONSERVASI TANAH DAN AIR UNTUK MENCEGAH DEGRADASI LAHAN PERTANIAN BERLERENG Sutrisno, Nono; Heryani, Nani
Jurnal Penelitian dan Pengembangan Pertanian Vol 32, No 3 (2013): September 2013
Publisher : Pusat Perpustakaan dan Penyebaran Teknologi Pertanian

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Abstract

Degradasi atau penurunan kualitas lahan merupakan isu globalutama pada abad ke-20 dan masih menjadi isu penting dalam agendainternasional pada abad ke-21. Erosi tanah, kelangkaan air, energi,dan keanekaragaman hayati menjadi permasalahan lingkunganglobal sejalan dengan meningkatnya jumlah penduduk. Erosi tanahmenyebabkan degradasi lahan karena dapat menurunkan kualitastanah serta produktivitas alami lahan pertanian dan ekosistemhutan. Di Indonesia, laju erosi tanah pada lahan pertanian denganlereng 330% tergolong tinggi, berkisar antara 60625 t/ha/tahun,padahal banyak lahan pertanian yang berlereng lebih dari 15%,bahkan lebih dari 100% sehingga erosi tanah tergolong sangat tinggi.Konservasi tanah dan air mengarah kepada terciptanya sistempertanian berkelanjutan yang didukung oleh teknologi dan kelembagaanserta mampu meningkatkan kesejahteraan masyarakat danmelestarikan sumber daya lahan serta lingkungan. Upaya untukmengurangi degradasi lahan dapat dilakukan melalui: 1) penerapanpola usaha tani konservasi seperti agroforestri, tumpang sari, danpertanian terpadu, 2) penerapan pola pertanian organik ramahlingkungan, dan 3) peningkatan peran serta kelembagaan petani.
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 (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

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

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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
DISAIN TEKNOLOGI PANEN HUJAN UNTUK KEBUTUHAN RUMAHTANGGA: Studi Kasus di Daerah Istimewa Yogyakarta dan Nusa Tenggara Barat Heryani, Nani; Sudarman, Kurmen; Talaohu, Sidiq H
Jurnal Pengkajian dan Pengembangan Teknologi Pertanian Vol 16, No 3 (2013): November 2013
Publisher : Balai Pengkajian dan Pengembangan Teknologi Pertanian

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Abstract

ABSTRACT The Design of Rain Harvesting Technologies for Household Use: a Case Study in Yogyakarta Special Regionn and West Nusa Tenggara. Many parts of the world, including Indonesia, has been facing water shortage problems while water demand continues to grow. Rainfall harvesting could change the utilization pattern of rainfall by spatially and temporally, which would supply humankind with steady water sources. Characterized by simple operation, rainwater-harvesting techniques for domestics purposes have a great potential to be used also for irrigations. Rainfall harvesting could be conserved of water use from other water resources, while water use efficiency could be increased. The experiments were conducted at Selopamioro Village (Special Region of Yogyakarta ) and Banyu Urip Village (West Nusa Tenggara) in 2009 and 2011, respectively. The aims of the experiments were to develop rainfall harvesting technology and to design the criteria of techniques of rainfall harvesting the houshold purposes. The experiments   were conducted through several steps as follow: (i) characterization of the area of experiments through rainfall and climate data collections during the last 10 years, the number of family members of the water users, water consumption/person/day, (ii) the installation of water storage tanks and distribution of pipes, and, (iii) data analysis of the potential of rainwater that could be harvested and the determination of the storage tank capacity. Results of the experiments showed that the potential of water that could be harvested at two sample houses in Selopamioro were 5.,8 and 78.5 m3/year respectively, while in three sample houses in Lombok were 74.2; 25.4 and 41.6 m3/year  respectively. To meet the needs of water during the dry season, the maximum capacity of the reservoir should be made at two sample houses in Selopamioro were 19.5 and 28.4 m3 respectively, while those at three sample houses in Lombok were 37.06; 8.40 and 20.08 m3 respectively. Keywords : Design criteria, rainfall harvesting, household, droughtABSTRAK Sejak beberapa dekade terakhir di beberapa negara, termasuk Indonesia, sering terjadi kekeringan. Sementara kebutuhan air cenderung semakin meningkat. Panen hujan dapat mengubah pola pemanfaatan curah hujan secara spasial maupun temporal untuk memenuhi kebutuhan rumah tangga dengan sumber air relatif tetap. Dengan metode sederhana, teknik panen hujan disamping untuk memenuhi kebutuhan rumah tangga, juga dapat digunakan untuk irigasi. Penelitian dilaksanakan di Desa Selopamioro (Daerah Istimewa Yogyakarta) dan Desa Banyu Urip (Nusa Tenggara Barat) berturut-turut pada tahun 2009 dan 2011. Tujuan penelitian untuk mengembangkan teknologi panen hujan dan merancang  kriteria panen hujan untuk kebutuhan rumahtangga. Penelitian dilakukan melalui beberapa tahapan yaitu (i)  karakterisasi wilayah penelitian melalui pengumpulan data curah hujan dan iklim 10 tahun terakhir, jumlah anggota keluarga pengguna air, konsumsi air untuk kebutuhan rumah tangga/orang/hari, (ii) instalasi/pembuatan bangunan panen hujan berupa tangki penampung air dan pipa pendistribusiannya, dan (iii) analisis data meliputi potensi air hujan yang dapat dipanen dan penentuan kapasitas penampung air. Hasil penelitian menunjukkan bahwa potensi air yang dapat dipanen di dua rumah contoh di Selopamioro berturut-turut 53,8 dan 78,5 m3/tahun, sedangkan di tiga rumah contoh di Lombok berturut-turut 74,2; 25,4 dan 41,6 m3/tahun. Untuk memenuhi kebutuhan air selama musim kemarau, kapasitas maksimum tampungan yang harus dibuat di dua rumah contoh di Selopamioro berturut-turut 19,5 dan 28,4 m3, sedangkan di tiga rumah contoh di Lombok berturut-turut 37,06; 8,40 dan 20,08 m3. Kata kunci : Rancang bangun, panen hujan, rumah tangga, kekeringan
TOLERANSI TANAMAN KEDELAI TERHADAP CEKAMAN AIR : AKUMULASI PROLIN DAN ASAM ABSISIK DAN HUBUNGANNYA DENGAN POTENSIAL OSMOTIK DAUN DAN PENYESUAIAN OSMOTIK Sopandie, Didy; Hamim, ,; Jusuf, Muhammad; Heryani, Nani
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 24 No. 1 (1996): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (991.078 KB) | DOI: 10.24831/jai.v24i1.1616

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In this experiment. the changes on leaf osmotic potential and accumulation of proline and abscisic acid were identified from drought-tolerant and drought - sensitive soybean genotypes. Three drought - tolerant (Mlg 2805, Mlg 2984 and Mlg 2999) and two sensitive soybean genotypes (Mlg 2510 and Mlg 3541) were subjected to drought condition created by regulating water supply in greenhouse.  The results revealed that exposing plants to drought stress brought about a decrease of leaf osmotic potential. The decrease of which was greater in drought-tolerant genotypes (6.91 to 10.11 bars) than in sensitive genotypes (0.55 to 0.69 bars). The decreasing of leaf osmotic potential was followed with increasing praline accumulation, especialy for Mlg 2805. Only Mlg 2805 showed the significant ABA accumulation when the plants were subjected to drought stress. It is suggested that the drought tolerance was associated with the reduction of leaf osmotic potential (osmotic adjusment) in which proline might play an important role. The role of ABA could not be clarified since there had been a great variability in ABA content of all tolerant genotypes.
PEMANENAN AIR UNTUK MENCIPTAKAN SISTEM USAHATANI YANG BERKELANJUTAN (PENGALAMAN DI WONOSARI, DAERAH ISTLMEWA YOGYAKARTA) Heryani, Nani; Irianto, Gatot; Pujilestari, Nurwindah
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 30 No. 2 (2002): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1025.915 KB) | DOI: 10.24831/jai.v30i2.1491

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Rainfall-runoff harvesting on upland farming system and its effect to water production function and farming system sustainability were discussed in this paper. Water production function indicated the exchange of the total rainfall to rainfall net. The result of the experiment showed that measurement of the upland productivity will be reached through: (I) minimum  fluctuation of water availability, (2) maximum water storage capacity of natural or artificial watershed; (3) optimum water use efficiency and variability of commodity. Rainfall-runoff harvesting through modification of hydrology characteristics by building channel reservoir on the river stream retained water in the rainy season and will distribute water in the dry season. Key words: Wafer harvesting, Channel reservoir, Sustainable upland farming system
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

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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.
Dinamika Aliran Bawah Permukaan pada Berbagai Kandungan Kimia Air secara Spasial dan Temporal di dalam Daerah Aliran Sungai Heryani, Nani; Pawitan, Hidayat; Purwanto, M. Yanuar J.; Subagyono, Kasdi
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 37, No 1 (2013)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.2017/jti.v37i1.6336

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Abstrak. Menentukan jalur aliran yang dominan di dalam daerah aliran sungai dan bagaimana air mengalir berpengaruh terhadap terhadap kandungan kimia airnya merupakan hal penting dalam memahami proses limpasan. Saat ini pendekatan secara hidrometrik dan hidrokimia telah banyak dilakukan untuk memahami perbedaan persepsi antara pendekatan menggunakan model dengan konsep formal dalam mempelajari proses limpasan. Tujuan penelitian ini adalah mempelajari dinamika aliran bawah permukaan selama proses limpasan dan mempelajari keragaman ketersediaan kandungan kimia air secara spasial dan temporal. Penelitian dilakukan melalui beberapa tahapan yaitu: karakterisasi wilayah penelitian, pengamatan kedalaman batuan (bedrock), pemasangan peralatan pengamatan hidrometrik dan hidrokimia, dan pengambilan sampel air untuk analisis kimia. Hasil penelitian menunjukkan bahwa dinamika perilaku aliran bawah permukaan mempengaruhi keragaman kandungan kimia air secara spasial dan temporal. Perubahan besaran dan arah aliran bawah permukaan di wilayah lereng disebabkan adanya perubahan konsentrasi kimia air secara spasial dan temporal. Abstract. Defining the dominant flow path and how the water undergoes chemical changes is critical in understanding the process of runoff. In recent decades, hydrometric and hydro-chemical approaches have been done much to understand the differences in perception between the models and the formal concepts of runoff processes. The aims of the research were to study the subsurface flow dynamics during runoff process and the spatial and temporal variation of water chemistry. The research was conducted through several stages, i.e. characterization of the study area, observation of bedrock depth, installation of hydrometric and hydro-chemical equipment and water sampling and analysis. The results showed that the dynamics of subsurface flow behavior affected the diversity of water chemistry spatially and temporally. Changes in the amount and direction of the subsurface flow in sloping area were caused by the change in solute concentration spatially and temporally.
PENYUSUNAN MODEL KONSEPTUAL HUBUNGAN ANTARA PROSES LIMPASAN DENGAN PENCUCIAN UNSUR HARA Heryani, Nani
JURNAL SUMBER DAYA AIR Vol 9, No 1 (2013)
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1395.982 KB) | DOI: 10.32679/jsda.v9i1.361

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Model konseptual hubungan proses aliran air dengan ketersediaan air dalam DAS hanya mencakup proses di dalam DAS yang memengaruhi kimia air atau yang memberi pertanda kimia dalam aliran. Penelitian dilakukan di DAS mikro Cakardipa, DAS Ciliwung Hulu, Jawa Barat. Tujuan penelitian yaitu menyusun model konseptual hubungan antara proses limpasan atau aliran air dengan ketersediaan air dan pencucian hara. Penelitian dilakukan melalui beberapa tahapan yaitu: pemasangan jaringan alat pengamatan hidrokimia dan hidrometrik, analisis separasi hidrograf secara geokimia dan hidrometrik, analisis dinamika aliran bawah permukaan, analisis hubungan konsentrasi unsur hara (hidrokimia) dan debit. Berdasarkan hasil-hasil analisis tersebut disusun model konseptual hubungan antara proses aliran air dengan ketersediaan air di dalam DAS dan pencucian hara. Hasil penelitian menunjukkan bahwa berdasarkan separasi hidrograf secara geokimia terdapat kontribusi air tanah (groundwater) sebesar 47,3%, air lahan(soil water) sebesar 28,0%, dan curah hujan sebesar 24,7%, sedangkan separasi hidrograf secara hidrometrik menunjukkan bahwa dengan curah hujan sebesar 46,5 mm selama 8 jam 35 menit menghasilkan debit dengan volume sebesar 2.377 m3. Potensial air dan jalur aliran tempat air mengalir juga memengaruhi perbedaan konsentrasi kimia air yang melalui lereng hingga ke sungai. Akumulasi unsur hara cenderung tinggi pada bagian hilir DAS. Hubungan antara konsentrasi unsur kimia air dengan debit adalah linier, dalam hal ini terjadi penurunan unsur hara pada saat terjadi peningkatan debit.