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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
Agromet Vol. 14 No. 1 & 2 (1999): June 1999
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1513.558 KB) | DOI: 10.29244/j.agromet.14.1 & 2.13-24

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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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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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1353.56 KB) | DOI: 10.14203/risetgeotam2011.v21.47

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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.
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
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.
APPLICATION OF MAPDAS MODEL FOR MICRO-WATERSHEDS HYDROLOGICAL CHARACTERISTICS SIMULATION DOMINATED BY OIL PALM PLANTATION: APLIKASI MODEL MAPDAS UNTUK SIMULASI KARAKTERISTIK HIDROLOGI DAS MIKRO YANG DIDOMINASI PERKEBUNAN SAWIT Pidin, Faqihna; Tarigan, Suria Darma; Kartiwa, Budi
Jurnal Ilmu Tanah dan Lingkungan Vol 21 No 1 (2019): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (317.917 KB) | DOI: 10.29244/jitl.21.1.30-35

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Perubahan penggunaan lahan dalam ekspansi perkebunan berpotensi menyebabkan degradasi tanah, yang dapat menyebabkan kekeringan di musim kemarau dan banjir di musim hujan. Model hidrologi sangat penting untuk mensimulasikan fluktuasi debit dari dampak perubahan penggunaan lahan diperkebunan. Penelitian ini menggunakan Model MAPDAS untuk tujuan simulasinya. Model MAPDAS menggunakan 4 (empat) parameter input utama simulasi, meliputi: koefisien aliran permukaan (Kr), waktu jeda, kecepatan aliran jaringan hidrografi, dan kecepatan aliran lereng. Tujuan dari penelitian adalah untuk, 1) Menguji akurasi hasil hidrograf aliran permukaan pada Model MAPDAS pada metode penentuan hujan efektif; dan 2) melakukan kajian karakteristik hidrologi DAS mikro khususnya aliran permukaan dengan lahan yang didominasi tanaman kelapa sawit menggunakan Model MAPDAS pada 3 skenario penentuan hujan efektif. Hasil penelitian menunjukkan bahwa penggunaan Model MAPDAS dengan input curah hujan berdasarkan metode koefisien runoff (Kr), indeks infiltrasi (F) dan SCS-CN didapat nilai Kr berkisar antara 12%-70%. Model MAPDAS mampu mensimulasikan karakteristik hidrologi dengan baik. Dilihat dari nilai hasil uji CE lebih besar dari 0.7, yang menyatakan bahwa model ini memiliki akurasi yang tinggi sampai sangat tinggi. Kata kunci: Model MAPDAS, Koefisien aliran permukaan (Kr), Penentuan hujan efektif
PREDICTING DISCHARGE FROM AGRICULTURAL CATCHMENT TO SUPPORT LAND AND WATER MANAGEMENT IN SINGKARAK BASIN, WEST SUMATRA SUBAGYONO, KASDI; 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 | DOI: 10.21082/jti.v0n29.2009.%p

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Limited hydrological data in Paninggahan sub catchment in Singkarak basin has resulted in inappropriate land management practices for farming system development. Predicting stream flow using an appropriate hydrological model is critical for a catchment with limited data recording. The present study has been conducted from January 2006 to December 2007. The objective of this study is to characterize hydrological condition of the catchment and to predict river flow for supporting design of landand water management options. To some extend, the study is to provide inputs in negotiation of farmers community with other stakeholders in the Singkarak basin. An automatic water level recorder (AWLR) and an automatic weather station (AWS) have been installed in the catchment to record hydro-meteorological data in order to calibrate hydrological model for predicting river flow. An instantaneous discharge model based on Geomorphological Instantaneous Unit Hydrograph (H2U) and a daily discharge model of GR4J were used to predict the river flow. The instanteneous hydrological data suggested that stream discharge sharply increased during onset rain and implying that the draining water was dominated by rapid flow. After peak storm has been reached, the water was slowly released to the river the one is typical hydrological process for disturbed catchments where rainfall water may no longer be retained in thecatchment. Application of both hydrological models in Paninggahan sub catchment during a period of March to April 2006 has given an appropriate result. The GR4J model has been calibrated and has given the value of similarity coefficient of 87.9%, while calibration of H2U model applied for storm event and has given the value of similarity coefficient of 96%. Thesucceed of predicting discharge using both models is valuable to support planning program in land and water management for farming system development in the Singkarak basin.
Institutional Development Of Irrigation Management Based On The Local Wisdom In Indonesia Rejekiningrum, Popi; Kartiwa, Budi
JOURNAL OF SOCIOECONOMICS AND DEVELOPMENT Vol 1, No 1 (2018): Journal of Socioeconomics and Development
Publisher : Widyagama University of Malang (UWG Press)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (453.657 KB) | DOI: 10.31328/jsed.v1i1.535

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During 1980-1997, the management of water resources was done with a supply-driven approach.  This approach results in the expensive maintenance of water resources and the disregarded resources utilization of environmental sustainability.  Since 1998, The Government of Indonesia began to reform institutional irrigation with the financing supported by the World Bank. However, the institutional reforms of the irrigation have not yet reflected the exact changes as expected. Therefore, it is necessary to study the process of strengthening the institutional management of irrigation based on the local wisdom through the inventory of history series of irrigation management policy and empowerment of capacity building and institutional program of irrigation management. This paper presents an effort to develop the institutional irrigation management by exploring the local wisdom in the community. It can be used as a guide for future sustainable management of irrigation. JEL Classification: B30, Q15, Q25
Variasi temporal dan spasialtinggi muka air tanah gambut lokasi demplot ICCTF jabiren kalimantan tengah Sosiawan, Hendri; Kartiwa, Budi; Nugroho, Wahyu Tri; Syahbuddin, Haris
Jurnal Ilmu Tanah dan Air Vol 14, No 2 (2017)
Publisher : Prodi Agroteknologi, Fakultas Pertanian, UPN "Veteran" Yogyakarta

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

Abstract

As the swamp ecosystem, the presence of water in the peat is strongly influenced by the characteristic of rain and river tide. Thus the role of rivers and canals in cultivated peatlands is especially important to maintain the optimal water level fluctuations for crops. Demplot ICCTF in Jabiren, Pulang Pisau District, Central Kalimantan peat land was cultivated for rubber plant community,located beetwen the river Jabiren (secondary canal) and tertiary canal. The objective is to determine the peatland water level fluctuations both temporally and spatially. To achieve this objective, these activities have been implemented i.e: topographic survey, installation of piezometer and staff gauge, and water level observation. Topographic survey has been carried out to map land elevation, position and elevation of water level observation device and water infrastucture. Observation of the spatial dynamics of ground water level was done manually, and the temporal dynamic of water level in canal inlet and outlet observed automatically using loggers. Results shows that the groundwater level fluctuations have a simillar tendency with water level of the river and tertiary canal. Spatial variation of groundwater level elevation shows that the highest groundwater level was the farthermost of piezometer from the canal or river. Hydrotopograpy land shows that the pattern of ground water level pattern like a dome. This indicates that the peatland of Jabiren ICCTF research demonstration plot that began to be cultivated for rubber plant in 2006 has not experienced subsidence significantly. Result indicates also that temporal fluctuation of ground water level was strongly influenced by pattern fluctuation of water level ofsecondary canal inlet but it was not influenced by secondary canal outlet. The tertiary canals flapegates must be funtioned well in order to maintain the optimal depth of groundwater as water level does not fluctuate. The secondary channel as serves as a transport services must be temporary installed by flapegate at downstream so that the duration of the water level in the channel will last longer and ultimately affect positive on the water level in the cultivated land.
Analisis Sumberdaya Air untuk Irigasi Lahan Sawah dalam meningkatkan Akurasi Kalender Tanam Apriyana, Yayan; Kartiwa, Budi
JURNAL SUMBER DAYA AIR Vol 15, No 1 (2019)
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1307.075 KB) | DOI: 10.32679/jsda.v15i1.404

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Kajian hidrologis yang terintegrasi dengan analisis waktu tanam di daerah irigasi diperlukan untuk mendukung sistem produksi tanaman pangan khususnya padi. Kajian dilakukan melalui (1) Identifikasi Karakteristik distribusi spasial Daerah Irigasi Kewenangan Pusat (2) Analisis distribusi temporal ketersediaan air irigasi pada tingkat Kecamatan berdasarkan sebaran daerah irigasi kewenangan pusat (3) Penentuan waktu tanam terbaik dan menghitung luas panen berdasarkan analisis neraca ketersediaan-kebutuhan air lahan sawah. Hasil penelitian menunjukkan Ketersediaan air di Daerah Irigasi (DI) Way Rarem Lampung dan Daerah Irigasi Colo Jawa Tengah dapat memenuhi pasokan irigasi pada MT I dan MT II bahkan di beberapa wilayah dapat digunakan hingga MT III. Ketersediaan air di DI Way Rarem meningkat pada Oktober minggu pertama (Oktober I) dan mencapai puncaknya pada Januari I selanjutnya mengalami penurunan sampai mencapai ketersediaan air terendah pada Agustus I. Ketersediaan air di DI Colo relatif konstan yang dapat dipenuhi dari pasokan irigasi dan curah hujan, kecuali pada Oktober II -November I karena jadwal rutin perawatan dan perbaikan bangunan dan saluran irigasi. Hasil penetapan waktu tanam tingkat kecamatan pada DI Way Rarem untuk MT I pada Oktober II sampai dengan Februari I, untuk MT II pada Februari II sampai dengan Juni I dan MT III dari Juli I sampai dengan Oktober I. Untuk DI Colo pada MT I pada November minggu ke satu/dua sampai dengan Februari minggu ke tiga/ Maret I, untuk MT II pada Maret minggu ke I/II sampai dengan April I/Juni III dan MT III dari Juli I/II sampai dengan September III