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All Journal JURNAL AIR INDONESIA JURNAL TEKNOLOGI LINGKUNGAN Jurnal Sains & Teknologi Modifikasi Cuaca Jurnal Teknologi Lingkungan

Sutopo Purwo Nugroho

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Author-ID : 333493

Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Education Engineering Environmental Science

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PERGESERAN KEBIJAKAN DAN PARADIGMA BARU DALAM PENGELOLAAN DAERAH ALIRAN SUNGAI DI INDONESIA Nugroho, Sutopo Purwo
Jurnal Teknologi Lingkungan Vol. 4 No. 3 (2003): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Integrated watershed management, which aims at restoration of a soundhydrologic regime in the watershed considering water resources utilization,appropriate landuse, water quality control and environmental conservation, is becoming crucially important in Indonesia. Because, the land degradation of watershed in Indonesia more increases every time. There is a growing concern that many parts of the Indonesia watershed will continue to face problems of watershed degradation. The basic problem in most watershed area, especially in Java, is too many people being concentrated on too small land base. Besides that, the causes of watershed degradation are complex and interrelated, such as too much emphasis being placed on economic growth in the management of natural resources, and the continuing presence of poverty, population growth, infrastructural and industrial development. Thus, the exisiting environmental problems and their overall impacts are not only biophysical in nature, but also social.The integrated watershed approach stresses the interaction of all activities that take place throughout the watershed. The strategy of watershed management approach uses new paradigm with people of participation and using community development in operational, practices and bottom up approach.

PENERAPAN SIG UNTUK PENYUSUNAN DAN ANALISIS LAHAN KRITIS PADA SATUAN WILAYAH PENGELOLAAN DAS AGAM KUANTAN, PROVINSI SUMATERA BARAT Nugroho, Sutopo Purwo
Jurnal Teknologi Lingkungan Vol. 9 No. 2 (2008): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

The increment of critical land extent is still undergoing because of change of land use without accompanied with conservation of land and water proportionally. Hence, it is need to carry out rehabilitation of land and forest by considering critical land map which is purposed to define priority scale, both its spatial and time. By applying technology of Geographic Information System (GIS), it can be mapped critical land according to standard of critical land criteria. In addition, the constraint of manual map can be reduced, particularly in information processing and map reproduction. In Agam Kuantan Watershed, critical land of forest has extent of 778.704,2 ha, and outside there area is about 496.486,7 ha.

MINIMALISASI LAHAN KRITIS MELALUI PENGELOLAAN SUMBERDAYA LAHAN DAN KONSERVASI TANAH DAN AIR SECARA TERPADU Nugroho, Sutopo Purwo
Jurnal Teknologi Lingkungan Vol. 1 No. 1 (2000): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Akibat adanya pemanfaatan sumberdaya alam yang melebihi daya dukung lingkungan dan tidak dibarengi dengan usaha konservasi tanah dan air, ternyata telah menimbulkan munculnya ketidakseimbangan lingkungan yaitu terus bertambahnya luas lahan kritis. Peningkatan luas lahan kritis ini juga semakin dipercepat dengan meningkatnya tekanan penduduk terhadap lahan, khususnya di Pulau Jawa. Akibatnya pemanfaatan lahan dieksploitasi secara terus menerus sehingga menyebabkan produktivitas lahan menjadi berkurang dan lahan miskinhara. Hal ini akan berakibat pada menurunnya produksi pertanian, semakinbesarnya erosi, sedimentasi, banjir, kekeringan, pendangkalan sungai,berkurangnya umur waduk dan masalah-masalah lingkungan lainnya. Luas lahan kritis pada awal tahun 1974, jumlah lahan kritis secara nasional mencapai 10.751.000 ha, kemudian pada tahun 1998 dengan kriteria penetapan lahan kritis yang lebih objektif, lahan kritis di Indonesia mencapai 23.725.552 ha. Sedangkan luas lahan agak kritis sebesar 3.311.152 ha dan lahan potensial kritis seluas 8.806.758 ha, sehingga luas keseluruhan sebesar 35.852.462 ha atau 18,6% dari luas lahan di Indonesia. Meskipun usaha rehabilitasi lahan dan konservasi tanah dan air sudahdilakukan melalui program penghijauan dan reboisasi serta usaha lainnya, namun usaha-usaha tersebut masih belum mampu mengatasi terjadinya peningkatan luas lahan kritis. Hal ini lebih disebabkan pendekatan yang dilakukan lebih berorientasi pada penanganan fisik dan kurang memperhatikan masalah sosial ekonomi dan budaya masyarakat. Untuk itulah maka untuk mencegah peningkatan laju lahan kritis tersebut perlu dilakukan secara komprehensif, terpadu dan multisektoral. dengan melibatkan peran serta masyarakat secara menyeluruh.

PENGARUH UKURAN SEL TERHADAP HASIL PREDIKSI MODEL AGNPS DALAM EVALUASI PENGENDALIAN KUALITAS PERAIRAN DARI SUMBER PENCEMAR PERTANIAN Nugroho, Sutopo Purwo
Jurnal Teknologi Lingkungan Vol. 1 No. 3 (2000): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Water quality monitoring effort increased with concern about protection ofthe water quality from waterbody. AGNPS model, which was developed toobjectively evaluate alternative land management strategies on non point source pollution from agricultural watersheds, offers a method of predicting the quality of water from the watershed. The model has the ability to output water quality characteristics at intermediate points throughout the watershed network. The size cell was very influence the result of output model. More large of the size cell so the sediment and nutrient yield output was large too. Scale of map for indentify the input model was influnce the result of output model.

ANALISIS SENSITIVITAS PARAMETER HIDROLOGI, SEDIMENTASI DAN HARA DENGAN MENGGUNAKAN MODEL AGNPS UNTUK PENGELOLAAN LINGKUNGAN Nugroho, Sutopo Purwo
Jurnal Teknologi Lingkungan Vol. 1 No. 2 (2000): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

In Indonesia, the serious problems of degradation water quality from nonpoint source pollution was not yet many applied on watershed. Agricultural activities such as cultivation and application of fertilizer and pesticide will influence water quality, with activities in runoff-producing zones and near streams having a greater effect than those elsewhere. Water quality integrates all sources of pollutants. Nonpoint sources, by definition, are diffuse and not easily identified or quantified. The control technologies and best management practice available are generally expensive to beimplemented. AGNPS model is a model hydrology that should used to identify and quantify the nonpoint source pollution from watershed. The AGNPS is an event-based model that simulates surface runoff, sediment, and nutrient transport primarily from agricultural watersheds. In addition, the model considers point sources of water, sediment, nutrients, and chemical oxigen demand (COD) from animal feedlots, and spring. The model has the ability to output water quality characteristics at intermediate points throughout the watershed network. Seven parameters were selected out of twenty two parameters based on their significance in sensitivity to hydrology, erosion and sediment, and nutrient yield output. That seven parameters consist of SCS curve number, Manning’s roughness coefficient, cover and management factor, land slope, channel sideslope, practice factor and fertilization availability factor. Omitted parameters in the hypothetical scenario formulation were either parameters of uncontrollable nature such as rainfall, EI30, soil erodibility, or parameters that had least significant sensitivity such as field slope length and channel slope. The simulation with BMP system has been conducted from the parameter adjustment for seven parameters. The BMP scenario was mosteffective in reducing the degree of volume and peak runoff rate by 32,08% and 29,66% from the base value of 0,53 inches and 118,51 cfs. All erosion and sediment related nonpoint source pollutants were significantly reduced by 66,36% from the base value of 135,67 tons by altering the cover and management factor (C-factor) and the practice factor (P-factor). At the time that, total N dan total P were significantly reduced by 56,85% and 57,92% from the base value of 11,15 lbs/acre and 7,01 lbs/acre with that same of methods.

PENGARUH KONSEP SISTEM DAN LINGKUNGAN DALAM MODIFIKASI CUACA TERHADAP PENINGKATAN CURAH HUJAN DAN KETERSEDIAAN AIR DI DAS CITARUM Nugroho, Sutopo Purwo
Jurnal Teknologi Lingkungan Vol. 2 No. 2 (2001): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Weather modification technology was applied in Citarum Watershed – West Java on 12 March – 10 April 2001 for increase water resources in Saguling, Cirata and Jatiluhur Dams. The application was based indication of Citarum River inflow decreased at the end of 2001 that so three cascade dams had water storage deficits. Weather modification technology by employing system and environment concept has been increase the rainfall and inflow of Citarum Watershed. The average inflow of Citarum River was 326,81 m3/sec and nett volume storage in the dams were 559,06 million m3.

EVALUASI PEMBANGUNAN WILAYAH PENGEMBANGAN SELATAN DKI JAKARTA SEBAGAI KAWASAN RESAPAN AIR Nugroho, Sutopo Purwo
Jurnal Teknologi Lingkungan Vol. 3 No. 1 (2002): JURNAL TEKNIK LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Southern Development Region DKI Jakarta is set as a water recharge area in the mean of decreasing the problem of water resources in DKI Jakarta. The fact, however, this rule does not run well, because there is not action plan and along with followed by development control and law enforcement. what that rule. Besides, the decree on Southern Develeopment Region as water recharging area is not optimal in either in groundwater stream point of view.That so, development in Southern Development Region must directed accomplishment with open space standard, park and playing field for city region, beginning of playlot, playground, playfield, and urban park. There is not only for old settlement, but new settlement development is necessary to put spatial arrangement in order.

ANALISIS HIDROGRAF SATUAN SINTETIK METODE SNYDER, CLARK DAN SCS DENGAN MENGGUNAKAN MODEL HEC-1 DI DAS CILIWUNG HULU Nugroho, Sutopo Purwo
Jurnal Sains & Teknologi Modifikasi Cuaca Vol 2, No 1 (2001): June 2001
Publisher : BPPT

Analisis hidrograf satuan sintetik berdasarkan metode Snyder, Clark, dan SCS pada suatu DAS dapat dilakukan dengan menggunakan model HEC-1. Model HEC-1 merupakan paket model hidrologi yang cukup terkenal yang dapat digunakan untuk mensimulasi aliran permukaan sebagai respon hujan tunggal yang terjadi pada suatu DAS. Metode SCS mempunyai Qp, Tp dan tebal DRO yang lebih besar daripada pengamatan. Sedangkan metode Snyder dan Clark, nilai Qp lebih kecil dibandingkan dengan Qp pengamatan, namun waktu puncaknya lebih besar.Synthetic unit hydrographs analysis of a watershed based on Snyder, Clark, and SCS methods can be done by utilizing HEC-1 model. The HEC-1 model is a package of hydrological model that has been adequate known to simulate runoff as a response of a rainfall event on a watershed. SCS method predicts Qp, Tp and DRO depth higher than the observations. Meanwhile, Snyder and Clark methods predict smaller Qp, but higher time of peak.

VALIDASI PREDIKSI RATA-RATA CURAH HUJAN HASIL REGIONAL SPECTRAL MODEL (STUDI KASUS DI JAWA BARAT, BULAN DESEMBER 1998) Kudsy, Mahally; Nugroho, Sutopo Purwo
Jurnal Sains & Teknologi Modifikasi Cuaca Vol 2, No 1 (2001): June 2001
Publisher : BPPT

Validasi Model Spektral Regional dilakukan dengan membandingkan hasil prakiraandengan data aktual. Model dijalankan untuk membuat simulasi curah hujan untuk periode dari 9 sampai 15 Desember 1998. Data curah hujan diperoleh dari 55 lokasi penakar hujan yang tersebar di daerah Jawa Barat. Nilai curah hujan menurut model di lokasi penakar hujan diperoleh dari interpolasi isohyet yang menggambarkan curah hujan menurut luaran model. Studi ini menunjukkan bahwa nilai curah hujan lokai tidak dapat diprediksi dengan mudah dengan menggunakan RSM. Curah hujan rata-rata wilayah berdasarkan luaran RSM mempunyai penyimpangan ?2 sampai 150% terhadap nilai pengamatan. Dari studi ini ditemukan bahwa ketelitian prakiraan semakin baik bila waktu prakiraan lebih panjang. Prakiraan yang terbaik diperoleh bila waktu prakiraan adalah 7 hari ke depan dengan penyimpangan ?2.1%Validation of Regional Spectral Model was carried out by comparing the results of rainfall prediction with actual data. The model was run to simulate rainfall for one week period of December 9 to 15, 1998. The rainfall data from the sama period was obtained from 55 raingauge stations in West Jawa. The predicted values of preciptation in the gauge location obtained by interpolation from isohyet were then compared to the actual values. This study showed that local precipitation can not be predicted easily using RSM. The predicted values of the average local precipitation deviated from the Ukurerved value by about -2 to 150%. It is found that the accuracy of the prediction is better for longer prediction time. The best prediction was obtained for 7 day-lead with deviation of -2.1% from the observed value.

EVALUASI PENINGKATAN HASIL CURAH HUJAN DAN KETERSEDIAAN AIR AKIBAT KEGIATAN MODIFIKASI CUACA DI DAS CITARUM Nugroho, Sutopo Purwo; Tikno, Sunu
Jurnal Sains & Teknologi Modifikasi Cuaca Vol 3, No 1 (2002): June 2002
Publisher : BPPT

Defisitnya air di ketiga waduk di DAS Citarum menyebabkan teknologi modifikasi cuacasegera diterapkan untuk meningkatkan ketersediaan air. Penerapan teknologi modifikasicuaca telah menyebabkan meningkatnya curah hujan dan aliran di DAS Citarum. Hasil yang dicapai selama kegiatan adalah rata-rata aliran Sungai Citarum sebesar 326,81 m/detik dan volume air yang tertampung di ketiga waduk sebesar 559,06 juta m3. Adanya tambahan air tersebut maka untuk kebutuhan air pada musim tanam gadu 2001 di daerah irigasi Jatiluhur cukup tersedia, bahkan masih terdapat cadangan air sebesar 1.440,26 juta m3. Namun demikian jika dibandingkan dengan pola rencana untuk kebutuhan air musim tanam rendeng 2001/2002 dan musim tanam gadu 2002 masih terdapat kekurangan air sebesar 152,7 juta m3.Weather modification technology was applied in Citarum for fullfil water in Citarum cascade dam (Saguling, Cirata dan Juanda) due to decreasing water storage. Weather modification technology has been increase the rainfall and inflow of Citarum Watershed. The average inflow of Citarum River was 326,81 m3/sec and nett volume storage in the dams were 559,06 million m3 . Increassing water can be used to irrigation water supply in Pantura agriculture area during dry seasson. However, water irrigation requirement in wet and dry seasson 2001/2002 stil deficit 152.7 million m3.

Co-Authors A.A. Ketut Agung Cahyawan W Baginda Patar Sitorus Baginda Patar Sitorus, Baginda Patar Findy Renggono Findy Renggono, Findy Florentinus Heru Widodo Florentinus Heru Widodo, Florentinus Heru Jon Arifian Jon Arifian, Jon Mahally Kudsy Mahally Kudsy, Mahally Mimin Karmini R Djoko Goenawan R Djoko Goenawan, R Djoko Rino Bahtiar Yahya Rino Bahtiar Yahya, Rino Bahtiar Samsul Bahri Satyo Nuryanto Satyo Nuryanto, Satyo Sunu Tikno Sunu Tikno, Sunu Veithzal Rivai Zainal

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