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All Journal Jurnal Teknik Sipil MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Ilmiah Desain & Konstruksi Jurnal Teknik Pengairan: Journal of Water Resources Engineering Journal of the Civil Engineering Forum Civil Engineering Journal Jurnal Irigasi Civil and Environmental Science Journal (CIVENSE) Jurnal Aplikasi Teknik Sipil Jurnal Rekayasa Sipil Jurnal Teknik Sipil JURNAL SUMBER DAYA AIR Jurnal Teknik Sumber Daya Air Jurnal Sains dan Teknologi Tadulako Jurnal Forum Teknik Sipil Jurnal Lembaga Pengabdian Kepada Masyarakat Undana

Denik Sri Krisnayanti

Civil Engineering Study Program, Nusa Cendana University

Author-ID : 300204

Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Materials Science & Nanotechnology Social Sciences Transportation

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Curve Number Estimation for Ungauged Watershed in Semi-Arid Region Krisnayanti, Denik Sri; Bunganaen, Wilhelmus; Frans, John H.; Seran, Yustinus A.; Legono, Djoko
Civil Engineering Journal Vol 7, No 6 (2021): June
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/cej-2021-03091711

The Benanain Watershed is located in East Nusa Tenggara with an area of 3,181 km2 and is divided into 29 sub-watersheds. The East Nusa Tenggara itself is an eastern region of Indonesia with a unique climate condition called semi-arid. The high rainfall intensity occurring in short duration results in large surface runoff and erosion. Floods and erosion in semi-arid areas due to sensitive soils to drought and heavy rainfall extremely. This paper presents the application of the Soil Conservation Services-Curve Number (SCS-CN) real-flood flows through a digital map of soil type, land use, topography, and the heterogeneity of physical condition, especially for ungauged watersheds. The method used is an approach empirical to estimate runoff from the relationship between rainfall, land use, and soil hydrology groups. This watershed has a large area that must analyze every sub-watershed. The land-use of the Benanain watershed is secondary dryland forest by 44.26% and the hydrological soil group on the B group classification with medium to high absorption potential by 46.502% from the total area. The curve number value of the Benanain Watershed ranges from 56.54 to 73.90, where the mean CN value of 65.32. The rainfall (mm) for the 29 sub-watersheds in the Benanain Watershed has decreased by about 74.65% when being surface runoff or only 25.35% of water becomes surface runoff. The relationship between rainfall depth and CN is classified as standard response and trend line (flat slope) equilibrium occurs when rainfall depth value of 56.71 mm and CN is close to 66.30. The high variability of intense rainfall between the rainy season and the dry season had a significant influence on the curve number value in a large watershed area. Further analysis will be more accurate if it is supported by long rainfall data and observation runoff data as a control.Â Doi: 10.28991/cej-2021-03091711 Full Text: PDF

Analysis of Runoff Coefficient Value on Retention Ponds in Flores Island Krisnayanti, Denik Sri; Bunganaen, Wilhelmus; E. Hangge, Elsy; Munaisyah, Farah; A. Nursyam, Nurul; Khaerudin, Dian Noorvy
Civil and Environmental Science Journal (CIVENSE) Vol 2, No 1 (2019)
Publisher : Fakultas Teknik UB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.civense.2019.00102

Flores Island is one of four big islands in NTT province with an area Â±13,540 km divided into 8 districts. The area is included in areas with unequal distribution of rainfall. Therefore, the amount of water availability during the dry season is relatively low then require to attempts of rainwater harvesting. One of the alternatives is by building a retention pond. The important parameter in the calculation of water availability is the value of runoff coefficient. The purpose of this research is to invent the runoff coefficient value of 30 retention ponds in 8 districts of Flores Island. In this study use rainfall data, climatology and technical of retention basin for the analysis of run off coefficient. The analysis method uses the Penman modification for evapotranspiration calculation and method F.J. Mock for discharge calculation. The result in graphical model uses monthly rainfall data and land slope data. Based on the analytical calculation method, the value of run off coefficient for each district in Flores was ranging 0.00 - 0.72. The minimum value of runoff coefficient happened in November was ranging from 0.00 - 0.39, and the maximum value of runoff coefficient happened in January was ranging from 0.48 - 0.72.

ANALISIS NILAI KOEFISIEN LIMPASAN PERMUKAAN PADA EMBUNG KECIL UNTUK PERTANIAN DI PULAU FLORES BAGIAN TIMUR Denik Sri Krisnayanti
JURNAL SUMBER DAYA AIR Vol 14, No 2 (2018)
Publisher : Bina Teknik Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Pulau Flores bagian timur yakni di daerah Kabupaten Flores Timur, Sikka, Ende, dan Nagekeo merupakan kawasan yang masuk dalam kategori semi-arid. Daerah tersebut memiliki curah hujan rata-rata bulanan yang hanya berkisar antara 57,17 188,08 mm/bulan, sementara evapotranspirasi rata-rata bulanan yang terjadi lebih tinggi, yakni berkisar antara 164,91 185,57 mm/bulan. Oleh karena itu, jumlah ketersediaan air pada musim kemarau cukup rendah, sehingga perlu dilakukan upaya pemanenan air hujan dengan memperbesar kapasitas tampungan permukaan. Salah satu alternatif yang tepat ialah dengan membangun embung. Parameter penting dalam perhitungan ketersediaan jumlah air pada embung ialah nilai koefisien limpasan. Tujuan dari penelitian ini ialah untuk mendapatkan nilai koefisien limpasan permukaan pada 15 buah embung di Pulau Flores bagian timur dengan menggunakanan data curah hujan dan data klimatologi terbaru.Berdasarkan hasil perhitungan dengan menggunakan metode analisis matematis diperoleh nilai koefisien limpasan permukaan pada embung kecil di Pulau Flores bagian timur berkisar antara 0,00 - 0,72. Untuk nilai koefisien limpasan permukaan terendah terjadi pada bulan November yang hanya berkisar antara 0,00 0,39 dan nilai koefisien limpasan tertinggi terjadi pada bulan Januari yakni berkisar antara 0,48 0,72.

Evaluasi Kesesuaian Data Tropical Rainfall Measuring Mission (TRMM) dengan Data Pos Hujan Pada Das Temef di Kabupaten Timor Tengah Selatan Denik Sri Krisnayanti; Davianto Frangky B. Welkis; Fery Moun Hepy; Djoko Legono
JURNAL SUMBER DAYA AIR Vol 16, No 1 (2020)
Publisher : Bina Teknik Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jsda.v16i1.646

The construction of the Temef Dam in Oenino Village, Oenino District, and Konbaki Village, Polen District, South Central Timor Regency requires long and reliable rainfall data. To overcome the minimum data or the unavailability of automatic rainfall (ARR) and discharge data in the past decades, the use of Tropical Rainfall Measuring Mission (TRMM) satellite data is foreseen. The accuracy of TRMM data is obtained when the parameters of suitability and compatibility of TRMM are in a good agreement with the ARR. For the Temef watershed, there are six rainfall stations that were reviewed, namely Fatumnasi, Oeoh, Noelnoni, Polen, Nifukani, and Batinifukoko rainfall stations. Direct comparisons of rainfall data were conducted for 20 years (1998-2018) with temporal resolution on a monthly and daily basis. The results of the study show that the rainfall patterns in the TRMM data product (version 3B42V7) tend to be consistent with 3 rainfall stations in the Temef watershed namely Noelnoni, Fatumnasi, and Batinifukoko. A correlation coefficient of 0.505 – 0.813 was obtained from TRMM data calibration at monthly basis while a correction factor level of 0.0056 - 0.0129 was obtained for daily. The calibration on the annual maximum daily rainfall data resulted in a correction factor of 0.0298 - 0.2516. Monthly and daily TRMM data fit well with the data of 3 rainfall stations. However, the Noelnoni rainfall station showed poor results on the annual maximum daily rainfall.Keywords: TRMM data, ARR data, correction factor, correlation coefficient

Kajian Sistem Drainase Kota Labuan Bajo di Nusa Tenggara Timur Tatas Tatas; Denik Sri Krisnayanti; Mahendra Andiek Maulana
Jurnal Aplikasi Teknik Sipil Vol 10, No 1 (2012)
Publisher : Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember Surabaya

Kota Labuan Bajo terletak di Kecamatan Komodo, Kabupaten Manggarai Barat, Provinsi Nusa Tenggara Timur. Kabupaten Manggarai Barat merupakan hasil pemekaran dari Kabupaten Manggarai berdasarkan Undang Undang No. 8 Tahun 2003. Wilayahnya meliputi daratan Pulau Flores bagian Barat dan beberapa pulau kecil di sekitarnya, diantaranya adalah Pulau Komodo dan Pulau Rinca yang merupakan habitat binatang langka, komodo. Sebagai transit menuju habitat komodo, maka Kota Labuan Bajo mengalami pembangunan yang pesat. Pembangunan tersebut harus diimbangi pula oleh sistem drainase yang memadai. Dalam makalah ini akan disampaikan permasalahan genangan yang terjadi, pola aliran air limpasan, dan usulan zona penanganan drainase. Adapun metodologi yang digunakan adalah dengan melakukan survei secara langsung ke lokasi, dengan melihat topografi, sungai utama. Selain itu dengan menggunakan beberapa program komputer yang mampu membaca topografi dan melakukan deliniasi batas daerah aliran sungai secara otomatis menggunakan Gridded Surface Subsuface Hydrology Analysis (GSSHA).Berdasarkan analisis maka dapat diambil kesimpulan bahwa genangan akibat topografi yang berbukit-bukit dan tidak didukung oleh saluran drainase yang memadai, pola aliran limpasan air yaitu langsung menuju ke laut dan ada yang ditampung terlebih dahulu oleh sungai-sungai utama, sistem penanganan drainase dapat dibagi empat zona berdasarkan daerah tangkapan hujan yaitu DAS Waebo, DAS Waemata, DAS Waekemiri, DAS Waemese.

Application of A Tank Model to Assess the Performance of Rotiklot Reservoir Initial Filling Denik Sri Krisnayanti; Andi H. Rizal; Wilhelmus Bunganaen; Costandji Nait; Anang Galang Anargi Djalil Mangu
Journal of the Civil Engineering Forum Vol. 6 No. 2 (May 2020)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Rotiklot dam is located in Belu Regency that has the tropic climate, with very short wet season (4-5 months) and a very long dry season (7-8 months). The average monthly rainfall in December – April of approximately 300 – 500 mm/month, while in another month only ranges 30- 60 mm/month. During the rainy season, rainwater will overflow as surface water and collect in the river as a flood toward the sea. The construction of a dam is one alternative to overcome the water needs of the community during the dry season. The Rotiklot dam retains the flow of water in the Motamuru River and its reservoir can accommodate 2.9 million m3. Impounding is a process carried out once a dam has been constructed. It is a comprehensive process involving filling time and water inflow. The purpose of this study was to determine the first filling time and the inflow volume in Rotiklot Reservoir in the years of dry, low, normal and sufficient water using the Tank method. It aimed to simulate the initial filling of the reservoir. Also, the study is expected to evaluate the most suitable Tank model, with parameters calibrated using the Genetic Algorithm optimization approach. The determination coefficient using a four series tank is 0.531 greater than the coefficient obtained from 3 series tank simulation, which was 0.506. The total inflow volume in Rotiklot Reservoir for dry, low, normal and sufficient were 1.946, 7.289, 9.699, 13.822 million m3 respectively. Based on the calculation result of the inflow volume of the year of the low water, the filling time is around three months, starting from mid-December to mid-March.

Rainfall-Runoff Simulation Using HEC-HMS Model in the Benanain Watershed, Timor Island Wilhelmus Bunganaen; John H. Frans; Yustinus Akito Seran; Djoko Legono; Denik Sri Krisnayanti
Journal of the Civil Engineering Forum Vol. 7 No. 3 (September 2021)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.64782

Floods in a watershed area are caused by reduced water recharge due to changes in land use, increasing their discharge volume. Benanain watershed is an extensive area with many tributaries. Watershed morphometrics provides initial information about the hydrological behavior and the hydrograph shape of flooding in these areas. Furthermore, rainfall-runoff modeling uses as a unit to approach the hydrological values of the flooding process. This study determines the physical characteristics of the Benanain watershed based on curve number (CN) values, land cover, peak discharge, and peak time. It was conducted on the Benanain watershed with 29 sub-watersheds covering 3,181.521 km2. Data were collected on the rainfall experienced for 13 years from 1996 to 2008 and analyzed using the Log Pearson Type III method, while the HEC HMS model was used for flood discharge analysis. HEC-HMS model must calibrate by adjusting the model parameter values until the model results match historical data such as initial abstraction, lag time, recession, baseflow values, and curve number. The results show that the curve number values range from 56.55 - 73.90, comprising secondary dryland forest and shrubs. Moreover, the rock lithology in the Benanain watershed is dominated by scaly clay and other rock blocks. This means the area has low to very low permeability, which affects the volume of runoff. The return period of a 1000-year flood discharge obtained a peak of 5,794.50 m3/s, with a peak time of ± 14 hours. Morphometry of the Temef watershed with large catchment, radial shape pattern, an average of steep slope river, and meandering affects the peak of flood discharge hydrograph and the peak time of the flood.

Penerapan Saluran Pencampur Pada Sistem Irigasi Tambak Dian Noorvy Khaerudin; Denik Sri Krisnayanti
Jurnal Irigasi Vol 9, No 1 (2014): Jurnal Irigasi
Publisher : Balai Teknik Irigasi

Indonesia as an agricultural country has a plan in food endurance. Food endurance is also a goal of the MDG 's 2015 Millennium Development Goals were made at Indonesian food resilience into national strategic issues . Indonesia has potential for abundant natural resources , including water resources and fisheries . The types of fish is a source of protein for the body and it plays an important role in improving the nutritional well-being in terms of public health . Brackish water fishery developed are milk fish and shrimp . Sidoarjo district has a regional commodity and smoked milkfish. So most people in Sidoarjo district has these fisheries . But more and more reduced because in addition to its water quality is not maintained as well as irrigation systems are still not organized . The irrigation system is important because with this system of distribution of water activities , prepare pattern of planting , fertilization fish , enlargement , to marketing can work well . Mixer Channel brackish water is a mixture of fresh water and sea water with the required water quality. The problem tertiary channels that directly relate to the primary channel , and can not provide the required water quality ponds . The purpose of making the mixer channel are application the mixer channel for water quality of salinity that available for fish pond and addressing water quality problems that affect the productivity of the farm , and run the irrigation system , water distribution , so organized and structured . And mixer channel with sluice gate will be effective as to split water bearer channel to channel tertiary pond .

Perencanaan Embung Wae Lerong untuk Pemenuhan Kebutuhan Air Irigasi di Daerah Irigasi Wae Lerong Ruteng Provinsi NTT Denik Sri Krisnayanti; Elsy E. Hangge; Tri M.W. Sir; Eugenius Nino Mbauth; Alvine C. Damayanti
Jurnal Irigasi Vol 15, No 1 (2020): Jurnal Irigasi
Publisher : Balai Teknik Irigasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31028/ji.v15.i1.15-30

Wae Lerong Small dam is located in Ruteng City, Manggarai District which has a catchment area of 0,606 km2 and the annual rainfall ranges from 2,500-3,000 mm/year. But in some locations still having water shortages, so it needs rainwater harvesting to get increase agricultural potential during the dry season. This study aims to design the Wae Lerong Small dam as a rainwater reservoir during the rainy season and used in utilization to fulfill the needs of irrigation water. The method used is a quantitative method with empirical data analysis. The rainfall analysis used the Log Pearson III method and flood discharge analysis using the rational method. Evapotranspiration calculations using the Penman Modification method and the dependable discharge analysis using the F.J. Mock method. The analysis of slope stability using the Limit Equilibrium Method aided by the GeoStudio Slope / W 2007 Program. The results showed that the average monthly rainfall ranged from 28.87 - 511.99 mm/month. The rainfall for 50-year return period of 249.28 mm, and flood discharge for 50-year return period of 12.094 m3/s. The design of Wae Lerong dam is height of 13.5 m, a width of 5 m, length of 81.50 m, the upstream slope of 1:3, and downstream slope 1:2.25. For the stability of the reservoir body safety value > 1.10 so it is still in a safe condition. Wae Lerong Small dam storage capacity is 86,540.96 m3 with an inundation surface area of 19,855.69 m2 at a normal water level of 1,204.00 m. The value of dependable flow is 0.001 - 0.793 m3 /s and the water requirements for planting pattern I (Paddy-Paddy-Palawija) increase up to 0.176 m3/s. The water balance values deficit in May - September which ranged from 0.017 to 0.13 m3/s.

Bendung Bertangga sebagai Alternatif pada Perencanaan Bangunan Irigasi Denik Sri Krisnayanti; Very Dermawan; M. Solichin; Suhardjono Suhardjono; Dian Noorvy Khaerudin
Jurnal Irigasi Vol 11, No 2 (2016): Jurnal Irigasi
Publisher : Balai Teknik Irigasi

Stepped weir is generally a modification on the downstream face of a standard ogee weir. The overflow on stepped weir classified in to three types: nappe flow, transition flow, and skimming flow. The skimming flow more used in planning the weir because almost all the operations of weir for large discharge. This study aimed to investigate and examine the advantages of stepped weir by conducting variations models such as slope angle of weir, number of steps, and the value of Froude number. In this research, the models test of stepped spillway carried out with two models of weir type were the ogee weir and the stepped weir. The slope of stepped spillway (θ) are used 30˚ and 45˚, the number of steps (N) are 40 and 20, and the critical depth to the height of steps (yc/h) ranging from 0,700 <yc/h<3.00 with the Froude number (Fr)< 10. The results showed that friction factor of Darcy-Weisbach (f) for the stepped weir is 0.311 which affect the value of energy loss. Levels of dissolved oxygen at stepped weir flow increased by 2.011% - 2.846%. The value of relative energy losses (ΔE1/E0) are 86.129% on the stepped weir and 72.466% on the ogee weir. The increase in value relative energy loss will affect the length of stilling basin in the downstream.

Co-Authors A. Nursyam, Nurul Alvine C. Damayanti Alvine C. Damayanti Alvine C. Damayanti Alvine Cinta Damayanti Ananda, Yokti Anang Galang Anargi Djalil Mangu Andi H. Rizal Andi Kumalawati Chrystin Chandra Chrystin Chandra Costandji Nait Dantje A. T. Sina Davianto F. Welkis Davianto Frangky B. Welkis Davianto Frangky B. Welkis Decaprio, Alex Demonsa Bintang Putra Lende Djoko Legono Djoko Legono Dolly W. Karels Elia Hunggurami Eugenius Nino Mbauth Fery Moun Hepy Forisman R. Nomnafa Galla, Andrea Z. Hamdan Nurdin Hangge, Elsy E. Henry Jefrison Benu I Made Udiana I Made Udiana I Made Udiana Jacob Kedoh John H. Frans John Hendrik Frans Jordy Georgia Makunimau Judi K Nasjono Judi K. Nasjono Jusuf J. S. Pah Khaerudin, Dian Noorvy Klau, Ralno R. Klau, Ralno Robson Lomi, Desinta Banni M. Solichin Maulana, Mahendra Andiek Megonondo, Batara Doa Mirnawati S Pasoa Munaisyah, Farah Nichorids S Saudale Pah, Jusuf J.S Partogi H. Simatupang, Partogi H. Pasoa, Mirnawati S Philipi de Rozari Remigildus Cornelis Rohi D. Radja Pono Rosmiyati A Bella Ruslan Ramang Ruslan Ramang SATRIYAS ILYAS Seran, Yustinus A. Sereh, David Peterson Sri Wahyuni Suhardjono Suhardjono Syamsumarlin, . Taopan, Angelio A Tatas, Tatas Tri M. W. Sir Tri M.W. Sir Tri M.W. Sir Very Dermawan Vilkanova C. Garu Wilhelmus Bunganaen Wilhelmus Bunganaen Wilhelmus Bunganaen Wilhelmus Bunganaen Wilhelmus Bunganaen Wilhelmus Bunganaen Wilis, Kezia Georginia Patricia Willem Sidharno Yerison Dimu Ratu Yunita A. Messah Yustinus Akito Seran

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