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All Journal Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment) Jurnal Ilmu Lingkungan Journal of Tropical Soils Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Jurnal Penelitian Kelapa Sawit Jurnal Tanah dan Iklim
Enni Dwi Wahjunie
Departemen Ilmu Tanah Dan Sumberdaya Lahan, Fakultas Pertanian, Institut Pertanian Bogor, Jl. Meranti Kampus IPB Dramaga, Bogor 16680
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Environmental Science

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Karakteristik Hidrologi Tanah di Bawah Tegakan Pinus (Pinus merkusii), Merawan (Hopea odorata Roxb) dan Mahoni Uganda (Khaya anthoteca): Soil Hydrological Characteristics Under Pine (Pinus merkusii), Merawan (Hopea odorata Roxb), and African Mahogany (Khaya anthoteca) Stands Andria Harfani Qalbi; Suria Darma Tarigan; Enni Dwi Wahjunie; Dwi Putro Tejo Baskoro
Jurnal Ilmu Tanah dan Lingkungan Vol 20 No 1 (2018): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (321.339 KB) | DOI: 10.29244/jitl.20.1.7-12

Abstract

Forest destruction may affect forest hydrological functions either as a water regulator, maintaining the timing and distribution of river water flows, maintaining microclimate, or being able to protect the underlying areas from disasters such as floods. Revegetation is considered as an effort to improve the condition of forest and environment. The objective of this study was to examine the hydrological characteristics of soil under stands of Pinus (Pinus merkusii), Ugandan Mahogany (Khaya anthoteca), and Merawan (Hopea odorata Roxb). The method used is periodic measurement of soil physical variables. Our investigation reveals that hydrological and physical properties of soil under the stands were different. Within the same depth of soil, water content changed from the highest to the lowest in Pine (3.05%), Merawan Siput Jantan (2.40%), and African Mahogany (1.89%), respectively. The highest infiltration was 116.25 cm hour-1 under Pine stand, while the lowest was 24 cm hour-1 under Merawan Siput Jantan stand. The highest permeability was 13.27 cm hour-1 under Pine stand, while the lowest was 2.72 cm hour-1 under Merawan Siput Jantan stand. Dominated by clay, the soil texture was relatively similar in each stand. Further, the soil under the three stands were categorized as the soil hydrological group B.
Analisis Potensi Ketersediaan dan Kebutuhan Air di Daerah Aliran Sungai Cisangkuy: Analysis of Potential Availability and Water Needs of Cisangkuy Watershed Mariana Lusia Resubun; Ennie Dwi Wahjunie; Suria Darma Tarigan
Jurnal Ilmu Tanah dan Lingkungan Vol 20 No 2 (2018): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (277.911 KB) | DOI: 10.29244/jitl.20.2.57-62

Abstract

Kondisi DAS Cisangkuy mengalami degradasi yang ditunjukkan dengan semakin seringnya kejadian banjir di musim hujan dan kekeringan di musim kemarau. Beberapa kecamatan di Kabupaten Bandung mengalami banjir tahunan. Pada 2013, banjir setinggi dua meter menyebabkan Kabupaten Baleendah terisolasi. Perubahan penggunaan lahan di DAS Cisangkuy merupakan salah satu penyebab menurunnya kondisi hidrologis. Peningkatan populasi di DAS Cisangkuy menyebabkan peningkatan permintaan air. Perubahan penggunaan lahan dan peningkatan populasi dapat mengancam ketersediaan air baku di DAS Cisangkuy. Tujuan dari penelitian ini adalah untuk menganalisis keseimbangan pasokan dan permintaan air DAS Cisangkuy dan untuk menganalisis dampak perubahan penggunaan lahan pada respon hidrologi DAS Cisangkuy. Hasil penelitian menunjukkan bahwa ketersediaan air DAS Cisangkuy dengan debit rata-rata 2015 memiliki jumlah air yang tersedia hingga 343,121,970 m3. Total ketersediaan air hingga 11,104,629,178 m3 pada tahun 2015. Berdasarkan hasil ini, ada defisit air hingga 10,498,001,277 m3 tahun-1.
Parameter Sensitivity Test of SWAT Hydrological Model On Two Different Resolutions (A Case Study of Upper Cisadane Subbasin, West Java) Nurmaranti Alim; Suria Darma Tarigan; Dwi Putro Tejo Baskoro; Enni Dwi Wahjunie
JOURNAL OF TROPICAL SOILS Vol 23, No 1: January 2018
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2018.v23i1.47-53

Abstract

A sensitivity analysis of SWAT parameters was conducted on different spatial resolutions. The sensitivity analysis aimed to determine the input parameters that have the most impact on the of output of the model. Resolution of different inputs in the SWAT analysis can produce different input parameters that can affect the output. The purpose of this study was to identify the level of sensitivity of the parameters used in the SWAT model simulated on two different resolutions, i.e. 1: 100,000 and 1: 250,000. A sensitivity test was conducted manually using the absolute sensitivity method, i.e. a method to test the sensitivity of the parameters of SWAT model that can change (either increase or decrease) one by one while the other parameters are constant. The results show that the Nash-Sutcliffe Efficiency (NSE) coefficients derived after calibration of the SWAT models on both resolutions of maps indicate similar performance of the models, with the category for the daily simulation of excellent (NSE coefficients of 0.55 and 0.54), while the monthly simulation is categorized as very satisfactory (NSE coefficients of 0.80 and 0.82). The sensitive parameters of the SWAT model identified in the current study include CN2 (initial SCS runoff curve number for moisture condition II), Alpha_BNK (flow recession constant or recession proportional to the banks of the river), CH_K2 (effective hydraulic conductivity in main channel alluvium), CH_N2 (Manning’s “n” value for the main channel), ESCO (soil evaporation compensation factor), GW_Delay (groundwater delay), and GW_Revap (groundwater “revap” coefficient).  
Kajian Peran Stakeholder Pada Implementasi Kebijakan Pengelolaan DAS Terpadu, Studi Kasus DAS Krueng Aceh Rikky Mulyawan; Enni Dwi Wahjunie; Iin Ichwandi; Suria Darma Tarigan
Jurnal Ilmu Lingkungan Vol 20, No 2 (2022): April 2022
Publisher : School of Postgraduate Studies, Diponegoro Univer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jil.20.2.198-209

Abstract

Kerusakan daerah aliran sungai (DAS) semakin meningkat, disamping karena faktor perubahan tutupan lahan, faktor pengelolaan DAS juga menjadi pemicu. Peraturan Pemerintah (PP) No.37 Tahun 2012 dan Perda (Qanun) No. 7 tahun 2018 merupakan landasan pengelolaan DAS di Aceh. DAS Krueng Aceh merupakan DAS prioritas yang kondisinya kritis, pengelolaan DAS Krueng Aceh memerlukan penanganan terpadu oleh stakeholders terkait. Kajian ini bertujuan untuk menganalisis PP, Qanun, stakeholders pengelola DAS Krueng Aceh dan implementasi kebijakan berdasarkan perubahan kondisi biofisik DAS. Analisis yang digunakan kajian ini adalah analisis perubahan kondisi biofisik DAS, analisis stakeholders, serta analisis implementasi kebijakan. Berdasarkan hasil analisis kondisi biofisik DAS, tutupan lahan DAS Krueng Aceh dalam 10 tahun terakhir  menunjukkan perubahan yang sangat signifikan pada tahun 2020, perubahan ini berdampak pada kondisi hidrologi DAS dimana terjadi perubahan debit sungai maksimum pada tahun 2020 sebesar 15.78 m³/detik dibandingkan tahun 2019 sebesar 10.09 m³/detik. Dari pendalaman isi PP dan Qanun diketahui hal pokok kegiatan pengelolaan DAS yakni ; peningkatan daya dukung DAS, pengelolaan sumber daya air, dan penataan ruang. Terdapat 20 stakeholders yang terlibat pengelolaan DAS Krueng Aceh, stakeholders pemerintah memiliki kepentingan yang tinggi dan sumber daya untuk melaksanakan kegiatan. Bila dilihat dari kondisi biofisik DAS tahun 2020 dan dikaitkan dengan peraturan perundangan, analisis stakeholders, serta analisis implementasi kebijakan dapat dikatakan bahwa kegiatan pengelolaan DAS secara terpadu belum berjalan sesuai isi kebijakan. Untuk mewujudkan hal tersebut perintah PP dan Qanun harus dilaksanakan secara tegas, Tim Koordinasi Pengelolaan DAS Terpadu (TKPDAS-T) yang sudah dibentuk harus sesegera mungkin difungsikan untuk mewujudkan implementasi kebijakan pengelolaan DAS terpadu.ABSTRACTWatershed damage is increasing, in addition to changes in land cover, watershed management factors are also a trigger. Government Regulation (PP) No.37 of 2012 and Perda (Qanun) No. 7 of 2018 is the cornerstone of watershed management in Aceh. Krueng Aceh watershed is a priority watershed whose condition is critical, the management of Krueng Aceh watershed requires integrated handling by relevant stakeholders. This study aims to analyze PP, Qanun, stakeholders of Krueng Aceh watershed management and policy implementation based on changes in watershed biophysical conditions. The analysis used by this study is an analysis of changes in the biophysical condition of the watershed, stakeholder analysis, and policy implementation analysis. Based on the results of the analysis of the biophysical condition of the watershed, the cover of the Krueng Aceh watershed in the last 10 years showed a very significant change in 2020, this change has an impact on the condition of watershed hydrology where there is a maximum river discharge change in 2020 of 15.78 m³ / second compared to 2019 of 10.09 m³ / second. From the deepening of the contents of PP and Qanun, it is known that the main things of watershed management activities are; increased watershed carrying capacity, water resource management, and spatial arrangement. There are 20 stakeholders involved in the management of the Krueng Aceh watershed, government stakeholders have high interests and resources to carry out activities. When viewed from the biophysical condition of the watershed in 2020 and associated with legislation, stakeholder analysis, and policy implementation analysis, it can be said that integrated watershed management activities have not been run  with the contents of the policy. To realize this, the PP and Qanun orders must be implemented strictly, the Integrated Watershed Management Coordination Team (TKPDAS-T) that has been established must be as soon as possible to realize the implementation of integrated watershed management policies.
Water quality in areas around Galuga Landfill, Bogor Regency, West Java Yayat Hidayat; Wahyu Purwakusuma; Sri Malahayati Yusuf; Latief Mahir Rachman; Enni Dwi Wahjunie; Dwi Putro Tejo Baskoro; Aditia Sapto Utomo; Elianah
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol. 11 No. 4 (2021): Journal of Natural Resources and Environmental Management
Publisher : Graduate School Bogor Agricultural University (SPs IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.11.4.578-586

Abstract

The research is aimed to analyze leachate, surface water and ground water characteristics around Galuga landfill site, Bogor District. Water samples had been taken in dry season of 2014 and in the end of rainy season of 2015 from several sites in areas around Galuga landfills which included leachate water, surface water, and ground water. Leachate, surface water and ground water had temperature and pH in normal ranges; whereas nitrate and Pb contents were high to very high levels, especially in site adjacent to waste piles. The concentrations decreased in line with increasing distance from waste piles. Higher content of nitrate in leachate occurred in dry season, but in well water it was found in rainy season. Meanwhile, Pb content in well water were high, both in dry and rainy seasons. Concentrations of nitrate and Pb in leachate water were higher than wastewater quality standard, so that the leachate water were not safe to be discharged directly to natural water body. The high content of nitrate and Pb caused the well water unsuitable to be consumed without water treatment processing.
Pengaruh Komponen Neraca Air Terhadap Produktivitas Kelapa Sawit pada Berbagai Jenis Tanah:: Studi Kasus Kalimantan Tengah dan Barat Adhy Ardiyanto; Kukuh Murtilaksono; Enni Dwi Wahjunie; Atang Sutandi
Jurnal Penelitian Kelapa Sawit Vol 29 No 1 (2021): Jurnal Peneltian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iopri.jur.jpks.v29i1.125

Abstract

Different types of soil and the geographical areas of oil palm plantations generate variations in soil physical properties (e.g. texture and porosity). Differences in geographical location further result in variations in the amount of rainfall that affects the water balance. The response to diverse fluctuations in palm oil production due to variations in soil types and water balance can be assessed through correlation analysis between water balance parameters and oil palm productivity under varying soil types and regions. In this study, the water balance analysis was carried out at three locations of PT Bumitama Gunajaya Agro's oil palm plantations in Central Kalimantan and West Kalimantan provinces, using the Thornthwaite-Mather method. Analysis of the relationship between water balance components and oil palm fresh fruit bunch (FFB) yields is calculated based on monthly data for 8 years (2012 - 2019) using time series analysis and stepwise regression to find the best regression model. The water balance components that most influence the fresh fruit bunches (FFB) yield (tonnes/ha/month) are rainfall 7 months before harvest, rainy days 11 and 28 months before harvest, and water deficit 10 months before harvest. A decrease in FFB yield (tonnes/ha/month) occurs every time there is an increase in water deficit of 10 mm/month on Dystrudept, Paleudults, and Haplohumods soils in Area 3, respectively 11, 2, and 3%. In Area 5 the decline is 12, 4, and 5%. In Area 6 the decline is 5, 18, and 3%.
Retensi Air Tanah Pada Jenis Tanah dan Penggunaan Lahan di Kabupaten Lamongan AH. Maftuh Hafidh Zuhdi; Enni Dwi Wahjunie; Suria Darma Tarigan
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 46, No 1 (2022): Akan Terbit Resmi pada Juli 2022
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v46n1.2022.13-21

Abstract

Kabupaten Lamongan merupakan daerah yang rawan terjadi kekeringan. Budidaya pertanian lahan kering sangat tergantung pada kemampuan tanah meretensi air, yang secara langsung dipengaruhi oleh jenis tanah dan tipe penggunaan lahan. Penelitian ini bertujuan untuk menetapkan retensi air tanah pada  jenis tanah dan tipe penggunaan lahan di Kabupaten Lamongan. Penelitian dilaksanakan di lahan kering Kabupaten Lamongan pada Grumusol Hutan (GH), Grumusol Tanaman Semusim (GTS), Tanah Mediteran Hutan (MH), dan Tanah Mediteran Tanaman Semusim (MTS). Pengambilan sampel tanah dilaksanakan pada musim kemarau, dengan mengamati sifat tanah antara lain tekstur, bobot isi, ruang pori total, distribusi ukuran pori, kadar air tanah berbagai nilai pF, bahan organik dan dinamika kadar air tanah lapang. Hasil penelitian menunjukkan bahwa setiap jenis tanah dan penggunaan lahan memiliki sifat tanah yang bervariasi. Grumusol memiliki nilai pF 2,52 (kapasitas lapang) yang lebih tinggi dari pada tanah Mediteran. Pada pF 4,20 (titik layu permanen) tanah Mediteran memiliki nilai yang rendah dari pada Grumusol. GH memiliki waktu paling lama mencapai titik layu permanen, selama 7 hari pada 0-20 cm dan 10 hari pada 20-40 cm. MTS memiliki waktu mencapai titik layu permanen paling cepat, yaitu selama 4 hari. Kadar klei tanah, tipe mineral klei, dan kadar bahan organik yang tinggi di Grumusol membuat tanah mampu memegang air lebih lama.
Co-Authors Adhy Ardiyanto Aditia Sapto Utomo AH. Maftuh Hafidh Zuhdi Andria Harfani Qalbi Atang Sutandi Dwi Putro Tejo Baskoro Elianah Iin Ichwandi Kukuh Murtilaksono Latief Mahir Rachman Mariana Lusia Resubun Nurmaranti Alim Rikky Mulyawan Suria Darma Tarigan Wahyu Purwakusuma Yayat Hidayat Yusuf, Sri Malahayati