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Jurnal Penelitian Pengelolaan Daerah Aliran Sungai
ISSN : 25795511     EISSN : 25796097     DOI : -
Core Subject : Agriculture,
Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (JPPDAS) ) is an official publication that publishes scientific papers of research results in the field of watershed management. This Journal was published primarily by Watershe Management Technology Center on April 2017. Journal scopes include are land and vegetation management, soil and water conservation, land rehabilitation, hydrology, social, economic, institutional, remote sensing and Geographic Information Systems (GIS) that support watershed management technologies.
Arjuna Subject : -
Articles 60 Documents
EFEKTIVITAS MULTIMEDIA DALAM BIOFILTER PADA PENGOLAHAN AIR LIMBAH RUMAH TANGGA (The effectiveness of multimedia in biofilters on grey water treatments) Hidayat, Muhamad Yusup; Fauzi, Ridwan; Suoth, Alfrida
Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Management Research) Vol 3, No 2 (2019): Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Managem
Publisher : Center for Implementation of Standards for Environmental and Forestry Instruments Solo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (577.699 KB) | DOI: 10.20886/jppdas.2019.3.2.111-126

Abstract

ABSTRACTPopulation growth in major cities in Indonesia has implications to the increase of clean water consumption. The highest demand of clean water is in fulfilling household needs. The use of clean water for household needs does not follow the efficiency principle. So that in fulfilling the water needs, it is necessary to use other sources, one of which is grey water. This study aims to determine the effectiveness of multimedia contacts by adding wood shavings as biofilter material in treating grey water. The applied method in this research is quantitative with a qualitative descriptive approach, by conducting experiments using wood shavings as a material for biofilter. This research was carried out in the residential of Villa Bintang Mas, South Tangerang City in October 2018. The results showed that the usage of biofilter materials with the addition of wood shavings was effective in removing the pollutant of the grey water. It is indicated by the level of biofilter efficiency in reducing pollutant concentrations ranging from 40.6% (BOD parameters) to 100% (Coliform parameters). Nevertheless, Coliform parameters still do not meet the standard quality, therefore, there is a need for additional disinfectants to reduce Coliform levels.Keywords: grey water; biofilter; wood shavings; multimedia ABSTRAKPertumbuhan penduduk pada kota-kota besar di Indonesia berimplikasi pada peningkatan konsumsi air bersih. Konsumsi air bersih terbesar salah satunya dalam pemenuhan kebutuhan domestik rumah tangga. Penggunaan air bersih untuk kebutuhan domestik saat ini masih belum mengikuti kaidah efisiensi dalam penggunaannya. Oleh karena itu, dalam pemenuhan kebutuhan air tersebut perlu dilakukan pemanfaatan sumber lainnya, salah satunya adalah air sisa limbah domestik rumah tangga (grey water). Penelitian ini bertujuan untuk mengetahui efektivitas kontak multimedia dengan penambahan serutan kayu sebagai media biofilter dalam mengolah air limbah domestik rumah tangga (grey water). Penelitian ini dilakukan melalui percobaan penggunaan multimedia dengan penambahan serutan kayu sebagai media kontak biofilter. Penelitian ini dilaksanakan di perumahan Villa Bintang Mas, Kota Tangerang Selatan pada bulan Oktober 2018. Hasil penelitian menunjukkan bahwa penggunaan multimedia biofilter dengan penambahan serutan kayu efektif dalam penyisihan pencemar pada air limbah domestik rumah tangga. Hal tersebut ditunjukkan dengan tingkat efisiensi alat dalam menurunkan konsentrasi pencemar berkisar antara 40,6% (parameter BOD) sampai dengan 100% (parameter Coliform). Meskipun demikian, parameter Coliform masih belum memenuhi standar baku mutu, sehingga perlu penambahan disinfektan untuk menurunkan kadar Coliform.Kata kunci: limbah domestik; biofilter; serutan kayu; multimedia
BANJIR BANDANG DI ALASMALANG BANYUWANGI DAN ALTERNATIF PENANGANANNYA (Flash flood at Alasmalang Banyuwangi and alternatives for its completion) Hidayat, Rokhmat; Iswardoyo, Jati
Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Management Research) Vol 3, No 2 (2019): Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Managem
Publisher : Center for Implementation of Standards for Environmental and Forestry Instruments Solo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (942.901 KB) | DOI: 10.20886/jppdas.2019.3.2.127-140

Abstract

ABSTRACTFlash floods frequently occur in Indonesia. Flash flood can be caused by natural and human factors. This paper discusses the causes and mitigation of flash flood using a case study in Banyuwangi. On June 22th 2018, flash floods occurred in the residential areas of Garit, Karang Asem, and Bangunrejo Hamlets. Flash floods were triggered by heavy rainfall the day before, which reached 90 mm/day. The three hamlets are located in Alasmalang Village, Singojuruh Subdistrict, Banyuwangi District. The study began with a field survey, analysis of the damage, and the causes of a flash flood, and its alternative treatments. The suspected source of the material was the landslide material, approximately two million cubic meters from the Pendil Mountain. Some of the material were carried away by the river flooding caused flash floods in the three hamlets. The small width of the bridge was not able to be passed by trees and other flash flood material, so water overflowed the roads and houses. Based on the results of the study, it is recommended for disaster mitigation in the form of structural and non-structural actions. Structural measure in the form of bridge elevation and construction of sediment retaining weirs, while non-structural actions are in the form of an early warning system and dissemination of flash flood hazards.Keywords: Flash flood; landslide; structural treatments; non-structural treatments ABSTRAKBanjir bandang sering terjadi di Indonesia. Banjir bandang dapat disebabkan oleh faktor alami maupun manusia. Makalah ini membahas tentang penyebab dan mitigasi banjir bandang dengan studi kasus di Banyuwangi. Pada 22 Juni 2018 banjir bandang melanda kawasan permukiman di Dusun Garit, Karang Asem, dan Bangunrejo. Banjir bandang dipicu hujan lebat sehari sebelumnya mencapai 90 mm/ hari. Tiga dusun itu berada di Desa Alasmalang, Kecamatan Singojuruh, Banyuwangi. Penelitian diawali dengan survei lapangan, analisis kondisi kerusakan akibat banjir bandang, penyebab banjir bandang, serta alternatif penanganannya. Sumber material diduga berupa material longsor sekitar dua juta meter kubik dari Gunung Pendil. Sebagian material ini terbawa banjir sungai sehingga menyebabkan banjir bandang di tiga dusun tersebut. Kondisi lebar jembatan yang kecil tidak mampu dilalui oleh pepohonan dan material banjir lain, sehingga banjir meluap menggenangi jalan dan rumah warga. Berdasarkan hasil kajian maka direkomendasikan untuk penanggulangan dan mitigasi bencana berupa tindakan struktural dan tindakan non struktural. Tindakan struktural berupa peninggian jembatan dan pembangunan bending penahan sedimen, sedangkan tindakan nonstruktural berupa sistem peringatan dini dan sosialisasi bahaya banjir bandang.Kata kunci: Banjir Bandang; longsor; penanganan struktural; penanganan non-struktural
PENGARUH LUAS PENGGUNAAN LAHAN TERHADAP LAJU EROSI : STUDI PADA BEBERAPA DAS DI WILAYAH TAPAL KUDA JAWA TIMUR (The effect of land use on erosion rate: a study at several watersheds in Tapal Kuda Region, East Java) Taslim, Rhoshandhayani Koesiyanto; Mandala, Marga; Indarto, Indarto
Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Management Research) Vol 3, No 2 (2019): Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Managem
Publisher : Center for Implementation of Standards for Environmental and Forestry Instruments Solo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (542.262 KB) | DOI: 10.20886/jppdas.2019.3.2.141-158

Abstract

ABSTRACTThe regencies of Probolinggo, Lumajang, Jember, Bondowoso, Situbondo, and Banyuwangi are located in the Eastern part of East Java and called as Tapal Kuda. These regions are actually on fast development. The development to service human settlement generates land use change from natural into urban or developed areas. The change in land use will generate more runoff, erosion, and sedimentation from the watersheds. This study examined the effect of land use types and their percentage areas on erosion rates. The Universal Soil Loss Equation (USLE) was used to predict the erosion rate. The erosion rate of four land uses, which were forests, paddy fields, plantations and settlements, were calculated and compared. The values of the erosion rate were obtained by the statistical value per pixel in the watershed. Fifteen watersheds in the Tapal Kuda area were used as the samples. The results showed that the relationship (r2) between forests, rice fields, plantations, settlements and the erosion rate: 0.2; 0.2; 0.2 and 0.03, respectively.Keywords: area percentage; land use; erosion rate; watershed; USLE ABSTRAKProbolinggo, Lumajang, Jember, Bondowoso, Situbondo dan Banyuwangi merupakan kabupaten yang terletak di bagian timur Provinsi Jawa Timur dan dikenal dengan sebutan wilayah Tapal Kuda. Wilayah ini sedang mengalami perkembangan pembangunan yang cukup pesat. Percepatan pembangunan ini dilakukan untuk memenuhi kebutuhan manusia berupa pemukiman, akses jalan dan kebutuhan lainnya. Hal ini mengakibatkan terjadinya alih fungsi lahan yang memberikan dampak turunan berupa limpasan, erosi dan sedimentasi di DAS (Daerah Aliran Sungai). Penelitian ini mengkaji pengaruh luas penggunaan lahan terhadap laju erosi. Model Universal Soil Loss Equation (USLE) digunakan untuk memprediksi laju erosi. Analisis dilakukan dengan membandingkan persentase luas penggunaan lahan hutan, sawah, perkebunan dan pemukiman terhadap nilai laju erosi. Nilai laju erosi diperoleh berdasarkan statistik nilai per piksel di dalam DAS. Sejumlah 15 DAS di wilayah Tapal Kuda digunakan sebagai sampel. Hasil penelitian menunjukkan adanya korelasi (r2) antara luas hutan, sawah, perkebunan dan pemukiman terhadap laju erosi masing-masing sebesar 0,2; 0,2; 0,2 dan 0,03, secara berurutan.Kata kunci: persentase luas; penggunaan lahan; laju erosi; DAS; USLE
ANALISIS NERACA AIR PERTANIAN DI SUB DAS RAWATAMTU (Analysis of agricultural water balance in Rawatamtu sub-watershed) Setiawan, Erwan Bagus; Indarto, Indarto; Wahyuningsih, Sri
Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Management Research) Vol 3, No 2 (2019): Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Managem
Publisher : Center for Implementation of Standards for Environmental and Forestry Instruments Solo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (974.904 KB) | DOI: 10.20886/jppdas.2019.3.2.175-194

Abstract

ABSTRACTPopulation growth, urbanization, industrial development, and agricultural activities increase water demand on the watershed. An increase in water demand will propagate the excessive exploitation of surface water and groundwater resources. This will probably influence the water balance of the watershed. Therefore, understanding the water balance is a necessity. Continuous imbalance between water supply and demand will generate many serious environmental problems. A study of agricultural water balance is needed to answer the question whether the available water resources can meet the needs of sufficient water for irrigation. The study was conducted in Rawatamtu sub-watershed which was part of Bedadung Watershed. The Water Evaluation and Planning (WEAP) model was used to analyze agricultural water balance. The procedure included inventory data, installing WEAP on the system, running the WEAP, and using WEAP for simulating future water balance conditions. The simulation results showed that agricultural water balance for the next 10 years will be more frequently in surplus condition rather than in deficit condition. The water surplus was estimated to occur in the year of 2020, 2021, 2023, 2025, 2027 and 2028. The highest surplus occurred in the year of 2028 which reached 56.59 million m3. Furthermore, the potential water balance deficit was projected to occur in 2019, 2022, 2024, and 2026.Keywords: agricultural water balance; WEAP; agricultural water needs; Rawatamtu ABSTRAKPeningkatan kebutuhan air dipicu oleh peningkatan pertumbuhan penduduk, urbanisasi, pembangunan industri, dan peningkatan kegiatan pertanian. Kebutuhan air yang meningkat ini akan menyebabkan eksploitasi yang berlebihan terhadap sumberdaya air tanah dan air permukaan. Hal ini memungkinkan akan mempengaruhi neraca air DAS. Oleh karena itu diperlukan pemahaman terhadap keseimbangan air. Ketidakseimbangan antara jumlah ketersediaan air dan kebutuhan yang berkepanjangan akan menimbulkan dampak terhadap masalah lingkungan yang serius. Kajian tentang neraca air pertanian diperlukan untuk menjawab pertanyaan apakah sumber daya air yang tersedia dapat memenuhi kebutuhan air yang cukup untuk irigasi. Studi ini dilakukan di Sub DAS Rawatamtu yang merupakan bagian dari DAS Bedadung. Model Water Evaluation and Planning (WEAP) digunakan untuk menganalisis neraca air. Prosedur ini mencakup inventarisasi data, instalasi WEAP pada sistem, menjalankan WEAP, dan pelaksanaan simulasi WEAP untuk proyeksi kondisi neraca air masa depan. Hasil simulasi menunjukkan bahwa neraca air pertanian selama 10 tahun ke depan di Sub DAS Rawatamtu akan lebih sering berada dalam kondisi surplus daripada dalam kondisi defisit. Surplus air diperkirakan terjadi pada tahun 2020, 2021, 2023, 2025, 2027, dan 2028. Surplus tertinggi terjadi pata tahun 2028 yang mencapai 56,59 juta m3. Lebih lanjut, potensi defisit neraca air diproyeksikan akan terjadi pada tahun 2019, 2022, 2024, dan 2026.Kata kunci: neraca air pertanian; WEAP; kebutuhan air pertanian; Rawatamtu
ANALISIS MODAL SOSIAL DALAM PENGELOLAAN MATA AIR DI DUSUN NGARAM-ARAM, DESA CREWEK, KECAMATAN KRADENAN, KABUPATEN GROBOGAN (Analysis of social capital in springs management at Ngaram-aram Hamlet, Crewek Village, Kradenan District, Grobogan Regency) Hastanti, Baharinawati Wilhan; Purwanto, Purwanto
Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Management Research) Vol 3, No 2 (2019): Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Managem
Publisher : Center for Implementation of Standards for Environmental and Forestry Instruments Solo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (457.898 KB) | DOI: 10.20886/jppdas.2019.3.2.89-110

Abstract

ABSTRACTSGrobogan Regency is one of the areas in Central Java that experiences drought almost every year. However, Ngaram-aram Hamlet in Crewek Village in the Grobogan Regency almost has not affected by drought in the dry season due to some springs located in this area. Increasing the community participation in water management could be obtained by strengthening the social capital. The objective of this study is to determine the social capital variables in the management of springs by identifying: 1) trust and community solidarity in spring’s management, 2) social Norms in spring’s management, and 3) social networks in spring’s management. The results of the research show that spring’s management was carried out both physically and spiritually. Trust and solidarity in spring’s management could be seen in regulating and distributing water to houses, and in contributing to the finance of spring’s management. The existing social norm is in the form of command sand prohibitions in spring’s management that contain social values, rewards and punishments. The social network in spring’s management at Ngaram-aram appears in a special set of relationships among groups of people who utilize the springs with characteristics of relationships that could be used to interpret social behavior motives from the people involved in them. This network has economic function to obtain water for household and agricultural purposes, social function in security and socialization, and communication flow of information. Indicators of the social network existence could be seen from 1) individual centrality 2) individual closeness, and 3) togetherness between individuals.Keywords: social capital; springs; management ABSTRAKKabupaten Grobogan adalah salah satu wilayah di Jawa Tengah yang hampir setiap tahun mengalami kekeringan. Namun demikian, Dusun Ngaram-aram di Desa Crewek yang termasuk dalam wilayah Kabupaten Grobogan hampir tidak terdampak kekeringan di musim kemarau karena adanya mata air yang bersumber di kawasan tersebut. Peningkatan partisipasi masyarakat dalam pengelolaan air dapat diperoleh melalui penguatan modal sosial. Penelitian ini bertujuan mengetahui variabel-variabel modal sosial dalam pengelolaan mata air dengan mengidentifikasi: 1) kepercayaan dan solidaritas masyarakat dalam pengelolaan mata air, 2) norma sosial dalam pengelolaan mata air, dan 3) jaringan sosial dalam pengelolaan mata air. Hasil penelitian menunjukkan pengelolaan mata air dilakukan secara fisik dan spiritual. Bentuk-bentuk kepercayaan dan solidaritas dalam pengelolaan mata air berupa kepercayaan dan solidaritas dalam mengatur distribusi air ke rumah-rumah, urunan dalam pembiayaan yang terkait dengan pengelolaan mata air. Norma sosial yang ada berupa perintah dan larangan dalam pengelolaan mata air yang mengandung nilai-nilai sosial, penghargaan, dan hukuman. Jaringan sosial dalam pengelolaan mata air di Ngaramaram tampak pada seperangkat hubungan khusus di antara sekelompok warga yang memanfaatkan mata air, dengan karakteristik hubungan yang dapat digunakan untuk menginterpretasikan motif perilaku sosial dari orang-orang yang terlibat di dalamnya. Jaringan tersebut berfungsi ekonomi dalam memperoleh air untuk kebutuhan rumah tangga dan pertanian, jaminan sosial dan sosialisasi, dan komunikasi. Indikator-indikator keberadaan jaringan sosial dilihat dari 1) sentralitas individu, 2) kedekatan individu, dan 3) kebersamaan antar individu.Kata kunci: modal sosial; pengelolaan; mata air
KESEDIAAN MEMBAYAR MITIGASI LONGSOR DI KARANGANYAR DENGAN PENDEKATAN CONTINGENT VALUATION METHOD (Willingness to pay landslide mitigation in Karanganyar with the contingent valuation method approach) Rusnaryati, Endah; Rahardjo, Mugi; Suryanto, Suryanto
Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Management Research) Vol 3, No 2 (2019): Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Managem
Publisher : Center for Implementation of Standards for Environmental and Forestry Instruments Solo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (494.802 KB) | DOI: 10.20886/jppdas.2019.3.2.159-174

Abstract

 ABSTRACTLandslides are still a threat in some areas in Karanganyar Regency which has mountainous topography. Landslides cause in loss of property, and lives. Community participation in landslide mitigation is very important because the community is dealing directly with landslides. One of the roles of the community in landslide mitigation can be measured by the willingness to pay (WTP). The aims of this study are 1) to determine factors that influence WTP for reducing the impact of landslides, 2) to determine the value of WTP for landslides mitigation. The method used in this study is contingent valuation methods by calculating the amount of WTP to reduce the risk of landslides and the factors that affect WTP. This study used primary and secondary data. Primary data were obtained using open interview techniques with 100 respondents in some villages in Karanganyar District, who are at risk of landslides, while secondary data was taken from the Statistics Agency (BPS) and Regional Agency for Disaster Countermeasure (BPBD) of Karanganyar Regency. The results showed that incomes and poverty affected the WTP for landslide mitigation significantly. The average willingness to pay for landslide mitigation in the form of construction of cliff walls, closure of cracks and reparation of waterways in Karanganyar Regency is Rp. 26.307,00 per month.Keywords: landslide mitigation; contingent valuation; willingness to pay ABSTRAKKejadian longsor masih menjadi ancaman pada sebagian wilayah di Kabupaten Karanganyar yang topografinya bergunung. Bencana longsor mengakibatkan kerugian berupa harta, benda, dan korban jiwa. Peran serta masyarakat dalam mitigasi longsor sangat penting karena masyarakat yang berhadapan langsung dengan longsor. Peran masyarakat dalam mitigasi longsor salah satunya dapat diukur dengan kesediaan membayar mitigasi longsor (WTP). Penelitian ini bertujuan untuk 1) mengetahui faktor-faktor yang mempengaruhi kesediaan masyarakat untuk membayar (WTP) guna mengurangi dampak longsor, 2) mengetahui besarnya WTP dalam mitigasi bencana longsor. Metode yang digunakan adalah contigent valuation methods untuk menghitung besarnya willingness to pay (WTP) mitigasi risiko longsor. Penelitian ini menggunakan data primer dan sekunder. Data primer diperoleh dengan menggunakan teknik wawancara terbuka pada 100 responden di desa-desa berisiko longsor. Sedangkan data sekunder diambil dari BPS dan BPBD Kabupaten Karanganyar. Hasil penelitian menunjukkan bahwa variabel pendapatan dan kemiskinan berpengaruh signifikan terhadap kesediaan untuk membayar (WTP) mitigasi longsor. Masyarakat di lokasi kajian bersedia untuk membayar (WTP) rata-rata sebesar Rp. 26.307,00 per bulan per KK untuk mitigasi longsor berupa pembangunan tembok penahan tebing, penutupan retakan tanah dan perbaikan saluran air di Kabupaten Karanganyar.Kata kunci: mitigasi longsor; contingent valuation; willingness to pay
PENDUGAAN INFILTRASI MENGGUNAKAN DATA NERACA AIR DI SUB DAERAH ALIRAN SUNGAI WATUJALI, GOMBONG (Estimation of infiltration based on water balance method at Watujali Sub Watershed, Gombong) Pramono, Irfan Budi; Adi, Rahardyan Nugroho
Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Management Research) Vol 1, No 1 (2017): Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Managem
Publisher : Center for Implementation of Standards for Environmental and Forestry Instruments Solo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (836.732 KB) | DOI: 10.20886/jppdas.2017.1.1.35-48

Abstract

Infiltration rate in a watershed is very important for water management. There are many methods for estimating the rate of infiltration in a watershed. Among of them are direct measurements, hydrograph analysis and water balance calculation. The purpose of this study was to estimate infiltration in the sub watershed  under pine forest. The method was based on a relationship between water balance and regression of monthly rainfall and discharge. The results showed that the infiltration rate of pine forest in Watujali Sub Watershed  range from 125 mm/year up to 1,193 mm/year. The infiltration rate was highly depended on rainfall as the input. In  2010 with 5,826 mm rainfall, the infiltration rate reached 1,193 mm/year. Estimation of infiltration using water balance data was easy to implement because it only used data of streamflow, rainfall and evapotranspiration.
PERBANDINGAN PREDIKSI HASIL SEDIMEN MENGGUNAKAN PENDEKATAN MODEL UNIVERSAL SOIL LOSS EQUATION DENGAN PENGUKURAN LANGSUNG (Comparison of sediment yield from prediction using Universal Soil Loss Equation with direct measurement) Auliyani, Diah; Wijaya, Wahyu Wisnu
Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Management Research) Vol 1, No 1 (2017): Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Managem
Publisher : Center for Implementation of Standards for Environmental and Forestry Instruments Solo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (965.015 KB) | DOI: 10.20886/jppdas.2017.1.1.61-71

Abstract

Low level of sedimentation is a success indicator of watershed management. Measurement of sedimentation can be conducted directly or through erosion prediction approach. This research aimed to compare sediment yield from prediction by USLE erosion approach using three types formulations of rainfall erosivity with direct measurement. The field data were collected during 2015 in Lowereng Sub Watershed, Sempor District of Kebumen Regency. The slope steepness was derived from ASTER Global Digital Elevation Model and land cover was obtained from World View 2012. Three methods for estimating rainfall erosivity were Utomo and Mahmud, Bols, and Lenvain equations. The USLE applied for every land unit. By considering Sediment Delivery Ratio (SDR), the predicted soil erosion from USLE was converted into sediment yield. The direct measurement of sediment yield was conducted by taking suspended sediment in the outlet of sub watershed. This research indicates that the predicted sediment yield calculated using USLE approach was higher than the direct measurement. The predicted sediment yield using Lenvain’s equation was 3.49 ton/ha (196%), which was the closest to the direct measurement (1.18 ton/ha).
PENGARUH PERLAKUAN MULSA BATANG JAGUNG DAN STRIP PENGUAT TERAS TERHADAP LIMPASAN PERMUKAAN, EROSI DAN HASIL USAHA TANI (Application effect of corn stem mulch and strengthened terrace strips toward runoff, erosion and farm yield) Suyana, Jaka; Muliawati, Endang Setia; Lestariningsih, Nanik Puji
Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Management Research) Vol 1, No 2 (2017): Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Managem
Publisher : Center for Implementation of Standards for Environmental and Forestry Instruments Solo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (846.384 KB) | DOI: 10.20886/jppdas.2017.1.2.127-141

Abstract

A Soil and Water Conservation (SWC) technology is site-specific to the conditions of local farmers. Field trials treatment of crop residue mulch and strengthened terrace strips has been done on dryland farming in Upper Solo and Keduang Sub Watersheds. The results showed: 1) corn + cassava + traditional terrace in Upper Solo Sub Watershed with treatments of: a) 8 ton/ha corn stems mulch and Setaria Grass strip (0-5 months) to strengthen terraces could decrease run off (16.3%) and erosion (31.2%), b) 8 ton/ha corn stems mulch combined with Jali strip decreased run off (11.3%) and erosion (26.9%), and c) 8 ton/ha corn stems mulch combined with Akar Wangi strip decreased run off (10.2%) and erosion (25.9%); and 2) cabbage, red lentils/red bean, and white lentils in Keduang Sub Watershed with treatments of: a) mulching of 12 ton/ha corn stems combined with Kolojono Grass strip (0-4 months) to strengthen terraces decreased run off (4.5%) and erosion (15.5%), b) mulching 8 ton/ha corn stems combined with Akar Wangi strip decreased run off (4.0%) and erosion (14.4%), and c) mulching 4 ton/ha corn stems combined with Jali strip decreased run off  (2.4%) and erosion (13.3%). Giving of 12 ton/ha corn stems mulch could increase yield of cabbage (31.2%), red bean (40.3%), and white lentils (14.5%).
DINAMIKA PENCAPAIAN KONSENSUS DALAM FORUM KOORDINASI PENGELOLAAN DAERAH ALIRAN SUNGAI: SUATU PEMODELAN BERBASIS AGEN (The dynamic of reaching consensus in the coordination forum of watershed management: an agent-based modeling) Irawan, Evi
Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Management Research) Vol 2, No 1 (2018): Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Managem
Publisher : Center for Implementation of Standards for Environmental and Forestry Instruments Solo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1195.884 KB) | DOI: 10.20886/jppdas.2018.2.1.45-60

Abstract

ABSTRACTParadigm change of watershed management towards participative management brings consequences in the involvement of stakeholders in the decision-making process. While on one hand it can increase the social legitimacy of various watershed management policies and activities, the involvement of many stakeholders on the other hand may delay the achievement of consensus and reconciliation of interests. This study aims to examine the influence of social networks built among members of the Central Java Watershed Management Coordination Forum (Forum DAS) on the achievement of consensus with regards to a watershed planning. The research method used agent-based modeling simulation combined with in-depth interview data of forum members. The simulation model was developed using Netlogo 6.02 software. The simulation results show that the structure of the established communications network at this time has not been able to facilitate in the achievement of consensus, but tends to create formation of opinion polarization.Keywords: watershed forum; consensus; social network; agent-based simulation; netlogo ABSTRAKPerubahan paradigma pengelolaan Daerah Aliran Sungai (DAS) ke arah pengelolaan partisipatif membawa konsekuensi berupa pelibatan para pihak yang berkepentingan (stakeholders) dalam proses pengambilan keputusan. Meskipun pada satu sisi hal tersebut dapat meningkatkan legitimasi sosial atas berbagai kebijakan dan kegiatan pengelolaan DAS, keterlibatan sejumlah stakeholders pada sisi lain dapat memperbesar peluang pelambatan pencapaian konsensus dan rekonsiliasi kepentingan. Penelitian ini bertujuan untuk melihat pengaruh struktur jejaring sosial yang terbangun di antara para anggota Forum Koordinasi Pengelolaan DAS (Forum DAS) Provinsi Jawa Tengah terhadap pencapaian konsensus. Metode penelitian yang digunakan adalah simulasi permodelan berbasis agen dengan menggunakan data hasil wawancara mendalam dengan para anggota forum. Model simulasi dibangun dengan menggunakan perangkat lunak Netlogo 6.02. Hasil simulasi menunjukkan bahwa struktur jejaring komunikasi yang terbangun pada saat ini belum dapat mendorong dalam pencapaian konsensus, tetapi cenderung membangun terbentuknya polarisasi pendapat.Kata kunci: forum DAS; konsensus; jejaring sosial; simulasi berbasis agen; netlogo