Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management)
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Carbon Sequestration in the Green Open Spaces along Primary Road of Pontianak City, West Kalimantan, Indonesia`
Get PDFGlobal climate change caused by greenhouse gas (GHG) emissions is currently a focus for various countries worldwide, including Indonesia. Carbon dioxide (CO2) is the main source of emissions, with a significant portion originating in urban areas. This is due to the high levels of air pollution from motor vehicles and rapid industrial growth. Urban green spaces are areas within cities that consist of non-built-up spaces filled with naturally grown or cultivated vegetation. These green spaces exist directly alongside the transportation infrastructure, which helps reduce air pollution, especially CO2, through the vegetation that makes up these areas. One type of urban green space is a green corridor, which forms elongated paths or areas. This study assessed the carbon sequestration of 17 primary road networks in Pontianak City using three allometric models. Plot positions for data collection were determined using purposive sampling, with each side accounting for 5% of the total zigzag plots. This research focused on vegetation at different growth stages, such as saplings, poles, and trees. The results were estimated at 256.86 tons ha-1 (Hardiansyah and Ridwan formula), 269.96 tons ha-1 (Chave formula), and 193 tons ha-1 (Brown formula)
Comparisons of Growth, Yield, and Meteorological Properties of Rice Canopy under Double-Row (Jajar Legowo and Jejer Manten) and Tile Transplanting Systems
Get PDFOver the past decade, the Indonesian government has been recommending double-row transplanting systems, i.e., Jajar Legowo (JL) and Jejer Manten (JM), to increase rice production. These systems have been reported to obtain higher yield of Indica rice cultivars than the standard tile (TL) system, primarily due to the border effect. However, scientific investigations of the border effect in these transplanting systems remain limited. This study was conducted during the summer seasons in Japan in 2022 and 2023 to observe the plant growth and yield of a Japonica rice cultivar, Nikomaru, and to investigate differences in meteorological properties, such as intercepted solar radiation (SRint). The study found that higher plant competition for light in JM and JL caused a lower tiller number and above-ground biomass (Wt) per hill than in TL. However, due to denser planting, JM and JL obtained higher tiller numbers, Wt, and sink capacity per unit area than TL. Additionally, the denser canopy in JM and JL compared to TL increased SRint by the whole canopy, even though the space between the double rows was wider. Although SRint was not significantly different amongthe systems, higher normalized difference vegetation index in JM and JL was strongly correlated with a higher sink filling rate due to the healthier canopy absorbing more solar radiation. The synergistic effect of higher sink capacity and sink filling rate led to higher yields in JM and JL than in TL. This study suggests that JM is the best transplanting system for increasing rice yield. 
Estimating the Water Balance of Irrigated Rice Fields in Dry Season Makurdi, Nigeria
Get PDFThe water balance (WB) of three irrigated and isolated rice fields (1, 2, and 3) was examined during the dry season of rice cultivation in Makurdi from April 5 to May 6, 2023. Rice is mostly cultivated in the wet season, while dry season rice cultivation is limited by high irrigation costs, funding, and technical knowledge amidst vast water resources around the floodplains. Limited or no research estimates the water balance of a rice field in dry season Makurdi. WB took account of water inputs, outputs, and changes in soil water content (ΔW) in each water balance period. In Field 1, the WB showed a negative ΔW (–42.94 mm), which suggests that adequate water inputs are required to balance the water lost (outputs). The WB showed a positive ΔW of (89.36 mm and 464.75 mm) in Fields 2 and 3, suggesting that the water inputs be minimized to avoid wastage. The total irrigation in Fields 1, 2, and 3 was 499.28 mm, 1,186.95 mm, and 1,400.27 mm, respectively. The irrigation efficiency in Fields 1, 2, and 3 was 39.8%, 29.9%, and 20.9% respectively. The result indicates that Field 1’s rice cultivation can be improved by providing adequate irrigation and enhancing the soil water retention capacity, while proper irrigation scheduling can improve Fields 2 and 3 rice productivity
Analysis of The Potential and Carrying Capacity of Lusi Sidoarjo Island as An Education and Conservation-Based Ecotourism
No full textEkosistem mangrove Pulau Lusi Sidoarjo memiliki keunikan dan keindahan yang berpotensi besar untuk dikembangkan sebagai ekowisata berbasis edukasi dan konservasi. Langkah utama yang dapat dilakukan dalam upaya pengembangan ekowisata mangrove adalah identifikasi kondisi dan potensi kawasan melalui analisis daya dukung. Penelitian ini bertujuan untuk menganalisis potensi dan daya dukung ekosistem mangrove di Pulau Lusi sebagai ekowisata berbasis edukasi dan konservasi yang dilaksanakan ada pada Bulan Juni-Juli 2022. Metode yang digunakan dalam penelitian ini adalah kuantitatif deskriptif dengan pengumpulan data melalui observasi dan survey lapangan. Penentuan daya dukung kawsan dilakukan dengan perhitungan daya dukung kawasan. Hasil penelitian menunjukkan bahwa nilai daya dukung kawasan sebesar 360 pengunjung/hari dengan potensi flora dan fauna yang sangat beragam serta kandungan logam dan mineral yang sangat melimpah. Berdasarkan hasil analisis dapat diinterpretasikan bahwa Pulau Lusi Sidoarjo memiliki otensi yang besar untuk dikembangkan sebagai ekowisata berbasis edukasi dan konservasi.The mangrove ecosystem of Lusi Sidoarjo Island has uniqueness and beauty with great potential to be developed as an education and conservation-based tourism. The main step that can be taken in efforts to develop mangrove tourism is identifying regional conditions and potentials through carrying capacity analysis. Carrying capacity analysis is needed to anticipate excess visitors who can potentially cause damage to the tourism environment. This study carried out in June – July 2022, aimed to analyze the potential and carrying capacity of mangrove ecosystems on Lusi Island as an education and conservation-based tourism. The method used in this study is descriptive quantitative by collecting data through observation, interviews, and field surveys. The calculation was made to determine the carrying capacity of the area. The results showed that the area\u27s carrying capacity was 360 visitors/day with a diverse potential for mangroves, flora, fauna, and abundant content of metals and minerals based on XRD and XRF analysis, and literature studies. Based on the results of the analysis, it can be interpreted that Lusi Sidoarjo Island has a great amount of potential to be developed as an education and conservation-based tourism
Flood Hazard Mitigation at Tarusan Watershed, South Pesisir District, West Sumatera Province
Get PDFFloods are the most common natural disasters in Indonesia and have enormous potential. This study aims to determine the flood hazard zone and regional arrangement in the Tarusan Watershed, South Pesisir Regency. To determine the flood hazard zone using the GIS approach. The indicators used to determine flood hazard are slope, rainfall, soil type, landform, geology, and land use. Determine the direction of regional arrangement with an Interpretative Structural Modeling (ISM) approach. The results showed that the high flood hazard zone in the Tarusan watershed is about 22% of the total area, the medium index is around 58%, and the low flood hazard index is 20%. The high - hazard zone of flood disasters in the study area is caused by high rainfall and topographic conditions of the Tarusan Watershed. The main priority in the management of flood - hazard areas in the Tarusan Watershed is to find economic alternatives to reduce forest destruction. Increasing the economic value of the community can lead to reduced community activities in carrying out land conversion, especially in forest areas
Economic Valuation on the Development Plan of the Flower Garden Area using Contingent Valuation Method
Get PDFNon-market value plays a crucial role in the economic valuation of natural resources and the environment. Therefore, this study aimed to estimate the non-market value derived from the development plan of a flower garden area in the Blora Regency. This valuation included individual and aggregate willingness to pay (WTP) and the factors influencing WTP. This study used the Contingent Valuation Method (CVM) as the research approach, with logistic regression as technical analysis. A total of 250 questionnaires were completed by residents of Blora, resulting in a mean value of individual non-market WTP of IDR 10,605 as an entry fee and an aggregate value of IDR 97,567,748/year. The results show that the higher the bid, the lower the probability of paying. Another interesting outcome was that people with an income of over five million and living close tothe garden development plan area had a greater probability of paying than others. These findings provide an overview of the Blora government’s efforts to improve access to areas and facilities within gardens to attract people outside of the characteristics that significantly affect WTP. 
The Utilization Contestation of Indonesian Inland Waters (Case: Lebak Lebung dan Sungai (L3S) Auction in Ogan Komering Ilir District, South Sumatera)
Get PDFSome of the Lebak Lebung and river public water areas in South Sumatra are governed by an auction system that has been carried out for a long time by the local community based on clans, namely "Lelang Lebak Lebung dan Sungai" (L3S). After 1982, the authorities implemented an auction system that transferred the implementation of the auction system to the management regime of the district government to apply regional autonomy. This transition provided governance changes, especially for the increasingly complex actors involved and competing in the L3S battle arena. This article aimed to analyze actor battles in the L3S arena by analyzing specifics about the regime transition change before and after the management of L3S applied, the institutionalization of patronage that was formed, and the social conflicts that occurred. This study used a constructivist paradigm and qualitative research methods. We identified 39 informants as research subjects who were chosen deliberately and analyzed the data using three stages: data reduction, presentation, and conclusion. The study results show that changes in L3S management are dominated by changes in rules and authority holders, which encourage access domination by entrepreneurs/non-fishermen. New working relations are formed by placing local fishermen as laborers and new non-fishermen actors as buyers. As a result, conflicts have occurred between actors
Assessing Urban Flooding and Drainage System Performance in Urban Area: A Mononobe Equation and Manning Formula Approach
Get PDFClimate change causes erratic rainfall and often results in flooding of urban areas. Floods are hydrometeorological disasters that occur in various regions of Indonesia. Flood vulnerability in urban areas has increased over the past 30 years. Kauman Village is included in the Asri water catchment area, which has an Asri primary channel downstream of the urban area of Nganjuk District. However, from 2019 to 2022, the urban area of Nganjuk District, including Kauman Village, was affected by flooding. Urban floods inundated office areas, schools, housing, and public facilities such as the Nganjuk District General Hospital. The factor indicated as the cause of flooding is the clogging of the drainage channel with rubbish. Therefore, field research and mathematical calculations were conducted to evaluate the discharge capacity of drainage channels in the village. Based on the research, it was found that the existing drainage channel discharge in the research area could not accommodate the planned discharge for the 10-year return period. In addition, there are 33 channels that are unable to accommodate the planned discharge because the channeldimensions are too small, some channels are slightly damaged, sedimentation occurs, and they are blocked by rubbish. Drainage channels that do not function optimally affect urban flooding. Therefore, several efforts have been made to reduce the risk of flooding by changing the dimensions of drainage channels, normalizing drainage channels, and getting used to maintain drainage channels and not throwing rubbish in drainage channels. 
Determinants of Green Total Factor Productivity in Indonesia: The Role of Environment in Economic Development with A Parametric Approach
Get PDFEnvironmental degradation occurs during economic development. Green Total Factor Productivity (TFP) was developed by incorporating environmental variables into traditional TFP to measure the efficiency of using technology to produce output, while balancing environmental quality. This study aims to determine the general description of economic development in Indonesia in 2015–2021, estimate economic development, and calculate Green TFP in Indonesia in 2015–2021, know the general description of Green TFP, and the variables that are thought to influence Green TFP in Indonesia in 2015–2021. 2021 and analyzed the variables influencing Green TFP in Indonesia in 2015–2021. The estimation results of the economic growth model showed a trade-off between economic growth and environmental quality in Indonesia. The Green TFP results for provinces in Indonesia are obtained using the Cobb-Douglas production function and panel data regression. The value of Green TFP in Indonesia is stagnant, at approximately 0.002. The analysis of variablesaffecting Green TFP using panel data regression shows that HDI, government spending on education, electricity consumption, industry share, capital structure, and trade openness have significant effects on Green TFP
The Display Behavior of Sub-Adult Greater Bird-of-Paradise (Paradisaea apoda): A Learning Process from an Adult?
Get PDFThe Greater Bird-of-Paradise (Paradisaea apoda) is a bird that performs a courtship display (lekking) to attract females during the mating season. The objective of this study was to examine the display behavior of adult and sub-adult males on lek trees as a learning process by a sub-adult and identify the lek trees. The research was conducted in the Tunas Timber Lestari Ltd. Production Forest in central mainland Papua, in a non-breeding season. After a lek tree was found, a video recording was conducted. Analysis was performed from the video. The lek tree was an emergent species with a dense canopy. An adult male was observed to perform a dance display in front of sub-adult males, even in the absence of females. When adult males performed display, the sub-adult were observed the adult males in an upside-down position. The sub-adult also danced, but not as complete as the adult, suggesting that there was a learning process by the sub-adult. This study revealed that the sub-adult/young males of the bird-of-paradise has the ability to dance inherit from their fathers, and then perfect the dance through practice and watching adults. The lek tree surely need to be protected for the survival for this species.Burung cenderawasih kuning-besar (Paradisaea apoda) adalah burung yang melakukan tarian (lekking) untuk menarik perhatian betina selama musim kawin. Tujuan dari penelitian ini adalah mengamati perilaku menari burung jantan dewasa dan jantan remaja di pohon lek sebagai proses pembelajaran oleh cendrawasih remaja, dan mengidentifikasi pohon lek tersebut. Penelitian ini dilakukan di Hutan Produksi PT Tunas Timber Lestari di daratan tengah Papua, diluar musim kawin. Setelah ditemukan pohon lek dan aktivitas lek, perekaman video dilakukan. Analisis dilakukan dari video tersebut. Pohon lek yang teramati adalah merupakan pohon emergen dengan kanopi rapat. Cendrawasih jantan dewasa terlihat melakukan tarian di depan jantan remaja, bahkan tidak ada betina. Ketika burung jantan dewasa melakukan tampilan, burung jantan remaja terlihat mengamati burung jantan dewasa dalam posisi terbalik. Burung jantan remaja juga menari, tetapi gerakannya tidak selengkap burung jantan dewasa, hal tersebut menunjukkan adanya proses pembelajaran oleh burung jantan remaja. Studi ini mengungkapkan bahwa burung jantan remaja dan anakan memiliki kemampuan menari yang diwarisi dari ayah mereka, dan kemudian menyempurnakan tarian melalui latihan dan mengamati dari burung dewasa. Pohon lek ini tentu perlu dilindungi untuk kelangsungan hidup spesies ini