scholarly journals ESTIMASI NILAI LINGKUNGAN PERKEBUNAN KELAPA SAWIT DITINJAU DARI NERACA AIR TANAMAN KELAPA SAWIT (STUDI KASUS: PERKEBUNAN KELAPA SAWIT DI KECAMATAN DAYUN, KABUPATEN SIAK, PROPINSI RIAU)THE ESTIMATION OF OIL PALM PLANTATION ...

Agromet ◽  
2010 ◽  
Vol 24 (1) ◽  
pp. 23 ◽  
Author(s):  
Isa Teguh Widodo ◽  
Bambang Dwi Dasanto
Keyword(s):  
Water Balance ◽  
Oil Palm ◽  
Water Availability ◽  
Water Conservation ◽  
Contingent Valuation Method ◽  
Economic Value ◽  
Balance Model ◽  
Palm Tree ◽  
Conservation Program ◽  
Oil Palm Plantation

Dayun area is one of the centers of oil palm plantation in Siak Regency. State-owned company that develops oil palm plantation in Dayun is PT Perkebunan Nusantara V (PTPN V) which is the first company developing oil palm plantation in Siak Regency. The oil palm plantations cause various effects to the environment; one of them is the decreasing water availability for the water stakeholders. The decreasing water availability causes additional cost to the community. The objectives of this study were to determine the decreasing of water availability which was caused by oil palm plantation, and its cost to meet the needs of water. The study used water balance model by Thornwhite 1957 and Willingness to Pays (WTP) analysis using questionaire of Contingent Valuation Method (CVM) in Sawit Permai, Dayun Subdistrict, Siak Regency. The land cover, before and after, affects the water balance which impacts the water availability in Dayun. The decreasing water availability was comparable with the increasing water demand in oil palm plantation, equal to 67 mm/year. Oil palm plantation had greater runoff than that of forest. The need of water in oil palm plantation in Dayun was 42.728 liters/ha/day, with the daily need of a single palm tree equal to 0,012 m3/s. Based on the analysis of debt estimation, there is debt decreasing which indicates the decreasing water availability in Dayun, around 349 m3/s yearly. The estimated value of the environment for oil palm plantation by water resources consumption based on the difference of forest and oil palm plantation during the dry season (JJA) is equal to Rp 7.500.000. Average WTP for the water conservation program is Rp 26.400, with WTP maximum and minimum up to Rp 45.000 and Rp 5.000, respectively. The economic value of water conservation program is Rp 18.850.000/month.Dayun area is one of the centers of oil palm plantation in Siak Regency. State-owned company that develops oil palm plantation in Dayun is PT Perkebunan Nusantara V (PTPN V) which is the first company developing oil palm plantation in Siak Regency. The oil palm plantations cause various effects to the environment; one of them is the decreasing water availability for the water stakeholders. The decreasing water availability causes additional cost to the community. The objectives of this study were to determine the decreasing of water availability which was caused by oil palm plantation, and its cost to meet the needs of water. The study used water balance model by Thornwhite 1957 and Willingness to Pays (WTP) analysis using questionaire of Contingent Valuation Method (CVM) in Sawit Permai, Dayun Subdistrict, Siak Regency. The land cover, before and after, affects the water balance which impacts the water availability in Dayun. The decreasing water availability was comparable with the increasing water demand in oil palm plantation, equal to 67 mm/year. Oil palm plantation had greater runoff than that of forest. The need of water in oil palm plantation in Dayun was 42.728 liters/ha/day, with the daily need of a single palm tree equal to 0,012 m3/s. Based on the analysis of debt estimation, there is debt decreasing which indicates the decreasing water availability in Dayun, around 349 m3/s yearly. The estimated value of the environment for oil palm plantation by water resources consumption based on the difference of forest and oil palm plantation during the dry season (JJA) is equal to Rp 7.500.000. Average WTP for the water conservation program is Rp 26.400, with WTP maximum and minimum up to Rp 45.000 and Rp 5.000, respectively. The economic value of water conservation program is Rp 18.850.000/month.

scholarly journals Effect of oil palm (Elaeis guineensis Jacq.) plantations on individual-level diet variation of Hylaeamys megacephalus (G. Fisher 1814) (Rodentia, Cricetidae) in eastern Amazon Forest

2019 ◽  
Vol 19 (2) ◽  
Author(s):  
Simone Almeida Pena ◽  
Ana Cristina Mendes-Oliveira
Keyword(s):  
Palm Oil ◽  
Oil Palm ◽  
Elaeis Guineensis ◽  
Stomach Contents ◽  
Niche Overlap ◽  
Palm Tree ◽  
Amazon Forest ◽  
Tree Plantation ◽  
Forest Environment ◽  
Oil Palm Plantation

Abstract: In this study we described the diet of Hylaeamys megacephalus (G. Fisher, 1814) and investigated the degree of individual variation in the diet of this species among the Amazon Forest and the oil palm plantation. We analyzed the stomach contents of 36 individuals, of whom 11 were collected in the forest and 25 captured in the palm oil palm plantation. The H. megacephalus diet consisted of 18 food items, of which 12 were animal composition and eight were vegetable composition. The niche amplitude of the species was narrower in the forest area (Baforest = 0.013) compared to the palm tree plantation area (Bapalm = 0.478). This shows that individuals have greater niche overlap in forest areas, while in the plantation areas the animals expand their food niche. In addition, the values of the mean of the individual diet in relation to the diet of the entire population were lower in the palm oil palm plantation environment (ISpalm = 0.164) than in the Forest environment (ISforest = 0.357), indicating a high specialization in the palm oil plantation. These results indicate a population mechanism to reduce intraspecific competition in response to scarce resources.

scholarly journals Assessing the Influence of UAV Altitude on Extracted Biophysical Parameters of Young Oil Palm

2020 ◽  
Vol 12 (18) ◽  
pp. 3030
Author(s):  
Ram Avtar ◽  
Stanley Anak Suab ◽  
Mohd Shahrizan Syukur ◽  
Alexius Korom ◽  
Deha Agus Umarhadi ◽  
...  
Keyword(s):  
Oil Palm ◽  
Precision Agriculture ◽  
Point Clouds ◽  
Aerial Images ◽  
Surface Model ◽  
Palm Tree ◽  
Flight Altitude ◽  
Biophysical Parameters ◽  
Oil Palm Plantation ◽  
Red Edge

The information on biophysical parameters—such as height, crown area, and vegetation indices such as the normalized difference vegetation index (NDVI) and normalized difference red edge index (NDRE)—are useful to monitor health conditions and the growth of oil palm trees in precision agriculture practices. The use of multispectral sensors mounted on unmanned aerial vehicles (UAV) provides high spatio-temporal resolution data to study plant health. However, the influence of UAV altitude when extracting biophysical parameters of oil palm from a multispectral sensor has not yet been well explored. Therefore, this study utilized the MicaSense RedEdge sensor mounted on a DJI Phantom–4 UAV platform for aerial photogrammetry. Three different close-range multispectral aerial images were acquired at a flight altitude of 20 m, 60 m, and 80 m above ground level (AGL) over the young oil palm plantation area in Malaysia. The images were processed using the structure from motion (SfM) technique in Pix4DMapper software and produced multispectral orthomosaic aerial images, digital surface model (DSM), and point clouds. Meanwhile, canopy height models (CHM) were generated by subtracting DSM and digital elevation models (DEM). Oil palm tree heights and crown projected area (CPA) were extracted from CHM and the orthomosaic. NDVI and NDRE were calculated using the red, red-edge, and near-infrared spectral bands of orthomosaic data. The accuracy of the extracted height and CPA were evaluated by assessing accuracy from a different altitude of UAV data with ground measured CPA and height. Correlations, root mean square deviation (RMSD), and central tendency were used to compare UAV extracted biophysical parameters with ground data. Based on our results, flying at an altitude of 60 m is the best and optimal flight altitude for estimating biophysical parameters followed by 80 m altitude. The 20 m UAV altitude showed a tendency of overestimation in biophysical parameters of young oil palm and is less consistent when extracting parameters among the others. The methodology and results are a step toward precision agriculture in the oil palm plantation area.

Soil clay content, rainfall, and toposequence positions determining spatial variation in field water availability as estimated by a water balance model for rainfed lowland rice

2012 ◽  
Vol 63 (6) ◽  
pp. 529 ◽  
Author(s):  
T. Inthavong ◽  
M. Tsubo ◽  
S. Fukai
Keyword(s):  
Water Balance ◽  
Water Availability ◽  
Clay Content ◽  
Lowland Rice ◽  
Balance Model ◽  
Yield Reduction ◽  
Growing Period ◽  
Rainfed Lowland ◽  
Soil Clay ◽  
Soil Clay Content

Drought is a major limiting factor for the production of rainfed rice in the Mekong Region. Thus, estimation of the length of growing period (LGP) based on estimation of the development of water deficit is essential for sound planning of agricultural development. A recently developed soil-water balance model was used to quantify the availability of water for rice crops and yield reduction due to water deficit. Field water availability is known to be largely affected by soil type and rainfall pattern, and their separate effects were investigated in this study of a spatial analysis of LGP, using inputs for rainfed lowland rice in Savannakhet province in central Laos. The analysis showed that the start of growing period (SGP) and end of growing period (EGP) were affected largely by geographical variations in rainfall and soil clay content, respectively. Also, the areas having relatively short LGP were generally associated with large yield reduction because of low water availability associated with coarse-textured soils. At local scale, field water availability varied from upper to lower positions of a sloping land (toposequence) in the rainfed lowland ecosystem of the Mekong region, causing variation in yield within the toposequence. Using the level of field water determined around flowering time at different toposequence positions in 45 farms, estimated yield reduction was compared in seven main rice-growing districts of the province. Variability of yield loss, associated with variation in water availability, was larger across the toposequence positions than across districts, showing the importance of local variability in determining yield in rainfed lowland rice. The present approach of a combination of simulation model and GIS is adopted for characterisation of the water environment for rainfed lowland rice in other parts of Laos, as well as in neighbouring Thailand and Cambodia.

scholarly journals Hydroclimatic regimes: a distributed water-balance framework for hydrologic assessment and classification

2014 ◽  
Vol 11 (3) ◽  
pp. 2933-2965 ◽  
Author(s):  
P. K. Weiskel ◽  
D. M. Wolock ◽  
P. J. Zarriello ◽  
R. M. Vogel ◽  
S. B. Levin ◽  
...  
Keyword(s):  
Surface Water ◽  
Water Balance ◽  
20Th Century ◽  
Water Availability ◽  
Land Surface ◽  
Resource Assessment ◽  
Annual Runoff ◽  
Balance Model ◽  
Equal Weight ◽  
Terrestrial Water

Abstract. Runoff-based indicators of terrestrial water availability are appropriate for humid regions, but have tended to limit our basic hydrologic understanding of drylands – the dry-sub-humid, semi-arid, and arid regions which presently cover nearly half of the global land surface. In response, we introduce an indicator framework that gives equal weight to humid and dryland regions, accounting fully for both vertical (precipitation + evapotranspiration) and horizontal (groundwater + surface-water) components of the hydrologic cycle in any given location – as well as fluxes into and out of landscape storage. We apply the framework to a diverse hydroclimatic region (the conterminous USA), using a distributed water-balance model consisting of 53 400 networked landscape hydrologic units. Our model simulations indicate that about 21% of the conterminous USA either generated no runoff or consumed runoff from upgradient sources on a mean-annual basis during the 20th century. Vertical fluxes exceeded horizontal fluxes across 76% of the conterminous area. Long-term average total water availability (TWA) during the 20th century, defined here as the total influx to a landscape hydrologic unit from precipitation, groundwater, and surface water, varied spatially by about 400 000-fold, a range of variation ~100 times larger than that for mean-annual runoff across the same area. The framework includes, but is not limited to classical, runoff-based approaches to water-resource assessment. It also incorporates and re-interprets the green-blue water perspective now gaining international acceptance. Implications of the new framework for hydrologic assessment and classification are explored.

scholarly journals NERACA AIR LAHAN UNTUK PENGEMBANGAN TANAMAN KELAPA SAWIT (Elaeis guinensis Jacq), DI KECAMATAN SANGKUB, KABUPATEN BOLAANG MONGONDOW UTARA

2017 ◽  
Vol 13 (3A) ◽  
pp. 33
Author(s):  
Silvana E. Kaeng ◽  
Johannes E.X. Rogi ◽  
Jantje ., Pongoh
Keyword(s):  
Water Balance ◽  
Simulation Model ◽  
Oil Palm ◽  
Secondary Data ◽  
Balance Model ◽  
Water Requirements ◽  
Model Method ◽  
Water Surplus ◽  
One Year ◽  
Land Water

This study aims to find out the water balance in Sangkub Sub-district, North Bolaang Mongondow Regency for oil palm cultivation with water balance simulation model developed by Handoko (1994) and Rogi (2002). The study was conducted from May - December 2016. This research uses simulation model method; the data used in this research is secondary data. The data analysis used run model of water balance of land and formula calculation of land water balance. The study found that the amount of water surplus from the run of the water balance model and calculations based on the formula in one year cannot meet the water requirements of oil palm crops, so that oil palm plantations cannot be cultivated in Sangkub Sub-district. This is due to the existence of rice cultivated crops prior to oil palm cultivation, where both plants require relatively large amount of water.

scholarly journals Temporal Water Balance Analysis in Different Climatic Scenarios in Oyo State, Nigeria

2019 ◽  
Vol 7 (2) ◽  
Author(s):  
Timothy Oyebamiji Ogunbode ◽  
Ifatokun Paul Ifabiyi
Keyword(s):  
Water Balance ◽  
Water Availability ◽  
Agricultural Development ◽  
Balance Model ◽  
Agricultural Practice ◽  
Dry Spells ◽  
Climatic Scenarios ◽  
Balance Analysis ◽  
Temperature Records ◽  
Increasing Trends

The study was conducted to examine water availability in different climatic scenarios in Oyo State. The data used comprised of rainfall and temperature records. The spans of the data used vary from one station to the other: 38-year data for Ibadan and 37-year for Ogbomoso stations, both collected from NIMET Office, Ilorin while 11-year also collected from the Office of Oyo State Agricultural Development Programme (OYSADEP) Headquarters at Shaki were available for Shaki Station. Evapotranspiration data for the three stations were empirically generated while water balance model was computed using MATLAB R2007a version in order to determine the respective water availability and the regression analysis was used to determine rainfall trends. The results showed that rainfall amounts vary from year to year and also increasing trends in the three stations over the period examined. It was also discovered that in all the periods investigated across the stations, Ibadan has 81.58%, Shaki, 81.81% and Ogbomoso, 56.80% as wet years indicating that there is abundant water resources in Oyo State. It is recommended that strategies  be put in place to exploit excess rainwater for various purposes especially by increasing the capacity of water reservoirs and dams across the State for development of pipe borne water network and also, for irrigation farming during dry spells. Further investigation is recommended on water balance and its implications for agricultural practice in the study area.

scholarly journals Penerapan Zero Runoff System (ZROS) dan Efektivitas Penurunan Limpasan Permukaan Pada Lahan Miring di DAS Cidanau, Banten

2017 ◽  
Vol 23 (2) ◽  
pp. 102 ◽  
Author(s):  
Yanuar Chandra Wirasembada ◽  
Budi Indra Setiawan ◽  
Satyanto Krido Saptomo
Keyword(s):  
Water Balance ◽  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Water Conservation ◽  
Water Balance Model ◽  
Balance Model ◽  
Coefficient Of Determination ◽  
Before And After ◽  
Zero Runoff

Runoff is one of flood and erosion causal factor in Indonesia. Runoff occurred when rainfall cannot be infiltrated and flowed on the ground surface. Cidanau watershed has quite high rainfall average (2573 mm/year) so it has high runoff potential. Zero Runoff System (ZROS) is one of water conservation way which can infiltrate runoff to the ground using permeation structures. ZROS’s successful parameter in order to decreasing runoff rate can be observed by the soil water content differences before and after ZROS application. Soil water content estimation was conducted by water balance model with and without runoff and then it is compared with soil water content from measuring. The simulation results indicated that soil water content in the research field before and after ZROS application is 0.476 and 0.569 m3/m3 respectively. The simulation is also conducted for past 10 years (2004-2013) and resulted higher soil water content if ZROS were applied. This results indicates that ZROS capable to decrease and permeate runoff to the ground and then increase soil water content level. Water balance model with and without runoff has coefficient of determination (R2) 0.606. It means that this model could simulate the soil water content differences before and after ZROS application valid relatively.

scholarly journals Effect of four soil and water conservation practices on soil physical processes in a non-terraced oil palm plantation

2015 ◽  
Vol 145 ◽  
pp. 62-71 ◽  
Author(s):  
Abolfath Moradi ◽  
Christopher Teh Boon Sung ◽  
Kah Joo Goh ◽  
Ahmad Husni Mohd Hanif ◽  
Che Fauziah Ishak
Keyword(s):  
Oil Palm ◽  
Water Conservation ◽  
Soil And Water Conservation ◽  
Conservation Practices ◽  
Physical Processes ◽  
Oil Palm Plantation ◽  
Soil And Water
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