282 research outputs found
Studi Pemisahan Baseflow menggunakan Metode Grafis dan Metode Recursive Digital Filter
No full textTechnique baseflow separation can be performed by graphics and Recursive Digital Filter (RDF) methods. This research was
conducted in to estimate the baseflow contribution at seven watersheds in administratif UPT PSDA Lumajang – Eastern part of East
Java. Two graphical methods of baseflow separation (Local Minimum Method dan Fixed Interval Method) and Eckhardt filter were
compared to separated baseflow from total flow. Eckhardt filter of the Recursive Digital Filter (RDF) method of baseflow separation..
Methodology consist of : (1) data inventorying (2) data processing, (3) calibrating and validating, and (4) models performances
evaluating. Daily discharge were used as main input for the analysis 1996-2005. Furthermore, each algorithm was calibrate using
daily discharge data for each year. The mean values of parameters obtained used to separate baseflow for whole period of record.
RMSE, R Squared and FDC used to evaluate the model performance during dry periode (Juli to September – with assumtion that there
was no rainfall occurred in this period). Calibration was conducted on each watershed with the same technique. Validation was
conducted using parameter values obtained from watershed having more complete data (Rawatamtu watershed) to others watersheds.
The results showed that Local Minimum Method perform better then others algorithms
APLIKASI SISTEM INFORMASI GEOGRAFIS UNTUK PEMETAAN KESESUAIAN HABITAT BANTENG
No full textBull is the mascot of the Baluran National Park (Situbondo, East Java Province). However, during the last decade population of bull (Bos
javanicus d'alton) tend to decrease and almost endangered. This study used GIS to produce suitability habitats map of bull at Baluran National
Park. Habitat suitability determined using four variables (slope, digital elevation map, land cover and distance from water source). Thematic
layers produced from four variabels, and a suitability map was developed using overlay and scoring map. Result showed that bull suitability
habitat map reached scores between 13-40, Baluran bull encounter points were 44 points each contained in a score: 29 (1 point), a score of 30 (6
points), 31 (4 points), 32 (6 points), 33 (8 points), 34 (8 points ), 35 (5 points), 36 (4 points) and 37 (2 points)
Studi Pendahuluan Pemisahan Baseflow: Studi Kasus 6 Metode RDF (Recursive Digital Filter)
No full textThis research dealt with estimation of baseflow contribution at severals watersheds in the area of UPT PSDA Pasuruan
(East Java, Indonesia). Six Recursive Digital Filter (RDF) methods were used to separate baseflow from total flow. Methodology
consist of : (1) data inventoring (2) data processing, (3) calibrating and validating, and (4) evaluating models performances. Daily
discharge were used as main input for the analysis. Then, each recursive digital filter output was used to separate baseflow from the
total daily discharge. Furthermore, each algorithm was calibrate using daily discharge data for each year. The mean values of
parameters obtained used to separate baseflow for whole periode of record. RMSE, Scatter plot and FDC used to evaluate the model
performance during dry periode in Juli to September (assuming that for this period no rainfall have occurred). Calibration were
conducted on each watershed using the same procedure. Validation was conducted only from watershed with complete data (Pekalen
watershed). The results showed that two filters (EWMA and Lynie Hollick) perform better then others algorithms
Studi Pendahuluan Pemisahan Baseflow: Studi Kasus 6 Metode RDF (Recursive Digital Filter)
Get PDFTechnique baseflow separation can be performed by methods Recursive Digital Filter (RDF). This research dealt with
estimation of baseflow contribution at seven watersheds in the administratif area of UPT PSDA Lumajang. Six methods filter were
used to separated baseflow from total flow. Methodology consist of : (1) data inventorying (2) data processing, (3) calibrating and
validating, and (4) models performances evaluating. Daily discharge were used as main input for the analysis 1996-2005.
Furthermore, each algorithm was calibrate using daily discharge data for each year. The mean values of parameters obtained were
then used to separate baseflow for whole periode of record. RMSE, scatter plot and FDC were used to evaluate the model
performance during dry periode (Juli to September) assuming that for this period no rainfall have occurred. Calibration was
conducted on each the watershed with the same way. Validation was conducted from the watershed complete data (Rawatamtu
watershed). The results showed that filter method, Lynie-Hollick perform better then others algorithm
STUDI PENDAHULUAN PEMISAHAN BASEFLOW: STUDI KASUS 6 METODE RDF (RECURSIVE DIGITAL FILTER) DI
No full textThis research dealt with estimation of baseflow contribution at five watersheds in the administratif area of UPT PSDA Pamekasan (East
Java, Indonesia). Six methods of Recursive Digital Filter (RDF) were used to separate baseflow from total flow. Methodology consist of : (1) data
inventoring (2) data processing, (3) calibrating and validating, and (4) models performances evaluating. Daily discharge were used as main input
for the analysis. Then, each recursive digital filter was used to separate baseflow from the total daily discharge. Furthermore, each algorithm was
calibrate using daily discharge data for each year. The mean values of parameters obtained were then used to separate baseflow for whole periode
of record. RMSE, Scatter plot, and FDC were used to evaluate the model performance during dry periode (Juli to September) assuming that for this
period no rainfall have occurred. Calibration was conducted on each the watershed with the same way. Validation was conducted from the
watershed with complete data (Blega watershed) to others watersheds. The results showed that two filters (EWMA and Lynie Hollick) perform better
then others algorithms
Kajian Efisiensi Penyimpanan Air Dari Berbagai Tekstur Tanah
No full textWater storage efficiency showed the water irrigation that meet crop needeed in terms of water demand in the growing media and the media's
ability to hold water. To determine the amount of water retained in the soil, it is necessary to study water storage efficiency in a variety of soil
texture were to determine the ability of water storage in loam, clay loam, and sandy loam soil textures. The study was conducted using a
completely randomized experimental design (CRD), which consist of three soil texture, i.e. sandy loam, loamy clay, and loam with 5
replications. Data analysis was performed using analysis of variance (ANOVA), Duncan-test, and bar charts. The results showed loam soil
texture is the most efficient in holding water. The amount of water that can be held was 11566 mm with 46.3% efficiency storage. Clay loam
can hold 9340 mm water with holding efficiency 37.4%, while sandy loam 7786 mm and 31.2%. Having the ability to retain water in the soil
texture known, water applied to soil should not exceed the ability of the soil to hold water. If the aplication exceeds the capacity, the water
supplied is not efficient
PENENTUAN DOSIS KOAGULAN PADA MUSIM HUJAN
No full textIn the rainy season the river water flow is higher than the dry season. The high discharge can cause flood. Flood are the factor that affect the
degradation of water quality at the Bedadung river. Clean water supply company in Jember is PDAM. Unit Tegal Gede is one of water
treatment installation owned by PDAM Jember. This research aimed to determine the optimum coagulant dosage and standard curves
coagulant dosage of alum in water treatment at Unit Tegal Gede PDAM during the rainy season. Variables tested include temperature, pH,
and turbidity. Determination dosage of alum used 3 methods namely dosage that used at PDAM Jember, trial and error, and the coagulation
floculation procesess. The results of the efficiency decrease at each V a r i a b l e s indicates that turbidity value the most influential to
the optimum coagulant dosage. To obtain the value of turbidity and a dosage of optimum processed using a regression equation. The
resulting equations the morning was Y = 0.740X + 30.41 with R2 = 0.950 and the afternoon was Y = 0.732X + 30.49 with R2 = 0.980
PENENTUAN DOSIS OPTIMUM PAC (Poly Aluminium Chloride) PADA PENGOLAHAN AIR BERSIH
No full textInstallation water treatment located in Jember region managed by the Regional Water Company (PDAM). IPA Tegal Besar was one of
water treatment installation owned by PDAM Jember. IPA Tegal Besar was using Poly Aluminium Chloride (PAC) as coagulat. Water
treatment processed by coagulation-flocculation. Until now the addition of PAC dosage to raw water in IPA Tegal Besar didn’t used the
optimum standard. The aim of this research were determining the optimum PAC dosage and made a standard curve between PAC and the
level of water turbidity. Decrease in each parameter were measured by observing at the value of the efficiency of turbidity and pH.
Determination optimum dosage of PAC at PDAM Jember used 3 methods namely dosage that used at PDAM Jember, trial and error, and
the processed of coagulation-flocculation. Turbidity value and optimum dosage of PAC was processed with simple linear regression to
obtain the equations. The equation was y = 0,155x + 17,55 in the morning and y = 0,138x + 20,34 in the afternoons. This equation used as
standard curve of PAC in IPA Tegal Besa
PENENTUAN KONSTANTA INFILTRASI PADA PERSAMAAN KOSTIAKOV MODIFIKASI
Get PDFInfiltration is a process of water absorption into the soil through the soil surface. Infiltration equation used to estimate amount of water. It
depends on the types of soil. The aim of this research was to know the infiltration rate and cumulative infiltration from some types of soil
texture, at 3 districts of Jember Regency, The research are done at Sumbersari, Kaliwates, and Pakusari District using Modified Kostiakov
Equation infiltration. Parameters observed were moisture soil content, soil texture, infiltration rate, and accumulation infiltration. The method
used in this case was experimental with double-ring infiltrometer inundation. This research showed infiltration constant were obtained also
varies such as loam Ŷ = 1,27t0,52 + 0,001, clay loam Ŷ= 0,67t0,41+ 0,004, and sandy loam Ŷ = 0,44t0,40+ 0,0001
ANALISIS KERAPATAN TEGAKAN DI KAWASAN TAMAN NASIONAL BALURAN
No full textThe purpose of this research was to create a stand density map based on land cover map using Quantum-GIS software
and to carry out a ground-check on density and vegetative variations in Baluran National Park. The research stages
consisted of mapping of land cover, field data collection using line square intercept sampling method, and data analysis
using the formula of stand density. Based on the mapping and analysis it was found that the largest population of the
biggest tree level catagory was in the mangrove ecosystem area (580 plants/ha). The largest population of the biggest
pole level catagory was in the acacia ecosystem area (1.680 plants/ha), and the acacia was dominancy the vegetation in
Baluran National Park. The largest population of the biggest sapling level catagory was in the primary forest region
(1.280 plants/ha). The largest population of the biggest seedling level catagory was in the scrubland ecosistem area
(5.240.000 plants/ha)
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