Comparison of Kriging and Inverse Distance Weighted (Idw) Interpolation Methods in Lineament Extraction and Analysis

Setianto, Agung; Triandini, Tamia

doi:10.22146/jag.7204

Cited by 192 publications

(126 citation statements)

References 4 publications

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“…The inverse distance weight method (IDW) [33] in ArcGIS was utilized to spatially interpolate the distribution of the EC GW and groundwater depths across the field to generate corresponding values for the 18 harvest locations. The relationship between yield and ET C , applied irrigation water, or transpiration is known as the crop production function [7].…”

Section: Groundwater Contribution To Crop Evapotranspiration and Seedmentioning

confidence: 99%

Impact of Deficit Irrigation on Shallow Saline Groundwater Contribution and Sunflower Productivity in the Imperial Valley, California

Eltarabily

Burke

Bali

2020

Water

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Yield and production functions of sunflower (Helianthus annuus) were evaluated under full and deficit irrigation practices with the presence of shallow saline groundwater in a semi-arid region in the Imperial Valley of southern California, USA. A growing degree day (GDD) model was utilized to estimate the various growth stages and schedule irrigation events throughout the growing season. The crop was germinated and established using overhead irrigation prior to the use of a subsurface drip irrigation (SDI) system for the remainder of the growing season. Four irrigation treatments were implemented: full irrigation (100% full sunflower crop evapotranspiration, ETC), two reduced irrigation scenarios (95% ETC and 80% ETC), and a deficit irrigation scenario (65% ETC). The salinity of the irrigation water (EC) (Colorado River water) was nearly constant at 1.13 dS·m−1 during the growing season. The depth to groundwater and groundwater salinity (ECGW) were continuously monitored in five 3 m deep observation wells. Depth to groundwater fluctuated slightly under the full and reduced irrigation treatments, but drastically increased under deficit irrigation, particularly toward the end of the growing season. Estimates of ECGW ranged from 7.34 to 12.62 dS·m−1. The distribution of soil electrical conductivity (ECS) and soil matric potential were monitored within the active root zone (120 cm) at selected locations in each of the four treatments. By the end of the experiment, soil salinity (ECS) across soil depths ranged from 1.80 to 6.18 dS·m−1. The estimated groundwater contribution to crop evapotranspiration was 9.03 cm or approximately 16.3% of the ETC of the fully irrigated crop. The relative yields were 91.8%, 82.4%, and 83.5% for the reduced (95% and 80% ETC) and deficit (65% ETC) treatments, respectively, while the production function using applied irrigation water (IW) was: yield = 0.0188 × (IW)2 − 15.504 × IW + 4856.8. Yield reduction in response to water stress was attributed to a significant reduction in both seed weight and the number of seed produced resulting in overall average yields of 2048.9, 1879.9, 1688.1, and 1710.3 kg·ha−1 for the full, both reduced, and deficit treatments, respectively. The yield response factor, ky, was 0.63 with R2 = 0.745 and the irrigation water use efficiencies (IWUE) were 3.70, 3.57, 3.81, and 4.75 kg·ha−1·mm−1 for the full, reduced, and deficit treatments, respectively. Our results indicate that sunflowers can sustain the implemented 35% deficit irrigation with root water uptake from shallow groundwater in arid regions with a less than 20% reduction in yield.

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Section: Groundwater Contribution To Crop Evapotranspiration and Seedmentioning

confidence: 99%

Impact of Deficit Irrigation on Shallow Saline Groundwater Contribution and Sunflower Productivity in the Imperial Valley, California

Eltarabily

Burke

Bali

2020

Water

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“…List and location of 4th of July 2019 fireworks locations and their starting times, as shown in Figure 6. The July 4th holiday PM 2.5 observations from TRAX are shown in Figure 6, with spatially interpolated PM 2.5 estimates using inverse distance weighting [52] presented in Figure 7. Before the fireworks began (20:00-20:59 MDT, Figure 6a), the PM 2.5 concentrations are low throughout the SLV, with the exception of the reading at RAIL1.…”

Section: Elevated Pm 25 Case Study: July 4th 2019 Fireworkmentioning

confidence: 99%

“…A benefit of the TRAX platform is that the rail lines are located along the most densely populated areas, while the outer edges of the county are primarily composed of mountains or wetlands and the Great Salt Lake. The July 4 th holiday PM2.5 observations from TRAX are shown in Figure 6, with spatially interpolated PM2.5 estimates using inverse distance weighting [52] presented in Figure 7. Before the fireworks began (20:00-20:59 MDT, Figure 6a.…”

Section: Elevated Pm 25 Case Study: July 4th 2019 Fireworkmentioning

confidence: 99%

The TRAX Light-Rail Train Air Quality Observation Project

et al. 2019

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Observing air quality from sensors onboard light rail cars in Salt Lake County, Utah began as a pilot study in 2014 and has now evolved into a five-year, state-funded program. This metropolitan region suffers from both elevated ozone levels during summer and high PM 2.5 events during winter. Pollution episodes result predominantly from local anthropogenic emissions but are also impacted by regional transport of dust, chemical precursors to ozone, and wildfire smoke, as well as being exacerbated by the topographical features surrounding the city. Two electric light-rail train cars from the Utah Transit Authority light-rail Transit Express ("TRAX") system were outfitted with PM 2.5 and ozone sensors to measure air quality at high spatial and temporal resolutions in this region. Pollutant concentration data underwent quality control procedures to determine whether the train motion affected the readings and how the sensors compared against regulatory sensors. Quality assurance results from data obtained over the past year show that TRAX Observation Project sensors are reliable, which corroborates earlier preliminary validation work. Three case studies from summer 2019 are presented to illustrate the strength of the finely-resolved air quality observations: (1) an elevated ozone event, (2) elevated particulate pollution resulting from 4th of July fireworks, and (3) elevated particle pollution during a winter time inversion event. The mobile observations were able to capture spatial gradients, as well as pollutant hotspots, during both of these episodes. Sensors have been recently added to a third light rail train car, which travels on a north-south oriented rail line, where air quality was unable to be monitored previously. The TRAX Observation

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“…Jadi semakin dekat jarak antara titik sampel dan titik yang akan diestimasi maka semakin besar bobotnya, begitu juga sebaliknya. Metode ini telah berhasil dimanfaatkan untuk interpolasi pada data spasial [28,29,30] dan liniasi [31].…”

Section: Metode Inverse Distanceunclassified

“…Ilustrasi interpolasi metode ini ditunjukkan oleh Gambar 5. Faktor utama yang mempengaruhi keakuratan interoplator jarak terbalik adalah nilai parameter pangkat [31]. Pada penelitian ini, metode inverse distance menggunakan parameter pangkat 2.…”

Section: Metode Inverse Distanceunclassified

Identifikasi Ketebalan Tanah Gambut Berdasarkan Nilai Resistivitas 3D: Studi Kasus Daerah Tempat Pembuangan Akhir Batu Layang Kota Pontianak

Muliadi¹,

Zulfian²,

Muhardi³

2019

Positron

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AbstrakIdentifikasi ketebalan tanah gambut telah berhasil dilakukan menggunakan metode geolistrik resistivitas. Informasi ini sangat penting untuk mitigasi penyebaran lindi dan proses pengembangan pembangunan Tempat Pembuangan Akhir Batu Layang. Pada penelitian ini, dibuat 6 buah lintasan yang memiliki panjang masing-masing 117 m dengan tiga lintasan memotong tiga lintasan lainnya. Dari hasil penelitian, diperoleh nilai resistivitas pada lokasi penelitian sebesar (1,0703 -706,6) Ωm. Tanah gambut diidentifikasi pada kedalaman (4 -7,6) m dengan nilai resistivitas sebesar (40 -706,6) Ωm. Hasil ini telah divalidasi dengan sampel tanah yang diambil dari dua titik pengeboran hingga kedalaman 5 m. Berdasarkan hasil pengeboran tersebut, ketebalan tanah gambut sebesar 4 m dan 4,5 m. Selanjutnya, dari penampang resistivitas 2D, dibuat model resistivitas 3D menggunakan metode interpolasi inverse distance. Model resisitivtas 3D memberikan informasi sebaran ketebalan tanah gambut pada lokasi penelitian.

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Comparison of Kriging and Inverse Distance Weighted (Idw) Interpolation Methods in Lineament Extraction and Analysis

Cited by 192 publications

References 4 publications

Impact of Deficit Irrigation on Shallow Saline Groundwater Contribution and Sunflower Productivity in the Imperial Valley, California

Impact of Deficit Irrigation on Shallow Saline Groundwater Contribution and Sunflower Productivity in the Imperial Valley, California

The TRAX Light-Rail Train Air Quality Observation Project

Identifikasi Ketebalan Tanah Gambut Berdasarkan Nilai Resistivitas 3D: Studi Kasus Daerah Tempat Pembuangan Akhir Batu Layang Kota Pontianak

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