Inverse distance weighting interpolated soil properties and their related landslide occurrences

Santoso, Purwanto Bekti; Yanto, Yanto; Apriyono, Arwan; Suryani, Rani

doi:10.1051/matecconf/201819503013

Cited by 9 publications

(6 citation statements)

References 3 publications

(2 reference statements)

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“…Spatial and seasonal distribution of Aedes immatures were analyzed by geostatistical in ArcGIS 10.4 (ESRI, USA). Inverse distance weighted (IDW) interpolation technique [33,34] was used to visualize the areas with high larval densities. Representation of IDW maps show patterns based on the distance from one observed point to another.…”

Section: Discussionmentioning

confidence: 99%

Habitat characteristics and insecticide susceptibility of Aedes aegypti in the Ifakara area, south-eastern Tanzania

et al. 2020

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Background: Aedes-borne diseases such as dengue and chikungunya constitute constant threats globally. In Tanzania, these diseases are transmitted by Aedes aegypti, which is widely distributed in urban areas, but whose ecology remains poorly understood in small towns and rural settings. Methods:A survey of Ae. aegypti aquatic habitats was conducted in and around Ifakara, a fast-growing town in south-eastern Tanzania. The study area was divided into 200 × 200 m search grids, and habitats containing immature Aedes were characterized. Field-collected Ae. aegypti were tested for susceptibility to common public health insecticides (deltamethrin, permethrin, bendiocarb and pirimiphos-methyl) in the dry and rainy seasons. Results:Of 1515 and 1933 aquatic habitats examined in the dry and rainy seasons, 286 and 283 contained Aedes immatures, respectively (container index, CI: 18.9-14.6%). In the 2315 and 2832 houses visited in the dry and rainy seasons, 114 and 186 houses had at least one Aedes-positive habitat, respectively (house index, HI: 4.9-6.6%). The main habitat types included: (i) used vehicle tires and discarded containers; (ii) flowerpots and clay pots; and (iii) holes made by residents on trunks of coconut trees when harvesting the coconuts. Used tires had highest overall abundance of Ae. aegypti immatures, while coconut tree-holes had highest densities per habitat. Aedes aegypti adults were susceptible to all tested insecticides in both seasons, except bendiocarb, against which resistance was observed in the rainy season. Conclusions:To our knowledge, this is the first study on ecology and insecticide susceptibility of Ae. aegypti in Ifakara area, and will provide a basis for future studies on its pathogen transmission activities and control. The high infestation levels observed indicate significant risk of Aedes-borne diseases, requiring immediate action to prevent potential outbreaks in the area. While used tires, discarded containers and flowerpots are key habitats for Ae. aegypti, this study also identified coconut harvesting as an important risk factor, and the associated tree-holes as potential targets for Aedes control. Since Ae. aegypti mosquitoes in the area are still susceptible to most insecticides, effective control could be achieved by combining environmental management, preferably involving communities, habitat removal and insecticide spraying.

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Section: Discussionmentioning

confidence: 99%

Habitat characteristics and insecticide susceptibility of Aedes aegypti in the Ifakara area, south-eastern Tanzania

et al. 2020

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“…Inverse distance weighting (IDW), the interpolation method was used to estimate the soil properties (Santoso et al 2018). A neighborhood about the interpolated point is identified, and a weighted average of the observation values within proximity.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of RISAT-1 data for soil moisture retrieval in semi-arid tropics of India

et al. 2022

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The selection of better polarisation and incidence angle for soil moisture retrieval using RISAT-1 microwave data was experimented at Hayathnagar research farm of ICAR-CRIDA, Hyderabad. Fine Resolution Sensor (FRS-1) data (spatial resolution of 3 m) and Medium Resolution ScanSAR (MRS) data (spatial resolution of 25 m) acquired from circular and dual polarised microwave data were used for the retrieval of soil moisture and to identify the best polarisation suitable for the study area. The evaluation was carried out during 2016-17. FRS-1 data was more accurate than MRS data for the extraction of soil moisture in the study area. Circular and dual-Polarisation retrieved soil moisture values were compared with volumetric soil moisture values for assessing the better polarisation. Dual polarisation and the incident angle between 15-20 degrees with R2=0.952 performed better as compared to circular polarisation with more or less than 20 degrees' incident angle. A correction factor of -0.723 was derived and applied to FRS-1 data with less than a 20-degree incident angle for getting real soil moisture values on the spatio-temporal basis to optimize the management of natural ecosystems under climate change threat.

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“…Reinforced of slope with nails and ground anchors can be used to improve the stability of a slope. Slope stability calculation is required to determine the safety factor of a slope [7]. The calculation of slope stability requires the layer description,…”

Section: Resultsmentioning

confidence: 99%

Modelling of ensuring slope stability

Bašková

Panulinová

2020

MATEC Web Conf.

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Analysis and assessment of the slopes stability are an important in geotechnical engineering for all the times. The first and foremost requirement for the modelling and design of slope is to guarantee their safety and reliability during their service life. In analysing the overall stability of the ground, of soil or rock, all relevant modes of failure shall be taken into account. When modelling a slope stability processes, it should be considered: soil layering, occurrence and inclination of discontinuities, seepage and pore-water pressure distribution, shortand long-term stability, type of failure (circular or non-circular surface; toppling; flow), using of numerical methods. The paper deals with the modelling of ensuring slope stability.

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Inverse distance weighting interpolated soil properties and their related landslide occurrences

Cited by 9 publications

References 3 publications

Habitat characteristics and insecticide susceptibility of Aedes aegypti in the Ifakara area, south-eastern Tanzania

Habitat characteristics and insecticide susceptibility of Aedes aegypti in the Ifakara area, south-eastern Tanzania

Evaluation of RISAT-1 data for soil moisture retrieval in semi-arid tropics of India

Modelling of ensuring slope stability

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