«Povitrya» Web-Based Software System for Operational Forecasting Atmospheric Pollution after Manmade Accidents in Ukraine

Kovalets, Ivan V.; Maistrenko, S.Ya.; Khalchenkov, O.V.; Zagreba, T.O.; Khurtsilava, K.V.; Anulich, S.M.; Bespalov, V.P.; Udovenko, Oleg

doi:10.15407/scin13.06.013

Cited by 5 publications

(4 citation statements)

References 2 publications

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“…The source parameters were calculated using the "Povitrya" system [14], which is in the public domain [15]. The system "Povіtrya" implements screening models for predicting damage zones during HS emissions [3,4], the intermediate results of which are the mass of the primary cloud (m 1 ) and the evaporation time (τ) of the secondary cloud.…”

Section: Methodsmentioning

confidence: 99%

The use of environmental decision support systems for modeling of atmospheric pollution following the chemical accidents

Kovalets¹,

Bespalov²,

Maistrenko³

et al. 2022

SRIT

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We studied the possibility of the combined application of screening models to assess the characteristics of sources in accidents at storage facilities for hazardous substances with complex models of atmospheric transport as part of modern decision support systems to calculate air pollution in a wide range of spatial and temporal scales. The evaporation time following an emergency spill, estimated by screening models, is used to set the emission intensity and calculate the atmospheric transport by the RODOS nuclear emergency response system. For the accident in Chernihiv on March 23, 2022, it was estimated that the maximum permissible concentration of ammonia 0.2 mg/m3 was exceeded at distances up to 75 km from the source. The dependence of the calculated maximum concentrations on time is close to asymptote cmax ~ t-4.5 up to 15 h after emission, which is consistent with the asymptote σ ~ t3/2 for the time dependence of the sizes of puffs following turbulent dispersion of instantaneous releases.

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Section: Methodsmentioning

confidence: 99%

The use of environmental decision support systems for modeling of atmospheric pollution following the chemical accidents

Kovalets¹,

Bespalov²,

Maistrenko³

et al. 2022

SRIT

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“…Відповідно, у попередніх роботах авторів веб-сервіс прогнозування атмосферних забруднень "Повітря" [2] було налаштовано на одній із віртуальних машин (ВМ) УНГ та додано його до каталогу сервісів [3]. У такій реалізації є низка недоліків, пов'язаних із відмовостійкістю та довгим часом повторного налаштування машини у разі проблем із ВМ, на якій проводиться розрахунок.…”

Section: вступunclassified

“…Для забезпечення виконання обчислень на основі моделі атмосферного перенесення забруднень CALPUFF [6] у складі веб-системи «Повітря» [2] у хмарному середовищі необхідно провести інтеграцію розробленої програми автоматизованого створення віртуальної машини після запиту користувача на розрахунок та модуля безпосереднього формування прогнозу.…”

Section: інтегрування програми автоматизації вм у системі прогнозуван...unclassified

Ensuring the functioning of the system for forecasting air pollution in the cloud infrastructure by automating the creation of virtual machines

Synkevych¹,

Maistrenko²,

Dontsov-Zahreba³

et al. 2022

MMS

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The paper improves the web service Povitrya aimed at forecasting air pollution in case of man-made disasters by saving the configured CALPUFF atmospheric transport model in a pre-configured image and integrating into the system of software tools for the automatic creation of virtual machines from a pre-saved image after the user request. To do this, an image based on the Ubuntu operating system was configured in the Ukrainian National Grid Infrastructure, to-gether with the necessary CALPUFF atmospheric transport model libraries. Based on the saved image, one can quickly create and run a virtual machine and start the calculations. After the cal-culation, the Povitrya system removes the virtual machine, freeing up cloud resources for other tasks. The example of test calculations shows that due to the transfer of the module of calcula-tion of atmospheric transport to the cloud infrastructure it was possible to reduce the calculation time of the CALPUFF model by almost 2 times, and the download time of weather forecast data was reduced by more than 10 times. In total, the system calculation time after the user's request was reduced by 4 times for the test configuration. In addition, the resilience of the system to cloud infrastructure failures has been increased. The created archive with the operating system and configured for the CALPUFF model runs can also be transferred to other private clouds (for example, Amazon, Google Cloud Platform, Microsoft Azure) and their virtual machines could be used. Thus, the developed web system corresponds to modern trends in the implementation of cloud computing technologies, if necessary, allows scaling and can be adapted to other pri-vate or public cloud computing infrastructures. The system is available for registered users by the link: http://cloud-2.bitp.kiev.ua/ airsystem_english/airsystem.html.

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“…У попередніх роботах [1,2] розроблено та надано у відкритий доступ систему «Повітря» для розрахунку атмосферного розповсюдження забруднень після викидів в атмосферу внаслідок техногенних аварій. Окрім розрахунку концентрацій забруднюючих речовин (ЗР) у повітрі, для ряду випадків важливо розраховувати осадження хімічних речовин на поверхню Землі та на рослинність.…”

Section: вступunclassified

Determination of the parameters for the calculation of dry and wet deposition of chemicals in the Povitrya system

Bespalov¹,

Khalchenkov²,

Kovalets³

2022

MMS

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The previously developed system Povitrya allows the calculation of the atmospheric distribu-tion of 36 chemicals using the CALPUFF atmospheric dispersion model. In this paper, after the literature review and according to the requirements of the CALPUFF model, the values of the parameters for the calculation of dry and wet depositions of pollutants in the Povitrya system have been defined. Based on the analysis of the model parameters, the parameters that depend on the type of substance have been identified. For pollutants that spread in the form of aerosols, only one parameter – the scavenging coefficient included in the formula for the calculation of wet deposition – depends on the type of substance. Other deposition parameters for aerosols are a function of the characteristics of the particle size distribution, so they are not considered in this paper. The scavenging coefficient is specified for all types of chemicals – aerosols and gas-es modeled by the Povitrya system depending on the solubility of the substance (for gases) or miscibility (for aerosols). For gases, several other parameters in deposition calculation formu-las also depend on the type of substance, namely: molecular diffusivity, solubility enhancement factor, reactivity, mesophyll resistance, and Henry’s law. The values of the corresponding pa-rameters are set for 17 types of gaseous pollutants. To determine Henry’s law constant, there have been established correspondences between the definitions of this parameter in the litera-ture and the CALPUFF model. For mesophyll resistance, an interpolation formula is proposed to calculate this parameter as a function of solubility. The least data was found for reactivity and solubility enhancement coefficient. Therefore, with some exceptions, the values of the rele-vant parameters are set the same for all substances. A more detailed definition of these parame-ters requires a separate study.

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«Povitrya» Web-Based Software System for Operational Forecasting Atmospheric Pollution after Manmade Accidents in Ukraine

Cited by 5 publications

References 2 publications

The use of environmental decision support systems for modeling of atmospheric pollution following the chemical accidents

The use of environmental decision support systems for modeling of atmospheric pollution following the chemical accidents

Ensuring the functioning of the system for forecasting air pollution in the cloud infrastructure by automating the creation of virtual machines

Determination of the parameters for the calculation of dry and wet deposition of chemicals in the Povitrya system

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