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Assessment of meteorological drought using Standard Precipitation Index model (SPI) in Herat, Afghanistan Alkozay, Arif
International Journal of Multidisciplinary Approach Research and Science Том 2 № 01 (2024): International Journal of Multidisciplinary Approach Research and Science
Publisher : PT. Riset Press International

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59653/ijmars.v2i01.380

Abstract

Assessing drought is a crucial component of effective drought risk management, stemming from diminished precipitation relative to the historical average, which subsequently impacts soil moisture and water reservoirs. The standard precipitation index (SPI) is commonly used to capture temporal and spatial variations. This research aims to evaluate the intensity, frequency, and duration of meteorological drought using SPI with time scales of 1, 3, 6, and 12 months in Herat Province, Afghanistan. The study encompasses 6 gauging stations with a 43-year record period in the region. The results show that with an increase in the time scale, the duration and frequency of drought increase. Additionally, the study reveals that the common extreme drought year for all stations was the year 2001, but the most extreme occurred in the year 2009 with an intensity two times greater than that of the year 2001. Due to the discrepancy of drought occurrence in each station, the findings suggest that for better drought management in the country, it is essential to analyze droughts in each local location. Over the past 43 years, the Cheldkhtaran station experienced the highest proportion of time in drought, accounting for 28.5%. Similarly, the Khosh Rabat station experienced droughts for 26.4%, the Nazdik-i-Herat station for 27.7%, the Pul-i-Hashemi station for 23.6%, and the Rabat-i-Akhund station for 26.9% of their respective time in the past 43 year.
A Comparative Assessment of Uncrushed-River Concrete Mix of Hari-River, and Kamar-Kalaq: the Two Widely Used Concrete Mix in Herat, Afghanistan Alkozay, Arif; Amanollah Faqiri; Noman Moheb; Khalid Ahmad Ahmadi; Sayed Naqibullah Sadat; Mohammad Yaser Saddeqi; Ahmad Fawad Jamshidi; Mir Mohammad rateb Sayedi; Safiullah Mohammadi
International Journal of Integrated Science and Technology Vol. 2 No. 9 (2024): September 2024
Publisher : MultiTech Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59890/ijist.v2i9.2036

Abstract

Concrete, as a cornerstone of modern construction, heavily relies on the quality of its constituent materials, particularly aggregates. This study delves into a comparative analysis of aggregates sourced from two widely utilized riverbed regions, namely Hari-River and Kamar-Kalaq, situated within Herat province, Afghanistan. Given that over 90% of concrete in Herat province is sourced from these two riverbeds, the findings of this study carry immense significance. The research meticulously examines key parameters, including clay content, gradation, aggregate shape, and compressive strength, to determine the optimal choice for concrete production. Methodologically, samples were acquired following ASTM standards, and rigorous testing procedures were conducted, encompassing clay particle analysis, sieve analysis, and strength testing. The results reveal significant disparities between the two regions, with Hari-River demonstrating superior characteristics across various metrics. Particularly noteworthy is Hari-River's lower clay content, superior gradation, and higher compressive strength compared to Kamar-Kalaq.
Evaluating the Seismic Resilience of Newly Constructed Concrete Building in Zinda Jan District After the Devastating October 2023 Earthquake in Herat, Afghanistan Alkozay, Arif; Rahimullah Stankzai; Amanollah Faqiri
International Journal of Integrated Science and Technology Vol. 2 No. 6 (2024): June 2024
Publisher : MultiTech Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59890/ijist.v2i6.2037

Abstract

This study aims to evaluate the impact of the October 2023 earthquake on the Zinda Jan district, focusing on the structural integrity of more than 2000 newly constructed buildings situated near fault lines. The specific objective is to identify any vulnerabilities in the design of these structures. Advanced computer analyses, including Linear and Non-linear (Push-over analysis) assessments using Etabs software, were employed to investigate the structural performance of the buildings. The analysis revealed significant insights into the structural integrity of the new constructions. It was observed that certain central columns exhibited inadequate strength, thereby posing a considerable risk of failure during seismic events. This vulnerability primarily stems from a disparity in strength between columns and beams, with the latter being stronger. This research contributes to the field by emphasizing the critical role of meticulous design and analysis in safeguarding buildings located in earthquake-prone regions.