CASE STUDY OF RAIN PARAMETERS IN HANOI BY THE DROP SIZE MEASUREMENT EQUIPMENT THAT BASED ON OPTICAL PRINCIPLE
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Measuring; Data processing; Optoelectronics; Meteorological precipitation; The disdrometers; Soil erosion.Abstract
Research rain parameters such as drop size (diameter) D, rainfall amount R, rainfall intensity I, rainfall kinetic energy (KE) is great significance for many applications in wave propagation, erosion, meteorological, atmospheric physic research, troposphere structure measurement,… The paper presents some results on rainfall characteristics in Hanoi during the observation period when using drop size measurement equipment that based on optical principle have been improved and manufactured in the project [8]. Regarding the particle size distribution, the relationship between the frequency of occurrence and the rain particle size follows the Polynome function of degree 6 with the coefficient of determination R2 > 0.9. Relationship KEtime(I) matches a linear function with the coefficient of determination R2 > 0.8.
References
[1]. Ali Tokay., et al, “Comparison of Raindrop Size Distribution Measurements by Collocated Disdrometers”. Journal of Atmospheric and Oceanic Technology. Vol.30 (2013). p.1672-1689.
[2]. F. Y. Testik và M. K. Rahman, “High-Speed Optical Disdrometer for Rainfall Microphysical Observations”. Journal of Atmospheric and Oceanic Technology. Vol.33 (2015). p.231-242.
[3]. D.V. Kiesewetter, V.1. Malyugin, M.Y. Litvak, “Method for the Drops Velocity Measurement”. A.c. N2177091 1, USSR, Bul. Izobret (in Russian)., 39, (1992).
[4]. Lai Thi Van Quyen, Nguyen Manh Thang, Nguyen Hong Vu, Nguyen The Truyen, V.I. Malyugin, D.V. Kiesewetter, “The Optical Disdrometer”. Advances in Wireless and Optical Communication. (RTUWO), International Conference, Riga, Latvia. (2017).
[5]. Lai Thi Van Quyen, Nguyen Manh Thang, Nguyen Hong Vu, Nguyen The Truyen, Victor Ivanovich Malyugin, Dmitry Vladimirovich Kiesewetter, “Device for Measuring Parameters of the Meteorological Precipitation”. Proc. XXVI International Scientific Conference Electronics - ET2017. (2017).
[6]. D.V. Kiesewetter, V.I. Malyugin, “Simultaneous Measurements of Velocity and Size of Moving Particles”. J. Tech. Phys., Vol.79, No 2, (2009), pp. 90-95.
[7]. D.V. Kiesewetter, V.I. Malyugin, “Simultaneous Measurements of Velocity and Size of Moving Particles”. Proc Lasers for Measurements and Information Transfer 2003, SPIE, Vol.5381, (2004), p. 200-209.
[8]. Lai Thị Vân Quyên., Nguyễn Hồng Vũ., Nguyễn Thế Truyện, “Thiết kế, chế tạo thiết bị đo kích thước hạt mưa bằng quang học”. Tạp chí Nghiên cứu khoa học và Công nghệ quân sự, (2020), Vol.66. p.105-116
[9]. Mahadi Lawan Yakubu, Zulkifli Yusop & Mohamad Ali Fulazzaky. “The Influence of Rain Intensity on Raindrop Diameter and The Kinetics of Tropical Rainfall: case study of Skudai, Malaysia”. Hydrological Sciences Journal, (2016), 61:5, 944-951, DOI: 10.1080/02626667.2014.934251
[10]. Lisbeth Lolk Johannsen, Nives Zambon, Peter Strauss, Tomas Dostal, Martin Neumann, David Zumr, Thomas A. Cochrane, Günter Blöschl & Andreas Klik. “Comparison of Three Types of Laser Optical Disdrometers under Natural Rainfall Conditions”. Hydrological Sciences Journal, (2020), 65:4, 524-535, DOI: 10.1080/02626667.2019.1709641
[11]. Seung Sook Shin, Sang Deog Park, and Byoung Koo Choi. “Universal Power Law for Relationship between Rainfall Kinetic Energy and Rainfall Intensity”. Hindawi Publishing Corporation Advances in Meteorology, (2016), Article ID 2494681, 11 pages
[12]. Derege Tsegaye Meshesha, Atsushi Tsunekawa, Mitsuru Tsubo, Nigussie Haregeweyn & Enyew Adgo. “Drop Size Distribution and Kinetic Energy Load of Rainfall Events in The Highlands of the Central Rift Valley, Ethiopia”. Hydrological Sciences Journal, (2014), 59:12, 2203-2215, DOI: 10.1080/02626667.2013.865030.
