Weather and Water Level Monitoring System for Hydrometeorological Analysis in the Lake Toba Region

DOI

10.2991/978-94-6463-232-3_3How to use a DOI?

Keywords

Hydrometeorology; Lake Toba; Realtime; Weather

Abstract

Lake Toba is the largest volcanic lake in Southeast Asia that has a multi-sectoral role, both for the benefit of local communities and for national and even international interests. Lake Toba as a tourist destination where in 2020 the Toba Regency Central Statistics Agency recorded the number of passenger and freight ship visits on lake transportation reaching 7,809 visits. Lake Toba is also useful in the energy sector because there are 3 (three) Hydroelectric Power Plants (PLTA) in the Lake Toba area, namely Siruar Dam, Siguragura Dam and Tanga Dam. Fish farming using Floating Finger Cages (KJA) generates economic value for 12,300 workers. This sector contributes to the Gross Regional Domestic Product (GDP) of 32.28% in 2020. Therefore, the presence of weather information is important to support these sectors. With the hydrometeorological study of the Lake Toba area, it is hoped that it will support the preservation of Lake Toba in the spatial plan for the development of Lake Toba. To meet these needs, a weather monitoring system has been built in the Lake Toba area using components in the form of data loggers, sensors and support systems in the form of communication and power supply. The data obtained from January 2021 to August 2022 consists of data on rainfall, water level and wind direction and speed. Wind direction and speed data are used to support transportation activities, especially ship crossings that take place in the Lake Toba area. Rainfall and water level data were processed using the Spectral Analysis method to obtain the periodicity of weather parameters. The highest spectral peak for rainfall parameters was obtained in the period of 18.3 bases (183 days) or about 6 months. As for the water level parameter, the spectral peak occurred in a period of 4,379 h (163 days) or about 6 months. These results indicate that the weather and hydrological conditions at the location are dominated by the movement of the Intertropical Convergence Zone (ITCZ) to the north and south. The results of the analysis of wind direction and speed data show that the dominant wind direction is from the southeast with the highest recorded speed of 1–4 knots.

Copyright

© 2023 The Author(s)

Open Access

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TY  - CONF
AU  - Dyah P. Djenal
AU  - Santoso Soekirno
AU  - Prada Wellyantama
AU  - Aly Ilyas
AU  - Sugiarto
AU  - Maulana Putra
PY  - 2023
DA  - 2023/08/17
TI  - Weather and Water Level Monitoring System for Hydrometeorological Analysis in the Lake Toba Region
BT  - Proceedings of the 2nd International Conference on Science Education and Sciences 2022 (ICSES 2022)
PB  - Atlantis Press
SP  - 19
EP  - 29
SN  - 2352-541X
UR  - https://doi.org/10.2991/978-94-6463-232-3_3
DO  - 10.2991/978-94-6463-232-3_3
ID  - Djenal2023
ER  -