Mi Oya River
Mi Oya is a stream in the North-Western Province. Flows for about 108 km, it is listed the fifteenth-longest river in the country.
M i Oya or Mee Oya (Sinhala: මී ඔය) is a stream in the North-Western Province, Sri Lanka. Originates in the Galgamuwa-Maho area, it flows for 109 km before reaching the end at Puttalam (Arumugam, 1969; Vithanage, 1988). River Basin The Mi Oya River basin has a catchment area of about 1,516 km 2 (Koswaththa et al., 2024). The river's main tributary is Nanneriya Oya which contributes about 40% of the total runoff (Madumali & Manamperi, 2020). The annual precipitation volume and sea discharge volume are 1000 mm and 412 million m 3 , respectively (Wanasinghe et al., 2023). The annual rainfall of the major rain season of the area is about 1200 mm while in the minimum rain period about 840 mm (Madumali & Manamperi, 2020). Due to the intense weather conditions during the monsoon seasons, seasonal flooding severely affects the Mi Oya River basin annually (Wanasinghe et al., 2023). You may want to read this post: Rivers of Sri Lanka Reservoirs & Anicuts in the Mi Oya River Basin
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