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Message: <blockquote data-quote="Dr.Sheldon_Suprakata" data-source="post: 31098174" data-attributes="member: 566147">කලින් predict කරපු විදිහට අතුරුගිරියේත් පහල area  වලට වතුර එනවා වගේ. මීට වඩා ගොඩක් වැඩි වෙන්නේ  නැති වෙයි  ගොඩක්  දුරට.<img src="https://i.postimg.cc/Mq86XrGb/image-2025-11-30-100406388.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="https://static.xx.fbcdn.net/images/emoji.php/v9/tbc/1/16/1f30a.png" alt="🌊" class="fr-fic fr-dii fr-draggable " style="" /> KADUWELA – What Will HappenKaduwela sits directly in the Kelani flood-spread corridor, especially the low ground between Biyagama, Kelanimulla, and Orugodawatta.<img src="https://static.xx.fbcdn.net/images/emoji.php/v9/t33/1/16/2705.png" alt="✅" class="fr-fic fr-dii fr-draggable " style="" /> Expected Flood DepthsKaduwela Town Lowlands:2–5 ft (0.6–1.5 m)Kelanimulla area:4–8 ft (1.2–2.5 m) (highest risk zone in Kaduwela)Athurugiriya Road lower bends:1–3 ft (0.3–0.9 m)Kaduwela Bridge / Highway underpass pockets:2–4 ft (0.6–1.2 m)<img src="https://static.xx.fbcdn.net/images/emoji.php/v9/t50/1/16/1f525.png" alt="🔥" class="fr-fic fr-dii fr-draggable " style="" /> Why Kaduwela will floodWater moving downstream from Pugoda → Hanwella → KaduwelaLow elevation (5–8 m in many parts)Backflow from canals + Kelani overflowHistorical flooding (2016/2021/2024) shows Kaduwela is a major “spread basin”<img src="https://static.xx.fbcdn.net/images/emoji.php/v9/tac/1/16/1f4cc.png" alt="📌" class="fr-fic fr-dii fr-draggable " style="" /> TimingFlood levels may increase for the next 6–12 hours, because Mapitigama is still rising.<img src="https://static.xx.fbcdn.net/images/emoji.php/v9/td0/1/16/1f327.png" alt="🌧" class="fr-fic fr-dii fr-draggable " style="" /> MALABE – What Will HappenMalabe is higher in elevation compared to Kaduwela, but drainage connects downward into Kolonnawa and Kaduwela basins.<img src="https://static.xx.fbcdn.net/images/emoji.php/v9/t33/1/16/2705.png" alt="✅" class="fr-fic fr-dii fr-draggable " style="" /> Expected Flood DepthsMost of Malabe (higher ground):0–1 ft (0–0.3 m) — surface water onlyNear waterways / low pocket areas:1–2 ft (0.3–0.6 m)Malabe Town (centre):Mostly safe — may see minor road floodingArangala, Chandrika Kumaratunga Mawatha low spots:1–3 ft possible if drainage chokesKoswatta → Rajagiriya corridor:Flooding likely because water pushes towards Kolonnawa LP basin<img src="https://static.xx.fbcdn.net/images/emoji.php/v9/tdc/1/16/26a0.png" alt="⚠" class="fr-fic fr-dii fr-draggable " style="" /> Important:Malabe does not flood from Kelani directly, but: Drainage lines push water downhill into Kolonnawa BasinWhen Kolonnawa floods heavily, water backs up toward Rajagiriya → Malabe corridorSo Malabe’s issue is drainage backflow, not river overflow.</blockquote>

Verification: Hata thunen beduwama keeyada? (60 bedeema thuna)

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