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National Hydraulic Research Institute of Malaysia, Ministry of Natural Resources and Environment (NRE) Future Rainfall • In annual rainfall: 10% increase for Kelantan, Terengganu and Pahang 5% decrease for Selangor and Johor • More droughts ie dry years (from modelling output: 2028, 2029, 2034, 2042 and 2044) • A increase up to 51% in maximum monthly rainfall over the North East Coastal region • A decrease in minimum monthly rainfall over Selangor (- 32%) and Johor (-61% ) • More extreme hydrological conditions may be expected
National Hydraulic Research Institute of Malaysia, Ministry of Natural Resources and Environment (NRE) Summary of Monthly Flows River Klang Selangor Dungun Kelantan Pahang Perak Muda Johor Maximum Monthly Flows (cms) Mean Monthly Flows (cms) Minimum Monthly Flows (cms) Historical 31.2 107.9 398.4 1535.1 1697.4 523.7 307.4 82.7 Future 45.8 108.5 569.5 1950.7 2176.6 578.2 340.0 94.0 Diff. +14.6 +0.6 +171.1 +415.6 +479.2 +54.5 +32.6 +11.3 (%) +46.8 +0.6 +42.9 +27.1 +28.2 +10.4 +10.6 +13.7 Historical 14.4 40.7 93.4 535.9 669.6 286.4 105.6 32.7 Future 13.3 37.5 98.3 601.7 718.1 299.7 104.0 31.8 Diff. -1.1 -3.2 +4.9 +65.8 +48.5 +13.3 -1.6 -0.9 (%) -7.6 -7.9 +5.2 +12.3 +7.2 +4.6 -1.5 -2.8 Historical 2.6 7.1 13.1 158.4 156.3 183.6 25.3 9.8 Future 3.5 0.5 10.8 125.8 122.7 139.2 5.3 6.8 Diff. +0.9 -6.6 -2.3 -32.6 -33.6 -44.4 -20 -3 (%) +34.6 -93.0 -17.6 -20.6 -21.5 -24.2 -79.1 -30.6
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