6 months ago
2
A survey by the Kozhikode-based Centre for Water Resources Development and Management (CWRDM) has recovered north-to-south variations successful the geographical organisation of seasonal and yearly rainfall crossed Kerala.
According to the survey titled ‘Kerala Water Resources Assessment 2024: Rainfall, Rivers, Groundwater, and Wetlands 2024’, bluish Kerala, comprising Kasaragod, Kannur, Wayanad, Kozhikode, and Malappuram districts, receives the bulk of its rainfall from the south-west monsoon. It contributes astir 71% of the full yearly rainfall, portion the north-east monsoon contributes lone astir 14%. Central Kerala, including Palakkad, Thrissur, Ernakulam, Idukki, and Kottayam, besides receives a ascendant stock of rainfall from the south-west monsoon, averaging astir 61%, with the north-east monsoon accounting for astir 17%.
In contrast, the confederate districts of Thiruvananthapuram, Kollam, Alappuzha, and Pathanamthitta person somewhat little contributions from the south-west monsoon, astir 46%, portion the north-east monsoon contributes a higher proportionality of astir 22%, indicating a much balanced seasonal rainfall pattern.
Meanwhile, an investigation of the rainfall patterns successful Kerala betwixt 1970 and 2024 showed that June exhibited a pronounced decreasing inclination successful respective districts, including Pathanamthitta, Ernakulam, Kottayam, and Kannur, indicating important reductions successful aboriginal monsoon rainfall. July continues this pattern, with important decreases successful Kollam, Idukki, and Ernakulam. August rainfall is comparatively unchangeable crossed astir districts, though flimsy increases are observed successful Malappuram and Thrissur, portion September shows a important expanding inclination successful respective bluish districts, specified arsenic Malappuram, Wayanad, Kannur, and Kasaragod, reflecting a strengthening of rainfall during the highest monsoon season. In March, flimsy increases are noted successful Alappuzha, Kottayam, Idukki, and Wayanad, suggesting aboriginal pre-monsoon rainfall variability.
A seasonal investigation indicates mixed trends during the south-west monsoon, with decreasing rainfall successful Kollam, Idukki, and Ernakulam, and flimsy increases successful bluish districts specified arsenic Kasaragod, Wayanad, and Kannur. During the north-east monsoon, coastal districts, including Malappuram and Kasaragod, grounds decreasing trends, whereas Kannur shows an expanding trend, highlighting spatial variability.
District-specific observations uncover that confederate districts, including Thiruvananthapuram, Kollam, and Alappuzha, mostly acquisition unchangeable oregon somewhat decreasing rainfall during aboriginal monsoon months. Central districts specified arsenic Kottayam, Pathanamthitta, Idukki, Ernakulam, Thrissur, and Palakkad grounds mixed trends with immoderate increases during pre-monsoon months and decreases successful aboriginal south-western monsoon months. Northern districts, including Malappuram, Kozhikode, Kannur, Kasaragod, and Wayanad, mostly amusement expanding rainfall trends during south-western monsoon and post-monsoon months, suggesting intensified rainfall there.
