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Kerala - Thiruvananthapuram Printer Friendly Page   Send this Article to a Friend

District sitting pretty with excess rainfall

By Our Special Correspondent

THIRUVANANTHAPURAM, SEPT. 15. The State capital district received excess rainfall under the influence of a depression in the Bay of Bengal, near Kolkata, during the past week, with 7.21 cm of rain being received as against a normal of 6.1 cm, according to the Met authorities here.

The district had received 155 per cent excess rainfall during the six-day period starting from September 2 as well. If the rainfall received since June 1 is taken into consideration, rainfall has been normal in the district so far, while there is a deficit of 22 per cent State-wide.

The following is the break up of the percentage of deficit in the 14 districts during the period from June 1 till date: Alappuzha: 26; Kannur 18; Ernakulam 27; Idukki four; Kasargode 31; Kollam 22; Kottayam 33; Kozhikode 28; Malappuram 24; Palakkad 15; Pathanamthitta 22; Thiruvananthapuram seven; Thrissur 24; and Wayanad 35. In meteorological terms, a fluctuation of plus or minus 19 is considered normal.

North East monsoon

The withdrawal of the South West monsoon starts from the first week of September, which is a transition month, and leads to the North East monsoon, or `thulavarsham', in October. Although the South West monsoon period is from June to September, 65 to 70 per cent of the rainfall occurs in June and July.

According to the former Met Director, R. Lakshminarayanan, most of the stations in Kerala get normal rainfall of about 20 to 30 cm in September. The rainfall decreases from the coast to the interior except over the high ranges of Idukki district, where it is about 40 cm.

This is mainly because of the thunderstorms, which the high ranges experience in September. The rainfall in September, 1988, had been excellent, with Aluva, Kochi airport, Alappuzha, Alathur and Perumbavoor reporting an all-time record rainfall of 72 cm, 68 cm, 71 cm , 46 cm and 78 cm respectively. In contrast, rainfall was poor in September 1991, when the State received just 20 per cent of the normal rainfall. About 30 per cent of the rain-gauge stations in Kerala had recorded the lowest ever rainfall for September in 1991.

Better rainfall

Kerala received excellent rainfall in September, 1998, as in 1988. In September, 1998, Kodungalloor, Perumbavur and Kozha recorded the highest ever rainfall of 81 cm, 84 cm and 85 cm respectively. In fact, some of the stations received more September rainfall in 1988 and 1998 that what they received in the peak monsoon months of June and July, Mr. Lakshminarayanan points out.

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