Wide variations are seen in the occurrence of rainfall and distribution in Coimbatore district. As such arithmetic mean may not represent the average rainfall. so Thiessen-weighted average and Isohyetal average of rainfall were worked out.. The arithmetic mean (826.70 mm) was the lowest and the Thiessen weighted average value was increased by about 100 mm. The isohyetal average showed a very high value (1348.05 mm): These variations were due to the non-uniformity in the dis- tribution of rain gauges and also because of steep precipitation gradients. Isobyetal mean which seems to be more representative, should be utilised for hydrological analysis such as surface water, recharge of ground water etc.
For MASU related issues :
PUBLISHER
SECRETARY
Madras
Agricultural Students Union
Tamil Nadu Agricultural University
Coimbatore - 641 003
Tamil Nadu, India.
For MAJ related issues :
EDITOR-IN-CHIEF
Madras
Agricultural Students Union
Tamil Nadu Agricultural University
Coimbatore - 641 003
Tamil Nadu, India.
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