H.N. Singh

H.N. Singh
On variability of hydrological wet season, seasonal rainfall and rainwater potential of river basins in India (using rainfall data over 1813-2006) - An IITM technical paper
The paper discusses climatological and fluctuation features of important parameters of the Hydrological Wet Season for the eleven major and thirty six minor river basins. Posted on 10 May, 2010 09:12 PM

The paper discuses climatological and fluctuation features of important parameters of the Hydrological Wet Season (HWS), viz. starting and ending dates, duration, seasonal rainfall/rainwater and surplus rainfall/rainwater potential individually for the eleven major and thirty six minor river basins, the West Coast Drainage System (WCDS) and the rest of the country. It is based on reliable monthly rainfall data from a well spread network of three hundred and sixteen rain gauge stations from 1813 upto 2006.

The paper observes that the average period of the HWS is in close conformity with the southwest Monsoonal Rainy Season (MRS) over the basins in the Core Monsoon Rainfall Regime (CMRR). In the Mixed Monsoon Rainfall Regime (MMRR) covering south peninsula, northeast and extreme north, the HWS is of longer duration compared to the MRS due to extra-monsoonal rainfall over there. The mean starting date of the HWS is May 30, ending October 11 and the duration is 135 days for the entire country.

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