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COMPUTATION OF WATER DEFICIT AND ARIDITY INDEX FOR THE PURVANCHAL
Authors: MANENDRA PRATAP VERMA
Number of views: 532
The crop water requirement defers the quantity of water needed to meet the water losses through
evapo-transpiration, potential evapo-transpiration, disease free under non-restricting soil conditions. The basic requirement
of water is function of the soil moisture deficits as influenced by evapo-transpiration and soil and plant characteristics.
Keeping this in view an experiment has been conducted to estimate the evapo-transpiration, potential evaporation and
aridity index for the region of Faizabad distt. of Uttar Pradesh. Due to uneven and inadequate distribution pattern of rainfall
in district, there is a need to computing the water deficit for planning of supplemental irrigation through which frequent
failure of crops can be controlled, along-with to increase the water use efficiency under limited resources. The climatic
data of 10 years (i.e. from 1999-2009) were recorded and analyzed by Thornthwait (1948) method to compute ets the water
defit. On the basis of data analyzed the result revealed that the average potential evapo-transpiration, evapo-transpiration,
water deficit and aridity index were found to be 1572.60 mm, 24.74 mm, 8.08 cm, and 0.82 respectively