Determination of Maximum Storage and Drainage Coefficient from Consecutive Days Maximum Rainfall at Different Locations in India

Abstract

Knowledge about the maximum possible storage of rainwater in the field and its safe disposal is very important to save crops from the adverse impact of excess rainfall. Keeping this in view, daily rainfall data of 30 to 35 years as per availability was analyzed at four centres of All India Coordinated Research Project on Water Management i.e. (i) Samastipur (ii) Ludhiana, (iii) Hisar, and (iv) Almora. In the design of agricultural structures, generally, 10 years return period is considered, so the point, where tangent drawn on the curves of 10 years return period crosses the Y-axis, gives maximum possible storage (recommended bund height) in rice fields. Maximum possible storage (bund height) corresponding to 10 years return period was found as 25 cm, 15 cm, 13 cm, and 27.5 cm and corresponding drainage coefficient as 26.3 mm/day, 6.8 mm/day, 8.4 mm/day and 24.8 mm/day for Samastipur, Ludhiana, Hisar and Almora, respectively.