Hydrology and Irrigation Engineering 10CV55 Dept of Civil Engineering, SJBIT Page 1 VTU-QUESTION PAPERSUNIT 1:INTRODUCTION & PRECIPITATION 1.Define precipitation. What is cyclonic precipitation? Distinguish between cold front and warm front (July 2013, Dec2013, July 2014, Dec 2014, July 2015) 2.Differentiate between recording and non - recording type of rain gauges (Dec2013,July 2014) 3.With a neat sketch, explain the working of a self recording rain gauge.(Dec2013, July 2014, Jan 2015) 4.Define hydrology. With a neat sketch, explain the Horton's qualitative representation of the hydrologic cycle. (Jan 2013, Dec 2013, July 2014, Jan 2015) 5.Define precipitation. Explain different forms of precipitation. (Dec 2014, June 2015 ) 6.Critically compare recording rain gauge (self) with non recording type rain gauge(July 2013, June 2014) 7.Briefly explain optimum number of rain gauge stations in a catchment.(Jan 2013,July 2013) 8.Explain the methods for the estimation of missing precipitation record(Dec2013, june2014) 9.During a month, a rain gauge went out of order while the other four gauges in the basin reported rainfalls of 110, 90, 120 and 115mm. If the normal annual rainfall for these four gauges are 115, 95, 125 and 120mm respectively and the normal rainfall for the broken gauge is 98cm, estimate the monthly rainfall at the broken gauge.(Jan 2013,2014) 10.A Lake had a water surface elevation of 103.200m above datum at the beginning of certain month. In that month the lake reserved an average inflow of 6.0cumecs from surface runoff sources. In the same period outflow from the lake have an average value of 6.5 cumecs. Further in that month the lake received a rainfall of 145mm and evaporation from lake surface was estimated at 6.10 cm. Write the water budget equation for lake & calculate the water surface elevation of the lake at end of month. The average lake surface area may be taken as 5000 hectares. Assume that there is no contribution to or from ground water storage. .(Jan 2013,July2014, Jan 2015) 11.A small catchment area of 150hectare received a rainfall of 10.5cm in 90 min due to a storm at a the outlet of catchment draining the catchment was dry before the storm & experienced a runoff lasting for 10 hrs with average discharge of 1.5 m3/s the stream was dry again after runoff event. (Jan 2013,june2014, July 2015) a)What is amount of water which was not available to runoff due to combine effect of infiltration evaporation? b)What is the ratio of runoff to precipitation .
Hydrology and Irrigation Engineering 10CV55 Dept of Civil Engineering, SJBIT Page 2 UNIT 2: LOSSES FROM PRECIPITATION