JSSC JE CE IRRIGATION & HYDROLOGY QUIZ 1

The maximum depth of precipitation is given by the following equation:

PMP = 42.16D^0.475, where D is the duration of rainfall.

what are units of PMP an ‘D’ in this equation?

In a catchment there are five raingauge station which measured rainfalls of 5, 10, 15, 20 and 25 cm respectively. Assuming allowable error of 15% in measured of rainfalls, the number of additional raingauge will be –

Statement (I): Precipitation caused due to topographical parries is known as orographic precipitation.

Statement (II): Precipitation caused due to temperature variation is known as convective precipitation.

An Isohyte is line joining points having

Find missing rainfall of station ‘X’

Determine the optimum number of rain gauge stations in the catchment for an admissible error of 10% in the estimation of mean rainfall. The coefficient of variation of the rainfall for 4 rain gauge stations in the catchment is 30%.

Which of the following statements(s) is /are correct regarding recommendation of Indian standards institute regarding rain-gauges:

1) In plain regions, one rain gauge per 520 km² of the catchment is recommended

2) In hilly areas with heavy rainfall, one rain gauge per 200 km² of the catchment is recommended

3) Each rain gauge must be surrounded by an open fence area of minimum size 5.5 m × 5.5 m.

4) Each rain gauge must be installed at a distance of atleast 30 m from the nearest obstruction.

The normal annual rainfall at stations A, B and C are 140.5, 150.6 and 136.4 cm respectively. In 2012, station B was inoperative and station A and C recorded annual precipitation of 126.0 and 118.5 cm respectively. The annual rainfall at station Q in that year could be estimated as

Which of the following rain gauge is NOT a recording type rain gauge