List of top Soil and Water Conservation Engineering Questions

A mild steel flange-mounted single shear pin (Ultimate shear strength = 42 MPa) is used in a flange. The perpendicular distance between the axis of driving shaft and the shear pin axis is 100 mm. If the speed of the driving shaft is 300 rpm, the maximum power the shaft could transmit in kW before the failure of the pin is _____. \textit{[Round off to two decimal places.]}

While carrying out a traverse survey ABCDA' using a theodolite with the originating station A, the departures and latitudes of the lines are shown in the figure. Due to observational errors, the computed closing point A' does not coincide with A. For this survey, the 'closing error' in m is:

The approximate relationship between Sediment Delivery Ratio (SDR) and drainage area (A) shows that SDR varies
While assessing the intensity of agricultural drought, a negative value of aridity index indicates that the area is classified as
The hydrologic reservoir routing methods use
A small watershed receives 90 mm of rainfall in a day. If the initial abstraction is considered as 25% of the potential maximum retention of soil, and the land use changes from forest (with \(S = 136\) mm) to cultivated land (with \(S = 64\) mm), the change in daily runoff volume in percent is \(\underline{\hspace{1cm}}\) (round off to one decimal place).
Water is discharged from a tank through a rectangular orifice of width 1.5 m and height 1.2 m. The water level in the tank is 3.5 m above the top edge of the orifice. The coefficient of discharge is 0.62. Find the discharge through the orifice in m³·s⁻¹.
A windbreak of 15 m height and 200 m length is established to protect land from wind erosion. The minimum wind velocity at the height of 15 m above the ground required to move the most erodible soil fraction is 9.6 m/s. The wind direction deviates by 20° from the line perpendicular to the windbreak. The area protected by the windbreak is \(\underline{\hspace{2cm}}\) ha.
The shape of the Instantaneous Unit Hydrograph (IUH) of a catchment is an isosceles triangle with a peak of 60 m\(^3\)s\(^{-1}\) and time to peak of 3 h. If the constant baseflow is 7.5 m\(^3\)s\(^{-1}\), the peak of the 3-h Unit Hydrograph (UH) in m\(^3\)s\(^{-1}\) is
The dry density (in g·cm\(^{-3}\)) and porosity (in per cent) of the soil sample, respectively, are:
It is proposed to develop bench terraces in an area having land slope of 10%. If the vertical interval between the bench terraces is 2.5 m and the batter slope is 100%, working width (in m) and the area lost for cultivation (in percent), respectively will be
A shear annulus with inner and outer diameters of 240 mm and 300 mm is used to measure soil shear strength. The torque at failure is 50 N·m. Shear strength of soil in kPa is (Take $\pi = 3.14$)
A cohesionless soil forms a natural infinite slope at \(25^\circ\). If the effective friction angle is \(30^\circ\), determine the factor of safety (round off to 2 decimals).