Recent questions in Water Resources and Environmental Hydraulics

Consider a watershed and isohyets as shown in the figure. The average rainfall in the watershed is ___________ $\mathrm{mm}$ $\text{(an integer value)}$.

With reference to the gate shown in the figure, the gate will start opening automatically when the water level ' $h$ ' above the hinge is __________ $\mathrm{m}$ $\text{(...

In a cyclone separator of radius $25 \mathrm{~cm}$, a particle is travelling with a gas stream at velocity of $18 \mathrm{~m} / \mathrm{s}$. The ratio of centrifugal forc...

The kinematic viscosity of glycerin and kerosene are $1.2$ times and $0.95$ times of that of water, respectively. Glycerin and kerosene flow through two identical porous...

The critical depth in a $2 \mathrm{~m}$ wide rectangular channel carrying a discharge of $10 \mathrm{~m}^{3} / \mathrm{s}$ and taking value of acceleration due to gravity...

An S-hydrograph was prepared for a catchment of $240 \mathrm{~km}^2$ using 3-hour unit hydrograph $(1 \mathrm{~cm}$ rainfall excess). The equilibrium discharge for the S-...

River water containing two types of spherical suspended particles $\text{(clay particles, metal particles)}$ is retained in a sedimentation tank. The clay particles havin...

The following figure (not to the scale) shows a catchment $(\mathrm{Q}, \mathrm{S}, \mathrm{U}, \mathrm{T}, \mathrm{Q})$ and adjoining raingauge stations $\mathrm{P}, \ma...

A trapezoidal canal lined with cement concrete $(n=0.01)$ is designed to carry a discharge of $20 \mathrm{~m}^{3} / \mathrm{s}$ at a bed slope 1 in 400 . If the bed width...

A fully penetrating well is installed in a homogenous and isotropic confined aquifer. The aquifer has uniform thickness of $16 \mathrm{~m}$ and hydraulic conductivity of ...

In fluid statics, the line of action of the buoyant force always acts through the ___________.centre of gravity of any submerged bodycentroid of the volume of any floatin...

If $d$ is the depth of an aquifer through which water is flowing, then the relationship between permeability $K$ and transmissibility $\text{(also known as transmissivity...

Which of the following causes $\text{'Type-I'}$ settling in a sedimentation tank? AgglomerationCompression Force of gravityCharge neutralization

A water jet discharging from a $4 \mathrm{~cm}$ diameter orifice has a diameter of 3.5 $\mathrm{cm}$ at its vena contracta. The coefficient of velocity is defined as the ...

Two reservoirs are connected by a pipeline consisting of two pipes '$\text{A}$ ' and '$\text{B}$ ' in series. The two pipes are of same length and have the same Darcy fri...

In open channel flow, the specific energy is the total energy per unit weight of a liquid, where the component potential energy is measured from the bed of the channel as...

In a field test of a geological formation of permeable soil (porosity = $20 \%$ ), the hydraulic gradient was found to be $2 \%$. The actual seepage velocity of the flow ...

A $900 \mathrm{~mm}$ internal diameter sewer is laid at a slope of $0.004$ and has an actual flow of $0.15 \mathrm{~m}^3 / \mathrm{s}$. Assuming Manning's roughness coeff...

A $10$ million litres per day $\text{(MLD)}$ sewage treatment plant $\text{(STP)}$ is based on the Activated Sludge Process $\text{(ASP)}$. First, the sewage undergoes pr...