Control Panel Components

How deep is the river?

Is the water clear or turbid?

Water temperature?

Flow rate?

What does the water taste like?

In what way these parameters will be used?

Regs,

To determine, "What all components are necessary for control panel with induction motor to show water levels in river, and gate position of a barrage".

In other words, your question is nonsense.

You define nothing of consequence to the question.

Maybe a translator is needed, or maybe you should direct your question toward a local person, who has knowledge of the language and the river.

There are several different ways to go about this. Choosing the best depends on exactly what you want to do, which hasn't been well described yet. For instance, are you trying to control the water level upstream or downstream of the gate?

In any event, you need to measure a water level, which can be done by radar or sonic devices, a pressure transducer, or a float with linear or rotary position indicator.

For the motor, you need a reversing starter. You may also need or want a disconnect switch, and fuses or circuit breaker.

You may or may not need to detect the gate position. This could be done with a rotary encoder on the motor driving the gate, or with a vector drive.

These are only a few of the possibilities.

A weir doesn't need a control panel.

ANONS

What's required for the control panel?

Lots of gubbins with bits of wire between them.