Borewell water level drop in Bangalore, Karnataka - Able to pump water only for 3-4 mins.Does the bore need flushing?

Hi, 

We had drilled borewell in 2003. I don't have the complete information regarding the borewell. Couple of years back, there was big hole around the borewell and mud entered into the borewell. From then on, water level started dropping. I have an immersible motor to pump water from borewell to the sump. Now there are 2 or more bores drilled by other house owners. Now I see a complete drop in water level. On powering the pump, there will be water for 3-4 min after which there will be no water. If I try after 3-4 hours I will get water for 3-4min. 

1. Is this behaviour due to the fact that the water level gone down, or,

2. Does the bore need flushing?

Can anyone visit my house and advice on resolving this issue. 

Location: Abbiah Reddy Layout

Kaggadasapura, CV Raman Nagar Post

Bangalore - 560093

Thanks and regards

Aman

9945124750

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