Complex sentence: Nangal is situated on the foothills of Shivalik hills and spread over both sides of river Sutlej which forms a lake behind the Nangal Dam.It is a flourishing township at the foot of the Shiwalik Hills, a chain of Himalayas.
Split into simpler sentences: Nangal is situated on the foothills of Shivalik hills and spread over both sides of river Sutlej which forms a lake behind the Nangal Dam. The township is at the foot of the Shiwalik Hills, a chain of Himalayas.