Why river ganga does not dry during summer

The Ganges River, or river Ganga is known to be one of the largest rivers in the world which means that there is still a huge reserve of water. The summer may dry up the Ganges river and makes it low tide, but it will not totally dry up because the summer is followed by some rainy days which will make the Ganges river become high tide. Whenever there are downpours in the country, then the water level of the Ganges river will go up and the water will be replenished. 

The answer to the question is moraine

Answer they are produced by collision of tectonic plates;