Solution or corrosion - This is when acidic water erodes rock. Flooding Floods can bring both advantages and disadvantages to an area. Floods can deposite rich, fertile alluvium on agricultural areas. Also, flood water can replenish irrigation channels. On the other hand floods can destroy food supplies, homes and transport infrastructures.
Rain water reaches rivers faster.
Flooding becomes more likely. Rain water reaches rivers faster and can cause flooding. They cause large scale problems in the low lying country of Bangladesh. There are both human and natural causes of flooding in this area. Human Causes Deforestation - Population increase in Nepal means there is a greater demand for food, fuel and building materials.