what is resource drainage?

Dear Arpita, there are numerous instances where the term 'resource drainage' has its implications. It would be difficult for us to explain this term without knowing the context in which you are concerned about. Please try to be more explicit, so that we can provide you with better help. However, what all I can infer from this term is that the resources are getting drained. If it is related to the human capital (techncially termed as brain drain), then resource drainage implies loss of quality human capital from the developing to the developed countries in the pursuit of better economic opportunities. Do get back to us and try to be little more specific.