Nazir Ahmad2024-06-252024-06-251994https://digitallibrary.punjab.gov.pk//handle/123456789/129641357 PagesenModel studies on the effects of different forms of obstructions to the natural flow of streams and channels and their application to the design of canal falls and weirs:thesis submitted in fulfilment of the requirements for the degree of doctor of philosophy in the faculty of science of the university of the punjabThesis