R Chorley 
Water, Earth, and Man [PDF ebook] 
A Synthesis of Hydrology, Geomorphology, and Socio-Economic Geography

First published in 1969, Water, Earth, and Man, was written to demonstrate the advantages of adopting a unified view of the earth and social sciences. The book considers the connection between an understanding of physical environments and an understanding of social environments. It explores the hydrologic cycle and highlights the significance of the relationship between natural environments and the activities of humankind, drawing together physical and human geography to produce a highly detailed study.