The document discusses different types of scientific knowledge and approaches to water management. It describes modeling science as aiming to predict through modeling and make causal explanations to influence society. Interpretive science seeks subjective meanings and understanding through interpretation. Activist science aims to create social transformation through participatory research to address injustices. It notes that constructed knowledge will always overwhelm observed science, and politics is needed to deal with the ambiguity and uncertainty in managing complex social issues like water.