ACADEMIA Letters Co-evolutionary Dynamics of Human Behaviour and Water Resource Systems Performance: A Socio-Hydrological Framework Nura Jafar Shanono Abstract Previously, water management task involves predicting future challenges due to hydrological uncertainties and physical constraints and propose alternative solutions without incorporating the impact of human behaviour. The co-evolutionary dynamics due to interactions and feed- backs between water resource systems (WRS) performance and human behaviour are still not well-understood and documented. Conventional reservoir yield analysis, for example, entails assessing the system’s yield potential under hydrological and physical constraints for a given operating rule and reliability of supply. Such traditional methods of yield analysis can fail to assess the actual dynamics of the WRS, as the causes and impacts of changing human be- haviour are not explicitly incorporated which might lead to imprudent decisions. This brief paper proposed a socio-hydrological framework for the co-evolution of WRS performance and human behaviour using four-state variables (hydrological state, management actions, users’ wellbeing and compliance behaviour). The main aim was to guide future socio-hydrologists to study, model and assess the impact of human behaviour on WRS performance. Keywords: Co-evolution,Human behaviour, Water resource systems, Socio-hydrology Academia Letters, June 2021 Corresponding Author: Nura Jafar Shanono, njshanono.age@buk.edu.ng Citation: Shanono, N.J. (2021). Co-evolutionary Dynamics of Human Behaviour and Water Resource Systems Performance: A Socio-Hydrological Framework. Academia Letters, Article 1191. https://doi.org/10.20935/AL1191. 1 ©2021 by the author — Open Access — Distributed under CC BY 4.0