Abstract
Surface runoff is a major water resource component and its spatial and temporal variations significantly impact on regional socio-economic development. In this study, changes to surface runoff in Jiangsu Province, China, were simulated using the variable infiltration capacity (VIC) model for the period 2011–2040, using input data from five Coupled Model Intercomparison Project Phase 5 (CMIP5) climate models and three different Representative Concentration Pathway (RCP) scenarios. In general, annual mean precipitation under the five models and three scenarios showed a fluctuating upward trend, while annual mean temperatures were projected to increase by up to 1.34 °C, as compared with the reference period (1970–1999). Monthly mean runoff depths were generally predicted to increase, with the most significant increases occurring in December. Increasing runoff depths were highest under the RCP8.5 emission scenario and lowest under RCP4.5. The results of this study provide an important reference for policymakers planning for the future water resources in Jiangsu Province. Furthermore, we conducted a case study with the VIC model and it showed high consistency with gauges and provides a new reference for the studies of other plain regions.
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