Dr. John Zhu is Senior Hydrologist in the Water Availability Program in the Surface Water Division at the TWDB. He is responsible for assessing surface water availability for water resources planning and development in Texas, for compiling the reservoir evaporation datasets, drought mapping and water conditions reporting, and management of the TWDB reservoir database. He applies hydrological analysis and modeling using the Water Right Analysis Package (WRAP) water accounting model to compute reservoir firm yield under various scenarios (such as reservoir silting, future drought and water management strategies, etc.) within the Texas Water Availability Modeling (WAM) system. He also uses Conditional Reliability Modeling within WRAP to generate short-term reservoir storage forecasts. John holds a Ph.D. in Karst Hydrology from the Institute of Geology, Chinese Academy of Sciences, China, and M.Sc. and B. Eng. Degrees in Hydrogeology from Jilin University, China. He is a Texas Certified Professional Geologist (PG) and a Microsoft Certified Professional (MCP).