Presenter: Dr. Huaming Yao
Co-author(s): Dr. Zhengyang Tang
Organisation: China Yangtze Power Company
Sub-theme
5. Establishing Sustainable Water Infrastructures
Topic
5-5. Joint operation and regulation of water projects
Body
The six giant reservoirs including Three Gorges in the upper Yangtze river form the largest reservoir system in the world. These reservoirs provide flood and drought protection, energy generation, navigation, ecological and environment protection for the basin. Due to large uncertainties of inputs and conflicts among the competing objectives, the management of the system is quite difficult and faces big challenges. This paper describes the framework of the so-called Three Gorges Decision Support Systems (TGDSS) and its application in the daily operation of the six reservoirs. The TGDSS consist of four major components, data acquisition, meteorological and hydrological forecasting, multi-objective decisions, and system integration platform. The data acquisition system receiving and processing real-time data from remote sense and more than 2000 ground station within 10 minutes, then feeds the data into the hydrological forecasting models to generate long-, mid-, short-, and real-time inflow predictions. Using the forecasting information, the decision models can generate the best policy to optimize the system benefit while meeting for constraints. The newly upgraded TGDSS platform has been operated for three years. TGDSS consistently provided well balanced operation policy for all weather conditions in terms of increased energy generation, mitigated damage of floods and droughts. Under the guidance of TGDSS, the system effectively decreased the downstream peak flow during the series floods in year 2020. It mitigated the flood damage and convert the excessive water into energy generation. The Three Gorges hydropower plant set a world record for annual energy generation; During the extreme dry year in 2022, the system was able to supply enough water for agriculture, navigation, and ecological requirement. The TGDSS plays a key role in the management for the giant reservoir system in the upper Yangtze river. The TGDSS platform adopts the state-of-art-information technology. Its easy-to-use interface design and display template of model outputs also provides protype for the similar solutions. The is paper will discuss the functionalities, modeling methods, application, and system integration technologies of TGDSS in detail.