Research and application of reservoir storage capacity curve reconstruction method using multi-source data integration

Abstract

[Objective] The storage capacity curve of a reservoir plays an important role in flood prevention and disaster mitigation. To address issues of limited data sources and the selection of calculation models for reconstructing reservoir storage capacity curves. [Methods] First, a remote sensing water area inversion method for reservoir storage capacity calculation was used to assess the rationality of the original storage capacity curve, providing a basis for analyzing storage variations. Then, based on the characteristics of the multi-source data, the differences between the contour volume method and the DEM method in volume calculation were analyzed, and a hybrid model for calculating storage capacity was established. [Results] Taking the Wujiazhuang Reservoir in Pingyi County, Linyi City, Shandong Province, as a case study, the storage variations calculated using the multi-source data hybrid model showed a reduction of 163 600 m³ in dead storage, a reduction of 145 100 m³ in active storage, and a reduction of 270 500 m³ in total storage. An in-depth analysis of the reasons for the storage reduction was conducted, considering the topography, time-series remote sensing images, and engineering development in the reservoir area. The reliability of this method in calculating storage capacity was verified. [Conclusion] The findings show that the hybrid multi-source data curve reconstruction method overcomes the challenge of discrepancies between surface and sub-surface data, addresses the limitations of traditional method in handling complex topography, and provides a valuable calculation paradigm. It effectively improves the accuracy and efficiency of storage capacity curve reconstruction, provides a scientific basis for flood prevention and disaster mitigation in reservoirs, and enhances the efficiency and safety of reservoir management.

Keywords

multi-source data / rationality assessment / reservoir storage capacity curve / flood control and disaster mitigation / contour volume method / water conservancy engineering