融合多源数据重构库容曲线方法研究及应用

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

摘要

【目的】水库的库容曲线在发挥其防洪减灾功能中扮演着重要角色。针对重构库容曲线受限数据来源及计算模型的选择问题。【方法】首先，采用遥感水体面积反算库容法评价原始库容曲线的合理性，为分析库容变化提供基础；然后基于多源数据的特性，分析了等高线容积法与DEM法在库容计算中的差异，构建了计算库容的混合模型。【结果】以山东省临沂市平邑县吴家庄水库为例，利用多源数据混合模型计算的库容变化为死库容减少16.36万m³,兴利库容减少14.51万m³,总库容减少27.05万m³,从库区地形地貌、时序遥感影像和库区工程建设情况对库容减少的原因进行了深入分析，验证了该方法计算库容的可靠性。【结论】结果表明：融合多源数据的库容曲线重构方法，克服了水上与水下数据差异的挑战，解决了传统方法在处理复杂地形时的局限性，提供了可借鉴的计算范式，能有效提高库容曲线重构的精度和效率，为水库防洪减灾工作提供科学依据，增强水库管理的效率和安全性。

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.

关键词

多源数据 / 合理性评估 / 库容曲线 / 防洪减灾 / 等高线容积法 / 水利工程

Key words

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

基金资助

国家自然科学基金项目(52074133)