Multi-scale characteristics analysis of annual inflow runoff of Nanma reservoir

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Chunmei, Kong^1 ; Jinhong, Chen^1 ; Fei, Xiong^1 ; Rucheng, Jiang^1

Yunnan Water Conservancy and Hydropower Survey and Design Institute, Kunming

650021, China^1

关键词: Annual runoff;    Characteristics analysis;    Empirical Mode Decomposition;    Hilbert Huang transforms;    Mann-Kendall;    Precipitation of flood seasons;    Rescaled range analysis;    Reservoir optimizations;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/3/032079/pdf
DOI  :  10.1088/1755-1315/267/3/032079

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The inflow runoff of reservoir plays a vital role on the reservoir optimization regulation and flood control. Based on the inflow runoff series of Nanma reservoir for the period of 1960-2004, the annual and inter-annual characteristic of runoff series were analyzed. After decomposed by the approach of Empirical Mode Decomposition, the multi-scale characteristic of annual inflow runoff was analyzed by the methods of Hilbert-Huang transform, Mann-Kendall and Rescaled Range Analysis. The results showed that, for the past 45 years the average monthly runoff of Nanma reservoir presented single peak distribution. The precipitation of flood season was the main source for annual inflow runoff. The multi-scale characteristic of annual inflow runoff was obviously and presented various periods of 2.4a, 3a, 6a and 12a. The mutation time of annual runoff was 1961, and the runoff would continue to have a increase trend in the future.