| Cite this article: | 简鸿福,韩会明.鄱阳湖五河入湖水沙丰枯遭遇关系分析[J].灌溉排水学报,0,():-. |
| Jianhongfu,HanHuiming.鄱阳湖五河入湖水沙丰枯遭遇关系分析[J].灌溉排水学报,0,():-. |
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| Analysis on the relationship between the abundance and dryness of water and sediment in the five rivers entering the lake in Poyang Lake |
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Jianhongfu1, HanHuiming2
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1.Jiangxi Academy of Water Sciences and Engineering;2.Nan Chang University
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| Abstract: |
| [Objective] To investigate the variation of water and sand abundance in the five rivers of Poyang Lake and its influencing factors. [Method] Based on the runoff-sediment data of the control hydrological station in the "Five Rivers" basin of Poyang Lake, the sliding correlation coefficient method, the double cumulative curve method, and the copula function are used to reveal the evolution of water and sediment in the basin, and to quantitatively evaluate the probability of occurrence of flood and drought events in the basin during different periods. [Results] The results show that the total runoff of the five rivers into the lake is increasing, of which the runoff of the Xiu River has a significant increase, the total sediment volume has a significant decrease, but the Rao River has a significant increasing trend of sediment volume; The water-sediment relationship has undergone abrupt changes except for the Fuhe River. Among them, the Xinjiang River has a maximum runoff increase of 15.9% after the abrupt change in the water-sediment relationship, the Ganjiang River has a maximum decrease of 67.3%, and the Raohe River has a maximum increase of 100.3% during the P3 period (2004-2018) compared with the P1 period (1956-1971); In different periods, the probability of the asynchrony of high and low levels of water and sand in the "Five Rivers" is less than the probability of synchronous high and low levels, and the probability of the same level of high and low levels is the highest; [Conclusion] The characteristics of extreme precipitation, the implementation of soil and water conservation projects, reservoir construction and river sand mining have far-reaching impacts on water and sediment changes in the basin |
| Key words: Copula function; water-sediment relationship; Poyang Lake Basin; climate change; human activities |
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