Research method based on GAMLSS model sediment transport contribution rate

Abstract

The invention discloses a research method based on a GAMLSS model sediment transport contribution rate. The method comprises the steps of firstly collecting and arranging flow and sediment informationof a drainage basin outlet station; then computing a relation between each index and sediment transport and a fitting process line, computing 90% P-factor and R-factor, 50% quantile sequence varianceand a mean value, a correlation coefficient and an AIC; then using an attribution analysis method to analyze six indexes, thus acquiring an influence degree of each index on sediment transport variation; and at last, computing a contribution rate of each index to sediment transport. According to the research method based on the GAMLSS model sediment transport contribution rate provided by the invention, the problem that the prior art cannot accurately and comprehensively acquire the influence degree of the climate change and the human activities on the sediment transport contribution rate issolved, the principal component regression analysis is used, the influence of multicollinearity is eliminated, the influence generated by each variable mean is considered, and the influence of each variable interannual variance change on sediment transport is also considered.

Description

technical field [0001] The invention belongs to the technical field of hydrology and water resources, and relates to a research method for the contribution rate of sediment transport based on the GAMLSS model. Background technique [0002] In recent decades, the climate has changed significantly, the global temperature has risen, the precipitation pattern has changed, the precipitation has increased, El Nino, drought and floods and other extreme weather have increased, icebergs, perennial snow melting and the impact of human activities have caused geological and landforms to suffer. Destruction, exacerbated soil erosion and sediment loss. The change of water and sediment is one of the major issues of general concern in the world today. The change of water and sediment is not only affected by climate change, but also human activities such as land use are the main reasons for the change of water and sediment. The impact of human activities includes: construction of water cons...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a research method based on the contribution rate of sediment transport based on the GAMLSS model, which solves the problem that the existing contribution rate calculation technology only divides the influencing factors into two categories: climate change and human activities, resulting in the inability to accurately calculate the change of sediment transport The specific contribution rate of multiple impact factors

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