Weather-land surface-hydrological process full-coupling simulation method

Abstract

The invention discloses a weather-land surface-hydrological process full-coupling simulation method, which relates to the field of global changes and hydrological water resources; the method comprises the following steps: determining key interaction variables, and formulating a climatic-land surface- hydrological process full-coupling mechanism, including a climatic process, a land surface process and a hydrological process; determining a runoff production method based on a nonlinear mechanism and a nonlinear system theory of a water circulation process; determining a climate-land surface- hydrological process calculation scale and a conversion method; determining a confluence method, and respectively matching different confluence modes to perform confluence calculation; carrying out convergence calculation on the hydrological process scale, feeding back soil humidity results to the land surface process and the climate process, and realizing climate-land surface-hydrological process full-coupling simulation. According to the method, the influence of the hydrological process change on the climate process and the land surface process can be achieved while the influence of the climate change on the land surface process and the hydrological process is achieved, and particularly climate and land surface hydrological process simulation under complex terrain conditions can be improved.

Description

technical field [0001] The invention relates to the fields of global change and hydrology and water resources, in particular to a fully coupled simulation method based on climate-land surface-hydrology processes. Background technique [0002] Climate models are important tools for climate simulation, and regional climate models have higher resolution and simulation accuracy than global climate models. However, for a specific watershed, the water cycle process of the regional climate model is relatively simplified, cannot reflect the real precipitation-runoff relationship, lacks the corresponding physical meaning, and is difficult to accurately reflect the complex nonlinear hydrological process in the watershed. Most traditional hydrological models perform two-dimensional or three-dimensional hydrological process simulations based on high-resolution (1 km resolution or finer) underlying surface information. The simulation accuracy is much higher than that of climate models, b...

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Problems solved by technology

However, such a single-direction analysis method will lead to the absence of the feedback mechanism of the hydrological process to the climate response, so that the real water cycle process cannot be accurately described in the long-term simulation process, and the evaporation process and atmospheric transport process in the water cycle process are ignored. The influence of regional precipitation, etc., can easily cause deviations in forecasting precipitation simulations and further reduce the accuracy of water resources forecasting

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