Novel hydrological model based on gridding drainage basin and classification calibration

Abstract

The invention discloses a novel hydrological model based on a gridding drainage basin and classification calibration, and belongs to the field of hydrological and water resource research. The model ischaracterized by adding a glacier module into an HBV runoff production model to obtain an improved runoff production model; and applying the improved runoff production model to each grid unit of theresearched drainage basin to obtain a hydrological element simulation value of each grid unit of the drainage basin, and collecting the runoff simulation value of each grid unit of the drainage basinto an outlet of the whole drainage basin by utilizing a confluence model based on a linear transfer function to obtain a runoff estimated value of the whole drainage basin. According to the hydrological model, the runoff simulation can be carried out in the regions / basins lacking data, the simulation values of all state variables in the basins are obtained, and the technical support is provided for the research of different influences of the climate changes on all hydrological elements in the basins, and therefore the sustainable development and water resource management of the basins can be better guided.

Description

technical field [0001] The invention relates to the field of hydrology and water resources research, in particular to a new hydrological model based on gridded river basins and classification ratios. Background technique [0002] Since the 20th century, global warming has become an indisputable fact. According to the fifth research report of the IPCC (Intergovernmental Panel on Climate Change), during the more than 100 years from 1880 to 2012, the average surface temperature of the global ocean and land showed a linear upward trend, with a total increase of 0.85°C. Global warming will affect environmental factors such as precipitation and temperature on a global scale, and change the distribution of water resources in time and space, resulting in a significant impact on the hydrological cycle at the regional / watershed scale. High latitude regions / watersheds and alpine cold regions The impact is particularly pronounced. The use of hydrological models can effectively simulat...

AI Technical Summary

Problems solved by technology

However, the lumped runoff model can only simulate the runoff of the entire watershed and cannot reflect the state variables inside the watershed (such as runoff, spatial distribution of snow cover, etc.), which is of great significance for further research on the impact of climate change on various hydrological elements in the watershed (such as glaciers). , snow cover, etc.) are extremely unfavorable

Images