Groundwater Response of Loess Tableland in Northwest China under Irrigation Conditions

Water induced loess landslides are closely related to the rise of the groundwater level. Therefore, research on the response of the groundwater level to irrigation water holds promise for revealing the mechanism of water-induced loess landslide. Taking Heitai, Gansu Province, as the research area, a...

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Bibliographic Details
Published in:Water (Basel) 2020-09, Vol.12 (9), p.2546
Main Authors: Dai, Fuchu, Guo, Qinghua
Format: Article
Language:English
Subjects:
Accuracy
Bayesian analysis
Causes of
China
Environmental aspects
Groundwater
Groundwater flow
Groundwater irrigation
Groundwater levels
Hydraulics
Hydrology
Irrigation
Irrigation water
Landslides
Loess
Measurement
Optimization
Parameter estimation
Partial differential equations
Particle size
Research methodology
Simulation
Software
Test methods
Water table
Water, Underground
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Summary:Water induced loess landslides are closely related to the rise of the groundwater level. Therefore, research on the response of the groundwater level to irrigation water holds promise for revealing the mechanism of water-induced loess landslide. Taking Heitai, Gansu Province, as the research area, a coupling model o unsaturated-saturated water movement is established using the HYDRUS-MODFLOW software. The parameters of the model are calibrated and verified by the Bayesian parameter inversion method combined with field observations of the groundwater level. Finally, the change in the groundwater level under different irrigation amounts is predicted using the optimized model. It is found that a reasonable reduction of the irrigation amount can effectively slow the rise of the groundwater level. This research provides a scientific reference for the development of reasonable irrigation measures.
ISSN:2073-4441
2073-4441
DOI:10.3390/w12092546