Hydrological model segmented screening method suitable for forecasting and early warning of rainstorm mountain torrent flood in small watershed in mountainous area

Abstract

The invention provides a hydrological model subsection screening method suitable for forecasting and early warning of rainstorm mountain torrent flood in a small watershed in a mountainous area, whichdivides actually measured flood and flood simulated by a hydrological model into an expansion starting section, an abrupt expansion section, a disaster forming section and a water recession section.The hydrological model is screened by comparing the calculation results of the hydrological model for the abrupt expansion section and the disaster section with the actually measured flood, the earlycapturing capability of the hydrological model for some key disaster early warning moments of the abrupt expansion section is fully considered, the screened hydrological model can capture the disastermoment caused by the abrupt expansion of the rainstorm flood in advance, and missed alarm can be avoided. The accuracy and reliability of early warning of the rainstorm and mountain torrent disastersin the small watershed of the mountainous area are improved, and more scientific guidance and technical support can be provided for forecasting and early warning of the rainstorm and mountain torrentdisasters in the small watershed of the mountainous area.

Description

technical field [0001] The invention belongs to the field of disaster prevention and mitigation of rainstorm and mountain torrent disasters, and relates to a segmental screening method for hydrological models suitable for rainstorm, mountain torrent and flood forecasting and early warning, and is suitable for auxiliary screening of suitable hydrological models in the field of rainstorm, mountain torrent and flood forecasting and early warning in small mountainous watersheds. Background technique [0002] Mountain torrents refer to the general term for the floods caused by floods along rivers and streams in mountainous areas due to heavy rain, collapse of flood control facilities, etc., and the accompanying landslides, collapses, and debris flows. Flash flood disasters are the hazards caused by flash floods, including casualties, property losses, infrastructure damage, and environmental resource damage caused by flooding of streams and rivers, mudslides, and landslides. In re...

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Problems solved by technology

However, the existing technology mainly relies on the simulation effect of the overall flood process and the characteristic parameters of the flood peak to judge the applicability of the hydrological model, and does not take into account the ability of the hydrological model to capture some key disaster warning moments in advance, which may cause The hydrological model selected by the traditional method is difficult or unable to capture the key disaster-causing moment of the steep flood section in advance, resulting in low alarm accuracy and even missing alarms.

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