CN103366099A - Hydrological model parameter debugging method - Google Patents

Abstract

The invention discloses a hydrological model parameter debugging method, which comprises the following steps that 1, different magnitudes of storm rainfall of a region are assumed; 2, a storm rain contour map of the region is searched; 3, basin characteristic parameters of the region are determined; 4, flood processes corresponding to the assumed storm rainfall are worked out according to the assumed storm rainfall and the storm rain contour map of the region by referring to the basin characteristic parameters of the region such as the river length, the area, the gradient and the storm rainfall; 5, the assumed storm rainfall in step 1 is changed, and the steps 1 to 4 are repeated; and 6, the different magnitudes of storm rainfall and the corresponding flood processes determined in steps 1 to 5 are input into a hydrological forecasting model for parameter debugging. The problems of final large flood forecast error, low precision and the like of the hydrological model caused by the fact that no historical hydrological data is supplied for parameter calibration of the hydrological model currently applied in the region without a hydrological station or hydrological data are solved, and the method can be used in the region with the hydrological data for the verification of hydrological forecasting parameters.

Description

A kind of Hydro-Model Parameter Calibration Technology adjustment method

Technical field

The invention belongs to the flood forecasting technical field, relate in particular to a kind of Hydro-Model Parameter Calibration Technology adjustment method.

Background technology

General hydrologic forecast model all needs to carry out parameter rating of the model before application, just can come into operation, and hydrology historical summary carries out the work of basic parameter calibration yet the calibration Hydro-Model Parameter Calibration Technology generally all needs for many years.But relative developed country is less for China hydrometric station, the small watershed easily sent out of flood damage particularly, essentially no hydrometric station or hydrologic data, therefore will use hydrological model in work of flood prevention predicts the difficulty that existence is very large to the flood of small watershed, exist predicated error large, the problem such as degree of accuracy is not high.

Summary of the invention

The technical problem to be solved in the present invention: a kind of Hydro-Model Parameter Calibration Technology adjustment method is provided, the particularly Hydro-Model Parameter Calibration Technology of Cross Some Region Without Data debugging, be applied at present without the parameter calibration of the hydrological model in hydrometric station or hydrologic data area owing to there not being historical hydrologic data to cause final hydrological model large to the Forecasting Flood error problem such as degree of accuracy is not high to solve.

Technical solution of the present invention:

A kind of Hydro-Model Parameter Calibration Technology adjustment method, it comprises the steps:

Step 1, suppose the storm rainfall of the different magnitudes in this area;

Step 2, search this area's heavy rain isogram;

Step 3, determine this area's drainage characteristics parameter;

Step 4, according to the storm rainfall of hypothesis and the heavy rain isogram of this area, in conjunction with river length of this area's drainage characteristics parameter, area, than falling and storm rainfall, calculates and suppose the corresponding peb process of storm rainfall;

Step 5, by change step 1 described hypothesis storm rainfall, repeat one to one peb process of different storm rainfalls institute that above-mentioned steps 2 to 4 calculates hypothesis;

Step 6, the storm rainfall that passes through the definite different magnitudes of step 1-5 and corresponding peb process thereof input to hydrologic forecast model and carry out parameter testing.

Beneficial effect of the present invention:

The employing of initiative of the present invention is by the storm rainfall of the different magnitudes of hypothesis, the parameters such as drainage characteristics according to the existing heavy rain isogram in this area and this area, calculate corresponding peb process and the time flow coordinate diagram of hypothesis storm rainfall, the storm rainfall of supposing is inputed to hydrologic forecast model with the peb process that calculates carry out parameter calibration, can determine the model parameter under the different storm rainfalls, solved the parameter calibration that is applied at present without the hydrological model in hydrometric station or hydrologic data area owing to there not being historical hydrologic data to cause final hydrological model large to the Forecasting Flood error, the problems such as degree of accuracy is not high, also can verify the hydrologic forecast parameter that the hydrologic data area is arranged by the present invention simultaneously, improve its forecast degree of accuracy.

Description of drawings:

Embodiment:

A kind of Hydro-Model Parameter Calibration Technology adjustment method of Cross Some Region Without Data, it comprises the steps:

Step 1, suppose the storm rainfall of the different magnitudes in this area before the Offered model parameters, generally to need many different magnitude flood data, therefore need the storm rainfall of many different frequencies of hypothesis, as calculating input.

Step 2, search this area's heavy rain isogram, according to " flood heavy rain reckoner " (or similar hydrology reckoner, hereinafter referred " handbook), " handbook can be by looking into the some face relation of calculating rainstorm statistics parameter, heavy rain isogram, short duration Rain Intensity Formula Based, heavy rain etc.;

Step 3, determine this area's drainage characteristics parameter, the drainage characteristics ginseng mainly finger river length, area, than degradation characteristic parameter;

Step 4, according to each storm rainfall of hypothesis and the heavy rain isogram of this area, in conjunction with river length of this area's drainage characteristics parameter, area, than falling and storm rainfall, can calculates and suppose the corresponding peb process of storm rainfall;

Step 5, by change step 1 described hypothesis storm rainfall, repeat one to one peb process of different storm rainfalls institute that above-mentioned parameter calculates hypothesis, peb process is a time flow coordinate diagram;

Step 6, the storm rainfall that passes through the definite different magnitudes of step 1-5 and corresponding peb process thereof, input to hydrologic forecast model and can carry out parameter testing by conventional method, determine the parameter calibration of hydrologic forecast model, realize the correct calibration of Hydro-Model Parameter Calibration Technology.

Claims (1)

1. Hydro-Model Parameter Calibration Technology adjustment method, it comprises the steps:

Step 1, suppose the storm rainfall of the different magnitudes in this area;

Step 2, search this area's heavy rain isogram;

Step 3, determine this area's drainage characteristics parameter;

Step 4, according to the storm rainfall of hypothesis and the heavy rain isogram of this area, in conjunction with river length of this area's drainage characteristics parameter, area, than falling and storm rainfall, calculates and suppose the corresponding peb process of storm rainfall;

Step 5, by change step 1 described hypothesis storm rainfall, repeat one to one peb process of different storm rainfalls institute that above-mentioned steps 2 to 4 calculates hypothesis;

Step 6, the storm rainfall that passes through the definite different magnitudes of step 1-5 and corresponding peb process thereof input to hydrologic forecast model and carry out parameter testing.