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Runoff simulation method and system based on hydro-meteorological time sequence

A time series, simulation method technology, applied in CAD numerical modeling, special data processing applications, instruments, etc., can solve problems such as low analysis efficiency and inconvenient analysis of simulation results

Pending Publication Date: 2020-08-14
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a runoff simulation method and system based on hydrometeorological time series to solve the problem that the simulation results of the existing runoff simulation methods are not easy to analyze and lead to low analysis efficiency

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Embodiment 1

[0078] A method for simulating runoff based on hydrometeorological time series, the present embodiment implements the following process based on an open source Python language platform, specifically including:

[0079] S1. Use the third-party library Pandas package in Python to read hydrometeorological observation time series data as input data, including watershed precipitation, evaporation capacity and runoff data;

[0080] S2. Through the Python language platform, build a runoff simulation model based on the principle of the GR4J hydrological model, and use the optimize module in the Python third-party library Scipy package to calibrate the parameters of the model by setting a regular time period, and obtain each The watershed state of the time period, the data format of the watershed state is pandas.Series, and the index is date and time; by setting the time period of the verification period, according to the parameters determined by the calibration of the runoff simulation...

Embodiment 2

[0123] This embodiment 2 is based on the runoff simulation method based on the hydrometeorological time series provided in the embodiment 1, and the runoff simulation is carried out with the hydrometeorological observation time series of the Little Pigeon River Basin in Tennessee, USA. Specific steps are as follows:

[0124] S1. Use the class statement to define the class, and use def() to define functions such as calibration, verification and runoff simulation in the class, realize the mathematical process and visualization process related to the function through programming, encapsulate it into a class function, and save it as . py file;

[0125] S2. Use the time series of hydrometeorological observations in the Little Pigeon River Basin in Tennessee as the data source, such as image 3 , the first column is the date index corresponding to the observation value, the second column is the precipitation observation value, the third column is the evaporation observation value, ...

Embodiment 3

[0138] A runoff simulation system based on hydrometeorological time series, including:

[0139] A data input module for obtaining a time series of hydrometeorological observations, including watershed precipitation, evaporation capacity and runoff data;

[0140] The parameter calibration module is used to establish a runoff simulation model; set a regular time period, and calibrate the parameters of the runoff simulation model based on the hydrometeorological observation time series, and obtain the watershed state at each time period; and used to set The time period of the verification period is fixed, and the model applicability is verified with the meteorological time series of the verification period according to the parameters determined by the calibration of the runoff simulation model and the state of the watershed in each period. The verification index is the Nash efficiency coefficient.

[0141] Meteorological data input module, used to obtain meteorological time serie...

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Abstract

The invention discloses a runoff simulation method and system based on a hydro-meteorological time sequence. The method comprise the following steps: a runoff simulation model is established based onthe principle of a GR4J hydrological model; the runoff simulation is carried out on the drainage basin by utilizing a hydro-meteorological time sequence; the runoff simulation result with the time sequence can be directly used for analysis and drawing, a hydrology worker can know the specific time corresponding to each data result without post-processing the result, and the problem of analysis inconvenience caused by the fact that a traditional hydrology simulation result does not have the time sequence is solved. According to the invention, the model parameters and the drainage basin state ofeach time period can be automatically determined only by inputting the hydro-meteorological observation time sequence and the set rate periodic time, and the observation and runoff simulation time sequence comparison diagram of the rate periodic time and the verification period can be obtained at the same time. According to the invention, the automatic treatment of runoff simulation is realized,and the runoff simulation work of one drainage basin can be efficiently completed.

Description

technical field [0001] The invention relates to the technical field of hydrological analysis and hydrological simulation, in particular to a runoff simulation method and system based on hydrometeorological time series. Background technique [0002] The basin hydrological model is a mathematical model to simulate the rainfall-runoff formation process or the snowmelt-runoff formation process in the basin, that is, quantitative analysis from precipitation, snowmelt, interception, subsidence, evaporation, infiltration, runoff component division, slope confluence and river channel confluence. The whole process from the formation of the runoff hydrograph of the watershed outlet section can provide a reference for hydrologists in actual work analysis. At present, when the hydrological model is used for runoff simulation, because the data does not have a time series, the output runoff simulation result is an array, and post-processing is required to match the data results with the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F111/10G06F113/08
CPCG06F30/20G06F2111/10G06F2113/08
Inventor 赵铜铁钢陈泽鑫黄泽青
Owner SUN YAT SEN UNIV
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