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Distributed hydrological simulation based drought assessment and forecasting model method

A distributed hydrology and forecasting model technology, applied in weather forecasting, special data processing applications, measuring devices, etc., can solve the problems of incomplete results, difficult to reflect differences in drought conditions, and singleness, and achieve the effect of promoting the transformation of active drought prevention.

Inactive Publication Date: 2013-03-06
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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Problems solved by technology

If a single indicator is used to assess drought in isolation, the results are incomplete and sometimes ambiguous
Moreover, some indicators are too single to reflect the development and changes of drought with precipitation deficit and duration, and it is difficult to reflect the regional and seasonal differences of drought
In addition, most of the existing drought assessment methods and drought level indicators are used to evaluate the drought situation that has occurred, but lack the function of forecasting and forecasting

Method used

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  • Distributed hydrological simulation based drought assessment and forecasting model method
  • Distributed hydrological simulation based drought assessment and forecasting model method
  • Distributed hydrological simulation based drought assessment and forecasting model method

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Embodiment Construction

[0026] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0027] figure 1 Shown is the principle block diagram of the present invention's drought assessment and forecast model method based on distributed hydrological simulation, and the specific implementation steps are as follows:

[0028] Step 1: Build a watershed spatial geographic information base based on geographic information systems, including digital elevation DEM, soil type distribution map, land use distribution map, vegetation leaf area index LAI distribution map, river system distribution map and engineering characteristic parameters of large and medium-sized reservoirs Wait.

[0029] The embodiment of the present invention is illustrated by taking the upper reaches of the Yangtze River as an example, wherein the digital elevation DEM comes from the DEM data of the China Bureau of Surveying and M...

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Abstract

A distributed hydrological simulation based drought assessment and forecasting model method includes steps of firstly, establishing a river basin space geological information base on the basis of a geological information system; secondly, establishing a distributed hydrological model based on a geomorphic grid unit by means of a GIS (geological information system) spatial analysis tool on the basis of the river basin space geological information base, utilizing meteorological data as input conditions of the model, applying the distributed hydrological model for distributed simulation of river basin process, and taking simulation results as various outputted hydrological feature information; thirdly, establishing a drought forecasting model on the basis of hydrologic budget according to the internal relation among various meteorological hydrological features, and utilizing PDSI (palmer drought severity index) as comprehensive balance index of drought severity. The drought forecasting model based on distributed hydrological simulation has advantages on aspects of displaying regional distribution features of the drought severity and evolution trend along with time and the like and can forecast and predict development and change of the drought severity by combining with meteorological information.

Description

technical field [0001] The invention relates to the technical field of drought forecast and early warning, in particular to a drought assessment and forecast model method based on distributed hydrological simulation. Background technique [0002] Drought and water shortage have become one of the important factors restricting the sustainable development of my country's economy and society. Droughts have been frequent in our country's history, but the new trend that has emerged is even more worrying. In recent years, almost all provinces in the country have experienced droughts, and the losses from droughts have shown an increasing trend. Even in the humid southern regions, local drought losses are even greater than floods. The serious losses caused by droughts in recent years are not only due to the lack of local precipitation caused by climate change, but also due to the incomplete water conservancy infrastructure, backward agricultural production technology, and the diffic...

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Application Information

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IPC IPC(8): G06F17/50G01W1/10
Inventor 许继军
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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