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Prediction method of ndvi in ​​grassland area of ​​northern China based on tdnn

A forecasting method, a technology from northern China, applied in forecasting, data processing applications, instruments, etc., to solve problems such as time relations

Active Publication Date: 2021-05-04
TIANJIN UNIV
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  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the existing NDVI prediction technology for the grassland areas in northern China, using the observation data of rainfall and NDVI in the past to provide a prediction method for NDVI in the grassland areas in northern China based on TDNN, which effectively solves the problem of rainfall The problem of the time relationship between the amount and the input of the model when modeling NDVI has realized the accurate prediction of NDVI, thereby indirectly realizing the accurate prediction of the theoretical stock carrying capacity in the future years, which will be beneficial to the realization of scientific grazing and vegetation restoration and protection in grassland areas

Method used

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  • Prediction method of ndvi in ​​grassland area of ​​northern China based on tdnn
  • Prediction method of ndvi in ​​grassland area of ​​northern China based on tdnn
  • Prediction method of ndvi in ​​grassland area of ​​northern China based on tdnn

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Embodiment

[0058] Now based on Hulunbeier Ewenki area 1961-2014 year growing season rainfall monthly mean, 2000-2014 year growing season NDVI monthly mean, in conjunction with the establishment method of this area NDVI prediction model to the present invention based on TDNN North China grassland area NDVI The prediction method is described in detail.

[0059] 1. Select the input variables of the prediction model, conduct correlation analysis based on SPSS statistical software, and finally determine the input sequences P(t-1), P(t-2), and P(t-3) corresponding to P(t);

[0060] 2. Obtain the training data and test data of the rainfall TDNN prediction model, according to figure 1 The process of importing the training data into the rainfall TDNN prediction model, and training the rainfall TDNN prediction model;

[0061] 3. Determine the structure of the optimal model, figure 2 As shown, the input variables are determined to be P(t-1), P(t-2), P(t-3), that is, the rainfall of the previous ...

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Abstract

The invention discloses a TDNN-based prediction method for NDVI in grassland areas in northern China: establishing a TDNN prediction model for monthly average rainfall in future annual growing seasons; establishing a mapping model for monthly average rainfall-NDVI in future annual growing seasons; predicting rainfall TDNN The monthly average forecasted value of rainfall in the future annual growing season produced by the model is substituted into the rainfall-NDVI mapping model to obtain the monthly average forecasted value of NDVI in the future annual growing season. The present invention can accurately predict the average value of NDVI in the growing season (June-August), thereby realizing the estimation of the livestock quantity (carrying capacity) that can be grazed in future years according to the predicted value of NDVI. grazing strategies to avoid overgrazing in disaster years.

Description

technical field [0001] The invention relates to the field of NDVI predictive modeling, and more specifically, relates to a TDNN-based NDVI predictive method in grassland areas in northern China. Background technique [0002] In the past 30 years, the vegetation in the northern China grasslands has been seriously degraded. On the one hand, it is attributed to the rapid development of animal husbandry in the grasslands, that is, the continuous increase of overgrazing, which leads to a significant imbalance between grass production and livestock numbers, and finally leads to continuous grasslands. degradation and desertification. On the other hand, due to the abnormal annual variation of rainfall in this area, severe drought and flood disasters occurred in very few years, which seriously threatened the protection and restoration of the grassland ecological environment in this area, as well as the sustainable development of grassland animal husbandry. [0003] At present, the e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04G06Q50/02G06N3/06
CPCG06N3/061G06Q10/04G06Q50/02
Inventor 马建国吴淘锁傅海鹏白红梅
Owner TIANJIN UNIV
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