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Agricultural drought early warning system

An early warning system and drought technology, applied in forecasting, instrumentation, climate change adaptation, etc., can solve problems such as different forecasting trends, failure to reflect crop resistance and hysteresis effects, and incomparability

Inactive Publication Date: 2017-06-09
YUNNAN HANZHE TECHN CO LTD
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Problems solved by technology

[0004] As far as the existing technology is concerned, for agricultural drought, the calculation of the drought index is only performed on a certain element. Although good results have been achieved in specific areas, it remains to be demonstrated whether the index can be expanded in time and space. The resistance to drought and the hysteresis effect are not reflected, and the prediction trend is also different with the selection of indicators. These problems lead to the incomparability of the indicators in different regions, and there are certain deviations in the prediction results

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[0133] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0134] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0135] like figure 1 As shown, a kind of agricultural drought early warning system of the embodiment of the present invention comprises the following steps:

[0136] S101: Calculation of unidirectional agricultural drought index;

[0137] (1) Standardized Precipitation Index (SPI)

[0138] (2) Relative soil humidity (Rsm)

[0139] (3) Crop Water Deficit Index (CWDI)

[0140] (4) Number of consecutive days without effective precipitation (snowfall, snow accumulation) (Dnp)

[0141...

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Abstract

An agricultural drought early warning system disclosed by the present invention comprises the steps of calculating an unidirectional agricultural drought index; calculating a comprehensive agricultural drought index, and combining the unidirectional agricultural drought index to determine whether the agricultural drought occurs at a point in a region; calculating a regional agricultural drought index and a time agricultural drought index, determining the occurrence range and time of the agricultural drought determining the development status of the agricultural drought, and sending out the corresponding agricultural drought early warning. The agricultural drought early warning system integrates the more mature theoretical and practical drought indexes to monitor and early warn the regional agricultural drought, comprehensively considers a plurality of factors causing the agricultural drought, improves the agricultural drought monitoring reasonability, expands the spatial and temporal scales of the agricultural drought monitoring, enables the users to compare and analyze the agricultural drought situations and degrees in different regions and at different time periods more flexibly, and improves the applicability.

Description

technical field [0001] The invention relates to the technical field of agricultural drought prediction, in particular to an agricultural drought early warning system. Background technique [0002] In recent years, the frequency and intensity of extreme climate events such as droughts caused by global climate change have shown a significant increase trend, which has had a profound impact on the sustainable development of ecosystems and human society. Data show that the risk of global drought will further increase in the 21st century. How to accurately monitor the time of drought, assess the degree of drought, and mitigate the impact of drought has become an important scientific problem to be solved. [0003] At the same time, as a complex phenomenon, it is difficult to directly observe the occurrence time, development process and impact range of drought. Therefore, drought events are mainly described by drought indicators at present. The existing agricultural drought monitor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/02
CPCG06Q50/02G16Z99/00Y02A40/22
Inventor 傅南昌罗元金邓昌军李锐田昌王琳林迪
Owner YUNNAN HANZHE TECHN CO LTD
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