Irrigated area monitoring method and device

Abstract

The invention provides an irrigation area monitoring method and device and belongs to the field of irrigation water management. The irrigation area monitoring method comprises step 1) respectively selecting remote-sensing images before and after irrigation according to irrigation time, and conducting data preprocessing to the selected remote-sensing images; step 2) laying ground marking points and collecting information which indicates whether the marking points are irrigated or not; step 3) respectively computing MPDIs (Modified Perpendicular Drought Indexes) before and after irrigation by using the preprocessed remote-sensing images before and after irrigation; step 4) computing MPDI difference before and after irrigation in an irrigation region, and determining an MPDI difference threshold in combination with the information which indicates whether the marking points are irrigated or not; step 5) extracting the area with the MPDI difference which is larger than the MPDI difference threshold as the actual irrigation area of the irrigation region. The technical scheme provided by the invention can effectively monitor the actual irrigation area of the irrigation region.

Description

technical field [0001] The invention relates to the field of irrigation water management, in particular to an irrigation area monitoring method and device. Background technique [0002] Water is one of the world's most precious natural resources. With the increase of population, the development of social economy and the destruction of water bodies by pollution, human beings are increasingly facing the crisis of water shortage in the past half century. [0003] Agricultural irrigation water accounts for about 70-80% of the global human freshwater consumption; agricultural water consumption is the largest water user in my country. At present, my country's agricultural irrigation water consumption accounts for about 70% of the country's total water consumption. In the future, with the rapid development of social economy and the rapid increase of population, on the one hand, in order to solve the problem of food security, the demand for agricultural irrigation water will contin...

AI Technical Summary

Problems solved by technology

[0005] my country's existing irrigated area is 1.002 billion mu, and there are only 456 large-scale irrigation areas of more than 300,000 mu. At present, there is no monitoring of the actual irrigated area.

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