Regional farmland irrigation water consumption analysis and calculation method

Abstract

The invention discloses a regional farmland irrigation water consumption analysis and calculation method, which comprises the following steps of: 1, deducing regional total water consumption based on a water amount balance equation by taking precipitation, entry and exit water amount, cross-basin water transfer amount and water storage variables monitored by remote sensing as input; 2, selecting a remote sensing evapotranspiration product by taking the deduced total water consumption as a constraint, and obtaining the total water consumption driven by regional solar energy; 3, acquiring a farmland range based on land utilization space distribution, calculating water consumption of the farmland region by using a remote sensing evapotranspiration product, and deducting effective precipitation in the water consumption to obtain irrigation water consumption; 4, calculating the irrigation water consumption based on the proportional relation between the irrigation water consumption and the irrigation water consumption; and 5, when the regional multi-year irrigation water consumption is analyzed, collecting multi-year data, repeating the steps, and calculating the year-by-year farmland irrigation water consumption. The method has the advantages that the large-scale farmland irrigation water consumption can be quickly calculated, and the statistical survey data of the agricultural irrigation water can be rechecked.

Description

technical field [0001] The invention relates to the technical field of agricultural irrigation water analysis, in particular to a regional farmland irrigation water analysis and calculation method based on multi-source remote sensing data and water balance principles. Background technique [0002] With the development of social economy and rapid population growth, as well as the impact of global climate change, the problem of water shortage is becoming more and more serious. Agricultural water accounts for 62% of my country's total water use, and irrigation water accounts for more than 90% of agricultural water use. Accurate estimation of irrigation water consumption has an important impact on the accuracy of total water consumption statistics, and is also of great significance to water resource management. However, the total amount of agricultural water use is large, the unit amount is small and scattered, and the measurement is more difficult than industrial and domestic ...

AI Technical Summary

Problems solved by technology

Remote sensing data products such as remote sensing evapotranspiration, crop growth, and gravity satellite land water storage are constantly enriched, and are expected to fill in the gaps in the monitoring of water consumption and water storage changes in the water balance equation. It is necessary to solve the conceptual correspondence between remote sensing data and water balance elements, and how to combine multiple remote sensing products to support irrigation water estimation

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