Water resource drought evaluation system

Abstract

The invention discloses a water resource drought evaluation system. A method comprises the following steps: calculating a generalized water supply amount; calculating a generalized water demand amount; constructing a drought evaluation index based on a water resource system; and verifying the index: comparing the calculated drought evaluation index value with the actual drought condition of a typical session to verify the reasonability of the index. Compared with the prior art, the drought evaluation index is constructed from the perspective of the water resource system, so that the problem in drought evaluation for a long term is solved, the unified evaluation of meteorologic, hydrologic, agricultural and socioeconomic droughts is realized, and the characteristics of a drought event are scientifically and comprehensively reflected. The system is widely applied to the drought evaluation of a river basin or a region greatly influenced by human activities and especially suitable for the quantitative drought evaluation of the East Liaohe River basin.

Description

technical field [0001] The invention relates to the technical field of drought monitoring, in particular to a water resource drought evaluation system. Background technique [0002] Under the influence of climate change and human activities, droughts around the world generally present a trend of frequent, frequent, continuous and concurrent. Since 1900, global drought disasters have killed more than 11 million people and affected more than 2 billion people. In the past 50 years, my country's meteorological disaster losses accounted for 61% of all natural disaster losses, while drought disaster losses accounted for 55% of meteorological disaster losses. Droughts not only occur in the northern regions where water resources are relatively scarce, but also frequently occur in the southern regions where water resources are relatively abundant. In recent years, large-scale and long-term drought events have occurred in the southwest and the middle and lower reaches of the Yangtze...

AI Technical Summary

Problems solved by technology

[0007] The main disadvantage of these methods is that the evaluation is based on a single or several links of the water cycle, which splits the integrity of the water cycle, and it is difficult to reflect the natural and social attributes of drought, and it is difficult to characterize the dual characteristics of randomness and determinacy of drought.

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