Method for judging remarkable influence period of human activities on river flow

Abstract

The invention provides a method for judging a remarkable influence period of human activities on river flow. The method includes collecting and studying long-sequence monthly hydrometeorological data in a river basin; preliminarily judging years of change in remarkable influence on yearly flow due to the human activities; screening a hydrologic model suitable for the studied river basin; simulating a full-sequence flow process; counting simulation error standard quantity SREi of each year on yearly flow; drawing a yearly process of the simulation error standard quantity; judging the remarkable influence period of the human activities on the river flow according to the circumstance that the yearly process deviates from a horizontal axis. On the basis of mathematic statistics and hydrologic process physical simulation methods, the influence period of the human activities on the river flow is diagnosed, possible influence of climate factors on the river flow is scientifically abandoned, a diagnosis result is uniform with actual conditions of the human activities in the river basin, and misjudgment on the remarkable influence period of the human activities due to influence, of the climate elements, on a hydrologic sequence when a conventional method is adopted is avoided effectively, so that the given diagnosis result is more scientific and reasonable.

Description

technical field [0001] The invention relates to the application field of hydrology and water resources, in particular to a method for judging the significant impact period of human activities on river runoff processes. Background technique [0002] With the rapid development of social economy, a large number of water conservancy projects and transportation projects have been built in many river basins. At the same time, the continuous improvement of urbanization rate and significant changes in the underlying surface of the river basin have directly affected the law of water production and confluence in the basin, as well as water storage. , Water use and water consumption conditions. Under the background of global warming, the temperature in various places has also risen to varying degrees, and the precipitation in different regions has also shown a trend of increasing or decreasing. Affected by various factors such as climate change and changes in the underlying surface en...

AI Technical Summary

Problems solved by technology

However, the hydrological sequence is comprehensively affected by human activities and climatic elements. The above-mentioned traditional hydrological variation analysis method may not be caused by a single element of human activities. The variation of climatic elements may also cause the variation of the hydrological sequence. Therefore, the traditional mathematical statistical analysis and diagnosis methods are difficult to meet the needs of the analysis and evaluation of the hydrological effects of human activities.

In addition, hydrological sequence variation can also be judged through large-scale investigations of human activities in the watershed. However, a large number of field investigations require a lot of manpower, material resources, and financial support, which is a time-consuming and labor-intensive approach.

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