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A Runoff Change Attribution Identification Method Considering the Temporal and Spatial Evolution of Land Use

A space-time evolution and runoff technology, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve problems that cannot consider the space-time evolution of land use

Active Publication Date: 2018-08-21
HOHAI UNIV
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Problems solved by technology

Since the distributed hydrological model can describe the spatial information of the watershed, it is widely used in the identification of runoff change attribution. The usual practice is to use one-period land use data instead of a whole period of modeling, which cannot consider the temporal and spatial evolution of land use, especially It is a period of drastic changes in human activities

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  • A Runoff Change Attribution Identification Method Considering the Temporal and Spatial Evolution of Land Use
  • A Runoff Change Attribution Identification Method Considering the Temporal and Spatial Evolution of Land Use
  • A Runoff Change Attribution Identification Method Considering the Temporal and Spatial Evolution of Land Use

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Embodiment Construction

[0069] The technical solutions of the present invention will be further specifically described below through embodiments in conjunction with the accompanying drawings.

[0070] The present invention provides a runoff change attribution identification method considering the spatiotemporal evolution of land use, comprising the following steps:

[0071] Step 1. Divide the research period into natural period and change period according to the runoff mutation point;

[0072] Step 2, divide the change period into M segments according to the characteristics of land use evolution;

[0073] Step 3, establish a watershed SWAT model;

[0074] Step 4, according to the natural period data calibration watershed SWAT model parameters;

[0075] Step 5: Quantitative calculation of the rolling attribution of runoff changes in the watershed section by section and item by item.

[0076] In a further embodiment, the present invention adopts the Pettitt test method to conduct a mutation test on ...

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Abstract

The invention discloses a runoff change attribution recognition method considering land utilization spatial-temporal evolution. The method comprises the steps that a research period is divided into a natural period and a change period according to runoff sudden change characteristics; the change period is segmented according to land utilization evolution characteristics; a basin SWAT model is established; model parameters are calibrated; and basin runoff change is calculated in a segment-by-segment item-by-item rolling and attribution quantification mode. Through the method, the change period is finely divided according to the evolution characteristics of land utilization to fully consider land utilization evolution conditions, basin underlying surface characteristics can be accurately described and hydrologic process characteristics can be effectively simulated based on the SWAT model, a basin distributed hydrologic model is established to describe the hydrologic process, and influences of land utilization evolution on runoff are fully considered in an attribution quantification recognition result obtained by calculating the runoff change in the basin research period in a segment-by-segment item-by-item rolling mode.

Description

technical field [0001] The invention relates to a watershed runoff change attribution identification technology in the field of water conservancy engineering, in particular to a runoff change attribution identification method considering the temporal and spatial evolution of land use. Background technique [0002] In the past century, affected by global warming, the hydrological cycle has intensified, and the frequency and intensity of extreme runoff events have increased to a certain extent. The continuous enhancement of social and economic activities and the construction of high-density water conservancy projects have formed a complex impact chain of human activities. Studies have shown that among many human activities, land use changes have changed the conditions of the underlying surface, thereby changing the conditions of runoff production and confluence, and affecting runoff. Changes played a particularly pronounced role. For a long time, the historical runoff sequenc...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 钟平安张宇陈娟徐斌付吉斯陈佳蕾
Owner HOHAI UNIV
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